Use custom for of grpc-go and unify client and server

Gopkg.lock

@@ -32,10 +32,11 @@
   version = "v1.2.0"
 
 [[projects]]
+  branch = "set-content-type-in-response"
   name = "github.com/improbable-eng/grpc-web"
   packages = ["go/grpcweb"]
-  revision = "72eb701d6f320ca324b3347c7925a720b553eae5"
+  revision = "4883019eae31cf9b891633279c6a92d0597ea920"
-  version = "0.6.2"
+  source = "github.com/johanbrandhorst/grpc-web"
 
 [[projects]]
   branch = "master"
@@ -47,7 +48,6 @@
   branch = "master"
   name = "github.com/johanbrandhorst/grpc-wasm"
   packages = [
-    ".",
     "protoc-gen-wasm",
     "protoc-gen-wasm/generator",
     "protoc-gen-wasm/generator/internal/remap",
@@ -145,21 +145,23 @@
   revision = "86e600f69ee4704c6efbf6a2a40a5c10700e76c2"
 
 [[projects]]
+  branch = "add-grpc-web-client"
   name = "google.golang.org/grpc"
   packages = [
     ".",
     "balancer",
     "balancer/base",
     "balancer/roundrobin",
-    "channelz",
     "codes",
     "connectivity",
     "credentials",
     "encoding",
     "encoding/proto",
-    "grpclb/grpc_lb_v1/messages",
     "grpclog",
     "internal",
+    "internal/backoff",
+    "internal/channelz",
+    "internal/grpcrand",
     "keepalive",
     "metadata",
     "naming",
@@ -172,12 +174,12 @@
     "tap",
     "transport"
   ]
-  revision = "41344da2231b913fa3d983840a57a6b1b7b631a1"
+  revision = "43e0a181510c90bb1c9a9a3d73f33df55bd21295"
-  version = "v1.12.0"
+  source = "github.com/johanbrandhorst/grpc-go"
 
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "32259474a7120b027d79b02dc0b1f1f13673342b660d3f55bcc442b6499ee37c"
+  inputs-digest = "efb2981e5b7917b202cb0cfb3d8782af1275313b68c739acabf2ccd70258fd97"
   solver-name = "gps-cdcl"
   solver-version = 1

Gopkg.toml

@@ -3,14 +3,6 @@ required = [
   "github.com/golang/protobuf/protoc-gen-go",
 ]
 
-[[constraint]]
-  branch = "master"
-  name = "github.com/johanbrandhorst/fetch"
-
-[[constraint]]
-  branch = "master"
-  name = "github.com/johanbrandhorst/grpc-wasm"
-
 [[constraint]]
   version = "1.1.0"
   name = "github.com/golang/protobuf"
@@ -20,8 +12,19 @@ required = [
   name = "google.golang.org/genproto"
 
 [[constraint]]
-  version = "1.12.0"
+  branch = "add-grpc-web-client"
   name = "google.golang.org/grpc"
+  source = "github.com/johanbrandhorst/grpc-go"
+
+[[override]]
+  branch = "add-grpc-web-client"
+  name = "google.golang.org/grpc"
+  source = "github.com/johanbrandhorst/grpc-go"
+
+[[constraint]]
+  branch = "set-content-type-in-response"
+  name = "github.com/improbable-eng/grpc-web"
+  source = "github.com/johanbrandhorst/grpc-web"
 
 [prune]
   go-tests = true

fetch/Makefile

@@ -4,4 +4,4 @@ clean:
 	rm -f ../html/test.wasm
 
 compile:
-	GOOS=js GOARCH=wasm GOROOT=$(GOPATH)/src/github.com/neelance/go/ $(GOPATH)/src/github.com/neelance/go/bin/go build -o ../html/test.wasm main.go
+	GOOS=js GOARCH=wasm GOROOT=$(GOPATH)/src/github.com/johanbrandhorst/go/ $(GOPATH)/src/github.com/johanbrandhorst/go/bin/go build -o ../html/test.wasm main.go

grpc/Makefile

@@ -1,9 +1,37 @@
 generate:
 	protoc -I. ./proto/web.proto \
-		--go_out=plugins=grpc:$$GOPATH/src \
+		--go_out=plugins=grpc:$$GOPATH/src
-		--wasm_out=plugins=grpc:./
-	mv ./proto/web.wasm.pb.go ./proto/client/
 	go generate -x ./frontend/
 
+to_frontend:
+	cd ../../../../google.golang.org/grpc && \
+		mv -f parse_js.gox parse_js.go && \
+		mv -f parse.go parse.gox && \
+		mv -f newstream_js.gox newstream_js.go && \
+		mv -f newstream.go newstream.gox && \
+		mv -f dial_js.gox dial_js.go && \
+		mv -f dial.go dial.gox && \
+		mv -f transport/stream_js.gox transport/stream_js.go && \
+		mv -f transport/stream.go transport/stream.gox && \
+		mv -f transport/client_transport_js.gox transport/client_transport_js.go && \
+		mv -f transport/client_transport.go transport/client_transport.gox && \
+		mv -f transport/content_type_js.gox transport/content_type_js.go && \
+		mv -f transport/content_type.go transport/content_type.gox
+
+to_backend:
+	cd ../../../../google.golang.org/grpc && \
+		mv -f parse_js.go parse_js.gox && \
+		mv -f parse.gox parse.go && \
+		mv -f newstream_js.go newstream_js.gox && \
+		mv -f newstream.gox newstream.go && \
+		mv -f dial_js.go dial_js.gox && \
+		mv -f dial.gox dial.go && \
+		mv -f transport/stream_js.go transport/stream_js.gox && \
+		mv -f transport/stream.gox transport/stream.go && \
+		mv -f transport/client_transport_js.go transport/client_transport_js.gox && \
+		mv -f transport/client_transport.gox transport/client_transport.go && \
+		mv -f transport/content_type_js.go transport/content_type_js.gox && \
+		mv -f transport/content_type.gox transport/content_type.go
+
 serve:
 	go run main.go

grpc/backend/backend.go

@@ -9,7 +9,7 @@ import (
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 
-	"github.com/johanbrandhorst/wasm-experiments/grpc/proto/server"
+	web "github.com/johanbrandhorst/wasm-experiments/grpc/proto"
 )
 
 // Backend should be used to implement the server interface
@@ -18,9 +18,9 @@ type Backend struct {
 }
 
 // Ensure struct implements interface
-var _ server.BackendServer = (*Backend)(nil)
+var _ web.BackendServer = (*Backend)(nil)
 
-func (b Backend) GetUser(ctx context.Context, req *server.GetUserRequest) (*server.User, error) {
+func (b Backend) GetUser(ctx context.Context, req *web.GetUserRequest) (*web.User, error) {
 	if req.GetUserId() != "1234" {
 		st := status.New(codes.InvalidArgument, "invalid id")
 		detSt, err := st.WithDetails(&errdetails.BadRequest{
@@ -36,14 +36,14 @@ func (b Backend) GetUser(ctx context.Context, req *server.GetUserRequest) (*serv
 		}
 		return nil, st.Err()
 	}
-	return &server.User{
+	return &web.User{
 		Id: req.GetUserId(),
 	}, nil
 }
 
-func (b Backend) GetUsers(req *server.GetUsersRequest, srv server.Backend_GetUsersServer) error {
+func (b Backend) GetUsers(req *web.GetUsersRequest, srv web.Backend_GetUsersServer) error {
 	for index := 0; index < int(req.GetNumUsers()); index++ {
-		err := srv.Send(&server.User{
+		err := srv.Send(&web.User{
 			Id: strconv.Itoa(index),
 		})
 		if err != nil {

grpc/frontend/frontend.go

@@ -4,25 +4,36 @@ import (
 	"context"
 	"fmt"
 	"io"
+	"os"
 
 	_ "google.golang.org/genproto/googleapis/rpc/errdetails"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/grpclog"
 	"google.golang.org/grpc/status"
 
-	grpc "github.com/johanbrandhorst/grpc-wasm"
+	web "github.com/johanbrandhorst/wasm-experiments/grpc/proto"
-	server "github.com/johanbrandhorst/wasm-experiments/grpc/proto/client"
 )
 
 // Build with Go WASM fork
 //go:generate rm -f ./html/test.wasm
-//go:generate bash -c "GOOS=js GOARCH=wasm GOROOT=$GOPATH/src/github.com/neelance/go/ $GOPATH/src/github.com/neelance/go/bin/go build -o ./html/test.wasm frontend.go"
+//go:generate bash -c "GOOS=js GOARCH=wasm GOROOT=$GOPATH/src/github.com/johanbrandhorst/go/ $GOPATH/src/github.com/johanbrandhorst/go/bin/go build -o ./html/test.wasm frontend.go"
 
 // Integrate generated JS into a Go file for static loading.
 //go:generate bash -c "go run assets_generate.go"
 
+func init() {
+	// Should only be done from init functions
+	grpclog.SetLoggerV2(grpclog.NewLoggerV2(os.Stdout, os.Stdout, os.Stdout))
+}
+
 func main() {
-	cc, _ := grpc.Dial("")
+	cc, err := grpc.Dial("")
-	client := server.NewBackendClient(cc)
+	if err != nil {
-	resp, err := client.GetUser(context.Background(), &server.GetUserRequest{
+		fmt.Println(err)
+		return
+	}
+	client := web.NewBackendClient(cc)
+	resp, err := client.GetUser(context.Background(), &web.GetUserRequest{
 		UserId: "1234",
 	})
 	if err != nil {
@@ -31,7 +42,7 @@ func main() {
 	} else {
 		fmt.Println(resp.GetId())
 	}
-	resp, err = client.GetUser(context.Background(), &server.GetUserRequest{
+	resp, err = client.GetUser(context.Background(), &web.GetUserRequest{
 		UserId: "123",
 	})
 	if err != nil {
@@ -41,7 +52,7 @@ func main() {
 		fmt.Println(resp.GetId())
 	}
 
-	srv, err := client.GetUsers(context.Background(), &server.GetUsersRequest{
+	srv, err := client.GetUsers(context.Background(), &web.GetUsersRequest{
 		NumUsers: 3,
 	})
 	if err != nil {

grpc/frontend/html/wasm_exec.js

@@ -41,6 +41,11 @@
 				}
 				return buf.length;
 			},
+			openSync(path, flags, mode) {
+				const err = new Error("not implemented");
+				err.code = "ENOSYS";
+				throw err;
+			},
 		};
 	}
 
@@ -369,6 +374,7 @@
 			return go.run(result.instance);
 		}).catch((err) => {
 			console.error(err);
+			go.exited = true;
 			process.exit(1);
 		});
 	}

grpc/main.go

@@ -19,7 +19,7 @@ import (
 
 	"github.com/johanbrandhorst/wasm-experiments/grpc/backend"
 	"github.com/johanbrandhorst/wasm-experiments/grpc/frontend/bundle"
-	"github.com/johanbrandhorst/wasm-experiments/grpc/proto/server"
+	web "github.com/johanbrandhorst/wasm-experiments/grpc/proto"
 )
 
 var logger *logrus.Logger
@@ -39,7 +39,7 @@ func init() {
 
 func main() {
 	gs := grpc.NewServer()
-	server.RegisterBackendServer(gs, &backend.Backend{})
+	web.RegisterBackendServer(gs, &backend.Backend{})
 	wrappedServer := grpcweb.WrapServer(gs, grpcweb.WithWebsockets(true))
 
 	handler := func(resp http.ResponseWriter, req *http.Request) {

grpc/proto/client/web.wasm.pb.go

@@ -1,302 +0,0 @@
-// Code generated by protoc-gen-go. DO NOT EDIT.
-// source: proto/web.proto
-
-package server
-
-/*
-Web exposes a backend server over gRPC.
-*/
-
-import proto "github.com/golang/protobuf/proto"
-import fmt "fmt"
-import math "math"
-
-import (
-	context "golang.org/x/net/context"
-	grpc "github.com/johanbrandhorst/grpc-wasm"
-)
-
-// Reference imports to suppress errors if they are not otherwise used.
-var _ = proto.Marshal
-var _ = fmt.Errorf
-var _ = math.Inf
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the proto package it is being compiled against.
-// A compilation error at this line likely means your copy of the
-// proto package needs to be updated.
-const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
-
-type GetUserRequest struct {
-	UserId               string   `protobuf:"bytes,1,opt,name=user_id,json=userId,proto3" json:"user_id,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *GetUserRequest) Reset()         { *m = GetUserRequest{} }
-func (m *GetUserRequest) String() string { return proto.CompactTextString(m) }
-func (*GetUserRequest) ProtoMessage()    {}
-func (*GetUserRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_web_87670d45010119fa, []int{0}
-}
-func (m *GetUserRequest) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_GetUserRequest.Unmarshal(m, b)
-}
-func (m *GetUserRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_GetUserRequest.Marshal(b, m, deterministic)
-}
-func (dst *GetUserRequest) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_GetUserRequest.Merge(dst, src)
-}
-func (m *GetUserRequest) XXX_Size() int {
-	return xxx_messageInfo_GetUserRequest.Size(m)
-}
-func (m *GetUserRequest) XXX_DiscardUnknown() {
-	xxx_messageInfo_GetUserRequest.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_GetUserRequest proto.InternalMessageInfo
-
-func (m *GetUserRequest) GetUserId() string {
-	if m != nil {
-		return m.UserId
-	}
-	return ""
-}
-
-type User struct {
-	Id                   string   `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *User) Reset()         { *m = User{} }
-func (m *User) String() string { return proto.CompactTextString(m) }
-func (*User) ProtoMessage()    {}
-func (*User) Descriptor() ([]byte, []int) {
-	return fileDescriptor_web_87670d45010119fa, []int{1}
-}
-func (m *User) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_User.Unmarshal(m, b)
-}
-func (m *User) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_User.Marshal(b, m, deterministic)
-}
-func (dst *User) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_User.Merge(dst, src)
-}
-func (m *User) XXX_Size() int {
-	return xxx_messageInfo_User.Size(m)
-}
-func (m *User) XXX_DiscardUnknown() {
-	xxx_messageInfo_User.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_User proto.InternalMessageInfo
-
-func (m *User) GetId() string {
-	if m != nil {
-		return m.Id
-	}
-	return ""
-}
-
-type GetUsersRequest struct {
-	NumUsers             int64    `protobuf:"varint,1,opt,name=num_users,json=numUsers,proto3" json:"num_users,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *GetUsersRequest) Reset()         { *m = GetUsersRequest{} }
-func (m *GetUsersRequest) String() string { return proto.CompactTextString(m) }
-func (*GetUsersRequest) ProtoMessage()    {}
-func (*GetUsersRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_web_87670d45010119fa, []int{2}
-}
-func (m *GetUsersRequest) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_GetUsersRequest.Unmarshal(m, b)
-}
-func (m *GetUsersRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_GetUsersRequest.Marshal(b, m, deterministic)
-}
-func (dst *GetUsersRequest) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_GetUsersRequest.Merge(dst, src)
-}
-func (m *GetUsersRequest) XXX_Size() int {
-	return xxx_messageInfo_GetUsersRequest.Size(m)
-}
-func (m *GetUsersRequest) XXX_DiscardUnknown() {
-	xxx_messageInfo_GetUsersRequest.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_GetUsersRequest proto.InternalMessageInfo
-
-func (m *GetUsersRequest) GetNumUsers() int64 {
-	if m != nil {
-		return m.NumUsers
-	}
-	return 0
-}
-
-func init() {
-	proto.RegisterType((*GetUserRequest)(nil), "web.GetUserRequest")
-	proto.RegisterType((*User)(nil), "web.User")
-	proto.RegisterType((*GetUsersRequest)(nil), "web.GetUsersRequest")
-}
-
-// Reference imports to suppress errors if they are not otherwise used.
-var _ context.Context
-var _ grpc.ClientConn
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the grpc package it is being compiled against.
-const _ = grpc.SupportPackageIsVersion4
-
-// BackendClient is the client API for Backend service.
-//
-// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
-type BackendClient interface {
-	GetUser(ctx context.Context, in *GetUserRequest, opts ...grpc.CallOption) (*User, error)
-	GetUsers(ctx context.Context, in *GetUsersRequest, opts ...grpc.CallOption) (Backend_GetUsersClient, error)
-}
-
-type backendClient struct {
-	cc *grpc.ClientConn
-}
-
-func NewBackendClient(cc *grpc.ClientConn) BackendClient {
-	return &backendClient{cc}
-}
-
-func (c *backendClient) GetUser(ctx context.Context, in *GetUserRequest, opts ...grpc.CallOption) (*User, error) {
-	out := new(User)
-	err := c.cc.Invoke(ctx, "/web.Backend/GetUser", in, out, opts...)
-	if err != nil {
-		return nil, err
-	}
-	return out, nil
-}
-
-func (c *backendClient) GetUsers(ctx context.Context, in *GetUsersRequest, opts ...grpc.CallOption) (Backend_GetUsersClient, error) {
-	stream, err := c.cc.NewStream(ctx, &_Backend_serviceDesc.Streams[0], "/web.Backend/GetUsers", opts...)
-	if err != nil {
-		return nil, err
-	}
-	x := &backendGetUsersClient{stream}
-	if err := x.ClientStream.SendMsg(in); err != nil {
-		return nil, err
-	}
-	if err := x.ClientStream.CloseSend(); err != nil {
-		return nil, err
-	}
-	return x, nil
-}
-
-type Backend_GetUsersClient interface {
-	Recv() (*User, error)
-	grpc.ClientStream
-}
-
-type backendGetUsersClient struct {
-	grpc.ClientStream
-}
-
-func (x *backendGetUsersClient) Recv() (*User, error) {
-	m := new(User)
-	if err := x.ClientStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-// BackendServer is the server API for Backend service.
-type BackendServer interface {
-	GetUser(context.Context, *GetUserRequest) (*User, error)
-	GetUsers(*GetUsersRequest, Backend_GetUsersServer) error
-}
-
-func RegisterBackendServer(s *grpc.Server, srv BackendServer) {
-	s.RegisterService(&_Backend_serviceDesc, srv)
-}
-
-func _Backend_GetUser_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
-	in := new(GetUserRequest)
-	if err := dec(in); err != nil {
-		return nil, err
-	}
-	if interceptor == nil {
-		return srv.(BackendServer).GetUser(ctx, in)
-	}
-	info := &grpc.UnaryServerInfo{
-		Server:     srv,
-		FullMethod: "/web.Backend/GetUser",
-	}
-	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
-		return srv.(BackendServer).GetUser(ctx, req.(*GetUserRequest))
-	}
-	return interceptor(ctx, in, info, handler)
-}
-
-func _Backend_GetUsers_Handler(srv interface{}, stream grpc.ServerStream) error {
-	m := new(GetUsersRequest)
-	if err := stream.RecvMsg(m); err != nil {
-		return err
-	}
-	return srv.(BackendServer).GetUsers(m, &backendGetUsersServer{stream})
-}
-
-type Backend_GetUsersServer interface {
-	Send(*User) error
-	grpc.ServerStream
-}
-
-type backendGetUsersServer struct {
-	grpc.ServerStream
-}
-
-func (x *backendGetUsersServer) Send(m *User) error {
-	return x.ServerStream.SendMsg(m)
-}
-
-var _Backend_serviceDesc = grpc.ServiceDesc{
-	ServiceName: "web.Backend",
-	HandlerType: (*BackendServer)(nil),
-	Methods: []grpc.MethodDesc{
-		{
-			MethodName: "GetUser",
-			Handler:    _Backend_GetUser_Handler,
-		},
-	},
-	Streams: []grpc.StreamDesc{
-		{
-			StreamName:    "GetUsers",
-			Handler:       _Backend_GetUsers_Handler,
-			ServerStreams: true,
-		},
-	},
-	Metadata: "proto/web.proto",
-}
-
-func init() { proto.RegisterFile("proto/web.proto", fileDescriptor_web_87670d45010119fa) }
-
-var fileDescriptor_web_87670d45010119fa = []byte{
-	// 236 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x6c, 0x90, 0xc1, 0x4b, 0xc3, 0x30,
-	0x18, 0xc5, 0xdd, 0x26, 0xeb, 0xfa, 0x1d, 0x36, 0x88, 0xa2, 0xa2, 0x17, 0xe9, 0x49, 0x11, 0x1b,
-	0xd1, 0xb3, 0x08, 0xbb, 0x88, 0xd7, 0x82, 0x17, 0x2f, 0xa3, 0x69, 0x3e, 0xda, 0x2a, 0x49, 0xea,
-	0xf7, 0x25, 0xd6, 0x3f, 0x5f, 0x12, 0x37, 0x51, 0xf0, 0x96, 0xf7, 0xf2, 0x7b, 0x2f, 0x8f, 0xc0,
-	0x6a, 0x20, 0xe7, 0x9d, 0x1c, 0x51, 0x95, 0xe9, 0x24, 0x66, 0x23, 0xaa, 0xe2, 0x12, 0x96, 0x8f,
-	0xe8, 0x9f, 0x19, 0xa9, 0xc2, 0xf7, 0x80, 0xec, 0xc5, 0x31, 0x64, 0x81, 0x91, 0x36, 0xbd, 0x3e,
-	0x99, 0x9c, 0x4f, 0x2e, 0xf2, 0x6a, 0x1e, 0xe5, 0x93, 0x2e, 0x8e, 0x60, 0x3f, 0x72, 0x62, 0x09,
-	0xd3, 0x9f, 0xbb, 0x69, 0xaf, 0x8b, 0x12, 0x56, 0xdb, 0x0a, 0xde, 0x75, 0x9c, 0x41, 0x6e, 0x83,
-	0xd9, 0xc4, 0x20, 0x27, 0x72, 0x56, 0x2d, 0x6c, 0x30, 0x89, 0xb9, 0x6d, 0x21, 0x5b, 0xd7, 0xcd,
-	0x1b, 0x5a, 0x2d, 0xae, 0x20, 0xdb, 0x46, 0xc5, 0x41, 0x19, 0x97, 0xfd, 0xdd, 0x72, 0x9a, 0x27,
-	0x33, 0x3a, 0xc5, 0x9e, 0x90, 0xb0, 0xd8, 0xbd, 0x23, 0x0e, 0x7f, 0xd3, 0xfc, 0x1f, 0x7e, 0x33,
-	0x59, 0x3f, 0xbc, 0xdc, 0xb7, 0xbd, 0xef, 0x82, 0x2a, 0x1b, 0x67, 0xe4, 0xab, 0xeb, 0x6a, 0xab,
-	0xa8, 0xb6, 0xba, 0x73, 0xc4, 0x5e, 0x8e, 0x35, 0x9b, 0x6b, 0xfc, 0x1c, 0x90, 0x7a, 0x83, 0xd6,
-	0xb3, 0x6c, 0x69, 0x68, 0xe4, 0xf7, 0x27, 0x31, 0xd2, 0x07, 0x92, 0x9a, 0x27, 0x75, 0xf7, 0x15,
-	0x00, 0x00, 0xff, 0xff, 0x75, 0x28, 0x26, 0x8f, 0x3b, 0x01, 0x00, 0x00,
-}

grpc/proto/web.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // source: proto/web.proto
 
-package server // import "github.com/johanbrandhorst/wasm-experiments/grpc/proto/server"
+package web // import "github.com/johanbrandhorst/wasm-experiments/grpc/proto"
 
 /*
 Web exposes a backend server over gRPC.
@@ -38,7 +38,7 @@ func (m *GetUserRequest) Reset()         { *m = GetUserRequest{} }
 func (m *GetUserRequest) String() string { return proto.CompactTextString(m) }
 func (*GetUserRequest) ProtoMessage()    {}
 func (*GetUserRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_web_87670d45010119fa, []int{0}
+	return fileDescriptor_web_fab68bbab7573337, []int{0}
 }
 func (m *GetUserRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_GetUserRequest.Unmarshal(m, b)
@@ -76,7 +76,7 @@ func (m *User) Reset()         { *m = User{} }
 func (m *User) String() string { return proto.CompactTextString(m) }
 func (*User) ProtoMessage()    {}
 func (*User) Descriptor() ([]byte, []int) {
-	return fileDescriptor_web_87670d45010119fa, []int{1}
+	return fileDescriptor_web_fab68bbab7573337, []int{1}
 }
 func (m *User) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_User.Unmarshal(m, b)
@@ -114,7 +114,7 @@ func (m *GetUsersRequest) Reset()         { *m = GetUsersRequest{} }
 func (m *GetUsersRequest) String() string { return proto.CompactTextString(m) }
 func (*GetUsersRequest) ProtoMessage()    {}
 func (*GetUsersRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_web_87670d45010119fa, []int{2}
+	return fileDescriptor_web_fab68bbab7573337, []int{2}
 }
 func (m *GetUsersRequest) XXX_Unmarshal(b []byte) error {
 	return xxx_messageInfo_GetUsersRequest.Unmarshal(m, b)
@@ -280,23 +280,23 @@ var _Backend_serviceDesc = grpc.ServiceDesc{
 	Metadata: "proto/web.proto",
 }
 
-func init() { proto.RegisterFile("proto/web.proto", fileDescriptor_web_87670d45010119fa) }
+func init() { proto.RegisterFile("proto/web.proto", fileDescriptor_web_fab68bbab7573337) }
 
-var fileDescriptor_web_87670d45010119fa = []byte{
+var fileDescriptor_web_fab68bbab7573337 = []byte{
-	// 236 bytes of a gzipped FileDescriptorProto
+	// 235 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x6c, 0x90, 0xc1, 0x4b, 0xc3, 0x30,
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x6c, 0x90, 0xb1, 0x4b, 0xc4, 0x30,
-	0x18, 0xc5, 0xdd, 0x26, 0xeb, 0xfa, 0x1d, 0x36, 0x88, 0xa2, 0xa2, 0x17, 0xe9, 0x49, 0x11, 0x1b,
+	0x18, 0xc5, 0xed, 0x9d, 0x5c, 0xaf, 0xdf, 0x70, 0x07, 0x51, 0x54, 0x74, 0x91, 0x4e, 0x8a, 0xd8,
-	0xd1, 0xb3, 0x08, 0xbb, 0x88, 0xd7, 0x82, 0x17, 0x2f, 0xa3, 0x69, 0x3e, 0xda, 0x2a, 0x49, 0xea,
+	0x88, 0x6e, 0xea, 0x74, 0x8b, 0xb8, 0x16, 0x5c, 0x5c, 0x8e, 0xa6, 0xf9, 0x68, 0xab, 0x24, 0xa9,
-	0xf7, 0x25, 0xd6, 0x3f, 0x5f, 0x12, 0x37, 0x51, 0xf0, 0x96, 0xf7, 0xf2, 0x7b, 0x2f, 0x8f, 0xc0,
+	0xf9, 0x12, 0xe2, 0x9f, 0x2f, 0x09, 0x57, 0x51, 0xb8, 0xed, 0xe5, 0xe5, 0xf7, 0x5e, 0x1e, 0x81,
-	0x6a, 0x20, 0xe7, 0x9d, 0x1c, 0x51, 0x95, 0xe9, 0x24, 0x66, 0x23, 0xaa, 0xe2, 0x12, 0x96, 0x8f,
+	0xf5, 0x68, 0x8d, 0x33, 0x3c, 0xa0, 0xa8, 0x92, 0x62, 0xf3, 0x80, 0xa2, 0xbc, 0x86, 0xd5, 0x0b,
-	0xe8, 0x9f, 0x19, 0xa9, 0xc2, 0xf7, 0x80, 0xec, 0xc5, 0x31, 0x64, 0x81, 0x91, 0x36, 0xbd, 0x3e,
+	0xba, 0x37, 0x42, 0x5b, 0xe3, 0x97, 0x47, 0x72, 0xec, 0x14, 0x72, 0x4f, 0x68, 0xb7, 0x83, 0x3c,
-	0x99, 0x9c, 0x4f, 0x2e, 0xf2, 0x6a, 0x1e, 0xe5, 0x93, 0x2e, 0x8e, 0x60, 0x3f, 0x72, 0x62, 0x09,
+	0xcb, 0x2e, 0xb3, 0xab, 0xa2, 0x5e, 0xc4, 0xe3, 0xab, 0x2c, 0x4f, 0xe0, 0x30, 0x72, 0x6c, 0x05,
-	0xd3, 0x9f, 0xbb, 0x69, 0xaf, 0x8b, 0x12, 0x56, 0xdb, 0x0a, 0xde, 0x75, 0x9c, 0x41, 0x6e, 0x83,
+	0xb3, 0xdf, 0xbb, 0xd9, 0x20, 0xcb, 0x0a, 0xd6, 0xbb, 0x0a, 0x9a, 0x3a, 0x2e, 0xa0, 0xd0, 0x5e,
-	0xd9, 0xc4, 0x20, 0x27, 0x72, 0x56, 0x2d, 0x6c, 0x30, 0x89, 0xb9, 0x6d, 0x21, 0x5b, 0xd7, 0xcd,
+	0x6d, 0x63, 0x90, 0x12, 0x39, 0xaf, 0x97, 0xda, 0xab, 0xc4, 0xdc, 0x77, 0x90, 0x6f, 0x9a, 0xf6,
-	0x1b, 0x5a, 0x2d, 0xae, 0x20, 0xdb, 0x46, 0xc5, 0x41, 0x19, 0x97, 0xfd, 0xdd, 0x72, 0x9a, 0x27,
+	0x13, 0xb5, 0x64, 0x37, 0x90, 0xef, 0xa2, 0xec, 0xa8, 0x8a, 0xcb, 0xfe, 0x6f, 0x39, 0x2f, 0x92,
-	0x33, 0x3a, 0xc5, 0x9e, 0x90, 0xb0, 0xd8, 0xbd, 0x23, 0x0e, 0x7f, 0xd3, 0xfc, 0x1f, 0x7e, 0x33,
+	0x19, 0x9d, 0xf2, 0x80, 0x71, 0x58, 0x4e, 0xef, 0xb0, 0xe3, 0xbf, 0x34, 0xed, 0xc3, 0xef, 0xb2,
-	0x59, 0x3f, 0xbc, 0xdc, 0xb7, 0xbd, 0xef, 0x82, 0x2a, 0x1b, 0x67, 0xe4, 0xab, 0xeb, 0x6a, 0xab,
+	0xcd, 0xf3, 0xfb, 0x63, 0x37, 0xb8, 0xde, 0x8b, 0xaa, 0x35, 0x8a, 0x7f, 0x98, 0xbe, 0xd1, 0xc2,
-	0xa8, 0xb6, 0xba, 0x73, 0xc4, 0x5e, 0x8e, 0x35, 0x9b, 0x6b, 0xfc, 0x1c, 0x90, 0x7a, 0x83, 0xd6,
+	0x36, 0x5a, 0xf6, 0xc6, 0x92, 0xe3, 0xa1, 0x21, 0x75, 0x8b, 0xdf, 0x23, 0xda, 0x41, 0xa1, 0x76,
-	0xb3, 0x6c, 0x69, 0x68, 0xe4, 0xf7, 0x27, 0x31, 0xd2, 0x07, 0x92, 0x9a, 0x27, 0x75, 0xf7, 0x15,
+	0xc4, 0x3b, 0x3b, 0xb6, 0x3c, 0x7d, 0xcd, 0x53, 0x40, 0x21, 0x16, 0x49, 0x3e, 0xfc, 0x04, 0x00,
-	0x00, 0x00, 0xff, 0xff, 0x75, 0x28, 0x26, 0x8f, 0x3b, 0x01, 0x00, 0x00,
+	0x00, 0xff, 0xff, 0xaf, 0xf7, 0xf4, 0x4f, 0x38, 0x01, 0x00, 0x00,
 }

grpc/proto/web.proto

@@ -3,7 +3,7 @@ syntax = "proto3";
 // Web exposes a backend server over gRPC.
 package web;
 
-option go_package = "github.com/johanbrandhorst/wasm-experiments/grpc/proto/server";
+option go_package = "github.com/johanbrandhorst/wasm-experiments/grpc/proto;web";
 
 // Backend defines the interface exposed by the backend.
 service Backend {

vendor/github.com/improbable-eng/grpc-web/go/grpcweb/grpc_web_response.go

@@ -90,6 +90,7 @@ func (w *grpcWebResponse) copyTrailersAndHeadersToWrapped() {
 		}
 	}
 	w.writeCorsExposedHeaders()
+	hackIntogRPCWebContentType(wrappedHeader)
 	w.wrapped.WriteHeader(http.StatusOK)
 	w.wrapped.(http.Flusher).Flush()
 }
@@ -134,5 +135,11 @@ func (w *grpcWebResponse) extractTrailerHeaders() http.Header {
 			trailerHeaders.Add(k, v)
 		}
 	}
+	hackIntogRPCWebContentType(trailerHeaders)
 	return trailerHeaders
 }
+
+func hackIntogRPCWebContentType(in http.Header) {
+	contentType := in.Get("content-type")
+	in.Set("content-type", strings.Replace(contentType, "application/grpc", "application/grpc-web", 1))
+}

vendor/github.com/johanbrandhorst/grpc-wasm/.gitignore

@@ -1 +0,0 @@
-.vscode

vendor/github.com/johanbrandhorst/grpc-wasm/Makefile

@@ -1,5 +0,0 @@
-update-plugin:
-	# https://stackoverflow.com/a/39317180
-	svn export https://github.com/golang/protobuf/trunk/protoc-gen-go
-	rm -rf protoc-gen-wasm
-	mv protoc-gen-go protoc-gen-wasm

vendor/github.com/johanbrandhorst/grpc-wasm/README.md

@@ -1,2 +0,0 @@
-# gRPC-WASM
-gRPC-Web implementation in Go. Built as a drop-in alternative to google.golang.org/grpc.

vendor/github.com/johanbrandhorst/grpc-wasm/calloptions.go

@@ -1,22 +0,0 @@
-// +build js,wasm
-
-package grpc
-
-// CallOption configures a Call before it starts or extracts information from
-// a Call after it completes.
-type CallOption interface {
-	// before is called before the call is sent to any server.  If before
-	// returns a non-nil error, the RPC fails with that error.
-	before(*callInfo) error
-
-	// after is called after the call has completed.  after cannot return an
-	// error, so any failures should be reported via output parameters.
-	after(*callInfo)
-}
-
-type callInfo struct {
-}
-
-func defaultCallInfo() *callInfo {
-	return &callInfo{}
-}

vendor/github.com/johanbrandhorst/grpc-wasm/clientconn.go

@@ -1,234 +0,0 @@
-// +build js,wasm
-
-package grpc
-
-import (
-	"bufio"
-	"bytes"
-	"context"
-	"encoding/base64"
-	"encoding/binary"
-	"errors"
-	"io"
-	"net/http"
-	"strconv"
-	"strings"
-	"time"
-
-	"github.com/golang/protobuf/proto"
-	spb "google.golang.org/genproto/googleapis/rpc/status"
-	"google.golang.org/grpc/codes"
-	"google.golang.org/grpc/metadata"
-	"google.golang.org/grpc/status"
-)
-
-type ClientConn struct {
-	target string
-}
-
-// Dial creates a client connection to the target. The target string should
-// be a URL with scheme HTTP or HTTPS, or a FQDN to infer the scheme.
-func Dial(target string, opts ...DialOption) (*ClientConn, error) {
-	return DialContext(context.Background(), target, opts...)
-}
-
-func DialContext(ctx context.Context, target string, opts ...DialOption) (conn *ClientConn, err error) {
-	return &ClientConn{
-		target: target,
-	}, nil
-}
-
-func (cc *ClientConn) NewStream(ctx context.Context, desc *StreamDesc, method string, opts ...CallOption) (ClientStream, error) {
-	if desc.ClientStreams {
-		return nil, status.Error(codes.Unimplemented, "client-side streaming is not supported by grpc-web")
-	}
-
-	endpoint := cc.target + "/" + method
-	if cc.target == "" {
-		endpoint = method
-	}
-
-	return newStream(ctx, endpoint)
-}
-
-func (cc *ClientConn) Invoke(ctx context.Context, method string, args, reply interface{}, opts ...CallOption) error {
-	b, err := proto.Marshal(args.(proto.Message))
-	if err != nil {
-		return status.Error(codes.Internal, err.Error())
-	}
-
-	bufHeader := make([]byte, 5)
-
-	// Write length of b into buf
-	binary.BigEndian.PutUint32(bufHeader[1:], uint32(len(b)))
-
-	endpoint := cc.target + "/" + method
-	if cc.target == "" {
-		endpoint = method
-	}
-	req, err := http.NewRequest(
-		"POST",
-		endpoint,
-		bytes.NewBuffer(append(bufHeader, b...)),
-	)
-	if err != nil {
-		return status.Error(codes.Unavailable, err.Error())
-	}
-	req = req.WithContext(ctx)
-	addHeaders(req)
-
-	resp, err := http.DefaultClient.Do(req)
-	if err != nil {
-		return status.Error(codes.Internal, err.Error())
-	}
-	defer resp.Body.Close()
-
-	st := statusFromHeaders(resp.Header)
-	if st.Code() != codes.OK {
-		return st.Err()
-	}
-
-	msgHeader := make([]byte, 5)
-	for {
-		_, err := resp.Body.Read(msgHeader)
-		if err != nil {
-			return status.Error(codes.Internal, err.Error())
-		}
-		// 1 in MSB signifies that this is the trailer. Break loop.
-		// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-WEB.md#protocol-differences-vs-grpc-over-http2
-		if msgHeader[0]>>7 == 1 {
-			break
-		}
-
-		msgLen := binary.BigEndian.Uint32(msgHeader[1:])
-
-		msg := make([]byte, msgLen)
-		_, err = resp.Body.Read(msg)
-		if err != nil {
-			return status.Error(codes.Internal, err.Error())
-		}
-		err = proto.Unmarshal(msg, reply.(proto.Message))
-		if err != nil {
-			return status.Error(codes.Internal, err.Error())
-		}
-	}
-
-	if msgHeader[0]&1 == 0 {
-		trailers, err := readTrailers(resp.Body)
-		if err != nil {
-			return status.Error(codes.Internal, err.Error())
-		}
-		st = statusFromHeaders(trailers)
-	} else {
-		// TODO(johanbrandhorst): Support compressed trailers
-	}
-
-	return st.Err()
-}
-
-func addHeaders(req *http.Request) {
-	// TODO: Add more headers
-	// https://github.com/grpc/grpc-go/blob/590da37e2dfb4705d8ebd9574ce4cb75295d9674/transport/http2_client.go#L356
-	req.Header.Add("content-type", "application/grpc-web+proto")
-	req.Header.Add("x-grpc-web", "1")
-	if dl, ok := req.Context().Deadline(); ok {
-		timeout := dl.Sub(time.Now())
-		req.Header.Add("grpc-timeout", encodeTimeout(timeout))
-	}
-	md, ok := metadata.FromOutgoingContext(req.Context())
-	if ok {
-		for h, vs := range md {
-			for _, v := range vs {
-				req.Header.Add(h, v)
-			}
-		}
-	}
-}
-
-const maxTimeoutValue int64 = 100000000 - 1
-
-// Copied from grpc-go
-// https://github.com/grpc/grpc-go/blob/590da37e2dfb4705d8ebd9574ce4cb75295d9674/transport/http_util.go#L388
-// div does integer division and round-up the result. Note that this is
-// equivalent to (d+r-1)/r but has less chance to overflow.
-func div(d, r time.Duration) int64 {
-	if m := d % r; m > 0 {
-		return int64(d/r + 1)
-	}
-	return int64(d / r)
-}
-
-// Copied from grpc-go
-// https://github.com/grpc/grpc-go/blob/590da37e2dfb4705d8ebd9574ce4cb75295d9674/transport/http_util.go#L398
-func encodeTimeout(t time.Duration) string {
-	if t <= 0 {
-		return "0n"
-	}
-	if d := div(t, time.Nanosecond); d <= maxTimeoutValue {
-		return strconv.FormatInt(d, 10) + "n"
-	}
-	if d := div(t, time.Microsecond); d <= maxTimeoutValue {
-		return strconv.FormatInt(d, 10) + "u"
-	}
-	if d := div(t, time.Millisecond); d <= maxTimeoutValue {
-		return strconv.FormatInt(d, 10) + "m"
-	}
-	if d := div(t, time.Second); d <= maxTimeoutValue {
-		return strconv.FormatInt(d, 10) + "S"
-	}
-	if d := div(t, time.Minute); d <= maxTimeoutValue {
-		return strconv.FormatInt(d, 10) + "M"
-	}
-	// Note that maxTimeoutValue * time.Hour > MaxInt64.
-	return strconv.FormatInt(div(t, time.Hour), 10) + "H"
-}
-
-// Copied from grpc-go
-// https://github.com/grpc/grpc-go/blob/b94ea975f3beb73799fac17cc24ee923fcd3cb5c/transport/http_util.go#L213
-func decodeBinHeader(v string) ([]byte, error) {
-	if len(v)%4 == 0 {
-		// Input was padded, or padding was not necessary.
-		return base64.StdEncoding.DecodeString(v)
-	}
-	return base64.RawStdEncoding.DecodeString(v)
-}
-
-func readTrailers(in io.Reader) (http.Header, error) {
-	s := bufio.NewScanner(in)
-	trailers := http.Header{}
-	for s.Scan() {
-		v := s.Text()
-		kv := strings.SplitN(v, ": ", 2)
-		if len(kv) != 2 {
-			return nil, errors.New("malformed header: " + v)
-		}
-		trailers.Add(kv[0], kv[1])
-	}
-
-	return trailers, s.Err()
-}
-
-func statusFromHeaders(h http.Header) *status.Status {
-	details := h.Get("grpc-status-details-bin")
-	if details != "" {
-		b, err := decodeBinHeader(details)
-		if err != nil {
-			return status.New(codes.Internal, "malformed grps-status-details-bin header: "+err.Error())
-		}
-		s := &spb.Status{}
-		err = proto.Unmarshal(b, s)
-		if err != nil {
-			return status.New(codes.Internal, "malformed grps-status-details-bin header: "+err.Error())
-		}
-		return status.FromProto(s)
-	}
-	sh := h.Get("grpc-status")
-	if sh != "" {
-		val, err := strconv.Atoi(sh)
-		if err != nil {
-			return status.New(codes.Internal, "malformed grpc-status header: "+err.Error())
-		}
-		return status.New(codes.Code(val), h.Get("grpc-message"))
-	}
-	return status.New(codes.OK, "")
-}

vendor/github.com/johanbrandhorst/grpc-wasm/clientstream.go

@@ -1,194 +0,0 @@
-// +build js,wasm
-
-package grpc
-
-import (
-	"bytes"
-	"context"
-	"encoding/binary"
-	"io"
-	"io/ioutil"
-	"net/http"
-
-	"github.com/golang/protobuf/proto"
-	"google.golang.org/grpc"
-	"google.golang.org/grpc/codes"
-	"google.golang.org/grpc/metadata"
-	"google.golang.org/grpc/status"
-)
-
-// ClientStream defines the interface a client stream has to satisfy.
-type ClientStream grpc.ClientStream
-
-// ServerStream defines the interface a server stream has to satisfy.
-type ServerStream grpc.ServerStream
-
-// StreamHandler defines the handler called by gRPC server to complete the
-// execution of a streaming RPC. If a StreamHandler returns an error, it
-// should be produced by the status package, or else gRPC will use
-// codes.Unknown as the status code and err.Error() as the status message
-// of the RPC.
-type StreamHandler func(srv interface{}, stream ServerStream) error
-
-// StreamDesc represents a streaming RPC service's method specification.
-type StreamDesc struct {
-	StreamName string
-	Handler    StreamHandler
-
-	// At least one of these is true.
-	ServerStreams bool
-	ClientStreams bool
-}
-
-type methodHandler func(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor UnaryServerInterceptor) (interface{}, error)
-
-// MethodDesc represents an RPC service's method specification.
-type MethodDesc struct {
-	MethodName string
-	Handler    methodHandler
-}
-
-// ServiceDesc represents an RPC service's specification.
-type ServiceDesc struct {
-	ServiceName string
-	// The pointer to the service interface. Used to check whether the user
-	// provided implementation satisfies the interface requirements.
-	HandlerType interface{}
-	Methods     []MethodDesc
-	Streams     []StreamDesc
-	Metadata    interface{}
-}
-
-type clientStream struct {
-	ctx   context.Context
-	req   *http.Request
-	errCh chan error
-	msgCh chan []byte
-}
-
-func newStream(ctx context.Context, endpoint string) (*clientStream, error) {
-	cs := &clientStream{
-		ctx: ctx,
-	}
-
-	req, err := http.NewRequest(
-		"POST",
-		endpoint,
-		nil,
-	)
-	if err != nil {
-		return nil, status.New(codes.Unavailable, err.Error()).Err()
-	}
-
-	cs.req = req.WithContext(ctx)
-	return cs, nil
-}
-
-func (c *clientStream) Header() (metadata.MD, error) {
-	return nil, nil
-}
-
-func (c *clientStream) Trailer() metadata.MD {
-	return nil
-}
-
-func (c *clientStream) Context() context.Context {
-	return c.ctx
-}
-
-func (c *clientStream) RecvMsg(reply interface{}) error {
-	select {
-	case <-c.ctx.Done():
-		return c.ctx.Err()
-	case err := <-c.errCh:
-		return err
-	case msg, ok := <-c.msgCh:
-		if !ok {
-			return io.EOF
-		}
-		err := proto.Unmarshal(msg, reply.(proto.Message))
-		return err
-	}
-}
-
-func (c *clientStream) SendMsg(req interface{}) error {
-	msg, err := proto.Marshal(req.(proto.Message))
-	if err != nil {
-		return status.Error(codes.Internal, err.Error())
-	}
-
-	bufHeader := make([]byte, 5)
-
-	// Write length of b into buf
-	binary.BigEndian.PutUint32(bufHeader[1:], uint32(len(msg)))
-
-	c.req.Body = ioutil.NopCloser(bytes.NewBuffer(append(bufHeader, msg...)))
-	addHeaders(c.req)
-
-	resp, err := http.DefaultClient.Do(c.req)
-	if err != nil {
-		return status.Error(codes.Unavailable, err.Error())
-	}
-
-	st := statusFromHeaders(resp.Header)
-	if st.Code() != codes.OK {
-		resp.Body.Close()
-		return st.Err()
-	}
-
-	c.errCh = make(chan error, 1)
-	c.msgCh = make(chan []byte, 1)
-
-	// Read response asynchronously
-	go func() {
-		defer resp.Body.Close()
-
-		msgHeader := make([]byte, 5)
-		for {
-			_, err := io.ReadFull(resp.Body, msgHeader)
-			if err != nil {
-				c.errCh <- status.Error(codes.Internal, err.Error())
-				return
-			}
-			// 1 in MSB signifies that this is the trailer. Break loop.
-			// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-WEB.md#protocol-differences-vs-grpc-over-http2
-			if msgHeader[0]>>7 == 1 {
-				break
-			}
-
-			msgLen := binary.BigEndian.Uint32(msgHeader[1:])
-
-			msg := make([]byte, msgLen)
-			_, err = io.ReadFull(resp.Body, msg)
-			if err != nil {
-				c.errCh <- status.Error(codes.Internal, err.Error())
-				return
-			}
-			c.msgCh <- msg
-		}
-
-		if msgHeader[0]&1 == 0 {
-			trailers, err := readTrailers(resp.Body)
-			if err != nil {
-				c.errCh <- status.Error(codes.Internal, err.Error())
-				return
-			}
-			st = statusFromHeaders(trailers)
-		} else {
-			// TODO(johanbrandhorst): Support compressed trailers
-		}
-
-		if st.Code() != codes.OK {
-			c.errCh <- st.Err()
-			return
-		}
-
-		close(c.msgCh)
-	}()
-
-	return nil
-}
-
-func (c *clientStream) CloseSend() error {
-	return nil
-}

vendor/github.com/johanbrandhorst/grpc-wasm/dialoptions.go

@@ -1,11 +0,0 @@
-// +build js,wasm
-
-package grpc
-
-// DialOption configures how we set up the connection.
-type DialOption func(*dialOptions)
-
-// dialOptions configure a Dial call. dialOptions are set by the DialOption
-// values passed to Dial.
-type dialOptions struct {
-}

vendor/github.com/johanbrandhorst/grpc-wasm/doc.go

@@ -1,17 +0,0 @@
-// +build js,wasm
-
-package grpc
-
-// The SupportPackageIsVersion variables are referenced from generated protocol
-// buffer files to ensure compatibility with the gRPC version used.  The latest
-// support package version is 4.
-//
-// Older versions are kept for compatibility. They may be removed if
-// compatibility cannot be maintained.
-//
-// These constants should not be referenced from any other code.
-//
-// Note: grpc-wasm is compatible with Version4+ files only.
-const (
-	SupportPackageIsVersion4 = true
-)

vendor/github.com/johanbrandhorst/grpc-wasm/interceptor.go

@@ -1,26 +0,0 @@
-// +build js,wasm
-
-package grpc
-
-import "context"
-
-// UnaryServerInfo consists of various information about a unary RPC on
-// server side. All per-rpc information may be mutated by the interceptor.
-type UnaryServerInfo struct {
-	// Server is the service implementation the user provides. This is read-only.
-	Server interface{}
-	// FullMethod is the full RPC method string, i.e., /package.service/method.
-	FullMethod string
-}
-
-// UnaryHandler defines the handler invoked by UnaryServerInterceptor to complete the normal
-// execution of a unary RPC. If a UnaryHandler returns an error, it should be produced by the
-// status package, or else gRPC will use codes.Unknown as the status code and err.Error() as
-// the status message of the RPC.
-type UnaryHandler func(ctx context.Context, req interface{}) (interface{}, error)
-
-// UnaryServerInterceptor provides a hook to intercept the execution of a unary RPC on the server. info
-// contains all the information of this RPC the interceptor can operate on. And handler is the wrapper
-// of the service method implementation. It is the responsibility of the interceptor to invoke handler
-// to complete the RPC.
-type UnaryServerInterceptor func(ctx context.Context, req interface{}, info *UnaryServerInfo, handler UnaryHandler) (resp interface{}, err error)

vendor/github.com/johanbrandhorst/grpc-wasm/server.go

@@ -1,8 +0,0 @@
-// +build js,wasm
-
-package grpc
-
-// Server is a gRPC server to serve RPC requests.
-type Server struct{}
-
-func (s *Server) RegisterService(sd *ServiceDesc, ss interface{}) {}

vendor/google.golang.org/grpc/.travis.yml

@@ -11,14 +11,19 @@ matrix:
   include:
   - go: 1.10.x
     env: RUN386=1
+  - go: 1.9.x
+    env: GAE=1
+
 
 go_import_path: google.golang.org/grpc
 
 before_install:
   - if [[ -n "$RUN386" ]]; then export GOARCH=386; fi
   - if [[ "$TRAVIS_GO_VERSION" = 1.10* && "$GOARCH" != "386" ]]; then ./vet.sh -install || exit 1; fi
+  - if [[ "$GAE" = 1 ]]; then source ./install_gae.sh || exit 1; fi
 
 script:
   - if [[ "$TRAVIS_GO_VERSION" = 1.10* && "$GOARCH" != "386" ]]; then ./vet.sh || exit 1; fi
+  - if [[ "$GAE" = 1 ]]; then make testappengine || exit 1; exit 0; fi
   - make test || exit 1
   - if [[ "$GOARCH" != "386" ]]; then make testrace; fi

vendor/google.golang.org/grpc/Makefile

@@ -9,6 +9,9 @@ updatedeps:
 testdeps:
 	go get -d -v -t google.golang.org/grpc/...
 
+testgaedeps:
+	goapp get -d -v -t -tags 'appengine appenginevm' google.golang.org/grpc/...
+
 updatetestdeps:
 	go get -d -v -t -u -f google.golang.org/grpc/...
 
@@ -31,6 +34,9 @@ test: testdeps
 testrace: testdeps
 	go test -race -cpu 1,4 -timeout 7m google.golang.org/grpc/...
 
+testappengine: testgaedeps
+	goapp test -cpu 1,4 -timeout 5m google.golang.org/grpc/...
+
 clean:
 	go clean -i google.golang.org/grpc/...
 
@@ -39,6 +45,7 @@ clean:
 	deps \
 	updatedeps \
 	testdeps \
+	testgaedeps \
 	updatetestdeps \
 	build \
 	proto \

vendor/google.golang.org/grpc/backoff.go

@@ -16,81 +16,23 @@
  *
  */
 
+// See internal/backoff package for the backoff implementation. This file is
+// kept for the exported types and API backward compatility.
+
 package grpc
 
 import (
-	"math/rand"
 	"time"
 )
 
 // DefaultBackoffConfig uses values specified for backoff in
 // https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md.
 var DefaultBackoffConfig = BackoffConfig{
-	MaxDelay:  120 * time.Second,
+	MaxDelay: 120 * time.Second,
-	baseDelay: 1.0 * time.Second,
-	factor:    1.6,
-	jitter:    0.2,
-}
-
-// backoffStrategy defines the methodology for backing off after a grpc
-// connection failure.
-//
-// This is unexported until the gRPC project decides whether or not to allow
-// alternative backoff strategies. Once a decision is made, this type and its
-// method may be exported.
-type backoffStrategy interface {
-	// backoff returns the amount of time to wait before the next retry given
-	// the number of consecutive failures.
-	backoff(retries int) time.Duration
 }
 
 // BackoffConfig defines the parameters for the default gRPC backoff strategy.
 type BackoffConfig struct {
 	// MaxDelay is the upper bound of backoff delay.
 	MaxDelay time.Duration
-
-	// TODO(stevvooe): The following fields are not exported, as allowing
-	// changes would violate the current gRPC specification for backoff. If
-	// gRPC decides to allow more interesting backoff strategies, these fields
-	// may be opened up in the future.
-
-	// baseDelay is the amount of time to wait before retrying after the first
-	// failure.
-	baseDelay time.Duration
-
-	// factor is applied to the backoff after each retry.
-	factor float64
-
-	// jitter provides a range to randomize backoff delays.
-	jitter float64
-}
-
-func setDefaults(bc *BackoffConfig) {
-	md := bc.MaxDelay
-	*bc = DefaultBackoffConfig
-
-	if md > 0 {
-		bc.MaxDelay = md
-	}
-}
-
-func (bc BackoffConfig) backoff(retries int) time.Duration {
-	if retries == 0 {
-		return bc.baseDelay
-	}
-	backoff, max := float64(bc.baseDelay), float64(bc.MaxDelay)
-	for backoff < max && retries > 0 {
-		backoff *= bc.factor
-		retries--
-	}
-	if backoff > max {
-		backoff = max
-	}
-	// Randomize backoff delays so that if a cluster of requests start at
-	// the same time, they won't operate in lockstep.
-	backoff *= 1 + bc.jitter*(rand.Float64()*2-1)
-	if backoff < 0 {
-		return 0
-	}
-	return time.Duration(backoff)
 }

vendor/google.golang.org/grpc/balancer/balancer.go

@@ -226,3 +226,45 @@ type Balancer interface {
 	// ClientConn.RemoveSubConn for its existing SubConns.
 	Close()
 }
+
+// ConnectivityStateEvaluator takes the connectivity states of multiple SubConns
+// and returns one aggregated connectivity state.
+//
+// It's not thread safe.
+type ConnectivityStateEvaluator struct {
+	numReady            uint64 // Number of addrConns in ready state.
+	numConnecting       uint64 // Number of addrConns in connecting state.
+	numTransientFailure uint64 // Number of addrConns in transientFailure.
+}
+
+// RecordTransition records state change happening in subConn and based on that
+// it evaluates what aggregated state should be.
+//
+//  - If at least one SubConn in Ready, the aggregated state is Ready;
+//  - Else if at least one SubConn in Connecting, the aggregated state is Connecting;
+//  - Else the aggregated state is TransientFailure.
+//
+// Idle and Shutdown are not considered.
+func (cse *ConnectivityStateEvaluator) RecordTransition(oldState, newState connectivity.State) connectivity.State {
+	// Update counters.
+	for idx, state := range []connectivity.State{oldState, newState} {
+		updateVal := 2*uint64(idx) - 1 // -1 for oldState and +1 for new.
+		switch state {
+		case connectivity.Ready:
+			cse.numReady += updateVal
+		case connectivity.Connecting:
+			cse.numConnecting += updateVal
+		case connectivity.TransientFailure:
+			cse.numTransientFailure += updateVal
+		}
+	}
+
+	// Evaluate.
+	if cse.numReady > 0 {
+		return connectivity.Ready
+	}
+	if cse.numConnecting > 0 {
+		return connectivity.Connecting
+	}
+	return connectivity.TransientFailure
+}

vendor/google.golang.org/grpc/balancer_v1_wrapper.go

@@ -55,7 +55,7 @@ func (bwb *balancerWrapperBuilder) Build(cc balancer.ClientConn, opts balancer.B
 		startCh:    make(chan struct{}),
 		conns:      make(map[resolver.Address]balancer.SubConn),
 		connSt:     make(map[balancer.SubConn]*scState),
-		csEvltr:    &connectivityStateEvaluator{},
+		csEvltr:    &balancer.ConnectivityStateEvaluator{},
 		state:      connectivity.Idle,
 	}
 	cc.UpdateBalancerState(connectivity.Idle, bw)
@@ -80,10 +80,6 @@ type balancerWrapper struct {
 	cc         balancer.ClientConn
 	targetAddr string // Target without the scheme.
 
-	// To aggregate the connectivity state.
-	csEvltr *connectivityStateEvaluator
-	state   connectivity.State
-
 	mu     sync.Mutex
 	conns  map[resolver.Address]balancer.SubConn
 	connSt map[balancer.SubConn]*scState
@@ -92,6 +88,10 @@ type balancerWrapper struct {
 	// - NewSubConn is created, cc wants to notify balancer of state changes;
 	// - Build hasn't return, cc doesn't have access to balancer.
 	startCh chan struct{}
+
+	// To aggregate the connectivity state.
+	csEvltr *balancer.ConnectivityStateEvaluator
+	state   connectivity.State
 }
 
 // lbWatcher watches the Notify channel of the balancer and manages
@@ -248,7 +248,7 @@ func (bw *balancerWrapper) HandleSubConnStateChange(sc balancer.SubConn, s conne
 			scSt.down(errConnClosing)
 		}
 	}
-	sa := bw.csEvltr.recordTransition(oldS, s)
+	sa := bw.csEvltr.RecordTransition(oldS, s)
 	if bw.state != sa {
 		bw.state = sa
 	}
@@ -326,47 +326,3 @@ func (bw *balancerWrapper) Pick(ctx context.Context, opts balancer.PickOptions)
 
 	return sc, done, nil
 }
-
-// connectivityStateEvaluator gets updated by addrConns when their
-// states transition, based on which it evaluates the state of
-// ClientConn.
-type connectivityStateEvaluator struct {
-	mu                  sync.Mutex
-	numReady            uint64 // Number of addrConns in ready state.
-	numConnecting       uint64 // Number of addrConns in connecting state.
-	numTransientFailure uint64 // Number of addrConns in transientFailure.
-}
-
-// recordTransition records state change happening in every subConn and based on
-// that it evaluates what aggregated state should be.
-// It can only transition between Ready, Connecting and TransientFailure. Other states,
-// Idle and Shutdown are transitioned into by ClientConn; in the beginning of the connection
-// before any subConn is created ClientConn is in idle state. In the end when ClientConn
-// closes it is in Shutdown state.
-// TODO Note that in later releases, a ClientConn with no activity will be put into an Idle state.
-func (cse *connectivityStateEvaluator) recordTransition(oldState, newState connectivity.State) connectivity.State {
-	cse.mu.Lock()
-	defer cse.mu.Unlock()
-
-	// Update counters.
-	for idx, state := range []connectivity.State{oldState, newState} {
-		updateVal := 2*uint64(idx) - 1 // -1 for oldState and +1 for new.
-		switch state {
-		case connectivity.Ready:
-			cse.numReady += updateVal
-		case connectivity.Connecting:
-			cse.numConnecting += updateVal
-		case connectivity.TransientFailure:
-			cse.numTransientFailure += updateVal
-		}
-	}
-
-	// Evaluate.
-	if cse.numReady > 0 {
-		return connectivity.Ready
-	}
-	if cse.numConnecting > 0 {
-		return connectivity.Connecting
-	}
-	return connectivity.TransientFailure
-}

vendor/google.golang.org/grpc/clientconn.go

@@ -32,11 +32,13 @@ import (
 	"golang.org/x/net/trace"
 	"google.golang.org/grpc/balancer"
 	_ "google.golang.org/grpc/balancer/roundrobin" // To register roundrobin.
-	"google.golang.org/grpc/channelz"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/connectivity"
 	"google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/internal"
+	"google.golang.org/grpc/internal/backoff"
+	"google.golang.org/grpc/internal/channelz"
 	"google.golang.org/grpc/keepalive"
 	"google.golang.org/grpc/resolver"
 	_ "google.golang.org/grpc/resolver/dns"         // To register dns resolver.
@@ -49,6 +51,8 @@ import (
 const (
 	// minimum time to give a connection to complete
 	minConnectTimeout = 20 * time.Second
+	// must match grpclbName in grpclb/grpclb.go
+	grpclbName = "grpclb"
 )
 
 var (
@@ -97,7 +101,7 @@ type dialOptions struct {
 	streamInt   StreamClientInterceptor
 	cp          Compressor
 	dc          Decompressor
-	bs          backoffStrategy
+	bs          backoff.Strategy
 	block       bool
 	insecure    bool
 	timeout     time.Duration
@@ -275,17 +279,17 @@ func WithBackoffMaxDelay(md time.Duration) DialOption {
 // Use WithBackoffMaxDelay until more parameters on BackoffConfig are opened up
 // for use.
 func WithBackoffConfig(b BackoffConfig) DialOption {
-	// Set defaults to ensure that provided BackoffConfig is valid and
+
-	// unexported fields get default values.
+	return withBackoff(backoff.Exponential{
-	setDefaults(&b)
+		MaxDelay: b.MaxDelay,
-	return withBackoff(b)
+	})
 }
 
 // withBackoff sets the backoff strategy used for connectRetryNum after a
 // failed connection attempt.
 //
 // This can be exported if arbitrary backoff strategies are allowed by gRPC.
-func withBackoff(bs backoffStrategy) DialOption {
+func withBackoff(bs backoff.Strategy) DialOption {
 	return func(o *dialOptions) {
 		o.bs = bs
 	}
@@ -340,6 +344,11 @@ func withContextDialer(f func(context.Context, string) (net.Conn, error)) DialOp
 	}
 }
 
+func init() {
+	internal.WithContextDialer = withContextDialer
+	internal.WithResolverBuilder = withResolverBuilder
+}
+
 // WithDialer returns a DialOption that specifies a function to use for dialing network addresses.
 // If FailOnNonTempDialError() is set to true, and an error is returned by f, gRPC checks the error's
 // Temporary() method to decide if it should try to reconnect to the network address.
@@ -469,19 +478,9 @@ func DialContext(ctx context.Context, target string, opts ...DialOption) (conn *
 		}
 	}
 
-	if !cc.dopts.insecure {
+	err = cc.validateClientOptions()
-		if cc.dopts.copts.TransportCredentials == nil {
+	if err != nil {
-			return nil, errNoTransportSecurity
+		return nil, err
-		}
-	} else {
-		if cc.dopts.copts.TransportCredentials != nil {
-			return nil, errCredentialsConflict
-		}
-		for _, cd := range cc.dopts.copts.PerRPCCredentials {
-			if cd.RequireTransportSecurity() {
-				return nil, errTransportCredentialsMissing
-			}
-		}
 	}
 
 	cc.mkp = cc.dopts.copts.KeepaliveParams
@@ -532,7 +531,9 @@ func DialContext(ctx context.Context, target string, opts ...DialOption) (conn *
 		}
 	}
 	if cc.dopts.bs == nil {
-		cc.dopts.bs = DefaultBackoffConfig
+		cc.dopts.bs = backoff.Exponential{
+			MaxDelay: DefaultBackoffConfig.MaxDelay,
+		}
 	}
 	if cc.dopts.resolverBuilder == nil {
 		// Only try to parse target when resolver builder is not already set.
@@ -1052,9 +1053,9 @@ func (cc *ClientConn) handleServiceConfig(js string) error {
 }
 
 func (cc *ClientConn) resolveNow(o resolver.ResolveNowOption) {
-	cc.mu.Lock()
+	cc.mu.RLock()
 	r := cc.resolverWrapper
-	cc.mu.Unlock()
+	cc.mu.RUnlock()
 	if r == nil {
 		return
 	}
@@ -1203,7 +1204,7 @@ func (ac *addrConn) resetTransport() error {
 			// This means either a successful HTTP2 connection was established
 			// or this is the first time this addrConn is trying to establish a
 			// connection.
-			backoffFor := ac.dopts.bs.backoff(connectRetryNum) // time.Duration.
+			backoffFor := ac.dopts.bs.Backoff(connectRetryNum) // time.Duration.
 			// This will be the duration that dial gets to finish.
 			dialDuration := getMinConnectTimeout()
 			if backoffFor > dialDuration {

vendor/google.golang.org/grpc/codes/codes.go

@@ -22,6 +22,7 @@ package codes // import "google.golang.org/grpc/codes"
 
 import (
 	"fmt"
+	"strconv"
 )
 
 // A Code is an unsigned 32-bit error code as defined in the gRPC spec.
@@ -143,6 +144,8 @@ const (
 	// Unauthenticated indicates the request does not have valid
 	// authentication credentials for the operation.
 	Unauthenticated Code = 16
+
+	_maxCode = 17
 )
 
 var strToCode = map[string]Code{
@@ -176,6 +179,16 @@ func (c *Code) UnmarshalJSON(b []byte) error {
 	if c == nil {
 		return fmt.Errorf("nil receiver passed to UnmarshalJSON")
 	}
+
+	if ci, err := strconv.ParseUint(string(b), 10, 32); err == nil {
+		if ci >= _maxCode {
+			return fmt.Errorf("invalid code: %q", ci)
+		}
+
+		*c = Code(ci)
+		return nil
+	}
+
 	if jc, ok := strToCode[string(b)]; ok {
 		*c = jc
 		return nil

vendor/google.golang.org/grpc/dial.go

@@ -0,0 +1,39 @@
+// +build !js !wasm
+
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package grpc
+
+func (cc ClientConn) validateClientOptions() error {
+	if !cc.dopts.insecure {
+		if cc.dopts.copts.TransportCredentials == nil {
+			return errNoTransportSecurity
+		}
+	} else {
+		if cc.dopts.copts.TransportCredentials != nil {
+			return errCredentialsConflict
+		}
+		for _, cd := range cc.dopts.copts.PerRPCCredentials {
+			if cd.RequireTransportSecurity() {
+				return errTransportCredentialsMissing
+			}
+		}
+	}
+	return nil
+}

vendor/google.golang.org/grpc/dial_js.go

@@ -0,0 +1,39 @@
+// +build js,wasm
+
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package grpc
+
+import (
+	"errors"
+)
+
+var (
+	// errTransportSecurity indicates the client was attempting an RPC call
+	// from a WASM client with TransportCredentials configured.
+	errTransportSecurity = errors.New("cannot configure transport security for WASM clients")
+)
+
+func (cc ClientConn) validateClientOptions() error {
+	if cc.dopts.copts.TransportCredentials != nil {
+		return errTransportSecurity
+	}
+
+	return nil
+}

vendor/google.golang.org/grpc/grpclb.go

@@ -1,341 +0,0 @@
-/*
- *
- * Copyright 2016 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-package grpc
-
-import (
-	"strconv"
-	"strings"
-	"sync"
-	"time"
-
-	"golang.org/x/net/context"
-	"google.golang.org/grpc/balancer"
-	"google.golang.org/grpc/connectivity"
-	lbpb "google.golang.org/grpc/grpclb/grpc_lb_v1/messages"
-	"google.golang.org/grpc/grpclog"
-	"google.golang.org/grpc/resolver"
-)
-
-const (
-	lbTokeyKey             = "lb-token"
-	defaultFallbackTimeout = 10 * time.Second
-	grpclbName             = "grpclb"
-)
-
-func convertDuration(d *lbpb.Duration) time.Duration {
-	if d == nil {
-		return 0
-	}
-	return time.Duration(d.Seconds)*time.Second + time.Duration(d.Nanos)*time.Nanosecond
-}
-
-// Client API for LoadBalancer service.
-// Mostly copied from generated pb.go file.
-// To avoid circular dependency.
-type loadBalancerClient struct {
-	cc *ClientConn
-}
-
-func (c *loadBalancerClient) BalanceLoad(ctx context.Context, opts ...CallOption) (*balanceLoadClientStream, error) {
-	desc := &StreamDesc{
-		StreamName:    "BalanceLoad",
-		ServerStreams: true,
-		ClientStreams: true,
-	}
-	stream, err := c.cc.NewStream(ctx, desc, "/grpc.lb.v1.LoadBalancer/BalanceLoad", opts...)
-	if err != nil {
-		return nil, err
-	}
-	x := &balanceLoadClientStream{stream}
-	return x, nil
-}
-
-type balanceLoadClientStream struct {
-	ClientStream
-}
-
-func (x *balanceLoadClientStream) Send(m *lbpb.LoadBalanceRequest) error {
-	return x.ClientStream.SendMsg(m)
-}
-
-func (x *balanceLoadClientStream) Recv() (*lbpb.LoadBalanceResponse, error) {
-	m := new(lbpb.LoadBalanceResponse)
-	if err := x.ClientStream.RecvMsg(m); err != nil {
-		return nil, err
-	}
-	return m, nil
-}
-
-func init() {
-	balancer.Register(newLBBuilder())
-}
-
-// newLBBuilder creates a builder for grpclb.
-func newLBBuilder() balancer.Builder {
-	return NewLBBuilderWithFallbackTimeout(defaultFallbackTimeout)
-}
-
-// NewLBBuilderWithFallbackTimeout creates a grpclb builder with the given
-// fallbackTimeout. If no response is received from the remote balancer within
-// fallbackTimeout, the backend addresses from the resolved address list will be
-// used.
-//
-// Only call this function when a non-default fallback timeout is needed.
-func NewLBBuilderWithFallbackTimeout(fallbackTimeout time.Duration) balancer.Builder {
-	return &lbBuilder{
-		fallbackTimeout: fallbackTimeout,
-	}
-}
-
-type lbBuilder struct {
-	fallbackTimeout time.Duration
-}
-
-func (b *lbBuilder) Name() string {
-	return grpclbName
-}
-
-func (b *lbBuilder) Build(cc balancer.ClientConn, opt balancer.BuildOptions) balancer.Balancer {
-	// This generates a manual resolver builder with a random scheme. This
-	// scheme will be used to dial to remote LB, so we can send filtered address
-	// updates to remote LB ClientConn using this manual resolver.
-	scheme := "grpclb_internal_" + strconv.FormatInt(time.Now().UnixNano(), 36)
-	r := &lbManualResolver{scheme: scheme, ccb: cc}
-
-	var target string
-	targetSplitted := strings.Split(cc.Target(), ":///")
-	if len(targetSplitted) < 2 {
-		target = cc.Target()
-	} else {
-		target = targetSplitted[1]
-	}
-
-	lb := &lbBalancer{
-		cc:              newLBCacheClientConn(cc),
-		target:          target,
-		opt:             opt,
-		fallbackTimeout: b.fallbackTimeout,
-		doneCh:          make(chan struct{}),
-
-		manualResolver: r,
-		csEvltr:        &connectivityStateEvaluator{},
-		subConns:       make(map[resolver.Address]balancer.SubConn),
-		scStates:       make(map[balancer.SubConn]connectivity.State),
-		picker:         &errPicker{err: balancer.ErrNoSubConnAvailable},
-		clientStats:    &rpcStats{},
-	}
-
-	return lb
-}
-
-type lbBalancer struct {
-	cc              *lbCacheClientConn
-	target          string
-	opt             balancer.BuildOptions
-	fallbackTimeout time.Duration
-	doneCh          chan struct{}
-
-	// manualResolver is used in the remote LB ClientConn inside grpclb. When
-	// resolved address updates are received by grpclb, filtered updates will be
-	// send to remote LB ClientConn through this resolver.
-	manualResolver *lbManualResolver
-	// The ClientConn to talk to the remote balancer.
-	ccRemoteLB *ClientConn
-
-	// Support client side load reporting. Each picker gets a reference to this,
-	// and will update its content.
-	clientStats *rpcStats
-
-	mu sync.Mutex // guards everything following.
-	// The full server list including drops, used to check if the newly received
-	// serverList contains anything new. Each generate picker will also have
-	// reference to this list to do the first layer pick.
-	fullServerList []*lbpb.Server
-	// All backends addresses, with metadata set to nil. This list contains all
-	// backend addresses in the same order and with the same duplicates as in
-	// serverlist. When generating picker, a SubConn slice with the same order
-	// but with only READY SCs will be gerenated.
-	backendAddrs []resolver.Address
-	// Roundrobin functionalities.
-	csEvltr  *connectivityStateEvaluator
-	state    connectivity.State
-	subConns map[resolver.Address]balancer.SubConn   // Used to new/remove SubConn.
-	scStates map[balancer.SubConn]connectivity.State // Used to filter READY SubConns.
-	picker   balancer.Picker
-	// Support fallback to resolved backend addresses if there's no response
-	// from remote balancer within fallbackTimeout.
-	fallbackTimerExpired bool
-	serverListReceived   bool
-	// resolvedBackendAddrs is resolvedAddrs minus remote balancers. It's set
-	// when resolved address updates are received, and read in the goroutine
-	// handling fallback.
-	resolvedBackendAddrs []resolver.Address
-}
-
-// regeneratePicker takes a snapshot of the balancer, and generates a picker from
-// it. The picker
-//  - always returns ErrTransientFailure if the balancer is in TransientFailure,
-//  - does two layer roundrobin pick otherwise.
-// Caller must hold lb.mu.
-func (lb *lbBalancer) regeneratePicker() {
-	if lb.state == connectivity.TransientFailure {
-		lb.picker = &errPicker{err: balancer.ErrTransientFailure}
-		return
-	}
-	var readySCs []balancer.SubConn
-	for _, a := range lb.backendAddrs {
-		if sc, ok := lb.subConns[a]; ok {
-			if st, ok := lb.scStates[sc]; ok && st == connectivity.Ready {
-				readySCs = append(readySCs, sc)
-			}
-		}
-	}
-
-	if len(lb.fullServerList) <= 0 {
-		if len(readySCs) <= 0 {
-			lb.picker = &errPicker{err: balancer.ErrNoSubConnAvailable}
-			return
-		}
-		lb.picker = &rrPicker{subConns: readySCs}
-		return
-	}
-	lb.picker = &lbPicker{
-		serverList: lb.fullServerList,
-		subConns:   readySCs,
-		stats:      lb.clientStats,
-	}
-}
-
-func (lb *lbBalancer) HandleSubConnStateChange(sc balancer.SubConn, s connectivity.State) {
-	grpclog.Infof("lbBalancer: handle SubConn state change: %p, %v", sc, s)
-	lb.mu.Lock()
-	defer lb.mu.Unlock()
-
-	oldS, ok := lb.scStates[sc]
-	if !ok {
-		grpclog.Infof("lbBalancer: got state changes for an unknown SubConn: %p, %v", sc, s)
-		return
-	}
-	lb.scStates[sc] = s
-	switch s {
-	case connectivity.Idle:
-		sc.Connect()
-	case connectivity.Shutdown:
-		// When an address was removed by resolver, b called RemoveSubConn but
-		// kept the sc's state in scStates. Remove state for this sc here.
-		delete(lb.scStates, sc)
-	}
-
-	oldAggrState := lb.state
-	lb.state = lb.csEvltr.recordTransition(oldS, s)
-
-	// Regenerate picker when one of the following happens:
-	//  - this sc became ready from not-ready
-	//  - this sc became not-ready from ready
-	//  - the aggregated state of balancer became TransientFailure from non-TransientFailure
-	//  - the aggregated state of balancer became non-TransientFailure from TransientFailure
-	if (oldS == connectivity.Ready) != (s == connectivity.Ready) ||
-		(lb.state == connectivity.TransientFailure) != (oldAggrState == connectivity.TransientFailure) {
-		lb.regeneratePicker()
-	}
-
-	lb.cc.UpdateBalancerState(lb.state, lb.picker)
-}
-
-// fallbackToBackendsAfter blocks for fallbackTimeout and falls back to use
-// resolved backends (backends received from resolver, not from remote balancer)
-// if no connection to remote balancers was successful.
-func (lb *lbBalancer) fallbackToBackendsAfter(fallbackTimeout time.Duration) {
-	timer := time.NewTimer(fallbackTimeout)
-	defer timer.Stop()
-	select {
-	case <-timer.C:
-	case <-lb.doneCh:
-		return
-	}
-	lb.mu.Lock()
-	if lb.serverListReceived {
-		lb.mu.Unlock()
-		return
-	}
-	lb.fallbackTimerExpired = true
-	lb.refreshSubConns(lb.resolvedBackendAddrs)
-	lb.mu.Unlock()
-}
-
-// HandleResolvedAddrs sends the updated remoteLB addresses to remoteLB
-// clientConn. The remoteLB clientConn will handle creating/removing remoteLB
-// connections.
-func (lb *lbBalancer) HandleResolvedAddrs(addrs []resolver.Address, err error) {
-	grpclog.Infof("lbBalancer: handleResolvedResult: %+v", addrs)
-	if len(addrs) <= 0 {
-		return
-	}
-
-	var remoteBalancerAddrs, backendAddrs []resolver.Address
-	for _, a := range addrs {
-		if a.Type == resolver.GRPCLB {
-			remoteBalancerAddrs = append(remoteBalancerAddrs, a)
-		} else {
-			backendAddrs = append(backendAddrs, a)
-		}
-	}
-
-	if lb.ccRemoteLB == nil {
-		if len(remoteBalancerAddrs) <= 0 {
-			grpclog.Errorf("grpclb: no remote balancer address is available, should never happen")
-			return
-		}
-		// First time receiving resolved addresses, create a cc to remote
-		// balancers.
-		lb.dialRemoteLB(remoteBalancerAddrs[0].ServerName)
-		// Start the fallback goroutine.
-		go lb.fallbackToBackendsAfter(lb.fallbackTimeout)
-	}
-
-	// cc to remote balancers uses lb.manualResolver. Send the updated remote
-	// balancer addresses to it through manualResolver.
-	lb.manualResolver.NewAddress(remoteBalancerAddrs)
-
-	lb.mu.Lock()
-	lb.resolvedBackendAddrs = backendAddrs
-	// If serverListReceived is true, connection to remote balancer was
-	// successful and there's no need to do fallback anymore.
-	// If fallbackTimerExpired is false, fallback hasn't happened yet.
-	if !lb.serverListReceived && lb.fallbackTimerExpired {
-		// This means we received a new list of resolved backends, and we are
-		// still in fallback mode. Need to update the list of backends we are
-		// using to the new list of backends.
-		lb.refreshSubConns(lb.resolvedBackendAddrs)
-	}
-	lb.mu.Unlock()
-}
-
-func (lb *lbBalancer) Close() {
-	select {
-	case <-lb.doneCh:
-		return
-	default:
-	}
-	close(lb.doneCh)
-	if lb.ccRemoteLB != nil {
-		lb.ccRemoteLB.Close()
-	}
-	lb.cc.close()
-}

vendor/google.golang.org/grpc/grpclb/grpc_lb_v1/messages/messages.pb.go

@@ -1,799 +0,0 @@
-// Code generated by protoc-gen-go. DO NOT EDIT.
-// source: grpc_lb_v1/messages/messages.proto
-
-package messages // import "google.golang.org/grpc/grpclb/grpc_lb_v1/messages"
-
-import proto "github.com/golang/protobuf/proto"
-import fmt "fmt"
-import math "math"
-
-// Reference imports to suppress errors if they are not otherwise used.
-var _ = proto.Marshal
-var _ = fmt.Errorf
-var _ = math.Inf
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the proto package it is being compiled against.
-// A compilation error at this line likely means your copy of the
-// proto package needs to be updated.
-const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
-
-type Duration struct {
-	// Signed seconds of the span of time. Must be from -315,576,000,000
-	// to +315,576,000,000 inclusive.
-	Seconds int64 `protobuf:"varint,1,opt,name=seconds" json:"seconds,omitempty"`
-	// Signed fractions of a second at nanosecond resolution of the span
-	// of time. Durations less than one second are represented with a 0
-	// `seconds` field and a positive or negative `nanos` field. For durations
-	// of one second or more, a non-zero value for the `nanos` field must be
-	// of the same sign as the `seconds` field. Must be from -999,999,999
-	// to +999,999,999 inclusive.
-	Nanos                int32    `protobuf:"varint,2,opt,name=nanos" json:"nanos,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *Duration) Reset()         { *m = Duration{} }
-func (m *Duration) String() string { return proto.CompactTextString(m) }
-func (*Duration) ProtoMessage()    {}
-func (*Duration) Descriptor() ([]byte, []int) {
-	return fileDescriptor_messages_b81c731f0e83edbd, []int{0}
-}
-func (m *Duration) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_Duration.Unmarshal(m, b)
-}
-func (m *Duration) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_Duration.Marshal(b, m, deterministic)
-}
-func (dst *Duration) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_Duration.Merge(dst, src)
-}
-func (m *Duration) XXX_Size() int {
-	return xxx_messageInfo_Duration.Size(m)
-}
-func (m *Duration) XXX_DiscardUnknown() {
-	xxx_messageInfo_Duration.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_Duration proto.InternalMessageInfo
-
-func (m *Duration) GetSeconds() int64 {
-	if m != nil {
-		return m.Seconds
-	}
-	return 0
-}
-
-func (m *Duration) GetNanos() int32 {
-	if m != nil {
-		return m.Nanos
-	}
-	return 0
-}
-
-type Timestamp struct {
-	// Represents seconds of UTC time since Unix epoch
-	// 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
-	// 9999-12-31T23:59:59Z inclusive.
-	Seconds int64 `protobuf:"varint,1,opt,name=seconds" json:"seconds,omitempty"`
-	// Non-negative fractions of a second at nanosecond resolution. Negative
-	// second values with fractions must still have non-negative nanos values
-	// that count forward in time. Must be from 0 to 999,999,999
-	// inclusive.
-	Nanos                int32    `protobuf:"varint,2,opt,name=nanos" json:"nanos,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *Timestamp) Reset()         { *m = Timestamp{} }
-func (m *Timestamp) String() string { return proto.CompactTextString(m) }
-func (*Timestamp) ProtoMessage()    {}
-func (*Timestamp) Descriptor() ([]byte, []int) {
-	return fileDescriptor_messages_b81c731f0e83edbd, []int{1}
-}
-func (m *Timestamp) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_Timestamp.Unmarshal(m, b)
-}
-func (m *Timestamp) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_Timestamp.Marshal(b, m, deterministic)
-}
-func (dst *Timestamp) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_Timestamp.Merge(dst, src)
-}
-func (m *Timestamp) XXX_Size() int {
-	return xxx_messageInfo_Timestamp.Size(m)
-}
-func (m *Timestamp) XXX_DiscardUnknown() {
-	xxx_messageInfo_Timestamp.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_Timestamp proto.InternalMessageInfo
-
-func (m *Timestamp) GetSeconds() int64 {
-	if m != nil {
-		return m.Seconds
-	}
-	return 0
-}
-
-func (m *Timestamp) GetNanos() int32 {
-	if m != nil {
-		return m.Nanos
-	}
-	return 0
-}
-
-type LoadBalanceRequest struct {
-	// Types that are valid to be assigned to LoadBalanceRequestType:
-	//	*LoadBalanceRequest_InitialRequest
-	//	*LoadBalanceRequest_ClientStats
-	LoadBalanceRequestType isLoadBalanceRequest_LoadBalanceRequestType `protobuf_oneof:"load_balance_request_type"`
-	XXX_NoUnkeyedLiteral   struct{}                                    `json:"-"`
-	XXX_unrecognized       []byte                                      `json:"-"`
-	XXX_sizecache          int32                                       `json:"-"`
-}
-
-func (m *LoadBalanceRequest) Reset()         { *m = LoadBalanceRequest{} }
-func (m *LoadBalanceRequest) String() string { return proto.CompactTextString(m) }
-func (*LoadBalanceRequest) ProtoMessage()    {}
-func (*LoadBalanceRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_messages_b81c731f0e83edbd, []int{2}
-}
-func (m *LoadBalanceRequest) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_LoadBalanceRequest.Unmarshal(m, b)
-}
-func (m *LoadBalanceRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_LoadBalanceRequest.Marshal(b, m, deterministic)
-}
-func (dst *LoadBalanceRequest) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_LoadBalanceRequest.Merge(dst, src)
-}
-func (m *LoadBalanceRequest) XXX_Size() int {
-	return xxx_messageInfo_LoadBalanceRequest.Size(m)
-}
-func (m *LoadBalanceRequest) XXX_DiscardUnknown() {
-	xxx_messageInfo_LoadBalanceRequest.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_LoadBalanceRequest proto.InternalMessageInfo
-
-type isLoadBalanceRequest_LoadBalanceRequestType interface {
-	isLoadBalanceRequest_LoadBalanceRequestType()
-}
-
-type LoadBalanceRequest_InitialRequest struct {
-	InitialRequest *InitialLoadBalanceRequest `protobuf:"bytes,1,opt,name=initial_request,json=initialRequest,oneof"`
-}
-type LoadBalanceRequest_ClientStats struct {
-	ClientStats *ClientStats `protobuf:"bytes,2,opt,name=client_stats,json=clientStats,oneof"`
-}
-
-func (*LoadBalanceRequest_InitialRequest) isLoadBalanceRequest_LoadBalanceRequestType() {}
-func (*LoadBalanceRequest_ClientStats) isLoadBalanceRequest_LoadBalanceRequestType()    {}
-
-func (m *LoadBalanceRequest) GetLoadBalanceRequestType() isLoadBalanceRequest_LoadBalanceRequestType {
-	if m != nil {
-		return m.LoadBalanceRequestType
-	}
-	return nil
-}
-
-func (m *LoadBalanceRequest) GetInitialRequest() *InitialLoadBalanceRequest {
-	if x, ok := m.GetLoadBalanceRequestType().(*LoadBalanceRequest_InitialRequest); ok {
-		return x.InitialRequest
-	}
-	return nil
-}
-
-func (m *LoadBalanceRequest) GetClientStats() *ClientStats {
-	if x, ok := m.GetLoadBalanceRequestType().(*LoadBalanceRequest_ClientStats); ok {
-		return x.ClientStats
-	}
-	return nil
-}
-
-// XXX_OneofFuncs is for the internal use of the proto package.
-func (*LoadBalanceRequest) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
-	return _LoadBalanceRequest_OneofMarshaler, _LoadBalanceRequest_OneofUnmarshaler, _LoadBalanceRequest_OneofSizer, []interface{}{
-		(*LoadBalanceRequest_InitialRequest)(nil),
-		(*LoadBalanceRequest_ClientStats)(nil),
-	}
-}
-
-func _LoadBalanceRequest_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
-	m := msg.(*LoadBalanceRequest)
-	// load_balance_request_type
-	switch x := m.LoadBalanceRequestType.(type) {
-	case *LoadBalanceRequest_InitialRequest:
-		b.EncodeVarint(1<<3 | proto.WireBytes)
-		if err := b.EncodeMessage(x.InitialRequest); err != nil {
-			return err
-		}
-	case *LoadBalanceRequest_ClientStats:
-		b.EncodeVarint(2<<3 | proto.WireBytes)
-		if err := b.EncodeMessage(x.ClientStats); err != nil {
-			return err
-		}
-	case nil:
-	default:
-		return fmt.Errorf("LoadBalanceRequest.LoadBalanceRequestType has unexpected type %T", x)
-	}
-	return nil
-}
-
-func _LoadBalanceRequest_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
-	m := msg.(*LoadBalanceRequest)
-	switch tag {
-	case 1: // load_balance_request_type.initial_request
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		msg := new(InitialLoadBalanceRequest)
-		err := b.DecodeMessage(msg)
-		m.LoadBalanceRequestType = &LoadBalanceRequest_InitialRequest{msg}
-		return true, err
-	case 2: // load_balance_request_type.client_stats
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		msg := new(ClientStats)
-		err := b.DecodeMessage(msg)
-		m.LoadBalanceRequestType = &LoadBalanceRequest_ClientStats{msg}
-		return true, err
-	default:
-		return false, nil
-	}
-}
-
-func _LoadBalanceRequest_OneofSizer(msg proto.Message) (n int) {
-	m := msg.(*LoadBalanceRequest)
-	// load_balance_request_type
-	switch x := m.LoadBalanceRequestType.(type) {
-	case *LoadBalanceRequest_InitialRequest:
-		s := proto.Size(x.InitialRequest)
-		n += 1 // tag and wire
-		n += proto.SizeVarint(uint64(s))
-		n += s
-	case *LoadBalanceRequest_ClientStats:
-		s := proto.Size(x.ClientStats)
-		n += 1 // tag and wire
-		n += proto.SizeVarint(uint64(s))
-		n += s
-	case nil:
-	default:
-		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
-	}
-	return n
-}
-
-type InitialLoadBalanceRequest struct {
-	// Name of load balanced service (IE, balancer.service.com)
-	// length should be less than 256 bytes.
-	Name                 string   `protobuf:"bytes,1,opt,name=name" json:"name,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *InitialLoadBalanceRequest) Reset()         { *m = InitialLoadBalanceRequest{} }
-func (m *InitialLoadBalanceRequest) String() string { return proto.CompactTextString(m) }
-func (*InitialLoadBalanceRequest) ProtoMessage()    {}
-func (*InitialLoadBalanceRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_messages_b81c731f0e83edbd, []int{3}
-}
-func (m *InitialLoadBalanceRequest) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_InitialLoadBalanceRequest.Unmarshal(m, b)
-}
-func (m *InitialLoadBalanceRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_InitialLoadBalanceRequest.Marshal(b, m, deterministic)
-}
-func (dst *InitialLoadBalanceRequest) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_InitialLoadBalanceRequest.Merge(dst, src)
-}
-func (m *InitialLoadBalanceRequest) XXX_Size() int {
-	return xxx_messageInfo_InitialLoadBalanceRequest.Size(m)
-}
-func (m *InitialLoadBalanceRequest) XXX_DiscardUnknown() {
-	xxx_messageInfo_InitialLoadBalanceRequest.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_InitialLoadBalanceRequest proto.InternalMessageInfo
-
-func (m *InitialLoadBalanceRequest) GetName() string {
-	if m != nil {
-		return m.Name
-	}
-	return ""
-}
-
-// Contains client level statistics that are useful to load balancing. Each
-// count except the timestamp should be reset to zero after reporting the stats.
-type ClientStats struct {
-	// The timestamp of generating the report.
-	Timestamp *Timestamp `protobuf:"bytes,1,opt,name=timestamp" json:"timestamp,omitempty"`
-	// The total number of RPCs that started.
-	NumCallsStarted int64 `protobuf:"varint,2,opt,name=num_calls_started,json=numCallsStarted" json:"num_calls_started,omitempty"`
-	// The total number of RPCs that finished.
-	NumCallsFinished int64 `protobuf:"varint,3,opt,name=num_calls_finished,json=numCallsFinished" json:"num_calls_finished,omitempty"`
-	// The total number of RPCs that were dropped by the client because of rate
-	// limiting.
-	NumCallsFinishedWithDropForRateLimiting int64 `protobuf:"varint,4,opt,name=num_calls_finished_with_drop_for_rate_limiting,json=numCallsFinishedWithDropForRateLimiting" json:"num_calls_finished_with_drop_for_rate_limiting,omitempty"`
-	// The total number of RPCs that were dropped by the client because of load
-	// balancing.
-	NumCallsFinishedWithDropForLoadBalancing int64 `protobuf:"varint,5,opt,name=num_calls_finished_with_drop_for_load_balancing,json=numCallsFinishedWithDropForLoadBalancing" json:"num_calls_finished_with_drop_for_load_balancing,omitempty"`
-	// The total number of RPCs that failed to reach a server except dropped RPCs.
-	NumCallsFinishedWithClientFailedToSend int64 `protobuf:"varint,6,opt,name=num_calls_finished_with_client_failed_to_send,json=numCallsFinishedWithClientFailedToSend" json:"num_calls_finished_with_client_failed_to_send,omitempty"`
-	// The total number of RPCs that finished and are known to have been received
-	// by a server.
-	NumCallsFinishedKnownReceived int64    `protobuf:"varint,7,opt,name=num_calls_finished_known_received,json=numCallsFinishedKnownReceived" json:"num_calls_finished_known_received,omitempty"`
-	XXX_NoUnkeyedLiteral          struct{} `json:"-"`
-	XXX_unrecognized              []byte   `json:"-"`
-	XXX_sizecache                 int32    `json:"-"`
-}
-
-func (m *ClientStats) Reset()         { *m = ClientStats{} }
-func (m *ClientStats) String() string { return proto.CompactTextString(m) }
-func (*ClientStats) ProtoMessage()    {}
-func (*ClientStats) Descriptor() ([]byte, []int) {
-	return fileDescriptor_messages_b81c731f0e83edbd, []int{4}
-}
-func (m *ClientStats) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_ClientStats.Unmarshal(m, b)
-}
-func (m *ClientStats) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_ClientStats.Marshal(b, m, deterministic)
-}
-func (dst *ClientStats) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_ClientStats.Merge(dst, src)
-}
-func (m *ClientStats) XXX_Size() int {
-	return xxx_messageInfo_ClientStats.Size(m)
-}
-func (m *ClientStats) XXX_DiscardUnknown() {
-	xxx_messageInfo_ClientStats.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_ClientStats proto.InternalMessageInfo
-
-func (m *ClientStats) GetTimestamp() *Timestamp {
-	if m != nil {
-		return m.Timestamp
-	}
-	return nil
-}
-
-func (m *ClientStats) GetNumCallsStarted() int64 {
-	if m != nil {
-		return m.NumCallsStarted
-	}
-	return 0
-}
-
-func (m *ClientStats) GetNumCallsFinished() int64 {
-	if m != nil {
-		return m.NumCallsFinished
-	}
-	return 0
-}
-
-func (m *ClientStats) GetNumCallsFinishedWithDropForRateLimiting() int64 {
-	if m != nil {
-		return m.NumCallsFinishedWithDropForRateLimiting
-	}
-	return 0
-}
-
-func (m *ClientStats) GetNumCallsFinishedWithDropForLoadBalancing() int64 {
-	if m != nil {
-		return m.NumCallsFinishedWithDropForLoadBalancing
-	}
-	return 0
-}
-
-func (m *ClientStats) GetNumCallsFinishedWithClientFailedToSend() int64 {
-	if m != nil {
-		return m.NumCallsFinishedWithClientFailedToSend
-	}
-	return 0
-}
-
-func (m *ClientStats) GetNumCallsFinishedKnownReceived() int64 {
-	if m != nil {
-		return m.NumCallsFinishedKnownReceived
-	}
-	return 0
-}
-
-type LoadBalanceResponse struct {
-	// Types that are valid to be assigned to LoadBalanceResponseType:
-	//	*LoadBalanceResponse_InitialResponse
-	//	*LoadBalanceResponse_ServerList
-	LoadBalanceResponseType isLoadBalanceResponse_LoadBalanceResponseType `protobuf_oneof:"load_balance_response_type"`
-	XXX_NoUnkeyedLiteral    struct{}                                      `json:"-"`
-	XXX_unrecognized        []byte                                        `json:"-"`
-	XXX_sizecache           int32                                         `json:"-"`
-}
-
-func (m *LoadBalanceResponse) Reset()         { *m = LoadBalanceResponse{} }
-func (m *LoadBalanceResponse) String() string { return proto.CompactTextString(m) }
-func (*LoadBalanceResponse) ProtoMessage()    {}
-func (*LoadBalanceResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_messages_b81c731f0e83edbd, []int{5}
-}
-func (m *LoadBalanceResponse) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_LoadBalanceResponse.Unmarshal(m, b)
-}
-func (m *LoadBalanceResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_LoadBalanceResponse.Marshal(b, m, deterministic)
-}
-func (dst *LoadBalanceResponse) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_LoadBalanceResponse.Merge(dst, src)
-}
-func (m *LoadBalanceResponse) XXX_Size() int {
-	return xxx_messageInfo_LoadBalanceResponse.Size(m)
-}
-func (m *LoadBalanceResponse) XXX_DiscardUnknown() {
-	xxx_messageInfo_LoadBalanceResponse.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_LoadBalanceResponse proto.InternalMessageInfo
-
-type isLoadBalanceResponse_LoadBalanceResponseType interface {
-	isLoadBalanceResponse_LoadBalanceResponseType()
-}
-
-type LoadBalanceResponse_InitialResponse struct {
-	InitialResponse *InitialLoadBalanceResponse `protobuf:"bytes,1,opt,name=initial_response,json=initialResponse,oneof"`
-}
-type LoadBalanceResponse_ServerList struct {
-	ServerList *ServerList `protobuf:"bytes,2,opt,name=server_list,json=serverList,oneof"`
-}
-
-func (*LoadBalanceResponse_InitialResponse) isLoadBalanceResponse_LoadBalanceResponseType() {}
-func (*LoadBalanceResponse_ServerList) isLoadBalanceResponse_LoadBalanceResponseType()      {}
-
-func (m *LoadBalanceResponse) GetLoadBalanceResponseType() isLoadBalanceResponse_LoadBalanceResponseType {
-	if m != nil {
-		return m.LoadBalanceResponseType
-	}
-	return nil
-}
-
-func (m *LoadBalanceResponse) GetInitialResponse() *InitialLoadBalanceResponse {
-	if x, ok := m.GetLoadBalanceResponseType().(*LoadBalanceResponse_InitialResponse); ok {
-		return x.InitialResponse
-	}
-	return nil
-}
-
-func (m *LoadBalanceResponse) GetServerList() *ServerList {
-	if x, ok := m.GetLoadBalanceResponseType().(*LoadBalanceResponse_ServerList); ok {
-		return x.ServerList
-	}
-	return nil
-}
-
-// XXX_OneofFuncs is for the internal use of the proto package.
-func (*LoadBalanceResponse) XXX_OneofFuncs() (func(msg proto.Message, b *proto.Buffer) error, func(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error), func(msg proto.Message) (n int), []interface{}) {
-	return _LoadBalanceResponse_OneofMarshaler, _LoadBalanceResponse_OneofUnmarshaler, _LoadBalanceResponse_OneofSizer, []interface{}{
-		(*LoadBalanceResponse_InitialResponse)(nil),
-		(*LoadBalanceResponse_ServerList)(nil),
-	}
-}
-
-func _LoadBalanceResponse_OneofMarshaler(msg proto.Message, b *proto.Buffer) error {
-	m := msg.(*LoadBalanceResponse)
-	// load_balance_response_type
-	switch x := m.LoadBalanceResponseType.(type) {
-	case *LoadBalanceResponse_InitialResponse:
-		b.EncodeVarint(1<<3 | proto.WireBytes)
-		if err := b.EncodeMessage(x.InitialResponse); err != nil {
-			return err
-		}
-	case *LoadBalanceResponse_ServerList:
-		b.EncodeVarint(2<<3 | proto.WireBytes)
-		if err := b.EncodeMessage(x.ServerList); err != nil {
-			return err
-		}
-	case nil:
-	default:
-		return fmt.Errorf("LoadBalanceResponse.LoadBalanceResponseType has unexpected type %T", x)
-	}
-	return nil
-}
-
-func _LoadBalanceResponse_OneofUnmarshaler(msg proto.Message, tag, wire int, b *proto.Buffer) (bool, error) {
-	m := msg.(*LoadBalanceResponse)
-	switch tag {
-	case 1: // load_balance_response_type.initial_response
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		msg := new(InitialLoadBalanceResponse)
-		err := b.DecodeMessage(msg)
-		m.LoadBalanceResponseType = &LoadBalanceResponse_InitialResponse{msg}
-		return true, err
-	case 2: // load_balance_response_type.server_list
-		if wire != proto.WireBytes {
-			return true, proto.ErrInternalBadWireType
-		}
-		msg := new(ServerList)
-		err := b.DecodeMessage(msg)
-		m.LoadBalanceResponseType = &LoadBalanceResponse_ServerList{msg}
-		return true, err
-	default:
-		return false, nil
-	}
-}
-
-func _LoadBalanceResponse_OneofSizer(msg proto.Message) (n int) {
-	m := msg.(*LoadBalanceResponse)
-	// load_balance_response_type
-	switch x := m.LoadBalanceResponseType.(type) {
-	case *LoadBalanceResponse_InitialResponse:
-		s := proto.Size(x.InitialResponse)
-		n += 1 // tag and wire
-		n += proto.SizeVarint(uint64(s))
-		n += s
-	case *LoadBalanceResponse_ServerList:
-		s := proto.Size(x.ServerList)
-		n += 1 // tag and wire
-		n += proto.SizeVarint(uint64(s))
-		n += s
-	case nil:
-	default:
-		panic(fmt.Sprintf("proto: unexpected type %T in oneof", x))
-	}
-	return n
-}
-
-type InitialLoadBalanceResponse struct {
-	// This is an application layer redirect that indicates the client should use
-	// the specified server for load balancing. When this field is non-empty in
-	// the response, the client should open a separate connection to the
-	// load_balancer_delegate and call the BalanceLoad method. Its length should
-	// be less than 64 bytes.
-	LoadBalancerDelegate string `protobuf:"bytes,1,opt,name=load_balancer_delegate,json=loadBalancerDelegate" json:"load_balancer_delegate,omitempty"`
-	// This interval defines how often the client should send the client stats
-	// to the load balancer. Stats should only be reported when the duration is
-	// positive.
-	ClientStatsReportInterval *Duration `protobuf:"bytes,2,opt,name=client_stats_report_interval,json=clientStatsReportInterval" json:"client_stats_report_interval,omitempty"`
-	XXX_NoUnkeyedLiteral      struct{}  `json:"-"`
-	XXX_unrecognized          []byte    `json:"-"`
-	XXX_sizecache             int32     `json:"-"`
-}
-
-func (m *InitialLoadBalanceResponse) Reset()         { *m = InitialLoadBalanceResponse{} }
-func (m *InitialLoadBalanceResponse) String() string { return proto.CompactTextString(m) }
-func (*InitialLoadBalanceResponse) ProtoMessage()    {}
-func (*InitialLoadBalanceResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_messages_b81c731f0e83edbd, []int{6}
-}
-func (m *InitialLoadBalanceResponse) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_InitialLoadBalanceResponse.Unmarshal(m, b)
-}
-func (m *InitialLoadBalanceResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_InitialLoadBalanceResponse.Marshal(b, m, deterministic)
-}
-func (dst *InitialLoadBalanceResponse) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_InitialLoadBalanceResponse.Merge(dst, src)
-}
-func (m *InitialLoadBalanceResponse) XXX_Size() int {
-	return xxx_messageInfo_InitialLoadBalanceResponse.Size(m)
-}
-func (m *InitialLoadBalanceResponse) XXX_DiscardUnknown() {
-	xxx_messageInfo_InitialLoadBalanceResponse.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_InitialLoadBalanceResponse proto.InternalMessageInfo
-
-func (m *InitialLoadBalanceResponse) GetLoadBalancerDelegate() string {
-	if m != nil {
-		return m.LoadBalancerDelegate
-	}
-	return ""
-}
-
-func (m *InitialLoadBalanceResponse) GetClientStatsReportInterval() *Duration {
-	if m != nil {
-		return m.ClientStatsReportInterval
-	}
-	return nil
-}
-
-type ServerList struct {
-	// Contains a list of servers selected by the load balancer. The list will
-	// be updated when server resolutions change or as needed to balance load
-	// across more servers. The client should consume the server list in order
-	// unless instructed otherwise via the client_config.
-	Servers              []*Server `protobuf:"bytes,1,rep,name=servers" json:"servers,omitempty"`
-	XXX_NoUnkeyedLiteral struct{}  `json:"-"`
-	XXX_unrecognized     []byte    `json:"-"`
-	XXX_sizecache        int32     `json:"-"`
-}
-
-func (m *ServerList) Reset()         { *m = ServerList{} }
-func (m *ServerList) String() string { return proto.CompactTextString(m) }
-func (*ServerList) ProtoMessage()    {}
-func (*ServerList) Descriptor() ([]byte, []int) {
-	return fileDescriptor_messages_b81c731f0e83edbd, []int{7}
-}
-func (m *ServerList) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_ServerList.Unmarshal(m, b)
-}
-func (m *ServerList) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_ServerList.Marshal(b, m, deterministic)
-}
-func (dst *ServerList) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_ServerList.Merge(dst, src)
-}
-func (m *ServerList) XXX_Size() int {
-	return xxx_messageInfo_ServerList.Size(m)
-}
-func (m *ServerList) XXX_DiscardUnknown() {
-	xxx_messageInfo_ServerList.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_ServerList proto.InternalMessageInfo
-
-func (m *ServerList) GetServers() []*Server {
-	if m != nil {
-		return m.Servers
-	}
-	return nil
-}
-
-// Contains server information. When none of the [drop_for_*] fields are true,
-// use the other fields. When drop_for_rate_limiting is true, ignore all other
-// fields. Use drop_for_load_balancing only when it is true and
-// drop_for_rate_limiting is false.
-type Server struct {
-	// A resolved address for the server, serialized in network-byte-order. It may
-	// either be an IPv4 or IPv6 address.
-	IpAddress []byte `protobuf:"bytes,1,opt,name=ip_address,json=ipAddress,proto3" json:"ip_address,omitempty"`
-	// A resolved port number for the server.
-	Port int32 `protobuf:"varint,2,opt,name=port" json:"port,omitempty"`
-	// An opaque but printable token given to the frontend for each pick. All
-	// frontend requests for that pick must include the token in its initial
-	// metadata. The token is used by the backend to verify the request and to
-	// allow the backend to report load to the gRPC LB system.
-	//
-	// Its length is variable but less than 50 bytes.
-	LoadBalanceToken string `protobuf:"bytes,3,opt,name=load_balance_token,json=loadBalanceToken" json:"load_balance_token,omitempty"`
-	// Indicates whether this particular request should be dropped by the client
-	// for rate limiting.
-	DropForRateLimiting bool `protobuf:"varint,4,opt,name=drop_for_rate_limiting,json=dropForRateLimiting" json:"drop_for_rate_limiting,omitempty"`
-	// Indicates whether this particular request should be dropped by the client
-	// for load balancing.
-	DropForLoadBalancing bool     `protobuf:"varint,5,opt,name=drop_for_load_balancing,json=dropForLoadBalancing" json:"drop_for_load_balancing,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *Server) Reset()         { *m = Server{} }
-func (m *Server) String() string { return proto.CompactTextString(m) }
-func (*Server) ProtoMessage()    {}
-func (*Server) Descriptor() ([]byte, []int) {
-	return fileDescriptor_messages_b81c731f0e83edbd, []int{8}
-}
-func (m *Server) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_Server.Unmarshal(m, b)
-}
-func (m *Server) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_Server.Marshal(b, m, deterministic)
-}
-func (dst *Server) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_Server.Merge(dst, src)
-}
-func (m *Server) XXX_Size() int {
-	return xxx_messageInfo_Server.Size(m)
-}
-func (m *Server) XXX_DiscardUnknown() {
-	xxx_messageInfo_Server.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_Server proto.InternalMessageInfo
-
-func (m *Server) GetIpAddress() []byte {
-	if m != nil {
-		return m.IpAddress
-	}
-	return nil
-}
-
-func (m *Server) GetPort() int32 {
-	if m != nil {
-		return m.Port
-	}
-	return 0
-}
-
-func (m *Server) GetLoadBalanceToken() string {
-	if m != nil {
-		return m.LoadBalanceToken
-	}
-	return ""
-}
-
-func (m *Server) GetDropForRateLimiting() bool {
-	if m != nil {
-		return m.DropForRateLimiting
-	}
-	return false
-}
-
-func (m *Server) GetDropForLoadBalancing() bool {
-	if m != nil {
-		return m.DropForLoadBalancing
-	}
-	return false
-}
-
-func init() {
-	proto.RegisterType((*Duration)(nil), "grpc.lb.v1.Duration")
-	proto.RegisterType((*Timestamp)(nil), "grpc.lb.v1.Timestamp")
-	proto.RegisterType((*LoadBalanceRequest)(nil), "grpc.lb.v1.LoadBalanceRequest")
-	proto.RegisterType((*InitialLoadBalanceRequest)(nil), "grpc.lb.v1.InitialLoadBalanceRequest")
-	proto.RegisterType((*ClientStats)(nil), "grpc.lb.v1.ClientStats")
-	proto.RegisterType((*LoadBalanceResponse)(nil), "grpc.lb.v1.LoadBalanceResponse")
-	proto.RegisterType((*InitialLoadBalanceResponse)(nil), "grpc.lb.v1.InitialLoadBalanceResponse")
-	proto.RegisterType((*ServerList)(nil), "grpc.lb.v1.ServerList")
-	proto.RegisterType((*Server)(nil), "grpc.lb.v1.Server")
-}
-
-func init() {
-	proto.RegisterFile("grpc_lb_v1/messages/messages.proto", fileDescriptor_messages_b81c731f0e83edbd)
-}
-
-var fileDescriptor_messages_b81c731f0e83edbd = []byte{
-	// 731 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x94, 0x55, 0xdd, 0x4e, 0x1b, 0x39,
-	0x14, 0x26, 0x9b, 0x00, 0xc9, 0x09, 0x5a, 0xb2, 0x26, 0x0b, 0x81, 0x05, 0x89, 0x1d, 0x69, 0xd9,
-	0x68, 0xc5, 0x4e, 0x04, 0xd9, 0xbd, 0xe8, 0xcf, 0x45, 0x1b, 0x10, 0x0a, 0x2d, 0x17, 0x95, 0x43,
-	0x55, 0xa9, 0x52, 0x65, 0x39, 0x19, 0x33, 0x58, 0x38, 0xf6, 0xd4, 0x76, 0x82, 0xfa, 0x08, 0x7d,
-	0x94, 0x3e, 0x46, 0xd5, 0x67, 0xe8, 0xfb, 0x54, 0xe3, 0x99, 0xc9, 0x0c, 0x10, 0x40, 0xbd, 0x89,
-	0xec, 0xe3, 0xef, 0x7c, 0xdf, 0xf1, 0x89, 0xbf, 0x33, 0xe0, 0x85, 0x3a, 0x1a, 0x11, 0x31, 0x24,
-	0xd3, 0x83, 0xce, 0x98, 0x19, 0x43, 0x43, 0x66, 0x66, 0x0b, 0x3f, 0xd2, 0xca, 0x2a, 0x04, 0x31,
-	0xc6, 0x17, 0x43, 0x7f, 0x7a, 0xe0, 0x3d, 0x85, 0xea, 0xf1, 0x44, 0x53, 0xcb, 0x95, 0x44, 0x2d,
-	0x58, 0x36, 0x6c, 0xa4, 0x64, 0x60, 0x5a, 0xa5, 0xdd, 0x52, 0xbb, 0x8c, 0xb3, 0x2d, 0x6a, 0xc2,
-	0xa2, 0xa4, 0x52, 0x99, 0xd6, 0x2f, 0xbb, 0xa5, 0xf6, 0x22, 0x4e, 0x36, 0xde, 0x33, 0xa8, 0x9d,
-	0xf3, 0x31, 0x33, 0x96, 0x8e, 0xa3, 0x9f, 0x4e, 0xfe, 0x5a, 0x02, 0x74, 0xa6, 0x68, 0xd0, 0xa3,
-	0x82, 0xca, 0x11, 0xc3, 0xec, 0xe3, 0x84, 0x19, 0x8b, 0xde, 0xc0, 0x2a, 0x97, 0xdc, 0x72, 0x2a,
-	0x88, 0x4e, 0x42, 0x8e, 0xae, 0x7e, 0xf8, 0x97, 0x9f, 0x57, 0xed, 0x9f, 0x26, 0x90, 0xbb, 0xf9,
-	0xfd, 0x05, 0xfc, 0x6b, 0x9a, 0x9f, 0x31, 0x3e, 0x87, 0x95, 0x91, 0xe0, 0x4c, 0x5a, 0x62, 0x2c,
-	0xb5, 0x49, 0x15, 0xf5, 0xc3, 0x8d, 0x22, 0xdd, 0x91, 0x3b, 0x1f, 0xc4, 0xc7, 0xfd, 0x05, 0x5c,
-	0x1f, 0xe5, 0xdb, 0xde, 0x1f, 0xb0, 0x29, 0x14, 0x0d, 0xc8, 0x30, 0x91, 0xc9, 0x8a, 0x22, 0xf6,
-	0x53, 0xc4, 0xbc, 0x0e, 0x6c, 0xde, 0x5b, 0x09, 0x42, 0x50, 0x91, 0x74, 0xcc, 0x5c, 0xf9, 0x35,
-	0xec, 0xd6, 0xde, 0xe7, 0x0a, 0xd4, 0x0b, 0x62, 0xa8, 0x0b, 0x35, 0x9b, 0x75, 0x30, 0xbd, 0xe7,
-	0xef, 0xc5, 0xc2, 0x66, 0xed, 0xc5, 0x39, 0x0e, 0xfd, 0x03, 0xbf, 0xc9, 0xc9, 0x98, 0x8c, 0xa8,
-	0x10, 0x26, 0xbe, 0x93, 0xb6, 0x2c, 0x70, 0xb7, 0x2a, 0xe3, 0x55, 0x39, 0x19, 0x1f, 0xc5, 0xf1,
-	0x41, 0x12, 0x46, 0xfb, 0x80, 0x72, 0xec, 0x05, 0x97, 0xdc, 0x5c, 0xb2, 0xa0, 0x55, 0x76, 0xe0,
-	0x46, 0x06, 0x3e, 0x49, 0xe3, 0x88, 0x80, 0x7f, 0x17, 0x4d, 0xae, 0xb9, 0xbd, 0x24, 0x81, 0x56,
-	0x11, 0xb9, 0x50, 0x9a, 0x68, 0x6a, 0x19, 0x11, 0x7c, 0xcc, 0x2d, 0x97, 0x61, 0xab, 0xe2, 0x98,
-	0xfe, 0xbe, 0xcd, 0xf4, 0x8e, 0xdb, 0xcb, 0x63, 0xad, 0xa2, 0x13, 0xa5, 0x31, 0xb5, 0xec, 0x2c,
-	0x85, 0x23, 0x0a, 0x9d, 0x47, 0x05, 0x0a, 0xed, 0x8e, 0x15, 0x16, 0x9d, 0x42, 0xfb, 0x01, 0x85,
-	0xbc, 0xf7, 0xb1, 0xc4, 0x07, 0xf8, 0xf7, 0x3e, 0x89, 0xf4, 0x19, 0x5c, 0x50, 0x2e, 0x58, 0x40,
-	0xac, 0x22, 0x86, 0xc9, 0xa0, 0xb5, 0xe4, 0x04, 0xf6, 0xe6, 0x09, 0x24, 0x7f, 0xd5, 0x89, 0xc3,
-	0x9f, 0xab, 0x01, 0x93, 0x01, 0xea, 0xc3, 0x9f, 0x73, 0xe8, 0xaf, 0xa4, 0xba, 0x96, 0x44, 0xb3,
-	0x11, 0xe3, 0x53, 0x16, 0xb4, 0x96, 0x1d, 0xe5, 0xce, 0x6d, 0xca, 0xd7, 0x31, 0x0a, 0xa7, 0x20,
-	0xef, 0x5b, 0x09, 0xd6, 0x6e, 0x3c, 0x1b, 0x13, 0x29, 0x69, 0x18, 0x1a, 0x40, 0x23, 0x77, 0x40,
-	0x12, 0x4b, 0x9f, 0xc6, 0xde, 0x63, 0x16, 0x48, 0xd0, 0xfd, 0x05, 0xbc, 0x3a, 0xf3, 0x40, 0x4a,
-	0xfa, 0x04, 0xea, 0x86, 0xe9, 0x29, 0xd3, 0x44, 0x70, 0x63, 0x53, 0x0f, 0xac, 0x17, 0xf9, 0x06,
-	0xee, 0xf8, 0x8c, 0x3b, 0x0f, 0x81, 0x99, 0xed, 0x7a, 0xdb, 0xb0, 0x75, 0xcb, 0x01, 0x09, 0x67,
-	0x62, 0x81, 0x2f, 0x25, 0xd8, 0xba, 0xbf, 0x14, 0xf4, 0x1f, 0xac, 0x17, 0x93, 0x35, 0x09, 0x98,
-	0x60, 0x21, 0xb5, 0x99, 0x2d, 0x9a, 0x22, 0x4f, 0xd2, 0xc7, 0xe9, 0x19, 0x7a, 0x0b, 0xdb, 0x45,
-	0xcb, 0x12, 0xcd, 0x22, 0xa5, 0x2d, 0xe1, 0xd2, 0x32, 0x3d, 0xa5, 0x22, 0x2d, 0xbf, 0x59, 0x2c,
-	0x3f, 0x1b, 0x62, 0x78, 0xb3, 0xe0, 0x5e, 0xec, 0xf2, 0x4e, 0xd3, 0x34, 0xef, 0x05, 0x40, 0x7e,
-	0x4b, 0xb4, 0x1f, 0x0f, 0xac, 0x78, 0x17, 0x0f, 0xac, 0x72, 0xbb, 0x7e, 0x88, 0xee, 0xb6, 0x03,
-	0x67, 0x90, 0x57, 0x95, 0x6a, 0xb9, 0x51, 0xf1, 0xbe, 0x97, 0x60, 0x29, 0x39, 0x41, 0x3b, 0x00,
-	0x3c, 0x22, 0x34, 0x08, 0x34, 0x33, 0xc9, 0xc8, 0x5b, 0xc1, 0x35, 0x1e, 0xbd, 0x4c, 0x02, 0xb1,
-	0xfb, 0x63, 0xed, 0x74, 0xe6, 0xb9, 0x75, 0x6c, 0xc6, 0x1b, 0x9d, 0xb4, 0xea, 0x8a, 0x49, 0x67,
-	0xc6, 0x1a, 0x6e, 0x14, 0x1a, 0x71, 0x1e, 0xc7, 0x51, 0x17, 0xd6, 0x1f, 0x30, 0x5d, 0x15, 0xaf,
-	0x05, 0x73, 0x0c, 0xf6, 0x3f, 0x6c, 0x3c, 0x64, 0xa4, 0x2a, 0x6e, 0x06, 0x73, 0x4c, 0xd3, 0xeb,
-	0xbe, 0x3f, 0x08, 0x95, 0x0a, 0x05, 0xf3, 0x43, 0x25, 0xa8, 0x0c, 0x7d, 0xa5, 0xc3, 0x4e, 0xdc,
-	0x0d, 0xf7, 0x23, 0x86, 0x9d, 0x39, 0x5f, 0x95, 0xe1, 0x92, 0xfb, 0x9a, 0x74, 0x7f, 0x04, 0x00,
-	0x00, 0xff, 0xff, 0x8e, 0xd0, 0x70, 0xb7, 0x73, 0x06, 0x00, 0x00,
-}

vendor/google.golang.org/grpc/grpclb/grpc_lb_v1/messages/messages.proto

@@ -1,155 +0,0 @@
-// Copyright 2016 gRPC authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package grpc.lb.v1;
-option go_package = "google.golang.org/grpc/grpclb/grpc_lb_v1/messages";
-
-message Duration {
-  // Signed seconds of the span of time. Must be from -315,576,000,000
-  // to +315,576,000,000 inclusive.
-  int64 seconds = 1;
-
-  // Signed fractions of a second at nanosecond resolution of the span
-  // of time. Durations less than one second are represented with a 0
-  // `seconds` field and a positive or negative `nanos` field. For durations
-  // of one second or more, a non-zero value for the `nanos` field must be
-  // of the same sign as the `seconds` field. Must be from -999,999,999
-  // to +999,999,999 inclusive.
-  int32 nanos = 2;
-}
-
-message Timestamp {
-  // Represents seconds of UTC time since Unix epoch
-  // 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
-  // 9999-12-31T23:59:59Z inclusive.
-  int64 seconds = 1;
-
-  // Non-negative fractions of a second at nanosecond resolution. Negative
-  // second values with fractions must still have non-negative nanos values
-  // that count forward in time. Must be from 0 to 999,999,999
-  // inclusive.
-  int32 nanos = 2;
-}
-
-message LoadBalanceRequest {
-  oneof load_balance_request_type {
-    // This message should be sent on the first request to the load balancer.
-    InitialLoadBalanceRequest initial_request = 1;
-
-    // The client stats should be periodically reported to the load balancer
-    // based on the duration defined in the InitialLoadBalanceResponse.
-    ClientStats client_stats = 2;
-  }
-}
-
-message InitialLoadBalanceRequest {
-  // Name of load balanced service (IE, balancer.service.com)
-  // length should be less than 256 bytes.
-  string name = 1;
-}
-
-// Contains client level statistics that are useful to load balancing. Each
-// count except the timestamp should be reset to zero after reporting the stats.
-message ClientStats {
-  // The timestamp of generating the report.
-  Timestamp timestamp = 1;
-
-  // The total number of RPCs that started.
-  int64 num_calls_started = 2;
-
-  // The total number of RPCs that finished.
-  int64 num_calls_finished = 3;
-
-  // The total number of RPCs that were dropped by the client because of rate
-  // limiting.
-  int64 num_calls_finished_with_drop_for_rate_limiting = 4;
-
-  // The total number of RPCs that were dropped by the client because of load
-  // balancing.
-  int64 num_calls_finished_with_drop_for_load_balancing = 5;
-
-  // The total number of RPCs that failed to reach a server except dropped RPCs.
-  int64 num_calls_finished_with_client_failed_to_send = 6;
-
-  // The total number of RPCs that finished and are known to have been received
-  // by a server.
-  int64 num_calls_finished_known_received = 7;
-}
-
-message LoadBalanceResponse {
-  oneof load_balance_response_type {
-    // This message should be sent on the first response to the client.
-    InitialLoadBalanceResponse initial_response = 1;
-
-    // Contains the list of servers selected by the load balancer. The client
-    // should send requests to these servers in the specified order.
-    ServerList server_list = 2;
-  }
-}
-
-message InitialLoadBalanceResponse {
-  // This is an application layer redirect that indicates the client should use
-  // the specified server for load balancing. When this field is non-empty in
-  // the response, the client should open a separate connection to the
-  // load_balancer_delegate and call the BalanceLoad method. Its length should
-  // be less than 64 bytes.
-  string load_balancer_delegate = 1;
-
-  // This interval defines how often the client should send the client stats
-  // to the load balancer. Stats should only be reported when the duration is
-  // positive.
-  Duration client_stats_report_interval = 2;
-}
-
-message ServerList {
-  // Contains a list of servers selected by the load balancer. The list will
-  // be updated when server resolutions change or as needed to balance load
-  // across more servers. The client should consume the server list in order
-  // unless instructed otherwise via the client_config.
-  repeated Server servers = 1;
-
-  // Was google.protobuf.Duration expiration_interval.
-  reserved 3;
-}
-
-// Contains server information. When none of the [drop_for_*] fields are true,
-// use the other fields. When drop_for_rate_limiting is true, ignore all other
-// fields. Use drop_for_load_balancing only when it is true and
-// drop_for_rate_limiting is false.
-message Server {
-  // A resolved address for the server, serialized in network-byte-order. It may
-  // either be an IPv4 or IPv6 address.
-  bytes ip_address = 1;
-
-  // A resolved port number for the server.
-  int32 port = 2;
-
-  // An opaque but printable token given to the frontend for each pick. All
-  // frontend requests for that pick must include the token in its initial
-  // metadata. The token is used by the backend to verify the request and to
-  // allow the backend to report load to the gRPC LB system.
-  //
-  // Its length is variable but less than 50 bytes.
-  string load_balance_token = 3;
-
-  // Indicates whether this particular request should be dropped by the client
-  // for rate limiting.
-  bool drop_for_rate_limiting = 4;
-
-  // Indicates whether this particular request should be dropped by the client
-  // for load balancing.
-  bool drop_for_load_balancing = 5;
-}

vendor/google.golang.org/grpc/grpclb_picker.go

@@ -1,159 +0,0 @@
-/*
- *
- * Copyright 2017 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-package grpc
-
-import (
-	"sync"
-	"sync/atomic"
-
-	"golang.org/x/net/context"
-	"google.golang.org/grpc/balancer"
-	"google.golang.org/grpc/codes"
-	lbpb "google.golang.org/grpc/grpclb/grpc_lb_v1/messages"
-	"google.golang.org/grpc/status"
-)
-
-type rpcStats struct {
-	NumCallsStarted                          int64
-	NumCallsFinished                         int64
-	NumCallsFinishedWithDropForRateLimiting  int64
-	NumCallsFinishedWithDropForLoadBalancing int64
-	NumCallsFinishedWithClientFailedToSend   int64
-	NumCallsFinishedKnownReceived            int64
-}
-
-// toClientStats converts rpcStats to lbpb.ClientStats, and clears rpcStats.
-func (s *rpcStats) toClientStats() *lbpb.ClientStats {
-	stats := &lbpb.ClientStats{
-		NumCallsStarted:                          atomic.SwapInt64(&s.NumCallsStarted, 0),
-		NumCallsFinished:                         atomic.SwapInt64(&s.NumCallsFinished, 0),
-		NumCallsFinishedWithDropForRateLimiting:  atomic.SwapInt64(&s.NumCallsFinishedWithDropForRateLimiting, 0),
-		NumCallsFinishedWithDropForLoadBalancing: atomic.SwapInt64(&s.NumCallsFinishedWithDropForLoadBalancing, 0),
-		NumCallsFinishedWithClientFailedToSend:   atomic.SwapInt64(&s.NumCallsFinishedWithClientFailedToSend, 0),
-		NumCallsFinishedKnownReceived:            atomic.SwapInt64(&s.NumCallsFinishedKnownReceived, 0),
-	}
-	return stats
-}
-
-func (s *rpcStats) dropForRateLimiting() {
-	atomic.AddInt64(&s.NumCallsStarted, 1)
-	atomic.AddInt64(&s.NumCallsFinishedWithDropForRateLimiting, 1)
-	atomic.AddInt64(&s.NumCallsFinished, 1)
-}
-
-func (s *rpcStats) dropForLoadBalancing() {
-	atomic.AddInt64(&s.NumCallsStarted, 1)
-	atomic.AddInt64(&s.NumCallsFinishedWithDropForLoadBalancing, 1)
-	atomic.AddInt64(&s.NumCallsFinished, 1)
-}
-
-func (s *rpcStats) failedToSend() {
-	atomic.AddInt64(&s.NumCallsStarted, 1)
-	atomic.AddInt64(&s.NumCallsFinishedWithClientFailedToSend, 1)
-	atomic.AddInt64(&s.NumCallsFinished, 1)
-}
-
-func (s *rpcStats) knownReceived() {
-	atomic.AddInt64(&s.NumCallsStarted, 1)
-	atomic.AddInt64(&s.NumCallsFinishedKnownReceived, 1)
-	atomic.AddInt64(&s.NumCallsFinished, 1)
-}
-
-type errPicker struct {
-	// Pick always returns this err.
-	err error
-}
-
-func (p *errPicker) Pick(ctx context.Context, opts balancer.PickOptions) (balancer.SubConn, func(balancer.DoneInfo), error) {
-	return nil, nil, p.err
-}
-
-// rrPicker does roundrobin on subConns. It's typically used when there's no
-// response from remote balancer, and grpclb falls back to the resolved
-// backends.
-//
-// It guaranteed that len(subConns) > 0.
-type rrPicker struct {
-	mu           sync.Mutex
-	subConns     []balancer.SubConn // The subConns that were READY when taking the snapshot.
-	subConnsNext int
-}
-
-func (p *rrPicker) Pick(ctx context.Context, opts balancer.PickOptions) (balancer.SubConn, func(balancer.DoneInfo), error) {
-	p.mu.Lock()
-	defer p.mu.Unlock()
-	sc := p.subConns[p.subConnsNext]
-	p.subConnsNext = (p.subConnsNext + 1) % len(p.subConns)
-	return sc, nil, nil
-}
-
-// lbPicker does two layers of picks:
-//
-// First layer: roundrobin on all servers in serverList, including drops and backends.
-// - If it picks a drop, the RPC will fail as being dropped.
-// - If it picks a backend, do a second layer pick to pick the real backend.
-//
-// Second layer: roundrobin on all READY backends.
-//
-// It's guaranteed that len(serverList) > 0.
-type lbPicker struct {
-	mu             sync.Mutex
-	serverList     []*lbpb.Server
-	serverListNext int
-	subConns       []balancer.SubConn // The subConns that were READY when taking the snapshot.
-	subConnsNext   int
-
-	stats *rpcStats
-}
-
-func (p *lbPicker) Pick(ctx context.Context, opts balancer.PickOptions) (balancer.SubConn, func(balancer.DoneInfo), error) {
-	p.mu.Lock()
-	defer p.mu.Unlock()
-
-	// Layer one roundrobin on serverList.
-	s := p.serverList[p.serverListNext]
-	p.serverListNext = (p.serverListNext + 1) % len(p.serverList)
-
-	// If it's a drop, return an error and fail the RPC.
-	if s.DropForRateLimiting {
-		p.stats.dropForRateLimiting()
-		return nil, nil, status.Errorf(codes.Unavailable, "request dropped by grpclb")
-	}
-	if s.DropForLoadBalancing {
-		p.stats.dropForLoadBalancing()
-		return nil, nil, status.Errorf(codes.Unavailable, "request dropped by grpclb")
-	}
-
-	// If not a drop but there's no ready subConns.
-	if len(p.subConns) <= 0 {
-		return nil, nil, balancer.ErrNoSubConnAvailable
-	}
-
-	// Return the next ready subConn in the list, also collect rpc stats.
-	sc := p.subConns[p.subConnsNext]
-	p.subConnsNext = (p.subConnsNext + 1) % len(p.subConns)
-	done := func(info balancer.DoneInfo) {
-		if !info.BytesSent {
-			p.stats.failedToSend()
-		} else if info.BytesReceived {
-			p.stats.knownReceived()
-		}
-	}
-	return sc, done, nil
-}

vendor/google.golang.org/grpc/grpclb_remote_balancer.go

@@ -1,266 +0,0 @@
-/*
- *
- * Copyright 2017 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-package grpc
-
-import (
-	"fmt"
-	"net"
-	"reflect"
-	"time"
-
-	"golang.org/x/net/context"
-	"google.golang.org/grpc/balancer"
-	"google.golang.org/grpc/channelz"
-
-	"google.golang.org/grpc/connectivity"
-	lbpb "google.golang.org/grpc/grpclb/grpc_lb_v1/messages"
-	"google.golang.org/grpc/grpclog"
-	"google.golang.org/grpc/metadata"
-	"google.golang.org/grpc/resolver"
-)
-
-// processServerList updates balaner's internal state, create/remove SubConns
-// and regenerates picker using the received serverList.
-func (lb *lbBalancer) processServerList(l *lbpb.ServerList) {
-	grpclog.Infof("lbBalancer: processing server list: %+v", l)
-	lb.mu.Lock()
-	defer lb.mu.Unlock()
-
-	// Set serverListReceived to true so fallback will not take effect if it has
-	// not hit timeout.
-	lb.serverListReceived = true
-
-	// If the new server list == old server list, do nothing.
-	if reflect.DeepEqual(lb.fullServerList, l.Servers) {
-		grpclog.Infof("lbBalancer: new serverlist same as the previous one, ignoring")
-		return
-	}
-	lb.fullServerList = l.Servers
-
-	var backendAddrs []resolver.Address
-	for _, s := range l.Servers {
-		if s.DropForLoadBalancing || s.DropForRateLimiting {
-			continue
-		}
-
-		md := metadata.Pairs(lbTokeyKey, s.LoadBalanceToken)
-		ip := net.IP(s.IpAddress)
-		ipStr := ip.String()
-		if ip.To4() == nil {
-			// Add square brackets to ipv6 addresses, otherwise net.Dial() and
-			// net.SplitHostPort() will return too many colons error.
-			ipStr = fmt.Sprintf("[%s]", ipStr)
-		}
-		addr := resolver.Address{
-			Addr:     fmt.Sprintf("%s:%d", ipStr, s.Port),
-			Metadata: &md,
-		}
-
-		backendAddrs = append(backendAddrs, addr)
-	}
-
-	// Call refreshSubConns to create/remove SubConns.
-	lb.refreshSubConns(backendAddrs)
-	// Regenerate and update picker no matter if there's update on backends (if
-	// any SubConn will be newed/removed). Because since the full serverList was
-	// different, there might be updates in drops or pick weights(different
-	// number of duplicates). We need to update picker with the fulllist.
-	//
-	// Now with cache, even if SubConn was newed/removed, there might be no
-	// state changes.
-	lb.regeneratePicker()
-	lb.cc.UpdateBalancerState(lb.state, lb.picker)
-}
-
-// refreshSubConns creates/removes SubConns with backendAddrs. It returns a bool
-// indicating whether the backendAddrs are different from the cached
-// backendAddrs (whether any SubConn was newed/removed).
-// Caller must hold lb.mu.
-func (lb *lbBalancer) refreshSubConns(backendAddrs []resolver.Address) bool {
-	lb.backendAddrs = nil
-	var backendsUpdated bool
-	// addrsSet is the set converted from backendAddrs, it's used to quick
-	// lookup for an address.
-	addrsSet := make(map[resolver.Address]struct{})
-	// Create new SubConns.
-	for _, addr := range backendAddrs {
-		addrWithoutMD := addr
-		addrWithoutMD.Metadata = nil
-		addrsSet[addrWithoutMD] = struct{}{}
-		lb.backendAddrs = append(lb.backendAddrs, addrWithoutMD)
-
-		if _, ok := lb.subConns[addrWithoutMD]; !ok {
-			backendsUpdated = true
-
-			// Use addrWithMD to create the SubConn.
-			sc, err := lb.cc.NewSubConn([]resolver.Address{addr}, balancer.NewSubConnOptions{})
-			if err != nil {
-				grpclog.Warningf("roundrobinBalancer: failed to create new SubConn: %v", err)
-				continue
-			}
-			lb.subConns[addrWithoutMD] = sc // Use the addr without MD as key for the map.
-			if _, ok := lb.scStates[sc]; !ok {
-				// Only set state of new sc to IDLE. The state could already be
-				// READY for cached SubConns.
-				lb.scStates[sc] = connectivity.Idle
-			}
-			sc.Connect()
-		}
-	}
-
-	for a, sc := range lb.subConns {
-		// a was removed by resolver.
-		if _, ok := addrsSet[a]; !ok {
-			backendsUpdated = true
-
-			lb.cc.RemoveSubConn(sc)
-			delete(lb.subConns, a)
-			// Keep the state of this sc in b.scStates until sc's state becomes Shutdown.
-			// The entry will be deleted in HandleSubConnStateChange.
-		}
-	}
-
-	return backendsUpdated
-}
-
-func (lb *lbBalancer) readServerList(s *balanceLoadClientStream) error {
-	for {
-		reply, err := s.Recv()
-		if err != nil {
-			return fmt.Errorf("grpclb: failed to recv server list: %v", err)
-		}
-		if serverList := reply.GetServerList(); serverList != nil {
-			lb.processServerList(serverList)
-		}
-	}
-}
-
-func (lb *lbBalancer) sendLoadReport(s *balanceLoadClientStream, interval time.Duration) {
-	ticker := time.NewTicker(interval)
-	defer ticker.Stop()
-	for {
-		select {
-		case <-ticker.C:
-		case <-s.Context().Done():
-			return
-		}
-		stats := lb.clientStats.toClientStats()
-		t := time.Now()
-		stats.Timestamp = &lbpb.Timestamp{
-			Seconds: t.Unix(),
-			Nanos:   int32(t.Nanosecond()),
-		}
-		if err := s.Send(&lbpb.LoadBalanceRequest{
-			LoadBalanceRequestType: &lbpb.LoadBalanceRequest_ClientStats{
-				ClientStats: stats,
-			},
-		}); err != nil {
-			return
-		}
-	}
-}
-
-func (lb *lbBalancer) callRemoteBalancer() error {
-	lbClient := &loadBalancerClient{cc: lb.ccRemoteLB}
-	ctx, cancel := context.WithCancel(context.Background())
-	defer cancel()
-	stream, err := lbClient.BalanceLoad(ctx, FailFast(false))
-	if err != nil {
-		return fmt.Errorf("grpclb: failed to perform RPC to the remote balancer %v", err)
-	}
-
-	// grpclb handshake on the stream.
-	initReq := &lbpb.LoadBalanceRequest{
-		LoadBalanceRequestType: &lbpb.LoadBalanceRequest_InitialRequest{
-			InitialRequest: &lbpb.InitialLoadBalanceRequest{
-				Name: lb.target,
-			},
-		},
-	}
-	if err := stream.Send(initReq); err != nil {
-		return fmt.Errorf("grpclb: failed to send init request: %v", err)
-	}
-	reply, err := stream.Recv()
-	if err != nil {
-		return fmt.Errorf("grpclb: failed to recv init response: %v", err)
-	}
-	initResp := reply.GetInitialResponse()
-	if initResp == nil {
-		return fmt.Errorf("grpclb: reply from remote balancer did not include initial response")
-	}
-	if initResp.LoadBalancerDelegate != "" {
-		return fmt.Errorf("grpclb: Delegation is not supported")
-	}
-
-	go func() {
-		if d := convertDuration(initResp.ClientStatsReportInterval); d > 0 {
-			lb.sendLoadReport(stream, d)
-		}
-	}()
-	return lb.readServerList(stream)
-}
-
-func (lb *lbBalancer) watchRemoteBalancer() {
-	for {
-		err := lb.callRemoteBalancer()
-		select {
-		case <-lb.doneCh:
-			return
-		default:
-			if err != nil {
-				grpclog.Error(err)
-			}
-		}
-
-	}
-}
-
-func (lb *lbBalancer) dialRemoteLB(remoteLBName string) {
-	var dopts []DialOption
-	if creds := lb.opt.DialCreds; creds != nil {
-		if err := creds.OverrideServerName(remoteLBName); err == nil {
-			dopts = append(dopts, WithTransportCredentials(creds))
-		} else {
-			grpclog.Warningf("grpclb: failed to override the server name in the credentials: %v, using Insecure", err)
-			dopts = append(dopts, WithInsecure())
-		}
-	} else {
-		dopts = append(dopts, WithInsecure())
-	}
-	if lb.opt.Dialer != nil {
-		// WithDialer takes a different type of function, so we instead use a
-		// special DialOption here.
-		dopts = append(dopts, withContextDialer(lb.opt.Dialer))
-	}
-	// Explicitly set pickfirst as the balancer.
-	dopts = append(dopts, WithBalancerName(PickFirstBalancerName))
-	dopts = append(dopts, withResolverBuilder(lb.manualResolver))
-	if channelz.IsOn() {
-		dopts = append(dopts, WithChannelzParentID(lb.opt.ChannelzParentID))
-	}
-
-	// DialContext using manualResolver.Scheme, which is a random scheme generated
-	// when init grpclb. The target name is not important.
-	cc, err := DialContext(context.Background(), "grpclb:///grpclb.server", dopts...)
-	if err != nil {
-		grpclog.Fatalf("failed to dial: %v", err)
-	}
-	lb.ccRemoteLB = cc
-	go lb.watchRemoteBalancer()
-}

vendor/google.golang.org/grpc/grpclb_util.go

@@ -1,214 +0,0 @@
-/*
- *
- * Copyright 2016 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-package grpc
-
-import (
-	"fmt"
-	"sync"
-	"time"
-
-	"google.golang.org/grpc/balancer"
-	"google.golang.org/grpc/connectivity"
-	"google.golang.org/grpc/resolver"
-)
-
-// The parent ClientConn should re-resolve when grpclb loses connection to the
-// remote balancer. When the ClientConn inside grpclb gets a TransientFailure,
-// it calls lbManualResolver.ResolveNow(), which calls parent ClientConn's
-// ResolveNow, and eventually results in re-resolve happening in parent
-// ClientConn's resolver (DNS for example).
-//
-//                          parent
-//                          ClientConn
-//  +-----------------------------------------------------------------+
-//  |             parent          +---------------------------------+ |
-//  | DNS         ClientConn      |  grpclb                         | |
-//  | resolver    balancerWrapper |                                 | |
-//  | +              +            |    grpclb          grpclb       | |
-//  | |              |            |    ManualResolver  ClientConn   | |
-//  | |              |            |     +              +            | |
-//  | |              |            |     |              | Transient  | |
-//  | |              |            |     |              | Failure    | |
-//  | |              |            |     |  <---------  |            | |
-//  | |              | <--------------- |  ResolveNow  |            | |
-//  | |  <---------  | ResolveNow |     |              |            | |
-//  | |  ResolveNow  |            |     |              |            | |
-//  | |              |            |     |              |            | |
-//  | +              +            |     +              +            | |
-//  |                             +---------------------------------+ |
-//  +-----------------------------------------------------------------+
-
-// lbManualResolver is used by the ClientConn inside grpclb. It's a manual
-// resolver with a special ResolveNow() function.
-//
-// When ResolveNow() is called, it calls ResolveNow() on the parent ClientConn,
-// so when grpclb client lose contact with remote balancers, the parent
-// ClientConn's resolver will re-resolve.
-type lbManualResolver struct {
-	scheme string
-	ccr    resolver.ClientConn
-
-	ccb balancer.ClientConn
-}
-
-func (r *lbManualResolver) Build(_ resolver.Target, cc resolver.ClientConn, _ resolver.BuildOption) (resolver.Resolver, error) {
-	r.ccr = cc
-	return r, nil
-}
-
-func (r *lbManualResolver) Scheme() string {
-	return r.scheme
-}
-
-// ResolveNow calls resolveNow on the parent ClientConn.
-func (r *lbManualResolver) ResolveNow(o resolver.ResolveNowOption) {
-	r.ccb.ResolveNow(o)
-}
-
-// Close is a noop for Resolver.
-func (*lbManualResolver) Close() {}
-
-// NewAddress calls cc.NewAddress.
-func (r *lbManualResolver) NewAddress(addrs []resolver.Address) {
-	r.ccr.NewAddress(addrs)
-}
-
-// NewServiceConfig calls cc.NewServiceConfig.
-func (r *lbManualResolver) NewServiceConfig(sc string) {
-	r.ccr.NewServiceConfig(sc)
-}
-
-const subConnCacheTime = time.Second * 10
-
-// lbCacheClientConn is a wrapper balancer.ClientConn with a SubConn cache.
-// SubConns will be kept in cache for subConnCacheTime before being removed.
-//
-// Its new and remove methods are updated to do cache first.
-type lbCacheClientConn struct {
-	cc      balancer.ClientConn
-	timeout time.Duration
-
-	mu sync.Mutex
-	// subConnCache only keeps subConns that are being deleted.
-	subConnCache  map[resolver.Address]*subConnCacheEntry
-	subConnToAddr map[balancer.SubConn]resolver.Address
-}
-
-type subConnCacheEntry struct {
-	sc balancer.SubConn
-
-	cancel        func()
-	abortDeleting bool
-}
-
-func newLBCacheClientConn(cc balancer.ClientConn) *lbCacheClientConn {
-	return &lbCacheClientConn{
-		cc:            cc,
-		timeout:       subConnCacheTime,
-		subConnCache:  make(map[resolver.Address]*subConnCacheEntry),
-		subConnToAddr: make(map[balancer.SubConn]resolver.Address),
-	}
-}
-
-func (ccc *lbCacheClientConn) NewSubConn(addrs []resolver.Address, opts balancer.NewSubConnOptions) (balancer.SubConn, error) {
-	if len(addrs) != 1 {
-		return nil, fmt.Errorf("grpclb calling NewSubConn with addrs of length %v", len(addrs))
-	}
-	addrWithoutMD := addrs[0]
-	addrWithoutMD.Metadata = nil
-
-	ccc.mu.Lock()
-	defer ccc.mu.Unlock()
-	if entry, ok := ccc.subConnCache[addrWithoutMD]; ok {
-		// If entry is in subConnCache, the SubConn was being deleted.
-		// cancel function will never be nil.
-		entry.cancel()
-		delete(ccc.subConnCache, addrWithoutMD)
-		return entry.sc, nil
-	}
-
-	scNew, err := ccc.cc.NewSubConn(addrs, opts)
-	if err != nil {
-		return nil, err
-	}
-
-	ccc.subConnToAddr[scNew] = addrWithoutMD
-	return scNew, nil
-}
-
-func (ccc *lbCacheClientConn) RemoveSubConn(sc balancer.SubConn) {
-	ccc.mu.Lock()
-	defer ccc.mu.Unlock()
-	addr, ok := ccc.subConnToAddr[sc]
-	if !ok {
-		return
-	}
-
-	if entry, ok := ccc.subConnCache[addr]; ok {
-		if entry.sc != sc {
-			// This could happen if NewSubConn was called multiple times for the
-			// same address, and those SubConns are all removed. We remove sc
-			// immediately here.
-			delete(ccc.subConnToAddr, sc)
-			ccc.cc.RemoveSubConn(sc)
-		}
-		return
-	}
-
-	entry := &subConnCacheEntry{
-		sc: sc,
-	}
-	ccc.subConnCache[addr] = entry
-
-	timer := time.AfterFunc(ccc.timeout, func() {
-		ccc.mu.Lock()
-		if entry.abortDeleting {
-			return
-		}
-		ccc.cc.RemoveSubConn(sc)
-		delete(ccc.subConnToAddr, sc)
-		delete(ccc.subConnCache, addr)
-		ccc.mu.Unlock()
-	})
-	entry.cancel = func() {
-		if !timer.Stop() {
-			// If stop was not successful, the timer has fired (this can only
-			// happen in a race). But the deleting function is blocked on ccc.mu
-			// because the mutex was held by the caller of this function.
-			//
-			// Set abortDeleting to true to abort the deleting function. When
-			// the lock is released, the deleting function will acquire the
-			// lock, check the value of abortDeleting and return.
-			entry.abortDeleting = true
-		}
-	}
-}
-
-func (ccc *lbCacheClientConn) UpdateBalancerState(s connectivity.State, p balancer.Picker) {
-	ccc.cc.UpdateBalancerState(s, p)
-}
-
-func (ccc *lbCacheClientConn) close() {
-	ccc.mu.Lock()
-	// Only cancel all existing timers. There's no need to remove SubConns.
-	for _, entry := range ccc.subConnCache {
-		entry.cancel()
-	}
-	ccc.mu.Unlock()
-}

vendor/google.golang.org/grpc/install_gae.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+TMP=$(mktemp -d /tmp/sdk.XXX) \
+&& curl -o $TMP.zip "https://storage.googleapis.com/appengine-sdks/featured/go_appengine_sdk_linux_amd64-1.9.64.zip" \
+&& unzip -q $TMP.zip -d $TMP \
+&& export PATH="$PATH:$TMP/go_appengine"

vendor/google.golang.org/grpc/internal/backoff/backoff.go

@@ -0,0 +1,78 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package backoff implement the backoff strategy for gRPC.
+//
+// This is kept in internal until the gRPC project decides whether or not to
+// allow alternative backoff strategies.
+package backoff
+
+import (
+	"time"
+
+	"google.golang.org/grpc/internal/grpcrand"
+)
+
+// Strategy defines the methodology for backing off after a grpc connection
+// failure.
+//
+type Strategy interface {
+	// Backoff returns the amount of time to wait before the next retry given
+	// the number of consecutive failures.
+	Backoff(retries int) time.Duration
+}
+
+const (
+	// baseDelay is the amount of time to wait before retrying after the first
+	// failure.
+	baseDelay = 1.0 * time.Second
+	// factor is applied to the backoff after each retry.
+	factor = 1.6
+	// jitter provides a range to randomize backoff delays.
+	jitter = 0.2
+)
+
+// Exponential implements exponential backoff algorithm as defined in
+// https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md.
+type Exponential struct {
+	// MaxDelay is the upper bound of backoff delay.
+	MaxDelay time.Duration
+}
+
+// Backoff returns the amount of time to wait before the next retry given the
+// number of retries.
+func (bc Exponential) Backoff(retries int) time.Duration {
+	if retries == 0 {
+		return baseDelay
+	}
+	backoff, max := float64(baseDelay), float64(bc.MaxDelay)
+	for backoff < max && retries > 0 {
+		backoff *= factor
+		retries--
+	}
+	if backoff > max {
+		backoff = max
+	}
+	// Randomize backoff delays so that if a cluster of requests start at
+	// the same time, they won't operate in lockstep.
+	backoff *= 1 + jitter*(grpcrand.Float64()*2-1)
+	if backoff < 0 {
+		return 0
+	}
+	return time.Duration(backoff)
+}

vendor/google.golang.org/grpc/internal/grpcrand/grpcrand.go

@@ -0,0 +1,56 @@
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Package grpcrand implements math/rand functions in a concurrent-safe way
+// with a global random source, independent of math/rand's global source.
+package grpcrand
+
+import (
+	"math/rand"
+	"sync"
+	"time"
+)
+
+var (
+	r  = rand.New(rand.NewSource(time.Now().UnixNano()))
+	mu sync.Mutex
+)
+
+// Int63n implements rand.Int63n on the grpcrand global source.
+func Int63n(n int64) int64 {
+	mu.Lock()
+	res := r.Int63n(n)
+	mu.Unlock()
+	return res
+}
+
+// Intn implements rand.Intn on the grpcrand global source.
+func Intn(n int) int {
+	mu.Lock()
+	res := r.Intn(n)
+	mu.Unlock()
+	return res
+}
+
+// Float64 implements rand.Float64 on the grpcrand global source.
+func Float64() float64 {
+	mu.Lock()
+	res := r.Float64()
+	mu.Unlock()
+	return res
+}

vendor/google.golang.org/grpc/internal/internal.go

@@ -15,13 +15,22 @@
  *
  */
 
-// Package internal contains gRPC-internal code for testing, to avoid polluting
+// Package internal contains gRPC-internal code, to avoid polluting
-// the godoc of the top-level grpc package.
+// the godoc of the top-level grpc package.  It must not import any grpc
+// symbols to avoid circular dependencies.
 package internal
 
-// TestingUseHandlerImpl enables the http.Handler-based server implementation.
+var (
-// It must be called before Serve and requires TLS credentials.
+
-//
+	// TestingUseHandlerImpl enables the http.Handler-based server implementation.
-// The provided grpcServer must be of type *grpc.Server. It is untyped
+	// It must be called before Serve and requires TLS credentials.
-// for circular dependency reasons.
+	//
-var TestingUseHandlerImpl func(grpcServer interface{})
+	// The provided grpcServer must be of type *grpc.Server. It is untyped
+	// for circular dependency reasons.
+	TestingUseHandlerImpl func(grpcServer interface{})
+
+	// WithContextDialer is exported by clientconn.go
+	WithContextDialer interface{} // func(context.Context, string) (net.Conn, error) grpc.DialOption
+	// WithResolverBuilder is exported by clientconn.go
+	WithResolverBuilder interface{} // func (resolver.Builder) grpc.DialOption
+)

vendor/google.golang.org/grpc/newstream.go

@@ -0,0 +1,27 @@
+// +build !js !wasm
+
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package grpc
+
+import "golang.org/x/net/context"
+
+func (cc *ClientConn) newStream(ctx context.Context, desc *StreamDesc, method string, opts ...CallOption) (ClientStream, error) {
+	return cc.makeStream(ctx, desc, method, opts...)
+}

vendor/google.golang.org/grpc/newstream_js.go

@@ -0,0 +1,34 @@
+// +build js,wasm
+
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package grpc
+
+import (
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+func (cc *ClientConn) newStream(ctx context.Context, desc *StreamDesc, method string, opts ...CallOption) (ClientStream, error) {
+	if desc.ClientStreams {
+		return nil, status.Error(codes.Unimplemented, "client-side and bi-directional streaming is not yet supported by gRPC-web")
+	}
+	return cc.makeStream(ctx, desc, method, opts...)
+}

vendor/google.golang.org/grpc/parse.go

@@ -0,0 +1,27 @@
+// +build !js !wasm
+
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package grpc
+
+import "google.golang.org/grpc/transport"
+
+func parseMsg(p *parser, s *transport.Stream, maxReceiveMessageSize int, pf payloadFormat, d []byte) ([]byte, error) {
+	return d, nil
+}

vendor/google.golang.org/grpc/parse_js.go

@@ -0,0 +1,79 @@
+// +build js,wasm
+
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package grpc
+
+import (
+	"bufio"
+	"bytes"
+	"errors"
+	"io"
+	"net/http"
+	"strings"
+
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+	"google.golang.org/grpc/transport"
+)
+
+func parseMsg(p *parser, s *transport.Stream, maxReceiveMessageSize int, pf payloadFormat, d []byte) ([]byte, error) {
+	if pf == trailer || pf == compressedTrailer {
+		trailers, err := readTrailers(bytes.NewReader(d), len(d))
+		if err != nil {
+			return nil, status.Errorf(codes.Internal, "grpc: failed to parse returned trailers: %v", err)
+		}
+		// Holy layer violation :(
+		// This is necessary because the gRPC-Web trailers are part of the response body. See
+		// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-WEB.md#protocol-differences-vs-grpc-over-http2
+		err = s.SetTrailers(trailers)
+		if err != nil {
+			return nil, status.Errorf(codes.Internal, "grpc: failed to set trailers on stream: %v", err)
+		}
+		// Sanity check that parser is done. This should return io.EOF
+		_, _, err = p.recvMsg(maxReceiveMessageSize)
+		if err == io.EOF {
+			return nil, err
+		}
+		return nil, status.Errorf(codes.Internal, "grpc: unexpected error reading last message from stream: %v", err)
+	}
+	return d, nil
+}
+
+// readTrailers consumes the rest of the reader and parses the
+// contents as "\r\n"-separated trailers, in accordance with
+// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-WEB.md#protocol-differences-vs-grpc-over-http2
+func readTrailers(in io.Reader, bufSize int) (http.Header, error) {
+	s := bufio.NewScanner(in)
+	buf := make([]byte, bufSize)
+	s.Buffer(buf, len(buf))
+	// Uses http.Header instead of metadata.MD as .Add method
+	// normalizes trailer keys.
+	trailers := http.Header{}
+	for s.Scan() {
+		v := s.Text()
+		kv := strings.SplitN(v, ": ", 2)
+		if len(kv) != 2 {
+			return nil, errors.New("malformed trailer: " + v)
+		}
+		trailers.Add(kv[0], kv[1])
+	}
+
+	return trailers, s.Err()
+}

vendor/google.golang.org/grpc/picker_wrapper.go

@@ -25,9 +25,9 @@ import (
 
 	"golang.org/x/net/context"
 	"google.golang.org/grpc/balancer"
-	"google.golang.org/grpc/channelz"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/internal/channelz"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/resolver"
 	"google.golang.org/grpc/status"
@@ -233,6 +233,8 @@ func (bp *pickerWrapper) close() {
 	close(bp.blockingCh)
 }
 
+const stickinessKeyCountLimit = 1000
+
 type stickyStoreEntry struct {
 	acw  *acBalancerWrapper
 	addr resolver.Address
@@ -243,12 +245,12 @@ type stickyStore struct {
 	// curMDKey is check before every get/put to avoid races. The operation will
 	// abort immediately when the given mdKey is different from the curMDKey.
 	curMDKey string
-	store    map[string]*stickyStoreEntry
+	store    *linkedMap
 }
 
 func newStickyStore() *stickyStore {
 	return &stickyStore{
-		store: make(map[string]*stickyStoreEntry),
+		store: newLinkedMap(),
 	}
 }
 
@@ -256,7 +258,7 @@ func newStickyStore() *stickyStore {
 func (ss *stickyStore) reset(newMDKey string) {
 	ss.mu.Lock()
 	ss.curMDKey = newMDKey
-	ss.store = make(map[string]*stickyStoreEntry)
+	ss.store.clear()
 	ss.mu.Unlock()
 }
 
@@ -269,9 +271,12 @@ func (ss *stickyStore) put(mdKey, stickyKey string, acw *acBalancerWrapper) {
 		return
 	}
 	// TODO(stickiness): limit the total number of entries.
-	ss.store[stickyKey] = &stickyStoreEntry{
+	ss.store.put(stickyKey, &stickyStoreEntry{
 		acw:  acw,
 		addr: acw.getAddrConn().getCurAddr(),
+	})
+	if ss.store.len() > stickinessKeyCountLimit {
+		ss.store.removeOldest()
 	}
 }
 
@@ -283,18 +288,18 @@ func (ss *stickyStore) get(mdKey, stickyKey string) (transport.ClientTransport,
 	if mdKey != ss.curMDKey {
 		return nil, false
 	}
-	entry, ok := ss.store[stickyKey]
+	entry, ok := ss.store.get(stickyKey)
 	if !ok {
 		return nil, false
 	}
 	ac := entry.acw.getAddrConn()
 	if ac.getCurAddr() != entry.addr {
-		delete(ss.store, stickyKey)
+		ss.store.remove(stickyKey)
 		return nil, false
 	}
 	t, ok := ac.getReadyTransport()
 	if !ok {
-		delete(ss.store, stickyKey)
+		ss.store.remove(stickyKey)
 		return nil, false
 	}
 	return t, true

vendor/google.golang.org/grpc/resolver/dns/dns_resolver.go

@@ -24,7 +24,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"math/rand"
 	"net"
 	"os"
 	"strconv"
@@ -34,6 +33,7 @@ import (
 
 	"golang.org/x/net/context"
 	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/internal/grpcrand"
 	"google.golang.org/grpc/resolver"
 )
 
@@ -51,8 +51,13 @@ const (
 )
 
 var (
-	errMissingAddr = errors.New("missing address")
+	errMissingAddr = errors.New("dns resolver: missing address")
-	randomGen      = rand.New(rand.NewSource(time.Now().UnixNano()))
+
+	// Addresses ending with a colon that is supposed to be the separator
+	// between host and port is not allowed.  E.g. "::" is a valid address as
+	// it is an IPv6 address (host only) and "[::]:" is invalid as it ends with
+	// a colon as the host and port separator
+	errEndsWithColon = errors.New("dns resolver: missing port after port-separator colon")
 )
 
 // NewBuilder creates a dnsBuilder which is used to factory DNS resolvers.
@@ -67,6 +72,9 @@ type dnsBuilder struct {
 
 // Build creates and starts a DNS resolver that watches the name resolution of the target.
 func (b *dnsBuilder) Build(target resolver.Target, cc resolver.ClientConn, opts resolver.BuildOption) (resolver.Resolver, error) {
+	if target.Authority != "" {
+		return nil, fmt.Errorf("Default DNS resolver does not support custom DNS server")
+	}
 	host, port, err := parseTarget(target.Endpoint)
 	if err != nil {
 		return nil, err
@@ -295,7 +303,6 @@ func formatIP(addr string) (addrIP string, ok bool) {
 // target: "ipv4-host:80" returns host: "ipv4-host", port: "80"
 // target: "[ipv6-host]" returns host: "ipv6-host", port: "443"
 // target: ":80" returns host: "localhost", port: "80"
-// target: ":" returns host: "localhost", port: "443"
 func parseTarget(target string) (host, port string, err error) {
 	if target == "" {
 		return "", "", errMissingAddr
@@ -305,15 +312,15 @@ func parseTarget(target string) (host, port string, err error) {
 		return target, defaultPort, nil
 	}
 	if host, port, err = net.SplitHostPort(target); err == nil {
+		if port == "" {
+			// If the port field is empty (target ends with colon), e.g. "[::1]:", this is an error.
+			return "", "", errEndsWithColon
+		}
 		// target has port, i.e ipv4-host:port, [ipv6-host]:port, host-name:port
 		if host == "" {
 			// Keep consistent with net.Dial(): If the host is empty, as in ":80", the local system is assumed.
 			host = "localhost"
 		}
-		if port == "" {
-			// If the port field is empty(target ends with colon), e.g. "[::1]:", defaultPort is used.
-			port = defaultPort
-		}
 		return host, port, nil
 	}
 	if host, port, err = net.SplitHostPort(target + ":" + defaultPort); err == nil {
@@ -346,7 +353,7 @@ func chosenByPercentage(a *int) bool {
 	if a == nil {
 		return true
 	}
-	return randomGen.Intn(100)+1 <= *a
+	return grpcrand.Intn(100)+1 <= *a
 }
 
 func canaryingSC(js string) string {

vendor/google.golang.org/grpc/resolver_conn_wrapper.go

@@ -65,8 +65,8 @@ func parseTarget(target string) (ret resolver.Target) {
 }
 
 // newCCResolverWrapper parses cc.target for scheme and gets the resolver
-// builder for this scheme. It then builds the resolver and starts the
+// builder for this scheme and builds the resolver. The monitoring goroutine
-// monitoring goroutine for it.
+// for it is not started yet and can be created by calling start().
 //
 // If withResolverBuilder dial option is set, the specified resolver will be
 // used instead.
@@ -148,7 +148,7 @@ func (ccr *ccResolverWrapper) NewAddress(addrs []resolver.Address) {
 }
 
 // NewServiceConfig is called by the resolver implemenetion to send service
-// configs to gPRC.
+// configs to gRPC.
 func (ccr *ccResolverWrapper) NewServiceConfig(sc string) {
 	select {
 	case <-ccr.scCh:

vendor/google.golang.org/grpc/rpc_util.go

@@ -419,8 +419,12 @@ func (o CustomCodecCallOption) after(c *callInfo) {}
 type payloadFormat uint8
 
 const (
-	compressionNone payloadFormat = iota // no compression
+	compressionNone payloadFormat = 0 // no compression
-	compressionMade
+	compressionMade payloadFormat = 1 // compressed
+	// Defined for gRPC-Web
+	// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-WEB.md#protocol-differences-vs-grpc-over-http2
+	trailer           payloadFormat = 1 << 7
+	compressedTrailer payloadFormat = (1 << 7) | 1
 )
 
 // parser reads complete gRPC messages from the underlying reader.
@@ -477,71 +481,88 @@ func (p *parser) recvMsg(maxReceiveMessageSize int) (pf payloadFormat, msg []byt
 	return pf, msg, nil
 }
 
-// encode serializes msg and returns a buffer of message header and a buffer of msg.
+// encode serializes msg and returns a buffer containing the message, or an
-// If msg is nil, it generates the message header and an empty msg buffer.
+// error if it is too large to be transmitted by grpc.  If msg is nil, it
-// TODO(ddyihai): eliminate extra Compressor parameter.
+// generates an empty message.
-func encode(c baseCodec, msg interface{}, cp Compressor, outPayload *stats.OutPayload, compressor encoding.Compressor) ([]byte, []byte, error) {
+func encode(c baseCodec, msg interface{}) ([]byte, error) {
-	var (
+	if msg == nil { // NOTE: typed nils will not be caught by this check
-		b    []byte
+		return nil, nil
-		cbuf *bytes.Buffer
+	}
-	)
+	b, err := c.Marshal(msg)
-	const (
+	if err != nil {
-		payloadLen = 1
+		return nil, status.Errorf(codes.Internal, "grpc: error while marshaling: %v", err.Error())
-		sizeLen    = 4
-	)
-	if msg != nil {
-		var err error
-		b, err = c.Marshal(msg)
-		if err != nil {
-			return nil, nil, status.Errorf(codes.Internal, "grpc: error while marshaling: %v", err.Error())
-		}
-		if outPayload != nil {
-			outPayload.Payload = msg
-			// TODO truncate large payload.
-			outPayload.Data = b
-			outPayload.Length = len(b)
-		}
-		if compressor != nil || cp != nil {
-			cbuf = new(bytes.Buffer)
-			// Has compressor, check Compressor is set by UseCompressor first.
-			if compressor != nil {
-				z, _ := compressor.Compress(cbuf)
-				if _, err := z.Write(b); err != nil {
-					return nil, nil, status.Errorf(codes.Internal, "grpc: error while compressing: %v", err.Error())
-				}
-				z.Close()
-			} else {
-				// If Compressor is not set by UseCompressor, use default Compressor
-				if err := cp.Do(cbuf, b); err != nil {
-					return nil, nil, status.Errorf(codes.Internal, "grpc: error while compressing: %v", err.Error())
-				}
-			}
-			b = cbuf.Bytes()
-		}
 	}
 	if uint(len(b)) > math.MaxUint32 {
-		return nil, nil, status.Errorf(codes.ResourceExhausted, "grpc: message too large (%d bytes)", len(b))
+		return nil, status.Errorf(codes.ResourceExhausted, "grpc: message too large (%d bytes)", len(b))
 	}
+	return b, nil
+}
 
-	bufHeader := make([]byte, payloadLen+sizeLen)
+// compress returns the input bytes compressed by compressor or cp.  If both
-	if compressor != nil || cp != nil {
+// compressors are nil, returns nil.
-		bufHeader[0] = byte(compressionMade)
+//
+// TODO(dfawley): eliminate cp parameter by wrapping Compressor in an encoding.Compressor.
+func compress(in []byte, cp Compressor, compressor encoding.Compressor) ([]byte, error) {
+	if compressor == nil && cp == nil {
+		return nil, nil
+	}
+	wrapErr := func(err error) error {
+		return status.Errorf(codes.Internal, "grpc: error while compressing: %v", err.Error())
+	}
+	cbuf := &bytes.Buffer{}
+	if compressor != nil {
+		z, _ := compressor.Compress(cbuf)
+		if _, err := z.Write(in); err != nil {
+			return nil, wrapErr(err)
+		}
+		if err := z.Close(); err != nil {
+			return nil, wrapErr(err)
+		}
 	} else {
-		bufHeader[0] = byte(compressionNone)
+		if err := cp.Do(cbuf, in); err != nil {
+			return nil, wrapErr(err)
+		}
+	}
+	return cbuf.Bytes(), nil
+}
+
+const (
+	payloadLen = 1
+	sizeLen    = 4
+	headerLen  = payloadLen + sizeLen
+)
+
+// msgHeader returns a 5-byte header for the message being transmitted and the
+// payload, which is compData if non-nil or data otherwise.
+func msgHeader(data, compData []byte) (hdr []byte, payload []byte) {
+	hdr = make([]byte, headerLen)
+	if compData != nil {
+		hdr[0] = byte(compressionMade)
+		data = compData
+	} else {
+		hdr[0] = byte(compressionNone)
 	}
 
-	// Write length of b into buf
+	// Write length of payload into buf
-	binary.BigEndian.PutUint32(bufHeader[payloadLen:], uint32(len(b)))
+	binary.BigEndian.PutUint32(hdr[payloadLen:], uint32(len(data)))
-	if outPayload != nil {
+	return hdr, data
-		outPayload.WireLength = payloadLen + sizeLen + len(b)
+}
+
+func outPayload(client bool, msg interface{}, data, payload []byte, t time.Time) *stats.OutPayload {
+	return &stats.OutPayload{
+		Client:     client,
+		Payload:    msg,
+		Data:       data,
+		Length:     len(data),
+		WireLength: len(payload) + headerLen,
+		SentTime:   t,
 	}
-	return bufHeader, b, nil
 }
 
 func checkRecvPayload(pf payloadFormat, recvCompress string, haveCompressor bool) *status.Status {
 	switch pf {
-	case compressionNone:
+	case compressionNone, trailer:
-	case compressionMade:
+	case compressionMade, compressedTrailer:
 		if recvCompress == "" || recvCompress == encoding.Identity {
 			return status.New(codes.Internal, "grpc: compressed flag set with identity or empty encoding")
 		}
@@ -570,7 +591,7 @@ func recv(p *parser, c baseCodec, s *transport.Stream, dc Decompressor, m interf
 		return st.Err()
 	}
 
-	if pf == compressionMade {
+	if pf == compressionMade || pf == compressedTrailer {
 		// To match legacy behavior, if the decompressor is set by WithDecompressor or RPCDecompressor,
 		// use this decompressor as the default.
 		if dc != nil {
@@ -594,6 +615,10 @@ func recv(p *parser, c baseCodec, s *transport.Stream, dc Decompressor, m interf
 		// implementation.
 		return status.Errorf(codes.ResourceExhausted, "grpc: received message larger than max (%d vs. %d)", len(d), maxReceiveMessageSize)
 	}
+	d, err = parseMsg(p, s, maxReceiveMessageSize, pf, d)
+	if err != nil {
+		return err // already a status error (or io.EOF)
+	}
 	if err := c.Unmarshal(d, m); err != nil {
 		return status.Errorf(codes.Internal, "grpc: failed to unmarshal the received message %v", err)
 	}
@@ -721,7 +746,4 @@ const (
 	SupportPackageIsVersion5 = true
 )
 
-// Version is the current grpc version.
-const Version = "1.12.0"
-
 const grpcUA = "grpc-go/" + Version

vendor/google.golang.org/grpc/server.go

@@ -38,13 +38,13 @@ import (
 	"golang.org/x/net/http2"
 	"golang.org/x/net/trace"
 
-	"google.golang.org/grpc/channelz"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/encoding"
 	"google.golang.org/grpc/encoding/proto"
 	"google.golang.org/grpc/grpclog"
 	"google.golang.org/grpc/internal"
+	"google.golang.org/grpc/internal/channelz"
 	"google.golang.org/grpc/keepalive"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/stats"
@@ -827,24 +827,24 @@ func (s *Server) incrCallsFailed() {
 }
 
 func (s *Server) sendResponse(t transport.ServerTransport, stream *transport.Stream, msg interface{}, cp Compressor, opts *transport.Options, comp encoding.Compressor) error {
-	var (
+	data, err := encode(s.getCodec(stream.ContentSubtype()), msg)
-		outPayload *stats.OutPayload
-	)
-	if s.opts.statsHandler != nil {
-		outPayload = &stats.OutPayload{}
-	}
-	hdr, data, err := encode(s.getCodec(stream.ContentSubtype()), msg, cp, outPayload, comp)
 	if err != nil {
 		grpclog.Errorln("grpc: server failed to encode response: ", err)
 		return err
 	}
-	if len(data) > s.opts.maxSendMessageSize {
+	compData, err := compress(data, cp, comp)
-		return status.Errorf(codes.ResourceExhausted, "grpc: trying to send message larger than max (%d vs. %d)", len(data), s.opts.maxSendMessageSize)
+	if err != nil {
+		grpclog.Errorln("grpc: server failed to compress response: ", err)
+		return err
 	}
-	err = t.Write(stream, hdr, data, opts)
+	hdr, payload := msgHeader(data, compData)
-	if err == nil && outPayload != nil {
+	// TODO(dfawley): should we be checking len(data) instead?
-		outPayload.SentTime = time.Now()
+	if len(payload) > s.opts.maxSendMessageSize {
-		s.opts.statsHandler.HandleRPC(stream.Context(), outPayload)
+		return status.Errorf(codes.ResourceExhausted, "grpc: trying to send message larger than max (%d vs. %d)", len(payload), s.opts.maxSendMessageSize)
+	}
+	err = t.Write(stream, hdr, payload, opts)
+	if err == nil && s.opts.statsHandler != nil {
+		s.opts.statsHandler.HandleRPC(stream.Context(), outPayload(false, msg, data, payload, time.Now()))
 	}
 	return err
 }

vendor/google.golang.org/grpc/status/go16.go

@@ -0,0 +1,42 @@
+// +build go1.6,!go1.7
+
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package status
+
+import (
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/codes"
+)
+
+// FromContextError converts a context error into a Status.  It returns a
+// Status with codes.OK if err is nil, or a Status with codes.Unknown if err is
+// non-nil and not a context error.
+func FromContextError(err error) *Status {
+	switch err {
+	case nil:
+		return New(codes.OK, "")
+	case context.DeadlineExceeded:
+		return New(codes.DeadlineExceeded, err.Error())
+	case context.Canceled:
+		return New(codes.Canceled, err.Error())
+	default:
+		return New(codes.Unknown, err.Error())
+	}
+}

vendor/google.golang.org/grpc/status/go17.go

@@ -0,0 +1,44 @@
+// +build go1.7
+
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package status
+
+import (
+	"context"
+
+	netctx "golang.org/x/net/context"
+	"google.golang.org/grpc/codes"
+)
+
+// FromContextError converts a context error into a Status.  It returns a
+// Status with codes.OK if err is nil, or a Status with codes.Unknown if err is
+// non-nil and not a context error.
+func FromContextError(err error) *Status {
+	switch err {
+	case nil:
+		return New(codes.OK, "")
+	case context.DeadlineExceeded, netctx.DeadlineExceeded:
+		return New(codes.DeadlineExceeded, err.Error())
+	case context.Canceled, netctx.Canceled:
+		return New(codes.Canceled, err.Error())
+	default:
+		return New(codes.Unknown, err.Error())
+	}
+}

vendor/google.golang.org/grpc/stickiness_linkedmap.go

@@ -0,0 +1,97 @@
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package grpc
+
+import (
+	"container/list"
+)
+
+type linkedMapKVPair struct {
+	key   string
+	value *stickyStoreEntry
+}
+
+// linkedMap is an implementation of a map that supports removing the oldest
+// entry.
+//
+// linkedMap is NOT thread safe.
+//
+// It's for use of stickiness only!
+type linkedMap struct {
+	m map[string]*list.Element
+	l *list.List // Head of the list is the oldest element.
+}
+
+// newLinkedMap returns a new LinkedMap.
+func newLinkedMap() *linkedMap {
+	return &linkedMap{
+		m: make(map[string]*list.Element),
+		l: list.New(),
+	}
+}
+
+// put adds entry (key, value) to the map. Existing key will be overridden.
+func (m *linkedMap) put(key string, value *stickyStoreEntry) {
+	if oldE, ok := m.m[key]; ok {
+		// Remove existing entry.
+		m.l.Remove(oldE)
+	}
+	e := m.l.PushBack(&linkedMapKVPair{key: key, value: value})
+	m.m[key] = e
+}
+
+// get returns the value of the given key.
+func (m *linkedMap) get(key string) (*stickyStoreEntry, bool) {
+	e, ok := m.m[key]
+	if !ok {
+		return nil, false
+	}
+	m.l.MoveToBack(e)
+	return e.Value.(*linkedMapKVPair).value, true
+}
+
+// remove removes key from the map, and returns the value. The map is not
+// modified if key is not in the map.
+func (m *linkedMap) remove(key string) (*stickyStoreEntry, bool) {
+	e, ok := m.m[key]
+	if !ok {
+		return nil, false
+	}
+	delete(m.m, key)
+	m.l.Remove(e)
+	return e.Value.(*linkedMapKVPair).value, true
+}
+
+// len returns the len of the map.
+func (m *linkedMap) len() int {
+	return len(m.m)
+}
+
+// clear removes all elements from the map.
+func (m *linkedMap) clear() {
+	m.m = make(map[string]*list.Element)
+	m.l = list.New()
+}
+
+// removeOldest removes the oldest key from the map.
+func (m *linkedMap) removeOldest() {
+	e := m.l.Front()
+	m.l.Remove(e)
+	delete(m.m, e.Value.(*linkedMapKVPair).key)
+}

vendor/google.golang.org/grpc/stream.go

@@ -27,9 +27,9 @@ import (
 	"golang.org/x/net/context"
 	"golang.org/x/net/trace"
 	"google.golang.org/grpc/balancer"
-	"google.golang.org/grpc/channelz"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/encoding"
+	"google.golang.org/grpc/internal/channelz"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/stats"
 	"google.golang.org/grpc/status"
@@ -101,8 +101,26 @@ type ClientStream interface {
 }
 
 // NewStream creates a new Stream for the client side. This is typically
-// called by generated code.
+// called by generated code. ctx is used for the lifetime of the stream.
+//
+// To ensure resources are not leaked due to the stream returned, one of the following
+// actions must be performed:
+//
+//      1. Call Close on the ClientConn.
+//      2. Cancel the context provided.
+//      3. Call RecvMsg until a non-nil error is returned. A protobuf-generated
+//         client-streaming RPC, for instance, might use the helper function
+//         CloseAndRecv (note that CloseSend does not Recv, therefore is not
+//         guaranteed to release all resources).
+//      4. Receive a non-nil, non-io.EOF error from Header or SendMsg.
+//
+// If none of the above happen, a goroutine and a context will be leaked, and grpc
+// will not call the optionally-configured stats handler with a stats.End message.
 func (cc *ClientConn) NewStream(ctx context.Context, desc *StreamDesc, method string, opts ...CallOption) (ClientStream, error) {
+	return cc.newStream(ctx, desc, method, opts...)
+}
+
+func (cc *ClientConn) makeStream(ctx context.Context, desc *StreamDesc, method string, opts ...CallOption) (ClientStream, error) {
 	// allow interceptor to see all applicable call options, which means those
 	// configured as defaults from dial option as well as per-call options
 	opts = combine(cc.dopts.callOptions, opts)
@@ -113,8 +131,7 @@ func (cc *ClientConn) NewStream(ctx context.Context, desc *StreamDesc, method st
 	return newClientStream(ctx, desc, cc, method, opts...)
 }
 
-// NewClientStream creates a new Stream for the client side. This is typically
+// NewClientStream is a wrapper for ClientConn.NewStream.
-// called by generated code.
 //
 // DEPRECATED: Use ClientConn.NewStream instead.
 func NewClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, method string, opts ...CallOption) (ClientStream, error) {
@@ -466,27 +483,27 @@ func (a *csAttempt) sendMsg(m interface{}) (err error) {
 		}
 		a.mu.Unlock()
 	}
-	var outPayload *stats.OutPayload
+	data, err := encode(cs.codec, m)
-	if a.statsHandler != nil {
-		outPayload = &stats.OutPayload{
-			Client: true,
-		}
-	}
-	hdr, data, err := encode(cs.codec, m, cs.cp, outPayload, cs.comp)
 	if err != nil {
 		return err
 	}
-	if len(data) > *cs.c.maxSendMessageSize {
+	compData, err := compress(data, cs.cp, cs.comp)
-		return status.Errorf(codes.ResourceExhausted, "trying to send message larger than max (%d vs. %d)", len(data), *cs.c.maxSendMessageSize)
+	if err != nil {
+		return err
 	}
+	hdr, payload := msgHeader(data, compData)
+	// TODO(dfawley): should we be checking len(data) instead?
+	if len(payload) > *cs.c.maxSendMessageSize {
+		return status.Errorf(codes.ResourceExhausted, "trying to send message larger than max (%d vs. %d)", len(payload), *cs.c.maxSendMessageSize)
+	}
+
 	if !cs.desc.ClientStreams {
 		cs.sentLast = true
 	}
-	err = a.t.Write(a.s, hdr, data, &transport.Options{Last: !cs.desc.ClientStreams})
+	err = a.t.Write(a.s, hdr, payload, &transport.Options{Last: !cs.desc.ClientStreams})
 	if err == nil {
-		if outPayload != nil {
+		if a.statsHandler != nil {
-			outPayload.SentTime = time.Now()
+			a.statsHandler.HandleRPC(a.ctx, outPayload(true, m, data, payload, time.Now()))
-			a.statsHandler.HandleRPC(a.ctx, outPayload)
 		}
 		if channelz.IsOn() {
 			a.t.IncrMsgSent()
@@ -696,23 +713,24 @@ func (ss *serverStream) SendMsg(m interface{}) (err error) {
 			ss.t.IncrMsgSent()
 		}
 	}()
-	var outPayload *stats.OutPayload
+	data, err := encode(ss.codec, m)
-	if ss.statsHandler != nil {
-		outPayload = &stats.OutPayload{}
-	}
-	hdr, data, err := encode(ss.codec, m, ss.cp, outPayload, ss.comp)
 	if err != nil {
 		return err
 	}
-	if len(data) > ss.maxSendMessageSize {
+	compData, err := compress(data, ss.cp, ss.comp)
-		return status.Errorf(codes.ResourceExhausted, "trying to send message larger than max (%d vs. %d)", len(data), ss.maxSendMessageSize)
+	if err != nil {
+		return err
 	}
-	if err := ss.t.Write(ss.s, hdr, data, &transport.Options{Last: false}); err != nil {
+	hdr, payload := msgHeader(data, compData)
+	// TODO(dfawley): should we be checking len(data) instead?
+	if len(payload) > ss.maxSendMessageSize {
+		return status.Errorf(codes.ResourceExhausted, "trying to send message larger than max (%d vs. %d)", len(payload), ss.maxSendMessageSize)
+	}
+	if err := ss.t.Write(ss.s, hdr, payload, &transport.Options{Last: false}); err != nil {
 		return toRPCErr(err)
 	}
-	if outPayload != nil {
+	if ss.statsHandler != nil {
-		outPayload.SentTime = time.Now()
+		ss.statsHandler.HandleRPC(ss.s.Context(), outPayload(false, m, data, payload, time.Now()))
-		ss.statsHandler.HandleRPC(ss.s.Context(), outPayload)
 	}
 	return nil
 }

vendor/google.golang.org/grpc/transport/client_transport_js.go

@@ -0,0 +1,266 @@
+// +build js,wasm
+
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package transport
+
+import (
+	"bytes"
+	"io/ioutil"
+	"net/http"
+	"strconv"
+	"strings"
+	"sync/atomic"
+
+	"golang.org/x/net/context"
+	"golang.org/x/net/http2/hpack"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/peer"
+	"google.golang.org/grpc/stats"
+	"google.golang.org/grpc/status"
+)
+
+// newHTTP2Client constructs a connected ClientTransport to addr based on HTTP2
+// and starts to receive messages on it. Non-nil error returns if construction
+// fails.
+func newHTTP2Client(connectCtx, ctx context.Context, addr TargetInfo, opts ConnectOptions, onSuccess func()) (_ ClientTransport, err error) {
+	ctx, cancel := context.WithCancel(ctx)
+	defer func() {
+		if err != nil {
+			cancel()
+		}
+	}()
+
+	t := &http2Client{
+		ctx:                   ctx,
+		cancel:                cancel,
+		md:                    addr.Metadata,
+		readerDone:            make(chan struct{}),
+		writerDone:            make(chan struct{}),
+		goAway:                make(chan struct{}),
+		activeStreams:         make(map[uint32]*Stream),
+		creds:                 opts.PerRPCCredentials,
+		statsHandler:          opts.StatsHandler,
+		initialWindowSize:     initialWindowSize,
+		nextID:                1,
+		maxConcurrentStreams:  defaultMaxStreamsClient,
+		streamQuota:           defaultMaxStreamsClient,
+		streamsQuotaAvailable: make(chan struct{}, 1),
+	}
+	if opts.StatsHandler != nil {
+		t.ctx = opts.StatsHandler.TagConn(t.ctx, &stats.ConnTagInfo{
+			RemoteAddr: t.remoteAddr,
+			LocalAddr:  t.localAddr,
+		})
+		connBegin := &stats.ConnBegin{
+			Client: true,
+		}
+		t.statsHandler.HandleConn(t.ctx, connBegin)
+	}
+	defer onSuccess()
+	return t, nil
+}
+
+func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (*Stream, error) {
+	ctx = peer.NewContext(ctx, t.getPeer())
+	ctx, cancel := context.WithCancel(ctx)
+	s := &Stream{
+		ctx:        ctx,
+		cancel:     cancel,
+		headerChan: make(chan struct{}),
+		respChan:   make(chan struct{}),
+		done:       make(chan struct{}),
+	}
+
+	endpoint := callHdr.Method
+	if callHdr.Host != "" {
+		endpoint = callHdr.Host + "/" + endpoint
+	}
+
+	req, err := http.NewRequest(
+		"POST",
+		endpoint,
+		nil,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	s.req = req.WithContext(s.ctx)
+
+	headerFields, err := t.createHeaderFields(s.ctx, callHdr)
+	if err != nil {
+		return nil, err
+	}
+	for _, hf := range headerFields {
+		// Filter out HTTP2 metadata headers
+		if strings.HasPrefix(hf.Name, ":") {
+			continue
+		}
+		// Don't add the user-agent header
+		if strings.ToLower(hf.Name) == "user-agent" {
+			continue
+		}
+
+		req.Header.Add(hf.Name, hf.Value)
+	}
+
+	// Set gRPC-Web specific headers
+	// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-WEB.md#protocol-differences-vs-grpc-over-http2
+	req.Header.Add("X-Grpc-Web", "1")
+	req.Header.Add("X-User-Agent", "grpc-web-javascript/0.1")
+
+	if t.statsHandler != nil {
+		outHeader := &stats.OutHeader{
+			Client:      true,
+			FullMethod:  callHdr.Method,
+			RemoteAddr:  t.remoteAddr,
+			LocalAddr:   t.localAddr,
+			Compression: callHdr.SendCompress,
+		}
+		t.statsHandler.HandleRPC(s.ctx, outHeader)
+	}
+
+	return s, nil
+}
+
+func (t *http2Client) Write(s *Stream, hdr []byte, data []byte, opts *Options) error {
+	if atomic.SwapUint32(&s.requestSent, 1) == 1 {
+		return status.Error(codes.Unimplemented, "multiple Write's are not supported.")
+	}
+
+	s.req.Body = ioutil.NopCloser(bytes.NewBuffer(append(hdr, data...)))
+
+	resp, err := http.DefaultClient.Do(s.req)
+	if err != nil {
+		return err
+	}
+
+	err = t.operateHeaders(s, resp.Header, &s.req.URL.Path, &resp.StatusCode)
+	if err != nil {
+		resp.Body.Close()
+		s.writeErr = err
+		close(s.respChan)
+		return err
+	}
+
+	s.body = resp.Body
+	close(s.respChan)
+	return nil
+}
+
+func (t *http2Client) Close() error {
+	if t.statsHandler != nil {
+		connEnd := &stats.ConnEnd{
+			Client: true,
+		}
+		t.statsHandler.HandleConn(t.ctx, connEnd)
+	}
+	return nil
+}
+func (t *http2Client) GracefulClose() error {
+	return nil
+}
+func (t *http2Client) GetGoAwayReason() GoAwayReason {
+	return 0
+}
+func (t *http2Client) CloseStream(stream *Stream, err error) {
+	if stream.cancel != nil {
+		stream.cancel()
+	}
+	select {
+	case <-stream.respChan:
+		if stream.body != nil {
+			stream.body.Close()
+		}
+	default:
+	}
+}
+func (t *http2Client) IncrMsgSent() {}
+func (t *http2Client) IncrMsgRecv() {}
+
+func (d *decodeState) decodeResponseHeader(headers http.Header, path *string, status *int) error {
+	for key, values := range headers {
+		for _, value := range values {
+			if err := d.processHeaderField(hpack.HeaderField{Name: strings.ToLower(key), Value: value}); err != nil {
+				return err
+			}
+		}
+	}
+	if path != nil {
+		if err := d.processHeaderField(hpack.HeaderField{Name: ":path", Value: *path}); err != nil {
+			return err
+		}
+	}
+	if status != nil {
+		if err := d.processHeaderField(hpack.HeaderField{Name: ":status", Value: strconv.Itoa(*status)}); err != nil {
+			return err
+		}
+	}
+	return d.validate()
+}
+
+// operateHeaders takes action on the decoded headers.
+func (t *http2Client) operateHeaders(s *Stream, headers http.Header, path *string, status *int) error {
+	atomic.StoreUint32(&s.bytesReceived, 1)
+	var state decodeState
+	if err := state.decodeResponseHeader(headers, path, status); err != nil {
+		return err
+	}
+
+	defer func() {
+		if t != nil && t.statsHandler != nil {
+			inHeader := &stats.InHeader{
+				Client: true,
+			}
+			t.statsHandler.HandleRPC(s.ctx, inHeader)
+		}
+	}()
+	// If headers haven't been received yet.
+	if atomic.SwapUint32(&s.headerDone, 1) == 0 {
+		// These values can be set without any synchronization because
+		// stream goroutine will read it only after seeing a closed
+		// headerChan which we'll close after setting this.
+		s.recvCompress = state.encoding
+		if len(state.mdata) > 0 {
+			s.header = state.mdata
+		}
+		close(s.headerChan)
+	}
+	if state.rawStatusCode == nil || state.rawStatusMsg == "" || state.statusGen == nil {
+		return nil
+	}
+
+	if s.swapState(streamDone) == streamDone {
+		// If it was already done, return.
+		return nil
+	}
+	s.status = state.status()
+	if len(state.mdata) > 0 {
+		s.trailer = state.mdata
+	}
+	close(s.done)
+	return nil
+}
+
+// SetTrailers sets the trailers on the stream. This is unique to the WASM client
+// as trailers are not read by the stream but by the user of the stream.
+func (s *Stream) SetTrailers(trailers http.Header) error {
+	return (*http2Client)(nil).operateHeaders(s, trailers, nil, nil)
+}

vendor/google.golang.org/grpc/transport/content_type.go

@@ -0,0 +1,64 @@
+// +build !js !wasm
+
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package transport
+
+import "strings"
+
+const (
+	// baseContentType is the base content-type for gRPC.  This is a valid
+	// content-type on it's own, but can also include a content-subtype such as
+	// "proto" as a suffix after "+" or ";".  See
+	// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests
+	// for more details.
+	baseContentType = "application/grpc"
+)
+
+// contentSubtype returns the content-subtype for the given content-type.  The
+// given content-type must be a valid content-type that starts with
+// "application/grpc". A content-subtype will follow "application/grpc" after a
+// "+" or ";". See
+// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests for
+// more details.
+//
+// If contentType is not a valid content-type for gRPC, the boolean
+// will be false, otherwise true. If content-type == "application/grpc",
+// "application/grpc+", or "application/grpc;", the boolean will be true,
+// but no content-subtype will be returned.
+//
+// contentType is assumed to be lowercase already.
+func contentSubtype(contentType string) (string, bool) {
+	if contentType == baseContentType {
+		return "", true
+	}
+	if !strings.HasPrefix(contentType, baseContentType) {
+		return "", false
+	}
+	// guaranteed since != baseContentType and has baseContentType prefix
+	switch contentType[len(baseContentType)] {
+	case '+', ';':
+		// this will return true for "application/grpc+" or "application/grpc;"
+		// which the previous validContentType function tested to be valid, so we
+		// just say that no content-subtype is specified in this case
+		return contentType[len(baseContentType)+1:], true
+	default:
+		return "", false
+	}
+}

vendor/google.golang.org/grpc/transport/content_type_js.go

@@ -0,0 +1,68 @@
+// +build js,wasm
+
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package transport
+
+import "strings"
+
+const (
+	// baseContentType is the base content-type for gRPC-web.  This is a valid
+	// content-type on it's own, but can also include a content-subtype such as
+	// "proto" as a suffix after "+" or ";". See
+	// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-WEB.md#protocol-differences-vs-grpc-over-http2
+	// for more details.
+	baseContentType = "application/grpc-web"
+)
+
+// contentSubtype returns the content-subtype for the given content-type.  The
+// given content-type must be a valid content-type that starts with
+// "application/grpc". A content-subtype will follow "application/grpc" after a
+// "+" or ";". See
+// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-WEB.md#protocol-differences-vs-grpc-over-http2
+// for more details.
+//
+// If contentType is not a valid content-type for gRPC, the boolean
+// will be false, otherwise true. If content-type == "application/grpc",
+// "application/grpc+", or "application/grpc;", the boolean will be true,
+// but no content-subtype will be returned.
+//
+// contentType is assumed to be lowercase already.
+func contentSubtype(contentType string) (string, bool) {
+	switch contentType {
+	// We allow application/octet-stream because this
+	// is the content type returned by the browser
+	// when reading a streaming response from a Fetch API request.
+	case baseContentType, "application/octet-stream":
+		return "", true
+	}
+	if !strings.HasPrefix(contentType, baseContentType) {
+		return "", false
+	}
+	// guaranteed since != baseContentType and has baseContentType prefix
+	switch contentType[len(baseContentType)] {
+	case '+', ';':
+		// this will return true for "application/grpc+" or "application/grpc;"
+		// which the previous validContentType function tested to be valid, so we
+		// just say that no content-subtype is specified in this case
+		return contentType[len(baseContentType)+1:], true
+	default:
+		return "", false
+	}
+}

vendor/google.golang.org/grpc/transport/controlbuf.go

@@ -28,6 +28,10 @@ import (
 	"golang.org/x/net/http2/hpack"
 )
 
+var updateHeaderTblSize = func(e *hpack.Encoder, v uint32) {
+	e.SetMaxDynamicTableSizeLimit(v)
+}
+
 type itemNode struct {
 	it   interface{}
 	next *itemNode
@@ -80,6 +84,13 @@ func (il *itemList) isEmpty() bool {
 // the control buffer of transport. They represent different aspects of
 // control tasks, e.g., flow control, settings, streaming resetting, etc.
 
+// registerStream is used to register an incoming stream with loopy writer.
+type registerStream struct {
+	streamID uint32
+	wq       *writeQuota
+}
+
+// headerFrame is also used to register stream on the client-side.
 type headerFrame struct {
 	streamID   uint32
 	hf         []hpack.HeaderField
@@ -361,44 +372,47 @@ func newLoopyWriter(s side, fr *framer, cbuf *controlBuffer, bdpEst *bdpEstimato
 const minBatchSize = 1000
 
 // run should be run in a separate goroutine.
-func (l *loopyWriter) run() {
+func (l *loopyWriter) run() (err error) {
-	var (
-		it      interface{}
-		err     error
-		isEmpty bool
-	)
 	defer func() {
-		errorf("transport: loopyWriter.run returning. Err: %v", err)
+		if err == ErrConnClosing {
+			// Don't log ErrConnClosing as error since it happens
+			// 1. When the connection is closed by some other known issue.
+			// 2. User closed the connection.
+			// 3. A graceful close of connection.
+			infof("transport: loopyWriter.run returning. %v", err)
+			err = nil
+		}
 	}()
 	for {
-		it, err = l.cbuf.get(true)
+		it, err := l.cbuf.get(true)
 		if err != nil {
-			return
+			return err
 		}
 		if err = l.handle(it); err != nil {
-			return
+			return err
 		}
 		if _, err = l.processData(); err != nil {
-			return
+			return err
 		}
 		gosched := true
 	hasdata:
 		for {
-			it, err = l.cbuf.get(false)
+			it, err := l.cbuf.get(false)
 			if err != nil {
-				return
+				return err
 			}
 			if it != nil {
 				if err = l.handle(it); err != nil {
-					return
+					return err
 				}
 				if _, err = l.processData(); err != nil {
-					return
+					return err
 				}
 				continue hasdata
 			}
-			if isEmpty, err = l.processData(); err != nil {
+			isEmpty, err := l.processData()
-				return
+			if err != nil {
+				return err
 			}
 			if !isEmpty {
 				continue hasdata
@@ -450,30 +464,39 @@ func (l *loopyWriter) incomingSettingsHandler(s *incomingSettings) error {
 	return l.framer.fr.WriteSettingsAck()
 }
 
+func (l *loopyWriter) registerStreamHandler(h *registerStream) error {
+	str := &outStream{
+		id:    h.streamID,
+		state: empty,
+		itl:   &itemList{},
+		wq:    h.wq,
+	}
+	l.estdStreams[h.streamID] = str
+	return nil
+}
+
 func (l *loopyWriter) headerHandler(h *headerFrame) error {
 	if l.side == serverSide {
-		if h.endStream { // Case 1.A: Server wants to close stream.
+		str, ok := l.estdStreams[h.streamID]
-			// Make sure it's not a trailers only response.
+		if !ok {
-			if str, ok := l.estdStreams[h.streamID]; ok {
+			warningf("transport: loopy doesn't recognize the stream: %d", h.streamID)
-				if str.state != empty { // either active or waiting on stream quota.
+			return nil
-					// add it str's list of items.
-					str.itl.enqueue(h)
-					return nil
-				}
-			}
-			if err := l.writeHeader(h.streamID, h.endStream, h.hf, h.onWrite); err != nil {
-				return err
-			}
-			return l.cleanupStreamHandler(h.cleanup)
 		}
-		// Case 1.B: Server is responding back with headers.
+		// Case 1.A: Server is responding back with headers.
-		str := &outStream{
+		if !h.endStream {
-			state: empty,
+			return l.writeHeader(h.streamID, h.endStream, h.hf, h.onWrite)
-			itl:   &itemList{},
-			wq:    h.wq,
 		}
-		l.estdStreams[h.streamID] = str
+		// else:  Case 1.B: Server wants to close stream.
-		return l.writeHeader(h.streamID, h.endStream, h.hf, h.onWrite)
+
+		if str.state != empty { // either active or waiting on stream quota.
+			// add it str's list of items.
+			str.itl.enqueue(h)
+			return nil
+		}
+		if err := l.writeHeader(h.streamID, h.endStream, h.hf, h.onWrite); err != nil {
+			return err
+		}
+		return l.cleanupStreamHandler(h.cleanup)
 	}
 	// Case 2: Client wants to originate stream.
 	str := &outStream{
@@ -632,6 +655,8 @@ func (l *loopyWriter) handle(i interface{}) error {
 		return l.outgoingSettingsHandler(i)
 	case *headerFrame:
 		return l.headerHandler(i)
+	case *registerStream:
+		return l.registerStreamHandler(i)
 	case *cleanupStream:
 		return l.cleanupStreamHandler(i)
 	case *incomingGoAway:
@@ -664,6 +689,8 @@ func (l *loopyWriter) applySettings(ss []http2.Setting) error {
 					}
 				}
 			}
+		case http2.SettingHeaderTableSize:
+			updateHeaderTblSize(l.hEnc, s.Val)
 		}
 	}
 	return nil

vendor/google.golang.org/grpc/transport/flowcontrol.go

@@ -58,14 +58,20 @@ type writeQuota struct {
 	ch chan struct{}
 	// done is triggered in error case.
 	done <-chan struct{}
+	// replenish is called by loopyWriter to give quota back to.
+	// It is implemented as a field so that it can be updated
+	// by tests.
+	replenish func(n int)
 }
 
 func newWriteQuota(sz int32, done <-chan struct{}) *writeQuota {
-	return &writeQuota{
+	w := &writeQuota{
 		quota: sz,
 		ch:    make(chan struct{}, 1),
 		done:  done,
 	}
+	w.replenish = w.realReplenish
+	return w
 }
 
 func (w *writeQuota) get(sz int32) error {
@@ -83,7 +89,7 @@ func (w *writeQuota) get(sz int32) error {
 	}
 }
 
-func (w *writeQuota) replenish(n int) {
+func (w *writeQuota) realReplenish(n int) {
 	sz := int32(n)
 	a := atomic.AddInt32(&w.quota, sz)
 	b := a - sz

vendor/google.golang.org/grpc/transport/http2_server.go

@@ -24,7 +24,6 @@ import (
 	"fmt"
 	"io"
 	"math"
-	"math/rand"
 	"net"
 	"strconv"
 	"sync"
@@ -36,9 +35,11 @@ import (
 	"golang.org/x/net/http2"
 	"golang.org/x/net/http2/hpack"
 
-	"google.golang.org/grpc/channelz"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/grpclog"
+	"google.golang.org/grpc/internal/channelz"
+	"google.golang.org/grpc/internal/grpcrand"
 	"google.golang.org/grpc/keepalive"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/peer"
@@ -273,7 +274,9 @@ func newHTTP2Server(conn net.Conn, config *ServerConfig) (_ ServerTransport, err
 	go func() {
 		t.loopy = newLoopyWriter(serverSide, t.framer, t.controlBuf, t.bdpEst)
 		t.loopy.ssGoAwayHandler = t.outgoingGoAwayHandler
-		t.loopy.run()
+		if err := t.loopy.run(); err != nil {
+			errorf("transport: loopyWriter.run returning. Err: %v", err)
+		}
 		t.conn.Close()
 		close(t.writerDone)
 	}()
@@ -413,6 +416,11 @@ func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(
 			t.updateWindow(s, uint32(n))
 		},
 	}
+	// Register the stream with loopy.
+	t.controlBuf.put(&registerStream{
+		streamID: s.id,
+		wq:       s.wq,
+	})
 	handle(s)
 	return
 }
@@ -682,28 +690,7 @@ func (t *http2Server) handleWindowUpdate(f *http2.WindowUpdateFrame) {
 	})
 }
 
-// WriteHeader sends the header metedata md back to the client.
+func appendHeaderFieldsFromMD(headerFields []hpack.HeaderField, md metadata.MD) []hpack.HeaderField {
-func (t *http2Server) WriteHeader(s *Stream, md metadata.MD) error {
-	if s.headerOk || s.getState() == streamDone {
-		return ErrIllegalHeaderWrite
-	}
-	s.headerOk = true
-	if md.Len() > 0 {
-		if s.header.Len() > 0 {
-			s.header = metadata.Join(s.header, md)
-		} else {
-			s.header = md
-		}
-	}
-	md = s.header
-	// TODO(mmukhi): Benchmark if the performance gets better if count the metadata and other header fields
-	// first and create a slice of that exact size.
-	headerFields := make([]hpack.HeaderField, 0, 2) // at least :status, content-type will be there if none else.
-	headerFields = append(headerFields, hpack.HeaderField{Name: ":status", Value: "200"})
-	headerFields = append(headerFields, hpack.HeaderField{Name: "content-type", Value: contentType(s.contentSubtype)})
-	if s.sendCompress != "" {
-		headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-encoding", Value: s.sendCompress})
-	}
 	for k, vv := range md {
 		if isReservedHeader(k) {
 			// Clients don't tolerate reading restricted headers after some non restricted ones were sent.
@@ -713,6 +700,37 @@ func (t *http2Server) WriteHeader(s *Stream, md metadata.MD) error {
 			headerFields = append(headerFields, hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)})
 		}
 	}
+	return headerFields
+}
+
+// WriteHeader sends the header metedata md back to the client.
+func (t *http2Server) WriteHeader(s *Stream, md metadata.MD) error {
+	if s.updateHeaderSent() || s.getState() == streamDone {
+		return ErrIllegalHeaderWrite
+	}
+	s.hdrMu.Lock()
+	if md.Len() > 0 {
+		if s.header.Len() > 0 {
+			s.header = metadata.Join(s.header, md)
+		} else {
+			s.header = md
+		}
+	}
+	t.writeHeaderLocked(s)
+	s.hdrMu.Unlock()
+	return nil
+}
+
+func (t *http2Server) writeHeaderLocked(s *Stream) {
+	// TODO(mmukhi): Benchmark if the performance gets better if count the metadata and other header fields
+	// first and create a slice of that exact size.
+	headerFields := make([]hpack.HeaderField, 0, 2) // at least :status, content-type will be there if none else.
+	headerFields = append(headerFields, hpack.HeaderField{Name: ":status", Value: "200"})
+	headerFields = append(headerFields, hpack.HeaderField{Name: "content-type", Value: contentType(s.contentSubtype)})
+	if s.sendCompress != "" {
+		headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-encoding", Value: s.sendCompress})
+	}
+	headerFields = appendHeaderFieldsFromMD(headerFields, s.header)
 	t.controlBuf.put(&headerFrame{
 		streamID:  s.id,
 		hf:        headerFields,
@@ -720,7 +738,6 @@ func (t *http2Server) WriteHeader(s *Stream, md metadata.MD) error {
 		onWrite: func() {
 			atomic.StoreUint32(&t.resetPingStrikes, 1)
 		},
-		wq: s.wq,
 	})
 	if t.stats != nil {
 		// Note: WireLength is not set in outHeader.
@@ -728,7 +745,6 @@ func (t *http2Server) WriteHeader(s *Stream, md metadata.MD) error {
 		outHeader := &stats.OutHeader{}
 		t.stats.HandleRPC(s.Context(), outHeader)
 	}
-	return nil
 }
 
 // WriteStatus sends stream status to the client and terminates the stream.
@@ -736,21 +752,20 @@ func (t *http2Server) WriteHeader(s *Stream, md metadata.MD) error {
 // TODO(zhaoq): Now it indicates the end of entire stream. Revisit if early
 // OK is adopted.
 func (t *http2Server) WriteStatus(s *Stream, st *status.Status) error {
-	if !s.headerOk && s.header.Len() > 0 {
+	if s.getState() == streamDone {
-		if err := t.WriteHeader(s, nil); err != nil {
+		return nil
-			return err
-		}
-	} else {
-		if s.getState() == streamDone {
-			return nil
-		}
 	}
+	s.hdrMu.Lock()
 	// TODO(mmukhi): Benchmark if the performance gets better if count the metadata and other header fields
 	// first and create a slice of that exact size.
 	headerFields := make([]hpack.HeaderField, 0, 2) // grpc-status and grpc-message will be there if none else.
-	if !s.headerOk {
+	if !s.updateHeaderSent() {                      // No headers have been sent.
-		headerFields = append(headerFields, hpack.HeaderField{Name: ":status", Value: "200"})
+		if len(s.header) > 0 { // Send a separate header frame.
-		headerFields = append(headerFields, hpack.HeaderField{Name: "content-type", Value: contentType(s.contentSubtype)})
+			t.writeHeaderLocked(s)
+		} else { // Send a trailer only response.
+			headerFields = append(headerFields, hpack.HeaderField{Name: ":status", Value: "200"})
+			headerFields = append(headerFields, hpack.HeaderField{Name: "content-type", Value: contentType(s.contentSubtype)})
+		}
 	}
 	headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-status", Value: strconv.Itoa(int(st.Code()))})
 	headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-message", Value: encodeGrpcMessage(st.Message())})
@@ -759,23 +774,15 @@ func (t *http2Server) WriteStatus(s *Stream, st *status.Status) error {
 		stBytes, err := proto.Marshal(p)
 		if err != nil {
 			// TODO: return error instead, when callers are able to handle it.
-			panic(err)
+			grpclog.Errorf("transport: failed to marshal rpc status: %v, error: %v", p, err)
+		} else {
+			headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-status-details-bin", Value: encodeBinHeader(stBytes)})
 		}
-
-		headerFields = append(headerFields, hpack.HeaderField{Name: "grpc-status-details-bin", Value: encodeBinHeader(stBytes)})
 	}
 
 	// Attach the trailer metadata.
-	for k, vv := range s.trailer {
+	headerFields = appendHeaderFieldsFromMD(headerFields, s.trailer)
-		// Clients don't tolerate reading restricted headers after some non restricted ones were sent.
+	trailingHeader := &headerFrame{
-		if isReservedHeader(k) {
-			continue
-		}
-		for _, v := range vv {
-			headerFields = append(headerFields, hpack.HeaderField{Name: k, Value: encodeMetadataHeader(k, v)})
-		}
-	}
-	trailer := &headerFrame{
 		streamID:  s.id,
 		hf:        headerFields,
 		endStream: true,
@@ -783,7 +790,8 @@ func (t *http2Server) WriteStatus(s *Stream, st *status.Status) error {
 			atomic.StoreUint32(&t.resetPingStrikes, 1)
 		},
 	}
-	t.closeStream(s, false, 0, trailer, true)
+	s.hdrMu.Unlock()
+	t.closeStream(s, false, 0, trailingHeader, true)
 	if t.stats != nil {
 		t.stats.HandleRPC(s.Context(), &stats.OutTrailer{})
 	}
@@ -793,7 +801,7 @@ func (t *http2Server) WriteStatus(s *Stream, st *status.Status) error {
 // Write converts the data into HTTP2 data frame and sends it out. Non-nil error
 // is returns if it fails (e.g., framing error, transport error).
 func (t *http2Server) Write(s *Stream, hdr []byte, data []byte, opts *Options) error {
-	if !s.headerOk { // Headers haven't been written yet.
+	if !s.isHeaderSent() { // Headers haven't been written yet.
 		if err := t.WriteHeader(s, nil); err != nil {
 			// TODO(mmukhi, dfawley): Make sure this is the right code to return.
 			return streamErrorf(codes.Internal, "transport: %v", err)
@@ -1123,14 +1131,12 @@ func (t *http2Server) getOutFlowWindow() int64 {
 	}
 }
 
-var rgen = rand.New(rand.NewSource(time.Now().UnixNano()))
-
 func getJitter(v time.Duration) time.Duration {
 	if v == infinity {
 		return 0
 	}
 	// Generate a jitter between +/- 10% of the value.
 	r := int64(v / 10)
-	j := rgen.Int63n(2*r) - r
+	j := grpcrand.Int63n(2*r) - r
 	return time.Duration(j)
 }

vendor/google.golang.org/grpc/transport/http_util.go

@@ -28,6 +28,7 @@ import (
 	"strconv"
 	"strings"
 	"time"
+	"unicode/utf8"
 
 	"github.com/golang/protobuf/proto"
 	"golang.org/x/net/http2"
@@ -45,12 +46,6 @@ const (
 	// http2IOBufSize specifies the buffer size for sending frames.
 	defaultWriteBufSize = 32 * 1024
 	defaultReadBufSize  = 32 * 1024
-	// baseContentType is the base content-type for gRPC.  This is a valid
-	// content-type on it's own, but can also include a content-subtype such as
-	// "proto" as a suffix after "+" or ";".  See
-	// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests
-	// for more details.
-	baseContentType = "application/grpc"
 )
 
 var (
@@ -156,38 +151,6 @@ func isWhitelistedHeader(hdr string) bool {
 	}
 }
 
-// contentSubtype returns the content-subtype for the given content-type.  The
-// given content-type must be a valid content-type that starts with
-// "application/grpc". A content-subtype will follow "application/grpc" after a
-// "+" or ";". See
-// https://github.com/grpc/grpc/blob/master/doc/PROTOCOL-HTTP2.md#requests for
-// more details.
-//
-// If contentType is not a valid content-type for gRPC, the boolean
-// will be false, otherwise true. If content-type == "application/grpc",
-// "application/grpc+", or "application/grpc;", the boolean will be true,
-// but no content-subtype will be returned.
-//
-// contentType is assumed to be lowercase already.
-func contentSubtype(contentType string) (string, bool) {
-	if contentType == baseContentType {
-		return "", true
-	}
-	if !strings.HasPrefix(contentType, baseContentType) {
-		return "", false
-	}
-	// guaranteed since != baseContentType and has baseContentType prefix
-	switch contentType[len(baseContentType)] {
-	case '+', ';':
-		// this will return true for "application/grpc+" or "application/grpc;"
-		// which the previous validContentType function tested to be valid, so we
-		// just say that no content-subtype is specified in this case
-		return contentType[len(baseContentType)+1:], true
-	default:
-		return "", false
-	}
-}
-
 // contentSubtype is assumed to be lowercase
 func contentType(contentSubtype string) string {
 	if contentSubtype == "" {
@@ -233,13 +196,7 @@ func decodeMetadataHeader(k, v string) (string, error) {
 	return v, nil
 }
 
-func (d *decodeState) decodeResponseHeader(frame *http2.MetaHeadersFrame) error {
+func (d *decodeState) validate() error {
-	for _, hf := range frame.Fields {
-		if err := d.processHeaderField(hf); err != nil {
-			return err
-		}
-	}
-
 	// If grpc status exists, no need to check further.
 	if d.rawStatusCode != nil || d.statusGen != nil {
 		return nil
@@ -437,16 +394,17 @@ func decodeTimeout(s string) (time.Duration, error) {
 
 const (
 	spaceByte   = ' '
-	tildaByte   = '~'
+	tildeByte   = '~'
 	percentByte = '%'
 )
 
 // encodeGrpcMessage is used to encode status code in header field
-// "grpc-message".
+// "grpc-message". It does percent encoding and also replaces invalid utf-8
-// It checks to see if each individual byte in msg is an
+// characters with Unicode replacement character.
-// allowable byte, and then either percent encoding or passing it through.
+//
-// When percent encoding, the byte is converted into hexadecimal notation
+// It checks to see if each individual byte in msg is an allowable byte, and
-// with a '%' prepended.
+// then either percent encoding or passing it through. When percent encoding,
+// the byte is converted into hexadecimal notation with a '%' prepended.
 func encodeGrpcMessage(msg string) string {
 	if msg == "" {
 		return ""
@@ -454,7 +412,7 @@ func encodeGrpcMessage(msg string) string {
 	lenMsg := len(msg)
 	for i := 0; i < lenMsg; i++ {
 		c := msg[i]
-		if !(c >= spaceByte && c < tildaByte && c != percentByte) {
+		if !(c >= spaceByte && c <= tildeByte && c != percentByte) {
 			return encodeGrpcMessageUnchecked(msg)
 		}
 	}
@@ -463,14 +421,26 @@ func encodeGrpcMessage(msg string) string {
 
 func encodeGrpcMessageUnchecked(msg string) string {
 	var buf bytes.Buffer
-	lenMsg := len(msg)
+	for len(msg) > 0 {
-	for i := 0; i < lenMsg; i++ {
+		r, size := utf8.DecodeRuneInString(msg)
-		c := msg[i]
+		for _, b := range []byte(string(r)) {
-		if c >= spaceByte && c < tildaByte && c != percentByte {
+			if size > 1 {
-			buf.WriteByte(c)
+				// If size > 1, r is not ascii. Always do percent encoding.
-		} else {
+				buf.WriteString(fmt.Sprintf("%%%02X", b))
-			buf.WriteString(fmt.Sprintf("%%%02X", c))
+				continue
+			}
+
+			// The for loop is necessary even if size == 1. r could be
+			// utf8.RuneError.
+			//
+			// fmt.Sprintf("%%%02X", utf8.RuneError) gives "%FFFD".
+			if b >= spaceByte && b <= tildeByte && b != percentByte {
+				buf.WriteByte(b)
+			} else {
+				buf.WriteString(fmt.Sprintf("%%%02X", b))
+			}
 		}
+		msg = msg[size:]
 	}
 	return buf.String()
 }
@@ -531,10 +501,14 @@ func (w *bufWriter) Write(b []byte) (n int, err error) {
 	if w.err != nil {
 		return 0, w.err
 	}
-	n = copy(w.buf[w.offset:], b)
+	for len(b) > 0 {
-	w.offset += n
+		nn := copy(w.buf[w.offset:], b)
-	if w.offset >= w.batchSize {
+		b = b[nn:]
-		err = w.Flush()
+		w.offset += nn
+		n += nn
+		if w.offset >= w.batchSize {
+			err = w.Flush()
+		}
 	}
 	return n, err
 }

vendor/google.golang.org/grpc/transport/stream.go

@@ -0,0 +1,35 @@
+// +build !js !wasm
+
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package transport
+
+import (
+	"io"
+)
+
+// Read reads all p bytes from the wire for this stream.
+func (s *Stream) Read(p []byte) (n int, err error) {
+	// Don't request a read if there was an error earlier
+	if er := s.trReader.(*transportReader).er; er != nil {
+		return 0, er
+	}
+	s.requestRead(len(p))
+	return io.ReadFull(s.trReader, p)
+}

vendor/google.golang.org/grpc/transport/stream_js.go

@@ -0,0 +1,40 @@
+// +build js,wasm
+
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package transport
+
+import (
+	"io"
+)
+
+// Read reads all p bytes from the wire for this stream.
+func (s *Stream) Read(p []byte) (n int, err error) {
+	// block until body has been set
+	select {
+	case <-s.ctx.Done():
+		return 0, s.ctx.Err()
+	case <-s.respChan:
+		if s.writeErr != nil {
+			return 0, s.writeErr
+		}
+		n, err := io.ReadFull(s.body, p)
+		return n, err
+	}
+}

vendor/google.golang.org/grpc/transport/transport.go

@@ -26,6 +26,7 @@ import (
 	"fmt"
 	"io"
 	"net"
+	"net/http"
 	"sync"
 	"sync/atomic"
 
@@ -185,13 +186,20 @@ type Stream struct {
 
 	headerChan chan struct{} // closed to indicate the end of header metadata.
 	headerDone uint32        // set when headerChan is closed. Used to avoid closing headerChan multiple times.
-	header     metadata.MD   // the received header metadata.
-	trailer    metadata.MD   // the key-value map of trailer metadata.
 
-	headerOk bool // becomes true from the first header is about to send
+	// hdrMu protects header and trailer metadata on the server-side.
-	state    streamState
+	hdrMu   sync.Mutex
+	header  metadata.MD // the received header metadata.
+	trailer metadata.MD // the key-value map of trailer metadata.
 
-	status *status.Status // the status error received from the server
+	// On the server-side, headerSent is atomically set to 1 when the headers are sent out.
+	headerSent uint32
+
+	state streamState
+
+	// On client-side it is the status error received from the server.
+	// On server-side it is unused.
+	status *status.Status
 
 	bytesReceived uint32 // indicates whether any bytes have been received on this stream
 	unprocessed   uint32 // set if the server sends a refused stream or GOAWAY including this stream
@@ -199,6 +207,24 @@ type Stream struct {
 	// contentSubtype is the content-subtype for requests.
 	// this must be lowercase or the behavior is undefined.
 	contentSubtype string
+
+	// only used by WASM clients
+	req         *http.Request
+	requestSent uint32 // indicates that the request has been sent
+	body        io.ReadCloser
+	writeErr    error
+	respChan    chan struct{} // closed to indicate the body or writeErr has been set.
+}
+
+// isHeaderSent is only valid on the server-side.
+func (s *Stream) isHeaderSent() bool {
+	return atomic.LoadUint32(&s.headerSent) == 1
+}
+
+// updateHeaderSent updates headerSent and returns true
+// if it was alreay set. It is valid only on server-side.
+func (s *Stream) updateHeaderSent() bool {
+	return atomic.SwapUint32(&s.headerSent, 1) == 1
 }
 
 func (s *Stream) swapState(st streamState) streamState {
@@ -313,10 +339,12 @@ func (s *Stream) SetHeader(md metadata.MD) error {
 	if md.Len() == 0 {
 		return nil
 	}
-	if s.headerOk || atomic.LoadUint32((*uint32)(&s.state)) == uint32(streamDone) {
+	if s.isHeaderSent() || s.getState() == streamDone {
 		return ErrIllegalHeaderWrite
 	}
+	s.hdrMu.Lock()
 	s.header = metadata.Join(s.header, md)
+	s.hdrMu.Unlock()
 	return nil
 }
 
@@ -335,7 +363,12 @@ func (s *Stream) SetTrailer(md metadata.MD) error {
 	if md.Len() == 0 {
 		return nil
 	}
+	if s.getState() == streamDone {
+		return ErrIllegalHeaderWrite
+	}
+	s.hdrMu.Lock()
 	s.trailer = metadata.Join(s.trailer, md)
+	s.hdrMu.Unlock()
 	return nil
 }
 
@@ -343,16 +376,6 @@ func (s *Stream) write(m recvMsg) {
 	s.buf.put(m)
 }
 
-// Read reads all p bytes from the wire for this stream.
-func (s *Stream) Read(p []byte) (n int, err error) {
-	// Don't request a read if there was an error earlier
-	if er := s.trReader.(*transportReader).er; er != nil {
-		return 0, er
-	}
-	s.requestRead(len(p))
-	return io.ReadFull(s.trReader, p)
-}
-
 // tranportReader reads all the data available for this Stream from the transport and
 // passes them into the decoder, which converts them into a gRPC message stream.
 // The error is io.EOF when the stream is done or another non-nil error if

vendor/google.golang.org/grpc/version.go

@@ -0,0 +1,22 @@
+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package grpc
+
+// Version is the current grpc version.
+const Version = "1.14.0-dev"

vendor/google.golang.org/grpc/vet.sh

@@ -54,7 +54,8 @@ if git status --porcelain | read; then
 fi
 
 git ls-files "*.go" | xargs grep -L "\(Copyright [0-9]\{4,\} gRPC authors\)\|DO NOT EDIT" 2>&1 | tee /dev/stderr | (! read)
-git ls-files "*.go" | xargs grep -l "\"unsafe\"" 2>&1 | (! grep -v '_test.go') | tee /dev/stderr | (! read)
+git ls-files "*.go" | xargs grep -l '"unsafe"' 2>&1 | (! grep -v '_test.go') | tee /dev/stderr | (! read)
+git ls-files "*.go" | xargs grep -l '"math/rand"' 2>&1 | (! grep -v '^examples\|^stress\|grpcrand') | tee /dev/stderr | (! read)
 gofmt -s -d -l . 2>&1 | tee /dev/stderr | (! read)
 goimports -l . 2>&1 | tee /dev/stderr | (! read)
 golint ./... 2>&1 | (grep -vE "(_mock|\.pb)\.go:" || true) | tee /dev/stderr | (! read)