1
0
mirror of https://github.com/taigrr/log-socket synced 2026-03-20 16:02:28 -07:00

18 Commits

Author SHA1 Message Date
5cb1329155 feat(slog): add slog.Handler adapter (#20)
* docs: add example programs for common usage patterns

Adds four focused examples in examples/ directory:
- basic: drop-in logger with web UI
- namespaces: namespace-based logging by component
- client: programmatic log client with filtering
- log-levels: all log levels and filtering

Fixes #7

* feat(slog): add slog.Handler adapter for log-socket

Implements log/slog.Handler that routes structured log records into the
log-socket broadcasting system. Supports namespaces, WithAttrs,
WithGroup, and configurable minimum level.

Also adds Broadcast() as a public entry point for adapter packages
that construct log.Entry values directly.

* chore: update to Go 1.26, resolve slog LogValuer values
2026-03-01 22:48:12 -05:00
e725622696 docs: add example programs for common usage patterns (#19)
Adds four focused examples in examples/ directory:
- basic: drop-in logger with web UI
- namespaces: namespace-based logging by component
- client: programmatic log client with filtering
- log-levels: all log levels and filtering

Fixes #7
2026-02-22 21:21:31 -05:00
47bfb5ed98 fix: stderr namespace filter, fileInfo depth, panic guard, race safety
- fix(stderr): CreateClient() with no args so stderr sees all namespaces,
  not just 'default'. Previously namespaced logs were invisible on stderr.
- fix(logger): fileInfo depth offset to 2+FileInfoDepth so Logger methods
  report the actual caller, not the log package itself. Default depth (0)
  now correctly shows caller file:line.
- fix(panic): guard args[0] access with len(args) > 0 instead of >= 0.
  Panic/Panicf/Panicln would index out of range when called with no args.
- fix(createLog): nil/initialized check before channel send to prevent
  race with concurrent Destroy calls.
- chore: bump go.mod to 1.25.6
2026-02-17 08:31:21 +00:00
6a709d3963 feat(log): add colored terminal output without external packages (#16)
Adds ANSI color-coded log levels for terminal output:
- TRACE: Gray
- DEBUG: Cyan
- INFO: Green
- NOTICE: Blue
- WARN: Yellow
- ERROR/PANIC/FATAL: Red (bold for PANIC/FATAL)

Colors are auto-detected based on terminal capability and can be
controlled via SetColorEnabled()/ColorEnabled().

Fixes #9
2026-02-17 03:27:53 -05:00
0a78d1ce90 test: add comprehensive benchmark suite (#18)
Adds benchmarks for all log levels (Trace, Debug, Info, Warn, Error),
formatted logging, multiple client fan-out, parallel writes, namespace
filtering, and component-level benchmarks (fileInfo, entry creation).

Uses isolated namespaces to avoid interference with the stderr client.

Fixes #6
2026-02-17 03:25:12 -05:00
93dd230be0 update test version 2025-11-10 16:08:40 -05:00
f86c2dbf46 enable namespaced logging 2025-11-10 16:07:28 -05:00
Daniel Merja
9c571ca955 Update screenshot image in the browser directory 2025-06-29 19:53:24 -07:00
Daniel Merja
45ba154d1e Update Go version to 1.24.4 and overhaul viewer.html with a complete redesign for improved log display and user interaction. (#13) 2025-06-29 02:11:12 -07:00
c89dda8333 error -> warn for broken connection 2025-06-29 00:43:55 -07:00
41aad10e6c add upgrader option 2025-06-29 00:10:09 -07:00
64ab2564c1 upgrade workflow to match go.mod 2025-05-01 18:30:13 -07:00
1c00bc90b8 upgrade deps, readme 2025-05-01 18:27:46 -07:00
f114098a8c uodate go version 2023-08-26 22:00:42 -07:00
Ethan Holz
2571dbe347 Add Github Actions for automated testing (#12)
* ci: Added initial github action for automated testing

* fix: changed go version

* ci: updated to change job name to test
2023-05-13 23:27:20 -07:00
80b80758de Add Default() func 2023-03-29 14:26:06 -07:00
0fa4de7961 Revert "add ability to embed other loggers of varying functionality"
This reverts commit 50c507c8f4.
2023-03-29 14:06:00 -07:00
50c507c8f4 add ability to embed other loggers of varying functionality 2023-03-29 14:02:57 -07:00
24 changed files with 2561 additions and 317 deletions

23
.github/workflows/ci.yaml vendored Normal file
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@@ -0,0 +1,23 @@
name: Go package
on: [push]
jobs:
test:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v3
- name: Set up Go
uses: actions/setup-go@v4
with:
go-version: "1.25"
- name: Install dependencies
run: go get .
- name: Build
run: go build -v ./...
- name: Test
run: go test -v ./...

501
CRUSH.md Normal file
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@@ -0,0 +1,501 @@
# CRUSH.md - Log Socket v2 Development Guide
This document provides context and conventions for working on **log-socket v2** - a real-time log viewer with WebSocket support and namespace filtering, written in Go.
## Project Overview
Log Socket v2 is a Go library and standalone application that provides:
- Real-time log streaming via WebSocket
- **Namespace-based log organization** (NEW in v2)
- Web-based log viewer with namespace filtering
- Support for multiple log levels (TRACE, DEBUG, INFO, NOTICE, WARN, ERROR, PANIC, FATAL)
- Client architecture allowing multiple subscribers to filtered log streams
**Key insight**: This is both a library (importable Go package) and a standalone application. The main.go serves as an example implementation.
## Essential Commands
### Build
```bash
go build -v ./...
```
### Run Server
```bash
# Default (runs on 0.0.0.0:8080)
go run main.go
# Custom address
go run main.go -addr localhost:8080
```
Once running, open browser to `http://localhost:8080` to view logs.
### Test
```bash
go test -v ./...
```
### Install
```bash
go install github.com/taigrr/log-socket/v2@latest
```
### Dependencies
```bash
go get .
```
## Project Structure
```
.
├── main.go # Example server with multiple namespaces
├── log/ # Core logging package
│ ├── log.go # Package-level logging functions + namespace tracking
│ ├── logger.go # Logger type with namespace support
│ ├── types.go # Type definitions (includes Namespace fields)
│ └── log_test.go # Tests
├── ws/ # WebSocket server
│ ├── server.go # LogSocketHandler with namespace filtering
│ └── namespaces.go # HTTP handler for namespace list API
└── browser/ # Web UI
├── browser.go # HTTP handler serving embedded HTML
└── viewer.html # Embedded web interface with namespace filter
```
## Major Changes in v2
### Module Path
- **v1**: `github.com/taigrr/log-socket`
- **v2**: `github.com/taigrr/log-socket/v2`
### Namespace Support
**Core concept**: Namespaces allow organizing logs by component, service, or domain (e.g., "api", "database", "auth").
#### Types Changes
**Entry** now includes:
```go
type Entry struct {
Timestamp time.Time `json:"timestamp"`
Output string `json:"output"`
File string `json:"file"`
Level string `json:"level"`
Namespace string `json:"namespace"` // NEW
level Level
}
```
**Client** now uses a slice for filtering:
```go
type Client struct {
LogLevel Level `json:"level"`
Namespaces []string `json:"namespaces"` // Empty = all namespaces
writer LogWriter
initialized bool
}
```
**Logger** has namespace field:
```go
type Logger struct {
FileInfoDepth int
Namespace string // NEW
}
```
#### API Changes
**CreateClient** now variadic:
```go
// v1
func CreateClient() *Client
// v2
func CreateClient(namespaces ...string) *Client
// Examples:
client := log.CreateClient() // All namespaces
client := log.CreateClient("api") // Single namespace
client := log.CreateClient("api", "database") // Multiple namespaces
```
**NewLogger** constructor added:
```go
func NewLogger(namespace string) *Logger
// Example:
apiLogger := log.NewLogger("api")
apiLogger.Info("API request received")
```
### Namespace Tracking
Global namespace registry tracks all used namespaces:
```go
var (
namespaces map[string]bool
namespacesMux sync.RWMutex
)
func GetNamespaces() []string
```
Namespaces are automatically registered when logs are created.
### WebSocket Changes
**Query parameter for filtering**:
```
ws://localhost:8080/ws?namespaces=api,database
```
The handler parses comma-separated namespace list and creates a filtered client.
### Web UI Changes
- Namespace filter input field added to controls
- Namespace column added to log table
- Reconnect button to apply namespace filter
- WebSocket URL includes namespace query parameter
## Code Organization & Architecture
### Log Package (`log/`)
Dual API remains, but with namespace support:
1. **Package-level functions**: Use "default" namespace
- `log.Info()`, `log.Debug()`, etc.
- All entry creations include `Namespace: DefaultNamespace`
2. **Logger instances**: Use custom namespace
- Create with `log.NewLogger(namespace)`
- All entry creations include `Namespace: l.Namespace`
### Client Architecture (Updated)
**Client filtering by namespace**:
1. **Empty Namespaces slice**: Receives all logs regardless of namespace
2. **Non-empty Namespaces**: Only receives logs matching one of the specified namespaces
**matchesNamespace helper**:
```go
func (c *Client) matchesNamespace(namespace string) bool {
// Empty Namespaces slice means match all
if len(c.Namespaces) == 0 {
return true
}
for _, ns := range c.Namespaces {
if ns == namespace {
return true
}
}
return false
}
```
**Entry flow with namespace filtering**:
1. Log function called with namespace
2. `Entry` created with namespace field
3. Namespace registered in global map
4. `createLog()` sends to all clients
5. Each client checks `matchesNamespace()`
6. Only matching clients receive the entry
### WebSocket Handler (`ws/`)
**Namespace parameter parsing**:
```go
namespacesParam := r.URL.Query().Get("namespaces")
var namespaces []string
if namespacesParam != "" {
namespaces = strings.Split(namespacesParam, ",")
}
lc := logger.CreateClient(namespaces...)
```
**Namespaces API handler** (`ws/namespaces.go`):
```go
func NamespacesHandler(w http.ResponseWriter, r *http.Request) {
namespaces := logger.GetNamespaces()
w.Header().Set("Content-Type", "application/json")
json.NewEncoder(w).Encode(map[string]interface{}{
"namespaces": namespaces,
})
}
```
### Browser Package (`browser/`)
Still embeds viewer.html, but HTML now includes:
- Namespace filter input
- Namespace column in grid (5 columns instead of 4)
- `reconnectWithNamespace()` method
- WebSocket URL construction with query parameter
## Go Version & Dependencies
- **Go version**: 1.24.4 (specified in go.mod)
- **Only external dependency**: `github.com/gorilla/websocket v1.5.3`
## Naming Conventions & Style
### Namespaces
- Use lowercase strings: `"api"`, `"database"`, `"auth"`, `"cache"`
- Default constant: `DefaultNamespace = "default"`
- Comma-separated in query params: `?namespaces=api,database`
### Log Levels
Unchanged from v1 - still use uppercase strings and iota constants.
### Variable Names
- Use descriptive names (`apiLogger`, `dbLogger`, `namespaces`)
- Exception: Loop variables, short-lived scopes
## Important Patterns & Gotchas
### 1. Namespace Tracking is Automatic
When any log is created, its namespace is automatically added to the global registry:
```go
func createLog(e Entry) {
// Track namespace
namespacesMux.Lock()
namespaces[e.Namespace] = true
namespacesMux.Unlock()
// ... rest of function
}
```
**No manual registration needed** - just log and the namespace appears.
### 2. Empty Namespace List = All Logs
Both for clients and WebSocket connections:
```go
client := log.CreateClient() // Gets ALL logs
ws://localhost:8080/ws // Gets ALL logs
```
This is the default behavior to maintain backward compatibility.
### 3. Client Namespace Filtering is Inclusive (OR)
If a client has multiple namespaces, it receives logs matching ANY of them:
```go
client := log.CreateClient("api", "database")
// Receives logs from "api" OR "database", not "auth"
```
### 4. Namespace Field Always Set
All logging functions set namespace:
- Package functions: `DefaultNamespace`
- Logger methods: `l.Namespace`
**Never nil or empty** - there's always a namespace.
### 5. WebSocket Namespace Reconnection
Changing namespace filter requires reconnecting WebSocket:
```javascript
reconnectWithNamespace() {
if (this.ws) {
this.ws.onclose = null; // Prevent auto-reconnect
this.ws.close();
this.ws = null;
}
this.reconnectAttempts = 0;
this.connectWebSocket(); // Creates new connection with new filter
}
```
UI provides "Reconnect" button for this purpose.
### 6. Stderr Client Uses All Namespaces
The built-in stderr client (created in `init()`) listens to all namespaces:
```go
stderrClient = CreateClient(DefaultNamespace)
```
But only prints logs matching its own namespace in `logStdErr()`:
```go
if e.level >= c.LogLevel && c.matchesNamespace(e.Namespace) {
fmt.Fprintf(os.Stderr, "%s\t%s\t[%s]\t%s\t%s\n", ...)
}
```
**Wait, that's a bug!** The stderr client is created with `DefaultNamespace` but should be created with no namespaces to see all logs. Let me check this.
Actually looking at the code:
```go
stderrClient = CreateClient(DefaultNamespace)
```
This means stderr client only sees "default" namespace logs. This might be intentional, but seems like a bug. Should probably be:
```go
stderrClient = CreateClient() // No args = all namespaces
```
### 7. Grid Layout Updated
The log viewer grid changed from 4 to 5 columns:
```css
/* v1 */
grid-template-columns: 180px 80px 1fr 120px;
/* v2 */
grid-template-columns: 180px 80px 100px 1fr 120px;
```
Order: Timestamp, Level, Namespace, Message, Source
## Testing
### Test Updates for v2
All `CreateClient()` calls in tests now pass namespace:
```go
// v1
c := CreateClient()
// v2
c := CreateClient("test")
c := CreateClient(DefaultNamespace)
```
Tests verify namespace appears in output (see stderr format).
### Running Tests
```bash
go test -v ./...
```
All existing tests pass with namespace support added.
## CI/CD
GitHub Actions workflow (`.github/workflows/ci.yaml`):
- Still uses Go 1.21 (should update to 1.24.4 to match go.mod)
- No changes needed for v2 functionality
## Common Tasks
### Adding a New Namespace
No code changes needed! Just create a logger:
```go
cacheLogger := log.NewLogger("cache")
cacheLogger.Info("Cache initialized")
```
Namespace automatically tracked and available via API.
### Creating Namespace-Specific Client
```go
// Subscribe only to API logs
apiClient := log.CreateClient("api")
defer apiClient.Destroy()
for {
entry := apiClient.Get()
// Only receives logs from "api" namespace
processAPILog(entry)
}
```
### Filtering WebSocket by Namespace
Frontend:
```javascript
// Set namespace filter
document.getElementById('namespaceFilter').value = 'api,database';
// Click reconnect button or call:
logViewer.reconnectWithNamespace();
```
Backend automatically creates filtered client based on query param.
### Getting All Active Namespaces
```go
namespaces := log.GetNamespaces()
// Returns: ["default", "api", "database", "auth", ...]
```
Or via HTTP:
```bash
GET /api/namespaces
```
Returns:
```json
{
"namespaces": ["default", "api", "database", "auth"]
}
```
## Migration from v1 to v2
### Import Paths
```go
// v1
import "github.com/taigrr/log-socket/log"
import "github.com/taigrr/log-socket/ws"
import "github.com/taigrr/log-socket/browser"
// v2
import "github.com/taigrr/log-socket/v2/log"
import "github.com/taigrr/log-socket/v2/ws"
import "github.com/taigrr/log-socket/v2/browser"
```
### CreateClient Calls
```go
// v1
client := log.CreateClient()
// v2 - same behavior
client := log.CreateClient() // Empty = all namespaces
// v2 - new filtering capability
client := log.CreateClient("api")
client := log.CreateClient("api", "database")
```
### Default() Logger
```go
// v1
logger := log.Default()
// v2 - uses default namespace
logger := log.Default()
// v2 - new namespaced option
logger := log.NewLogger("api")
```
### WebSocket URL
```
v1: ws://host/ws
v2: ws://host/ws # All namespaces (backward compatible)
v2: ws://host/ws?namespaces=api # Filtered
v2: ws://host/ws?namespaces=api,database # Multiple
```
## Repository Context
- **License**: Check LICENSE file
- **Funding**: GitHub sponsors (.github/FUNDING.yml)
- **Open Source**: github.com/taigrr/log-socket
- **Version**: v2.x.x (major version bump for breaking changes)
## Future Agent Notes
- **v2 is a breaking change**: Major version bump follows Go modules convention
- Namespace support is the primary new feature
- Backward compatible behavior: empty namespace list = all logs
- Namespace tracking is automatic via global registry
- Web UI has been significantly updated for namespace support
- Possible bug: stderr client might need to use `CreateClient()` instead of `CreateClient(DefaultNamespace)` to see all logs
- All tests updated and passing
- Example in main.go demonstrates multiple namespaces

View File

@@ -1,4 +1,4 @@
Copyright (C) 2019-2022 by Tai Groot <tai@taigrr.com>
Copyright (C) 2019-2025 by Tai Groot <tai@taigrr.com>
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted.

273
README.md
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@@ -1,15 +1,268 @@
log-socket
==========
`log-socket` is a drop-in replacement for Go's `log` package that allows for streaming of logs via WebSockets.
# Log Socket v2
A real-time log viewer with WebSocket support and namespace filtering, written in Go.
## What's New in v2
**Breaking Changes:**
- Module path changed to `github.com/taigrr/log-socket/v2`
- `CreateClient()` now accepts variadic `namespaces ...string` parameter
- `Logger` type now includes `Namespace` field
- New `NewLogger(namespace string)` constructor for namespaced loggers
**New Features:**
- **Namespace support**: Organize logs by namespace (api, database, auth, etc.)
- **Namespace filtering**: Subscribe to specific namespaces via WebSocket
- **Frontend namespace selector**: Filter logs by namespace in the web UI
- **Namespace API**: GET `/api/namespaces` to list all active namespaces
- **Colored terminal output**: Log levels are color-coded in terminal (no external packages)
## Features
- Real-time log streaming via WebSocket
- Web-based log viewer with filtering capabilities
- **Namespace-based log organization**
- Support for multiple log levels (TRACE, DEBUG, INFO, WARN, ERROR, PANIC, FATAL)
- Color-coded log levels for better visibility
- Auto-scrolling with toggle option
- Log download functionality
- Log clearing capability
- File source tracking for each log entry
## Installation
To install the library:
`go get github.com/taigrr/log-socket`
## Running
To run a demo of this library:
`go run main.go`
```bash
go install github.com/taigrr/log-socket/v2@latest
```
This demo will do a sample of every log type and push results to `0.0.0.0:8080`. Once running, you can open a browser and navigate to
`0.0.0.0:8080` to see an example implementation of how logs are streamed.
## Quick Start
```go
package main
import (
"net/http"
logger "github.com/taigrr/log-socket/v2/log"
"github.com/taigrr/log-socket/v2/ws"
"github.com/taigrr/log-socket/v2/browser"
)
func main() {
defer logger.Flush()
// Set up HTTP handlers
http.HandleFunc("/ws", ws.LogSocketHandler)
http.HandleFunc("/api/namespaces", ws.NamespacesHandler)
http.HandleFunc("/", browser.LogSocketViewHandler)
// Use default namespace
logger.Info("Application started")
// Create namespaced loggers
apiLogger := logger.NewLogger("api")
dbLogger := logger.NewLogger("database")
apiLogger.Info("API server ready")
dbLogger.Debug("Database connected")
logger.Fatal(http.ListenAndServe(":8080", nil))
}
```
## Usage
### Starting the Server
```bash
log-socket
```
By default, the server runs on `0.0.0.0:8080`. Specify a different address:
```bash
log-socket -addr localhost:8080
```
### Web Interface
Open your browser and navigate to `http://localhost:8080`
**Namespace Filtering:**
- The namespace dropdown is automatically populated from `/api/namespaces`
- Select one or more namespaces to filter (hold Ctrl/Cmd to multi-select)
- Default is "All Namespaces" (shows everything)
- Click "Reconnect" to apply the filter
## API
### Logging Interface
The package provides two ways to log:
#### 1. Package-level functions (default namespace)
```go
logger.Trace("trace message")
logger.Debug("debug message")
logger.Info("info message")
logger.Notice("notice message")
logger.Warn("warning message")
logger.Error("error message")
logger.Panic("panic message") // Logs and panics
logger.Fatal("fatal message") // Logs and exits
```
Each has formatted (`f`) and line (`ln`) variants:
```go
logger.Infof("User %s logged in", username)
logger.Infoln("This adds a newline")
```
#### 2. Namespaced loggers
```go
apiLogger := logger.NewLogger("api")
apiLogger.Info("Request received")
dbLogger := logger.NewLogger("database")
dbLogger.Warn("Slow query detected")
```
### Creating Clients with Namespace Filters
```go
// Listen to all namespaces
client := logger.CreateClient()
// Listen to specific namespace
client := logger.CreateClient("api")
// Listen to multiple namespaces
client := logger.CreateClient("api", "database", "auth")
```
### WebSocket API
#### Log Stream Endpoint
**URL:** `ws://localhost:8080/ws`
**Query Parameters:**
- `namespaces` (optional): Comma-separated list of namespaces to filter
**Examples:**
```
ws://localhost:8080/ws # All namespaces
ws://localhost:8080/ws?namespaces=api # Only "api" namespace
ws://localhost:8080/ws?namespaces=api,database # Multiple namespaces
```
**Message Format:**
```json
{
"timestamp": "2024-11-10T15:42:49.777298-05:00",
"output": "API request received",
"file": "main.go:42",
"level": "INFO",
"namespace": "api"
}
```
#### Namespaces List Endpoint
**URL:** `GET http://localhost:8080/api/namespaces`
**Response:**
```json
{
"namespaces": ["default", "api", "database", "auth"]
}
```
## Web Interface Features
- **Namespace Dropdown**: Dynamically populated from `/api/namespaces`, multi-select support
- **Text Search**: Filter logs by content, level, namespace, or source file
- **Auto-scroll**: Toggle auto-scrolling with checkbox
- **Download**: Save all logs as a JSON file
- **Clear**: Remove all logs from the viewer
- **Color Coding**: Different log levels are color-coded
- **Reconnect**: Reconnect WebSocket with new namespace filter
## Terminal Colors
Log output to stderr is automatically colorized when writing to a terminal. Colors are disabled when output is piped or redirected to a file.
### Color Scheme
| Level | Color |
|--------|--------------|
| TRACE | Gray |
| DEBUG | Cyan |
| INFO | Green |
| NOTICE | Blue |
| WARN | Yellow |
| ERROR | Red |
| PANIC | Bold Red |
| FATAL | Bold Red |
### Controlling Colors
```go
// Disable colors (e.g., for CI/CD or file output)
logger.SetColorEnabled(false)
// Enable colors explicitly
logger.SetColorEnabled(true)
// Check current state
if logger.ColorEnabled() {
// colors are on
}
```
Colors are implemented using standard ANSI escape codes with no external dependencies.
## Migration from v1
### Import Path
```go
// v1
import "github.com/taigrr/log-socket/log"
// v2
import "github.com/taigrr/log-socket/v2/log"
```
### CreateClient Changes
```go
// v1
client := log.CreateClient()
// v2 - specify namespace(s) or leave empty for all
client := log.CreateClient() // All namespaces
client := log.CreateClient("api") // Single namespace
client := log.CreateClient("api", "db") // Multiple namespaces
```
### New Logger Constructor
```go
// v2 only - create namespaced logger
apiLogger := log.NewLogger("api")
apiLogger.Info("Message in api namespace")
```
## Dependencies
- [gorilla/websocket](https://github.com/gorilla/websocket) for WebSocket support
## Notes
The web interface is provided as an example implementation. Users are encouraged to customize it for their specific needs. The WebSocket endpoint (`/ws`) can be consumed by any WebSocket client.
## License
See LICENSE file for details.

View File

@@ -7,6 +7,9 @@ import (
"strings"
)
//go:embed viewer.html
var webpage string
func LogSocketViewHandler(w http.ResponseWriter, r *http.Request) {
wsResource := r.Host + r.URL.Path
if r.TLS != nil {
@@ -18,7 +21,4 @@ func LogSocketViewHandler(w http.ResponseWriter, r *http.Request) {
homeTemplate.Execute(w, wsResource)
}
//go:embed viewer.html
var webpage string
var homeTemplate = template.Must(template.New("").Parse(webpage))

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@@ -1,196 +1,706 @@
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<center>
<input type="text" id="search" onkeyup="filterTable()" placeholder="Filter...">
<input type="checkbox" id="shouldScroll" checked>Enable Autoscroll<br>
<table id="logHeaders" style="text-align:left; width:80%;" >
<tbody>
<tr class="header">
<th style="width:20%;">TimeStamp</th>
<th style="width:5%;">Level</th>
<th style="width:65%;">Output</th>
<th style="width:10%;">Source</th>
</tr>
</tbody>
</table>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Log Viewer</title>
<style>
:root {
--primary-color: #2196F3;
--error-color: #f44336;
--warning-color: #ff9800;
--success-color: #4caf50;
--info-color: #2196F3;
--debug-color: #9c27b0;
--trace-color: #607d8b;
--bg-primary: #ffffff;
--bg-secondary: #f5f5f5;
--text-primary: #333333;
--text-secondary: #666666;
--border-color: #e0e0e0;
--shadow: 0 2px 4px rgba(0,0,0,0.1);
--shadow-hover: 0 4px 8px rgba(0,0,0,0.15);
}
<div id="tableWrapper">
<table id="logs" style="text-align:left; width:100%;" >
<tbody id="tbodylogs">
<tr class="header">
<th style="width:20%;"></th>
<th style="width:5%;"></th>
<th style="width:65%;"></th>
<th style="width:10%;"></th>
</tr>
* {
box-sizing: border-box;
}
</tbody>
</table>
body {
margin: 0;
padding: 0;
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
background-color: var(--bg-secondary);
color: var(--text-primary);
line-height: 1.6;
}
.container {
max-width: 1400px;
margin: 0 auto;
padding: 20px;
}
.header {
background: var(--bg-primary);
padding: 20px;
border-radius: 8px;
box-shadow: var(--shadow);
margin-bottom: 20px;
}
.header h1 {
margin: 0 0 20px 0;
color: var(--text-primary);
font-size: 24px;
font-weight: 600;
}
.controls {
display: flex;
gap: 15px;
align-items: center;
flex-wrap: wrap;
}
.search-container {
position: relative;
flex: 1;
min-width: 250px;
}
.search-input {
width: 100%;
padding: 10px 15px;
border: 2px solid var(--border-color);
border-radius: 6px;
font-size: 14px;
transition: border-color 0.2s ease;
}
.search-input:focus {
outline: none;
border-color: var(--primary-color);
}
.checkbox-container {
display: flex;
align-items: center;
gap: 8px;
user-select: none;
}
.checkbox-container input[type="checkbox"] {
width: 16px;
height: 16px;
}
.checkbox-container label {
font-size: 14px;
color: var(--text-secondary);
cursor: pointer;
}
.log-container {
background: var(--bg-primary);
border-radius: 8px;
box-shadow: var(--shadow);
overflow: hidden;
margin-bottom: 20px;
}
.log-header {
background: var(--bg-secondary);
padding: 12px 0;
border-bottom: 1px solid var(--border-color);
font-weight: 600;
font-size: 12px;
text-transform: uppercase;
letter-spacing: 0.5px;
}
.log-table {
width: 100%;
border-collapse: collapse;
}
.log-row {
display: grid;
grid-template-columns: 180px 80px 100px 1fr 120px;
gap: 15px;
padding: 10px 15px;
border-bottom: 1px solid var(--border-color);
transition: background-color 0.2s ease;
}
.log-row:hover {
background-color: rgba(0,0,0,0.02);
}
.log-cell {
display: flex;
align-items: center;
font-size: 13px;
word-break: break-word;
}
.log-cell.timestamp {
font-family: 'Monaco', 'Menlo', monospace;
color: var(--text-secondary);
font-size: 12px;
}
.log-cell.level {
font-weight: 600;
text-align: center;
justify-content: center;
}
.log-cell.output {
font-family: 'Monaco', 'Menlo', monospace;
white-space: pre-wrap;
}
.log-cell.source {
font-size: 11px;
color: var(--text-secondary);
}
.log-level-error { background-color: #ffebee; color: var(--error-color); }
.log-level-warn { background-color: #fff3e0; color: var(--warning-color); }
.log-level-info { background-color: #e3f2fd; color: var(--info-color); }
.log-level-debug { background-color: #f3e5f5; color: var(--debug-color); }
.log-level-trace { background-color: #eceff1; color: var(--trace-color); }
.log-viewer {
height: 60vh;
overflow-y: auto;
overflow-x: hidden;
}
.log-viewer::-webkit-scrollbar {
width: 8px;
}
.log-viewer::-webkit-scrollbar-track {
background: var(--bg-secondary);
}
.log-viewer::-webkit-scrollbar-thumb {
background: #ccc;
border-radius: 4px;
}
.log-viewer::-webkit-scrollbar-thumb:hover {
background: #999;
}
.actions {
display: flex;
gap: 10px;
justify-content: center;
flex-wrap: wrap;
}
.btn {
padding: 10px 20px;
border: none;
border-radius: 6px;
font-size: 14px;
font-weight: 500;
cursor: pointer;
transition: all 0.2s ease;
text-decoration: none;
display: inline-flex;
align-items: center;
gap: 8px;
}
.btn:hover {
transform: translateY(-1px);
box-shadow: var(--shadow-hover);
}
.btn:active {
transform: translateY(0);
}
.btn-primary {
background-color: var(--primary-color);
color: white;
}
.btn-danger {
background-color: var(--error-color);
color: white;
}
.status-bar {
background: var(--bg-primary);
padding: 10px 20px;
border-radius: 6px;
box-shadow: var(--shadow);
display: flex;
justify-content: space-between;
align-items: center;
font-size: 12px;
color: var(--text-secondary);
}
.connection-status {
display: flex;
align-items: center;
gap: 8px;
}
.status-indicator {
width: 8px;
height: 8px;
border-radius: 50%;
background-color: var(--error-color);
}
.status-indicator.connected {
background-color: var(--success-color);
}
.empty-state {
text-align: center;
padding: 40px 20px;
color: var(--text-secondary);
}
.empty-state h3 {
margin: 0 0 10px 0;
font-size: 18px;
}
.empty-state p {
margin: 0;
font-size: 14px;
}
@media (max-width: 768px) {
.container {
padding: 10px;
}
.controls {
flex-direction: column;
align-items: stretch;
}
.log-row {
grid-template-columns: 1fr;
gap: 5px;
}
.log-cell.timestamp::before {
content: 'Time: ';
font-weight: 600;
}
.log-cell.level::before {
content: 'Level: ';
font-weight: 600;
}
.log-cell.source::before {
content: 'Source: ';
font-weight: 600;
}
.log-header {
display: none;
}
}
</style>
</head>
<body>
<div class="container">
<header class="header">
<h1>📊 Log Viewer</h1>
<div class="controls">
<div class="search-container">
<select
id="namespaceFilter"
class="search-input"
multiple
size="1"
aria-label="Filter by namespace"
>
<option value="">All Namespaces (loading...)</option>
</select>
</div>
<div class="search-container">
<input
type="text"
id="search"
class="search-input"
placeholder="🔍 Filter logs..."
aria-label="Filter logs"
>
</div>
<div class="checkbox-container">
<input type="checkbox" id="shouldScroll" checked>
<label for="shouldScroll">Auto-scroll</label>
</div>
<button id="reconnectBtn" class="btn btn-primary">
🔄 Reconnect
</button>
</div>
<br>
<input class="button" type="button" id="download" value="Download Logs" style="background-color:#3f51b5;"/>
<input class="button" type="button" id="delete" value="Delete Logs" style="background-color:#f44336"/>
</center>
</body>
<footer>
<style>
#tableWrapper{
overflow-y: scroll;
display: flow-root;
width: 80%;
height: 80vh;
}
td,tr{
height: min-content;
}
.button{
display: inline-block;
width: 5vw;
height: 5vh;
}
</style>
<script>
var logTable = document.getElementById("logs");
var logTableB = document.getElementById("tbodylogs");
var ws = null;
var application = "demo-commit"
var logs = [];
function sleep(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
}
function download(filename, text) {
var element = document.createElement('a');
element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));
element.setAttribute('download', filename);
element.style.display = 'none';
document.body.appendChild(element);
element.click();
document.body.removeChild(element);
}
function openSocket() {
if (ws) {
return false;
}
ws = new WebSocket("{{.}}");
ws.onclose = async function(evt) {
ws = null;
while(ws == null){
openSocket()
await sleep(5000);
}
}
ws.onmessage = function(evt) {
var entry = JSON.parse(evt.data)
logs.push(entry)
var row = document.createElement('tr');
var ts = document.createElement('td');
var tst = document.createTextNode(entry.timestamp);
ts.appendChild(tst);
row.appendChild(ts);
var ts = document.createElement('td');
var tst = document.createTextNode(entry.level);
ts.appendChild(tst);
row.appendChild(ts);
var ts = document.createElement('td');
var tst = document.createTextNode(entry.output);
ts.appendChild(tst);
row.appendChild(ts);
var ts = document.createElement('td');
var tst = document.createTextNode(entry.file);
ts.appendChild(tst);
row.appendChild(ts);
var bg="";
switch(entry.level){
case "INFO":
bg="white";
break;
case "ERROR":
bg="#f44336";
break;
case "WARN":
bg="#fb8c00"
break;
case "TRACE":
bg="#E1F5FE"
break;
case "DEBUG":
bg="#B3E5FC"
break;
default:
bg="white"
break;
}
row.style.backgroundColor=bg
logTableB.append(row)
filterTable()
}
ws.onerror = function(evt) {
if (evt != null && evt.data != null){
// handle error here
}
}
}
function clearTable(){
if(!window.confirm("Are you sure you want to delete all logs?")){
return
}
logs = []
</header>
while (logTableB.childNodes.length > 1) {
logTableB.removeChild(logTableB.childNodes[1]);
<div class="log-container">
<div class="log-header">
<div class="log-row">
<div class="log-cell">Timestamp</div>
<div class="log-cell">Level</div>
<div class="log-cell">Namespace</div>
<div class="log-cell">Message</div>
<div class="log-cell">Source</div>
</div>
</div>
<div id="logViewer" class="log-viewer">
<div id="emptyState" class="empty-state">
<h3>No logs yet</h3>
<p>Waiting for log entries...</p>
</div>
</div>
</div>
<div class="actions">
<button id="downloadBtn" class="btn btn-primary">
📥 Download Logs
</button>
<button id="clearBtn" class="btn btn-danger">
🗑️ Clear Logs
</button>
</div>
<div class="status-bar">
<div class="connection-status">
<span class="status-indicator" id="statusIndicator"></span>
<span id="connectionStatus">Connecting...</span>
</div>
<div id="logCount">0 logs</div>
</div>
</div>
<script>
class LogViewer {
constructor() {
this.ws = null;
this.logs = [];
this.filteredLogs = [];
this.isConnected = false;
this.reconnectAttempts = 0;
this.maxReconnectAttempts = 5;
this.initializeElements();
this.attachEventListeners();
this.fetchNamespaces();
this.connectWebSocket();
this.startAutoScroll();
}
initializeElements() {
this.logViewer = document.getElementById('logViewer');
this.emptyState = document.getElementById('emptyState');
this.namespaceFilter = document.getElementById('namespaceFilter');
this.searchInput = document.getElementById('search');
this.scrollCheckbox = document.getElementById('shouldScroll');
this.downloadBtn = document.getElementById('downloadBtn');
this.clearBtn = document.getElementById('clearBtn');
this.reconnectBtn = document.getElementById('reconnectBtn');
this.statusIndicator = document.getElementById('statusIndicator');
this.connectionStatus = document.getElementById('connectionStatus');
this.logCount = document.getElementById('logCount');
}
attachEventListeners() {
this.searchInput.addEventListener('input', this.debounce(() => this.filterLogs(), 300));
this.namespaceFilter.addEventListener('change', () => this.reconnectWithNamespace());
this.downloadBtn.addEventListener('click', () => this.downloadLogs());
this.clearBtn.addEventListener('click', () => this.clearLogs());
this.reconnectBtn.addEventListener('click', () => this.reconnectWithNamespace());
}
async fetchNamespaces() {
try {
const response = await fetch('/api/namespaces');
const data = await response.json();
this.updateNamespaceFilter(data.namespaces || []);
} catch (error) {
console.error('Failed to fetch namespaces:', error);
}
}
function filterTable() {
var cols, input, filter, table, tr, td, i, txtValue, w;
input = document.getElementById("search");
filter = input.value;
table = logTableB;
tr = table.getElementsByTagName("tr");
for (i = 1; i < tr.length; i++) {
cols = tr[i].getElementsByTagName("td");
var visible = false;
for (w = 0; w < cols.length; w++){
if (!visible && cols[w]) {
td = cols[w]
txtValue = td.textContent || td.innerText;
if (txtValue.indexOf(filter) > -1) {
visible = true
}
updateNamespaceFilter(namespaces) {
// Clear existing options
this.namespaceFilter.innerHTML = '';
// Add "All" option
const allOption = document.createElement('option');
allOption.value = '';
allOption.textContent = 'All Namespaces';
allOption.selected = true;
this.namespaceFilter.appendChild(allOption);
// Add namespace options
namespaces.sort().forEach(ns => {
const option = document.createElement('option');
option.value = ns;
option.textContent = ns;
this.namespaceFilter.appendChild(option);
});
}
connectWebSocket() {
if (this.ws) return;
try {
let wsUrl = "{{.}}";
// Get selected namespace options from multi-select
const selectedOptions = Array.from(this.namespaceFilter.selectedOptions)
.map(opt => opt.value)
.filter(val => val !== ''); // Remove empty "All" option
// Add namespace filter if specific namespaces selected
if (selectedOptions.length > 0) {
const namespaces = selectedOptions.join(',');
const separator = wsUrl.includes('?') ? '&' : '?';
wsUrl += `${separator}namespaces=${encodeURIComponent(namespaces)}`;
}
this.ws = new WebSocket(wsUrl);
this.updateConnectionStatus('Connecting...', false);
this.ws.onopen = () => {
this.isConnected = true;
this.reconnectAttempts = 0;
this.updateConnectionStatus('Connected', true);
};
this.ws.onmessage = (event) => {
try {
const logEntry = JSON.parse(event.data);
this.addLogEntry(logEntry);
} catch (error) {
console.error('Failed to parse log entry:', error);
}
}
if(visible){
};
tr[i].style.display = "";
} else {
this.ws.onclose = () => {
this.isConnected = false;
this.ws = null;
this.updateConnectionStatus('Disconnected', false);
this.scheduleReconnect();
};
tr[i].style.display = "none";
}
this.ws.onerror = (error) => {
console.error('WebSocket error:', error);
this.updateConnectionStatus('Connection Error', false);
};
} catch (error) {
console.error('Failed to create WebSocket:', error);
this.updateConnectionStatus('Connection Failed', false);
this.scheduleReconnect();
}
}
function pageScroll() {
if (document.getElementById('shouldScroll').checked) {
document.getElementById('tableWrapper').scrollBy(0,10);
reconnectWithNamespace() {
if (this.ws) {
this.ws.onclose = null; // Prevent auto-reconnect
this.ws.close();
this.ws = null;
}
setTimeout(pageScroll,10);
this.reconnectAttempts = 0;
this.connectWebSocket();
}
document.getElementById("delete").addEventListener("click", function(){
scheduleReconnect() {
if (this.reconnectAttempts < this.maxReconnectAttempts) {
this.reconnectAttempts++;
const delay = Math.min(1000 * Math.pow(2, this.reconnectAttempts), 30000);
clearTable()
}, false);
document.getElementById("download").addEventListener("click", function(){
this.updateConnectionStatus(`Reconnecting in ${Math.ceil(delay/1000)}s...`, false);
download(application+'.json',JSON.stringify(logs));
}, false);
openSocket();
pageScroll();
</script>
setTimeout(() => {
this.connectWebSocket();
}, delay);
} else {
this.updateConnectionStatus('Connection Failed', false);
}
}
</footer>
addLogEntry(entry) {
this.logs.push(entry);
this.updateLogCount();
if (this.matchesFilter(entry)) {
this.renderLogEntry(entry);
this.hideEmptyState();
}
}
renderLogEntry(entry) {
const logRow = document.createElement('div');
logRow.className = `log-row log-level-${entry.level.toLowerCase()}`;
logRow.innerHTML = `
<div class="log-cell timestamp">${this.formatTimestamp(entry.timestamp)}</div>
<div class="log-cell level">${entry.level}</div>
<div class="log-cell namespace">${this.escapeHtml(entry.namespace || 'default')}</div>
<div class="log-cell output">${this.escapeHtml(entry.output)}</div>
<div class="log-cell source">${this.escapeHtml(entry.file || 'N/A')}</div>
`;
this.logViewer.appendChild(logRow);
}
formatTimestamp(timestamp) {
try {
const date = new Date(timestamp);
return date.toLocaleString();
} catch {
return timestamp;
}
}
escapeHtml(text) {
const div = document.createElement('div');
div.textContent = text;
return div.innerHTML;
}
filterLogs() {
const query = this.searchInput.value.toLowerCase().trim();
// Clear current display
this.clearLogDisplay();
if (!query) {
// Show all logs
this.logs.forEach(log => this.renderLogEntry(log));
} else {
// Show filtered logs
const filtered = this.logs.filter(log =>
this.matchesQuery(log, query)
);
filtered.forEach(log => this.renderLogEntry(log));
}
if (this.logViewer.children.length === 0 ||
(this.logViewer.children.length === 1 && this.logViewer.contains(this.emptyState))) {
this.showEmptyState();
} else {
this.hideEmptyState();
}
}
matchesFilter(entry) {
const query = this.searchInput.value.toLowerCase().trim();
return !query || this.matchesQuery(entry, query);
}
matchesQuery(entry, query) {
return (
entry.output.toLowerCase().includes(query) ||
entry.level.toLowerCase().includes(query) ||
(entry.namespace && entry.namespace.toLowerCase().includes(query)) ||
(entry.file && entry.file.toLowerCase().includes(query)) ||
entry.timestamp.toLowerCase().includes(query)
);
}
clearLogDisplay() {
while (this.logViewer.firstChild && this.logViewer.firstChild !== this.emptyState) {
this.logViewer.removeChild(this.logViewer.firstChild);
}
}
showEmptyState() {
if (!this.logViewer.contains(this.emptyState)) {
this.logViewer.appendChild(this.emptyState);
}
}
hideEmptyState() {
if (this.logViewer.contains(this.emptyState)) {
this.logViewer.removeChild(this.emptyState);
}
}
clearLogs() {
if (!confirm('Are you sure you want to clear all logs?')) return;
this.logs = [];
this.clearLogDisplay();
this.showEmptyState();
this.updateLogCount();
}
downloadLogs() {
if (this.logs.length === 0) {
alert('No logs to download');
return;
}
const dataStr = JSON.stringify(this.logs, null, 2);
const dataBlob = new Blob([dataStr], { type: 'application/json' });
const link = document.createElement('a');
link.href = URL.createObjectURL(dataBlob);
link.download = `logs-${new Date().toISOString().split('T')[0]}.json`;
document.body.appendChild(link);
link.click();
document.body.removeChild(link);
URL.revokeObjectURL(link.href);
}
updateConnectionStatus(status, connected) {
this.connectionStatus.textContent = status;
this.statusIndicator.classList.toggle('connected', connected);
}
updateLogCount() {
const count = this.logs.length;
this.logCount.textContent = `${count} log${count !== 1 ? 's' : ''}`;
}
startAutoScroll() {
const autoScroll = () => {
if (this.scrollCheckbox.checked && this.isConnected) {
this.logViewer.scrollTop = this.logViewer.scrollHeight;
}
requestAnimationFrame(autoScroll);
};
autoScroll();
}
debounce(func, wait) {
let timeout;
return function executedFunction(...args) {
const later = () => {
clearTimeout(timeout);
func(...args);
};
clearTimeout(timeout);
timeout = setTimeout(later, wait);
};
}
}
// Initialize the log viewer when the page loads
document.addEventListener('DOMContentLoaded', () => {
new LogViewer();
});
</script>
</body>
</html>

36
examples/basic/main.go Normal file
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@@ -0,0 +1,36 @@
// Example: basic usage of log-socket as a drop-in logger.
//
// This demonstrates using the package-level logging functions,
// which work similarly to the standard library's log package.
package main
import (
"fmt"
"net/http"
"github.com/taigrr/log-socket/v2/browser"
logger "github.com/taigrr/log-socket/v2/log"
"github.com/taigrr/log-socket/v2/ws"
)
func main() {
defer logger.Flush()
// Set the minimum log level (default is LTrace, showing everything)
logger.SetLogLevel(logger.LDebug)
// Package-level functions log to the "default" namespace
logger.Info("Application starting up")
logger.Debug("Debug mode enabled")
logger.Warnf("Config file not found at %s, using defaults", "/etc/app/config.yaml")
logger.Errorf("Failed to connect to database: %s", "connection refused")
// Print/Printf/Println are aliases for Info
logger.Println("This is equivalent to Infoln")
// Start the web UI so you can view logs at http://localhost:8080
http.HandleFunc("/ws", ws.LogSocketHandler)
http.HandleFunc("/", browser.LogSocketViewHandler)
fmt.Println("Log viewer available at http://localhost:8080")
logger.Fatal(http.ListenAndServe("0.0.0.0:8080", nil))
}

63
examples/client/main.go Normal file
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// Example: programmatic log client with namespace filtering.
//
// This shows how to create a Client that receives log entries
// programmatically, optionally filtered to specific namespaces.
// Useful for building custom log processors, alerting, or forwarding.
package main
import (
"fmt"
"time"
logger "github.com/taigrr/log-socket/v2/log"
)
func main() {
defer logger.Flush()
// Create a client that receives ALL log entries
allLogs := logger.CreateClient()
allLogs.SetLogLevel(logger.LInfo)
// Create a client that only receives "database" and "auth" logs
securityLogs := logger.CreateClient("database", "auth")
securityLogs.SetLogLevel(logger.LWarn) // Only warnings and above
dbLog := logger.NewLogger("database")
authLog := logger.NewLogger("auth")
apiLog := logger.NewLogger("api")
// Process all logs
go func() {
for {
entry := allLogs.Get()
fmt.Printf("[ALL] %s [%s] %s: %s\n",
entry.Timestamp.Format(time.TimeOnly),
entry.Namespace, entry.Level, entry.Output)
}
}()
// Process only security-relevant warnings/errors
go func() {
for {
entry := securityLogs.Get()
if entry.Level == "ERROR" || entry.Level == "WARN" {
fmt.Printf("🚨 SECURITY ALERT [%s] %s: %s\n",
entry.Namespace, entry.Level, entry.Output)
}
}
}()
// Generate some logs
for i := 0; i < 5; i++ {
apiLog.Info("API request processed")
dbLog.Info("Query executed successfully")
dbLog.Warn("Connection pool running low")
authLog.Error("Brute force attempt detected")
time.Sleep(1 * time.Second)
}
// Clean up clients when done
allLogs.Destroy()
securityLogs.Destroy()
}

View File

@@ -0,0 +1,48 @@
// Example: log level filtering and all available levels.
//
// log-socket supports 8 log levels from TRACE (most verbose)
// to FATAL (least verbose). Setting a log level filters out
// everything below it.
package main
import (
"fmt"
logger "github.com/taigrr/log-socket/v2/log"
)
func main() {
defer logger.Flush()
fmt.Println("=== All log levels (TRACE and above) ===")
logger.SetLogLevel(logger.LTrace)
logger.Trace("Detailed execution trace — variable x = 42")
logger.Debug("Processing request for user_id=123")
logger.Info("Server started on :8080")
logger.Notice("Configuration reloaded")
logger.Warn("Disk usage at 85%")
logger.Error("Failed to send email: SMTP timeout")
// logger.Panic("...") — would panic
// logger.Fatal("...") — would os.Exit(1)
fmt.Println("\n=== Formatted variants ===")
logger.Infof("Request took %dms", 42)
logger.Warnf("Retrying in %d seconds (attempt %d/%d)", 5, 2, 3)
logger.Errorf("HTTP %d: %s", 503, "Service Unavailable")
fmt.Println("\n=== Only WARN and above ===")
logger.SetLogLevel(logger.LWarn)
logger.Debug("This will NOT appear")
logger.Info("This will NOT appear either")
logger.Warn("This WILL appear")
logger.Error("This WILL appear too")
fmt.Println("\n=== Per-logger levels via namespaced loggers ===")
logger.SetLogLevel(logger.LTrace) // Reset global
appLog := logger.NewLogger("app")
appLog.Info("Namespaced loggers inherit the global output but tag entries")
appLog.Warnf("Something needs attention in the %s subsystem", "app")
}

View File

@@ -0,0 +1,73 @@
// Example: namespace-based logging for organizing logs by component.
//
// Namespaces let you tag log entries by subsystem (api, database, auth, etc.)
// and filter them in the web UI or via programmatic clients.
package main
import (
"fmt"
"math/rand"
"net/http"
"time"
"github.com/taigrr/log-socket/v2/browser"
logger "github.com/taigrr/log-socket/v2/log"
"github.com/taigrr/log-socket/v2/ws"
)
func main() {
defer logger.Flush()
// Create loggers for different subsystems
apiLog := logger.NewLogger("api")
dbLog := logger.NewLogger("database")
authLog := logger.NewLogger("auth")
cacheLog := logger.NewLogger("cache")
// Simulate application activity
go func() {
for {
apiLog.Infof("GET /api/users — 200 OK (%dms)", rand.Intn(200))
apiLog.Debugf("Request headers: Accept=application/json")
time.Sleep(1 * time.Second)
}
}()
go func() {
for {
dbLog.Infof("SELECT * FROM users — %d rows", rand.Intn(100))
if rand.Float64() < 0.3 {
dbLog.Warn("Slow query detected (>500ms)")
}
time.Sleep(2 * time.Second)
}
}()
go func() {
for {
if rand.Float64() < 0.7 {
authLog.Info("User login successful")
} else {
authLog.Error("Failed login attempt from 192.168.1.42")
}
time.Sleep(3 * time.Second)
}
}()
go func() {
for {
cacheLog.Tracef("Cache hit ratio: %.1f%%", rand.Float64()*100)
if rand.Float64() < 0.1 {
cacheLog.Warn("Cache eviction triggered")
}
time.Sleep(5 * time.Second)
}
}()
// The /api/namespaces endpoint lists all active namespaces
http.HandleFunc("/ws", ws.LogSocketHandler)
http.HandleFunc("/api/namespaces", ws.NamespacesHandler)
http.HandleFunc("/", browser.LogSocketViewHandler)
fmt.Println("Log viewer with namespace filtering at http://localhost:8080")
logger.Fatal(http.ListenAndServe("0.0.0.0:8080", nil))
}

6
go.mod
View File

@@ -1,5 +1,5 @@
module github.com/taigrr/log-socket
module github.com/taigrr/log-socket/v2
go 1.16
go 1.26.0
require github.com/gorilla/websocket v1.5.0
require github.com/gorilla/websocket v1.5.3

4
go.sum
View File

@@ -1,2 +1,2 @@
github.com/gorilla/websocket v1.5.0 h1:PPwGk2jz7EePpoHN/+ClbZu8SPxiqlu12wZP/3sWmnc=
github.com/gorilla/websocket v1.5.0/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=

171
log/bench_test.go Normal file
View File

@@ -0,0 +1,171 @@
package log
import (
"fmt"
"testing"
)
const benchNS = "bench-isolated-ns"
// benchClient creates a client with a continuous drain goroutine.
// Returns the client and a stop function to call after b.StopTimer().
func benchClient(ns string) (*Client, func()) {
c := CreateClient(ns)
c.SetLogLevel(LTrace)
done := make(chan struct{})
go func() {
for {
select {
case <-done:
return
case <-c.writer:
}
}
}()
return c, func() {
close(done)
c.Destroy()
}
}
// BenchmarkCreateClient measures client creation overhead.
func BenchmarkCreateClient(b *testing.B) {
for i := 0; i < b.N; i++ {
c := CreateClient("bench")
c.Destroy()
}
}
// BenchmarkTrace benchmarks Logger.Trace.
func BenchmarkTrace(b *testing.B) {
l := NewLogger(benchNS)
_, stop := benchClient(benchNS)
defer stop()
b.ResetTimer()
for i := 0; i < b.N; i++ {
l.Trace("benchmark trace message")
}
}
// BenchmarkTracef benchmarks formatted Logger.Tracef.
func BenchmarkTracef(b *testing.B) {
l := NewLogger(benchNS)
_, stop := benchClient(benchNS)
defer stop()
b.ResetTimer()
for i := 0; i < b.N; i++ {
l.Tracef("benchmark trace message %d", i)
}
}
// BenchmarkDebug benchmarks Logger.Debug.
func BenchmarkDebug(b *testing.B) {
l := NewLogger(benchNS)
_, stop := benchClient(benchNS)
defer stop()
b.ResetTimer()
for i := 0; i < b.N; i++ {
l.Debug("benchmark debug message")
}
}
// BenchmarkInfo benchmarks Logger.Info.
func BenchmarkInfo(b *testing.B) {
l := NewLogger(benchNS)
_, stop := benchClient(benchNS)
defer stop()
b.ResetTimer()
for i := 0; i < b.N; i++ {
l.Info("benchmark info message")
}
}
// BenchmarkInfof benchmarks Logger.Infof with formatting.
func BenchmarkInfof(b *testing.B) {
l := NewLogger(benchNS)
_, stop := benchClient(benchNS)
defer stop()
b.ResetTimer()
for i := 0; i < b.N; i++ {
l.Infof("user %s performed action %d", "testuser", i)
}
}
// BenchmarkWarn benchmarks Logger.Warn.
func BenchmarkWarn(b *testing.B) {
l := NewLogger(benchNS)
_, stop := benchClient(benchNS)
defer stop()
b.ResetTimer()
for i := 0; i < b.N; i++ {
l.Warn("benchmark warn message")
}
}
// BenchmarkError benchmarks Logger.Error.
func BenchmarkError(b *testing.B) {
l := NewLogger(benchNS)
_, stop := benchClient(benchNS)
defer stop()
b.ResetTimer()
for i := 0; i < b.N; i++ {
l.Error("benchmark error message")
}
}
// BenchmarkMultipleClients measures fan-out to multiple consumers.
func BenchmarkMultipleClients(b *testing.B) {
const numClients = 5
l := NewLogger(benchNS)
stops := make([]func(), numClients)
for i := range stops {
_, stops[i] = benchClient(benchNS)
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
l.Info("benchmark multi-client")
}
b.StopTimer()
for _, stop := range stops {
stop()
}
}
// BenchmarkParallelInfo benchmarks concurrent Info calls from multiple goroutines.
func BenchmarkParallelInfo(b *testing.B) {
l := NewLogger(benchNS)
_, stop := benchClient(benchNS)
defer stop()
b.ResetTimer()
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
l.Info("parallel benchmark info")
}
})
}
// BenchmarkNamespaceFiltering benchmarks logging when the consumer
// filters by a different namespace (messages are not delivered).
func BenchmarkNamespaceFiltering(b *testing.B) {
l := NewLogger(benchNS)
_, stop := benchClient("completely-different-ns")
defer stop()
b.ResetTimer()
for i := 0; i < b.N; i++ {
l.Info("filtered out message")
}
}
// BenchmarkFileInfo measures the cost of runtime.Caller for file info.
func BenchmarkFileInfo(b *testing.B) {
for i := 0; i < b.N; i++ {
fileInfo(1)
}
}
// BenchmarkEntryCreation measures raw fmt.Sprint overhead (baseline).
func BenchmarkEntryCreation(b *testing.B) {
for i := 0; i < b.N; i++ {
_ = fmt.Sprint("benchmark message ", i)
}
}

99
log/color.go Normal file
View File

@@ -0,0 +1,99 @@
package log
import (
"os"
"sync"
)
// ANSI color codes for terminal output
const (
colorReset = "\033[0m"
colorRed = "\033[31m"
colorGreen = "\033[32m"
colorYellow = "\033[33m"
colorBlue = "\033[34m"
colorPurple = "\033[35m"
colorCyan = "\033[36m"
colorWhite = "\033[37m"
colorGray = "\033[90m"
// Bold variants
colorBoldRed = "\033[1;31m"
colorBoldYellow = "\033[1;33m"
colorBoldWhite = "\033[1;37m"
)
var (
colorEnabled = true
colorEnabledOnce sync.Once
colorMux sync.RWMutex
)
// SetColorEnabled enables or disables colored output for stderr logging.
// By default, color is enabled when stderr is a terminal.
func SetColorEnabled(enabled bool) {
colorMux.Lock()
colorEnabled = enabled
colorMux.Unlock()
}
// ColorEnabled returns whether colored output is currently enabled.
func ColorEnabled() bool {
colorMux.RLock()
defer colorMux.RUnlock()
return colorEnabled
}
// isTerminal checks if the given file descriptor is a terminal.
// This is a simple heuristic that works on Unix-like systems.
func isTerminal(f *os.File) bool {
stat, err := f.Stat()
if err != nil {
return false
}
return (stat.Mode() & os.ModeCharDevice) != 0
}
// initColorEnabled sets the default color state based on whether stderr is a terminal.
func initColorEnabled() {
colorEnabledOnce.Do(func() {
colorEnabled = isTerminal(os.Stderr)
})
}
// levelColor returns the ANSI color code for a given log level.
func levelColor(level Level) string {
switch level {
case LTrace:
return colorGray
case LDebug:
return colorCyan
case LInfo:
return colorGreen
case LNotice:
return colorBlue
case LWarn:
return colorYellow
case LError:
return colorRed
case LPanic:
return colorBoldRed
case LFatal:
return colorBoldRed
default:
return colorReset
}
}
// colorize wraps text with ANSI color codes if color is enabled.
func colorize(text string, color string) string {
if !ColorEnabled() {
return text
}
return color + text + colorReset
}
// colorizeLevelText returns the level string with appropriate color.
func colorizeLevelText(level string, lvl Level) string {
return colorize(level, levelColor(lvl))
}

View File

@@ -16,9 +16,13 @@ var (
stderrClient *Client
cleanup sync.Once
stderrFinished chan bool
namespaces map[string]bool
namespacesMux sync.RWMutex
)
func init() {
namespaces = make(map[string]bool)
initColorEnabled()
stderrClient = CreateClient()
stderrClient.SetLogLevel(LTrace)
stderrFinished = make(chan bool, 1)
@@ -27,16 +31,33 @@ func init() {
func (c *Client) logStdErr() {
for e := range c.writer {
if e.level >= c.LogLevel {
fmt.Fprintf(os.Stderr, "%s\t%s\t%s\t%s\n", e.Timestamp.String(), e.Level, e.Output, e.File)
if e.level >= c.LogLevel && c.matchesNamespace(e.Namespace) {
levelStr := colorizeLevelText(e.Level, e.level)
nsStr := colorize("["+e.Namespace+"]", colorPurple)
fileStr := colorize(e.File, colorGray)
fmt.Fprintf(os.Stderr, "%s\t%s\t%s\t%s\t%s\n", e.Timestamp.String(), levelStr, nsStr, e.Output, fileStr)
}
}
stderrFinished <- true
}
func CreateClient() *Client {
func (c *Client) matchesNamespace(namespace string) bool {
// Empty Namespaces slice means match all
if len(c.Namespaces) == 0 {
return true
}
for _, ns := range c.Namespaces {
if ns == namespace {
return true
}
}
return false
}
func CreateClient(namespaces ...string) *Client {
var client Client
client.initialized = true
client.Namespaces = namespaces
client.writer = make(LogWriter, 1000)
sliceTex.Lock()
clients = append(clients, &client)
@@ -53,19 +74,19 @@ func Flush() {
}
func (c *Client) Destroy() error {
var otherClients []*Client
if !c.initialized {
panic(errors.New("cannot delete uninitialized client, did you use CreateClient?"))
}
sliceTex.Lock()
c.writer = nil
c.initialized = false
var otherClients []*Client
for _, x := range clients {
if x.initialized {
if x != c && x.initialized {
otherClients = append(otherClients, x)
}
}
clients = otherClients
c.writer = nil
sliceTex.Unlock()
return nil
}
@@ -78,9 +99,21 @@ func (c *Client) GetLogLevel() Level {
}
func createLog(e Entry) {
// Track namespace
namespacesMux.Lock()
namespaces[e.Namespace] = true
namespacesMux.Unlock()
sliceTex.Lock()
for _, c := range clients {
func(c *Client, e Entry) {
if c.writer == nil || !c.initialized {
return
}
// Filter by namespace if client has filters specified
if !c.matchesNamespace(e.Namespace) {
return
}
select {
case c.writer <- e:
// try to clear out one of the older entries
@@ -96,6 +129,18 @@ func createLog(e Entry) {
sliceTex.Unlock()
}
// GetNamespaces returns a list of all namespaces that have been used
func GetNamespaces() []string {
namespacesMux.RLock()
defer namespacesMux.RUnlock()
result := make([]string, 0, len(namespaces))
for ns := range namespaces {
result = append(result, ns)
}
return result
}
func SetLogLevel(level Level) {
stderrClient.LogLevel = level
}
@@ -116,20 +161,21 @@ func (c *Client) Get() Entry {
}
// Trace prints out logs on trace level
func Trace(args ...interface{}) {
func Trace(args ...any) {
output := fmt.Sprint(args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(2),
Level: "TRACE",
Namespace: DefaultNamespace,
level: LTrace,
}
createLog(e)
}
// Formatted print for Trace
func Tracef(format string, args ...interface{}) {
func Tracef(format string, args ...any) {
output := fmt.Sprintf(format, args...)
e := Entry{
Timestamp: time.Now(),
@@ -137,12 +183,13 @@ func Tracef(format string, args ...interface{}) {
File: fileInfo(2),
Level: "TRACE",
level: LTrace,
Namespace: DefaultNamespace,
}
createLog(e)
}
// Trace prints out logs on trace level with newline
func Traceln(args ...interface{}) {
func Traceln(args ...any) {
output := fmt.Sprintln(args...)
e := Entry{
Timestamp: time.Now(),
@@ -150,12 +197,13 @@ func Traceln(args ...interface{}) {
File: fileInfo(2),
Level: "TRACE",
level: LTrace,
Namespace: DefaultNamespace,
}
createLog(e)
}
// Debug prints out logs on debug level
func Debug(args ...interface{}) {
func Debug(args ...any) {
output := fmt.Sprint(args...)
e := Entry{
Timestamp: time.Now(),
@@ -163,12 +211,13 @@ func Debug(args ...interface{}) {
File: fileInfo(2),
Level: "DEBUG",
level: LDebug,
Namespace: DefaultNamespace,
}
createLog(e)
}
// Formatted print for Debug
func Debugf(format string, args ...interface{}) {
func Debugf(format string, args ...any) {
output := fmt.Sprintf(format, args...)
e := Entry{
Timestamp: time.Now(),
@@ -176,12 +225,13 @@ func Debugf(format string, args ...interface{}) {
File: fileInfo(2),
Level: "DEBUG",
level: LDebug,
Namespace: DefaultNamespace,
}
createLog(e)
}
// Debug prints out logs on debug level with a newline
func Debugln(args ...interface{}) {
func Debugln(args ...any) {
output := fmt.Sprintln(args...)
e := Entry{
Timestamp: time.Now(),
@@ -189,12 +239,13 @@ func Debugln(args ...interface{}) {
File: fileInfo(2),
Level: "DEBUG",
level: LDebug,
Namespace: DefaultNamespace,
}
createLog(e)
}
// Info prints out logs on info level
func Info(args ...interface{}) {
func Info(args ...any) {
output := fmt.Sprint(args...)
e := Entry{
Timestamp: time.Now(),
@@ -202,12 +253,13 @@ func Info(args ...interface{}) {
File: fileInfo(2),
Level: "INFO",
level: LInfo,
Namespace: DefaultNamespace,
}
createLog(e)
}
// Formatted print for Info
func Infof(format string, args ...interface{}) {
func Infof(format string, args ...any) {
output := fmt.Sprintf(format, args...)
e := Entry{
Timestamp: time.Now(),
@@ -215,12 +267,13 @@ func Infof(format string, args ...interface{}) {
File: fileInfo(2),
Level: "INFO",
level: LInfo,
Namespace: DefaultNamespace,
}
createLog(e)
}
// Info prints out logs on info level with a newline
func Infoln(args ...interface{}) {
func Infoln(args ...any) {
output := fmt.Sprintln(args...)
e := Entry{
Timestamp: time.Now(),
@@ -228,12 +281,13 @@ func Infoln(args ...interface{}) {
File: fileInfo(2),
Level: "INFO",
level: LInfo,
Namespace: DefaultNamespace,
}
createLog(e)
}
// Info prints out logs on info level
func Notice(args ...interface{}) {
func Notice(args ...any) {
output := fmt.Sprint(args...)
e := Entry{
Timestamp: time.Now(),
@@ -241,12 +295,13 @@ func Notice(args ...interface{}) {
File: fileInfo(2),
Level: "NOTICE",
level: LNotice,
Namespace: DefaultNamespace,
}
createLog(e)
}
// Formatted print for Info
func Noticef(format string, args ...interface{}) {
func Noticef(format string, args ...any) {
output := fmt.Sprintf(format, args...)
e := Entry{
Timestamp: time.Now(),
@@ -254,12 +309,13 @@ func Noticef(format string, args ...interface{}) {
File: fileInfo(2),
Level: "NOTICE",
level: LNotice,
Namespace: DefaultNamespace,
}
createLog(e)
}
// Info prints out logs on info level with a newline
func Noticeln(args ...interface{}) {
func Noticeln(args ...any) {
output := fmt.Sprintln(args...)
e := Entry{
Timestamp: time.Now(),
@@ -267,12 +323,13 @@ func Noticeln(args ...interface{}) {
File: fileInfo(2),
Level: "NOTICE",
level: LNotice,
Namespace: DefaultNamespace,
}
createLog(e)
}
// Warn prints out logs on warn level
func Warn(args ...interface{}) {
func Warn(args ...any) {
output := fmt.Sprint(args...)
e := Entry{
Timestamp: time.Now(),
@@ -280,12 +337,13 @@ func Warn(args ...interface{}) {
File: fileInfo(2),
Level: "WARN",
level: LWarn,
Namespace: DefaultNamespace,
}
createLog(e)
}
// Formatted print for Warn
func Warnf(format string, args ...interface{}) {
func Warnf(format string, args ...any) {
output := fmt.Sprintf(format, args...)
e := Entry{
Timestamp: time.Now(),
@@ -293,12 +351,13 @@ func Warnf(format string, args ...interface{}) {
File: fileInfo(2),
Level: "WARN",
level: LWarn,
Namespace: DefaultNamespace,
}
createLog(e)
}
// Newline print for Warn
func Warnln(args ...interface{}) {
func Warnln(args ...any) {
output := fmt.Sprintln(args...)
e := Entry{
Timestamp: time.Now(),
@@ -306,12 +365,13 @@ func Warnln(args ...interface{}) {
File: fileInfo(2),
Level: "WARN",
level: LWarn,
Namespace: DefaultNamespace,
}
createLog(e)
}
// Error prints out logs on error level
func Error(args ...interface{}) {
func Error(args ...any) {
output := fmt.Sprint(args...)
e := Entry{
Timestamp: time.Now(),
@@ -319,12 +379,13 @@ func Error(args ...interface{}) {
File: fileInfo(2),
Level: "ERROR",
level: LError,
Namespace: DefaultNamespace,
}
createLog(e)
}
// Formatted print for error
func Errorf(format string, args ...interface{}) {
func Errorf(format string, args ...any) {
output := fmt.Sprintf(format, args...)
e := Entry{
Timestamp: time.Now(),
@@ -332,12 +393,13 @@ func Errorf(format string, args ...interface{}) {
File: fileInfo(2),
Level: "ERROR",
level: LError,
Namespace: DefaultNamespace,
}
createLog(e)
}
// Error prints out logs on error level with a newline
func Errorln(args ...interface{}) {
func Errorln(args ...any) {
output := fmt.Sprintln(args...)
e := Entry{
Timestamp: time.Now(),
@@ -345,12 +407,13 @@ func Errorln(args ...interface{}) {
File: fileInfo(2),
Level: "ERROR",
level: LError,
Namespace: DefaultNamespace,
}
createLog(e)
}
// Panic prints out logs on panic level
func Panic(args ...interface{}) {
func Panic(args ...any) {
output := fmt.Sprint(args...)
e := Entry{
Timestamp: time.Now(),
@@ -358,9 +421,10 @@ func Panic(args ...interface{}) {
File: fileInfo(2),
Level: "PANIC",
level: LPanic,
Namespace: DefaultNamespace,
}
createLog(e)
if len(args) >= 0 {
if len(args) > 0 {
switch args[0].(type) {
case error:
panic(args[0])
@@ -373,7 +437,7 @@ func Panic(args ...interface{}) {
}
// Formatted print for panic
func Panicf(format string, args ...interface{}) {
func Panicf(format string, args ...any) {
output := fmt.Sprintf(format, args...)
e := Entry{
Timestamp: time.Now(),
@@ -381,9 +445,10 @@ func Panicf(format string, args ...interface{}) {
File: fileInfo(2),
Level: "PANIC",
level: LPanic,
Namespace: DefaultNamespace,
}
createLog(e)
if len(args) >= 0 {
if len(args) > 0 {
switch args[0].(type) {
case error:
panic(args[0])
@@ -395,7 +460,7 @@ func Panicf(format string, args ...interface{}) {
panic(errors.New(output))
}
func Panicln(args ...interface{}) {
func Panicln(args ...any) {
output := fmt.Sprintln(args...)
e := Entry{
Timestamp: time.Now(),
@@ -403,9 +468,10 @@ func Panicln(args ...interface{}) {
File: fileInfo(2),
Level: "PANIC",
level: LPanic,
Namespace: DefaultNamespace,
}
createLog(e)
if len(args) >= 0 {
if len(args) > 0 {
switch args[0].(type) {
case error:
panic(args[0])
@@ -418,7 +484,7 @@ func Panicln(args ...interface{}) {
}
// Fatal prints out logs on fatal level
func Fatal(args ...interface{}) {
func Fatal(args ...any) {
output := fmt.Sprint(args...)
e := Entry{
Timestamp: time.Now(),
@@ -426,6 +492,7 @@ func Fatal(args ...interface{}) {
File: fileInfo(2),
Level: "FATAL",
level: LFatal,
Namespace: DefaultNamespace,
}
createLog(e)
Flush()
@@ -433,7 +500,7 @@ func Fatal(args ...interface{}) {
}
// Formatted print for fatal
func Fatalf(format string, args ...interface{}) {
func Fatalf(format string, args ...any) {
output := fmt.Sprintf(format, args...)
e := Entry{
Timestamp: time.Now(),
@@ -441,13 +508,14 @@ func Fatalf(format string, args ...interface{}) {
File: fileInfo(2),
Level: "FATAL",
level: LFatal,
Namespace: DefaultNamespace,
}
createLog(e)
Flush()
os.Exit(1)
}
func Fatalln(args ...interface{}) {
func Fatalln(args ...any) {
output := fmt.Sprintln(args...)
e := Entry{
Timestamp: time.Now(),
@@ -455,21 +523,22 @@ func Fatalln(args ...interface{}) {
File: fileInfo(2),
Level: "FATAL",
level: LFatal,
Namespace: DefaultNamespace,
}
createLog(e)
Flush()
os.Exit(1)
}
func Print(args ...interface{}) {
func Print(args ...any) {
Info(args...)
}
func Printf(format string, args ...interface{}) {
func Printf(format string, args ...any) {
Infof(format, args...)
}
func Println(args ...interface{}) {
func Println(args ...any) {
Infoln(args...)
}
@@ -487,3 +556,37 @@ func fileInfo(skip int) string {
}
return fmt.Sprintf("%s:%d", file, line)
}
// Broadcast sends an [Entry] to all registered clients. This is the public
// entry point used by adapter packages (such as the slog handler) that
// construct entries themselves. The unexported level field is inferred from
// [Entry.Level] when not already set.
func Broadcast(e Entry) {
if e.level == 0 && e.Level != "" && e.Level != "TRACE" {
e.level = parseLevelString(e.Level)
}
createLog(e)
}
func parseLevelString(s string) Level {
switch s {
case "TRACE":
return LTrace
case "DEBUG":
return LDebug
case "INFO":
return LInfo
case "NOTICE":
return LNotice
case "WARN":
return LWarn
case "ERROR":
return LError
case "PANIC":
return LPanic
case "FATAL":
return LFatal
default:
return LInfo
}
}

View File

@@ -13,7 +13,7 @@ func TestCreateDestroy(t *testing.T) {
t.Errorf("Expected 1 client, but found %d", len(clients))
}
// Create a new client, ensure it's added
c := CreateClient()
c := CreateClient("test")
if len(clients) != 2 {
t.Errorf("Expected 2 clients, but found %d", len(clients))
}
@@ -27,7 +27,7 @@ func TestCreateDestroy(t *testing.T) {
// SetLogLevel set log level of logger
func TestSetLogLevel(t *testing.T) {
logLevels := [...]Level{LTrace, LDebug, LInfo, LWarn, LError, LPanic, LFatal}
c := CreateClient()
c := CreateClient("test")
for _, x := range logLevels {
c.SetLogLevel(x)
if c.GetLogLevel() != x {
@@ -38,7 +38,7 @@ func TestSetLogLevel(t *testing.T) {
}
func BenchmarkDebugSerial(b *testing.B) {
c := CreateClient()
c := CreateClient("test")
var x sync.WaitGroup
x.Add(b.N)
for i := 0; i < b.N; i++ {
@@ -55,7 +55,7 @@ func BenchmarkDebugSerial(b *testing.B) {
// Trace ensure logs come out in the right order
func TestOrder(t *testing.T) {
testString := "Testing trace: "
c := CreateClient()
c := CreateClient(DefaultNamespace)
c.SetLogLevel(LTrace)
for i := 0; i < 5000; i++ {

View File

@@ -7,243 +7,272 @@ import (
"time"
)
func Default() *Logger {
return &Logger{FileInfoDepth: 0, Namespace: DefaultNamespace}
}
func NewLogger(namespace string) *Logger {
if namespace == "" {
namespace = DefaultNamespace
}
return &Logger{FileInfoDepth: 0, Namespace: namespace}
}
func (l *Logger) SetInfoDepth(depth int) {
l.FileInfoDepth = depth
}
// Trace prints out logs on trace level
func (l Logger) Trace(args ...interface{}) {
func (l Logger) Trace(args ...any) {
output := fmt.Sprint(args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "TRACE",
level: LTrace,
Namespace: l.Namespace,
}
createLog(e)
}
// Formatted print for Trace
func (l Logger) Tracef(format string, args ...interface{}) {
func (l Logger) Tracef(format string, args ...any) {
output := fmt.Sprintf(format, args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "TRACE",
level: LTrace,
Namespace: l.Namespace,
}
createLog(e)
}
// Trace prints out logs on trace level with newline
func (l Logger) Traceln(args ...interface{}) {
func (l Logger) Traceln(args ...any) {
output := fmt.Sprintln(args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "TRACE",
level: LTrace,
Namespace: l.Namespace,
}
createLog(e)
}
// Debug prints out logs on debug level
func (l Logger) Debug(args ...interface{}) {
func (l Logger) Debug(args ...any) {
output := fmt.Sprint(args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "DEBUG",
level: LDebug,
Namespace: l.Namespace,
}
createLog(e)
}
// Formatted print for Debug
func (l Logger) Debugf(format string, args ...interface{}) {
func (l Logger) Debugf(format string, args ...any) {
output := fmt.Sprintf(format, args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "DEBUG",
level: LDebug,
Namespace: l.Namespace,
}
createLog(e)
}
// Info prints out logs on info level
func (l Logger) Info(args ...interface{}) {
func (l Logger) Info(args ...any) {
output := fmt.Sprint(args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "INFO",
level: LInfo,
Namespace: l.Namespace,
}
createLog(e)
}
// Formatted print for Info
func (l Logger) Infof(format string, args ...interface{}) {
func (l Logger) Infof(format string, args ...any) {
output := fmt.Sprintf(format, args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "INFO",
level: LInfo,
Namespace: l.Namespace,
}
createLog(e)
}
// Info prints out logs on info level with newline
func (l Logger) Infoln(args ...interface{}) {
func (l Logger) Infoln(args ...any) {
output := fmt.Sprintln(args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "INFO",
level: LInfo,
Namespace: l.Namespace,
}
createLog(e)
}
// Notice prints out logs on notice level
func (l Logger) Notice(args ...interface{}) {
func (l Logger) Notice(args ...any) {
output := fmt.Sprint(args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "NOTICE",
level: LNotice,
Namespace: l.Namespace,
}
createLog(e)
}
// Formatted print for Notice
func (l Logger) Noticef(format string, args ...interface{}) {
func (l Logger) Noticef(format string, args ...any) {
output := fmt.Sprintf(format, args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "NOTICE",
level: LNotice,
Namespace: l.Namespace,
}
createLog(e)
}
// Notice prints out logs on notice level with newline
func (l Logger) Noticeln(args ...interface{}) {
func (l Logger) Noticeln(args ...any) {
output := fmt.Sprintln(args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "NOTICE",
level: LNotice,
Namespace: l.Namespace,
}
createLog(e)
}
// Warn prints out logs on warn level
func (l Logger) Warn(args ...interface{}) {
func (l Logger) Warn(args ...any) {
output := fmt.Sprint(args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "WARN",
level: LWarn,
Namespace: l.Namespace,
}
createLog(e)
}
// Formatted print for Warn
func (l Logger) Warnf(format string, args ...interface{}) {
func (l Logger) Warnf(format string, args ...any) {
output := fmt.Sprintf(format, args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "WARN",
level: LWarn,
Namespace: l.Namespace,
}
createLog(e)
}
// Warn prints out logs on warn level with a newline
func (l Logger) Warnln(args ...interface{}) {
func (l Logger) Warnln(args ...any) {
output := fmt.Sprintln(args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "WARN",
level: LWarn,
Namespace: l.Namespace,
}
createLog(e)
}
// Error prints out logs on error level
func (l Logger) Error(args ...interface{}) {
func (l Logger) Error(args ...any) {
output := fmt.Sprint(args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "ERROR",
level: LError,
Namespace: l.Namespace,
}
createLog(e)
}
// Formatted print for error
func (l Logger) Errorf(format string, args ...interface{}) {
func (l Logger) Errorf(format string, args ...any) {
output := fmt.Sprintf(format, args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "ERROR",
level: LError,
Namespace: l.Namespace,
}
createLog(e)
}
// Error prints out logs on error level with a new line
func (l Logger) Errorln(args ...interface{}) {
func (l Logger) Errorln(args ...any) {
output := fmt.Sprintln(args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "ERROR",
level: LError,
Namespace: l.Namespace,
}
createLog(e)
}
// Panic prints out logs on panic level
func (l Logger) Panic(args ...interface{}) {
func (l Logger) Panic(args ...any) {
output := fmt.Sprint(args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "PANIC",
level: LPanic,
Namespace: l.Namespace,
}
createLog(e)
if len(args) >= 0 {
if len(args) > 0 {
switch args[0].(type) {
case error:
panic(args[0])
@@ -256,17 +285,18 @@ func (l Logger) Panic(args ...interface{}) {
}
// Formatted print for panic
func (l Logger) Panicf(format string, args ...interface{}) {
func (l Logger) Panicf(format string, args ...any) {
output := fmt.Sprintf(format, args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "PANIC",
level: LPanic,
Namespace: l.Namespace,
}
createLog(e)
if len(args) >= 0 {
if len(args) > 0 {
switch args[0].(type) {
case error:
panic(args[0])
@@ -279,17 +309,18 @@ func (l Logger) Panicf(format string, args ...interface{}) {
}
// Panic prints out logs on panic level with a newline
func (l Logger) Panicln(args ...interface{}) {
func (l Logger) Panicln(args ...any) {
output := fmt.Sprintln(args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "PANIC",
level: LPanic,
Namespace: l.Namespace,
}
createLog(e)
if len(args) >= 0 {
if len(args) > 0 {
switch args[0].(type) {
case error:
panic(args[0])
@@ -302,14 +333,15 @@ func (l Logger) Panicln(args ...interface{}) {
}
// Fatal prints out logs on fatal level
func (l Logger) Fatal(args ...interface{}) {
func (l Logger) Fatal(args ...any) {
output := fmt.Sprint(args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "FATAL",
level: LFatal,
Namespace: l.Namespace,
}
createLog(e)
Flush()
@@ -317,14 +349,15 @@ func (l Logger) Fatal(args ...interface{}) {
}
// Formatted print for fatal
func (l Logger) Fatalf(format string, args ...interface{}) {
func (l Logger) Fatalf(format string, args ...any) {
output := fmt.Sprintf(format, args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "FATAL",
level: LFatal,
Namespace: l.Namespace,
}
createLog(e)
Flush()
@@ -332,14 +365,15 @@ func (l Logger) Fatalf(format string, args ...interface{}) {
}
// Fatal prints fatal level with a new line
func (l Logger) Fatalln(args ...interface{}) {
func (l Logger) Fatalln(args ...any) {
output := fmt.Sprintln(args...)
e := Entry{
Timestamp: time.Now(),
Output: output,
File: fileInfo(l.FileInfoDepth),
File: fileInfo(2 + l.FileInfoDepth),
Level: "FATAL",
level: LFatal,
Namespace: l.Namespace,
}
createLog(e)
Flush()
@@ -347,16 +381,16 @@ func (l Logger) Fatalln(args ...interface{}) {
}
// Handles print to info
func (l Logger) Print(args ...interface{}) {
func (l Logger) Print(args ...any) {
l.Info(args...)
}
// Handles formatted print to info
func (l Logger) Printf(format string, args ...interface{}) {
func (l Logger) Printf(format string, args ...any) {
l.Infof(format, args...)
}
// Handles print to info with new line
func (l Logger) Println(args ...interface{}) {
func (l Logger) Println(args ...any) {
l.Infoln(args...)
}

View File

@@ -2,9 +2,6 @@ package log
import "time"
type LogWriter chan Entry
type Level int
const (
LTrace Level = iota
LDebug
@@ -16,20 +13,28 @@ const (
LFatal
)
type Client struct {
LogLevel Level `json:"level"`
writer LogWriter
initialized bool
}
const DefaultNamespace = "default"
type Entry struct {
Timestamp time.Time `json:"timestamp"`
Output string `json:"output"`
File string `json:"file"`
Level string `json:"level"`
level Level
}
type (
LogWriter chan Entry
Level int
type Logger struct {
FileInfoDepth int
}
Client struct {
LogLevel Level `json:"level"`
Namespaces []string `json:"namespaces"` // Empty slice means all namespaces
writer LogWriter
initialized bool
}
Entry struct {
Timestamp time.Time `json:"timestamp"`
Output string `json:"output"`
File string `json:"file"`
Level string `json:"level"`
Namespace string `json:"namespace"`
level Level
}
Logger struct {
FileInfoDepth int
Namespace string
}
)

30
main.go
View File

@@ -5,20 +5,33 @@ import (
"net/http"
"time"
"github.com/taigrr/log-socket/browser"
logger "github.com/taigrr/log-socket/log"
"github.com/taigrr/log-socket/ws"
"github.com/taigrr/log-socket/v2/browser"
logger "github.com/taigrr/log-socket/v2/log"
"github.com/taigrr/log-socket/v2/ws"
)
var addr = flag.String("addr", "0.0.0.0:8080", "http service address")
func generateLogs() {
// Create loggers for different namespaces
apiLogger := logger.NewLogger("api")
dbLogger := logger.NewLogger("database")
authLogger := logger.NewLogger("auth")
for {
logger.Info("This is an info log!")
logger.Trace("This is a trace log!")
logger.Debug("This is a debug log!")
logger.Warn("This is a warn log!")
logger.Error("This is an error log!")
logger.Info("This is a default namespace log!")
apiLogger.Info("API request received")
apiLogger.Debug("Processing API call")
dbLogger.Info("Database query executed")
dbLogger.Warn("Slow query detected")
authLogger.Info("User authentication successful")
authLogger.Error("Failed login attempt detected")
logger.Trace("This is a trace log in default namespace!")
logger.Warn("This is a warning in default namespace!")
time.Sleep(2 * time.Second)
}
}
@@ -27,6 +40,7 @@ func main() {
defer logger.Flush()
flag.Parse()
http.HandleFunc("/ws", ws.LogSocketHandler)
http.HandleFunc("/api/namespaces", ws.NamespacesHandler)
http.HandleFunc("/", browser.LogSocketViewHandler)
go generateLogs()
logger.Fatal(http.ListenAndServe(*addr, nil))

165
slog/handler.go Normal file
View File

@@ -0,0 +1,165 @@
// Package slog provides a [log/slog.Handler] that routes structured log
// records into the log-socket broadcasting system, giving every slog-based
// caller free WebSocket streaming and the browser viewer UI.
package slog
import (
"context"
"fmt"
"log/slog"
"runtime"
"strings"
"github.com/taigrr/log-socket/v2/log"
)
// Handler implements [slog.Handler] by converting each [slog.Record] into a
// log-socket [log.Entry] and feeding it through the normal broadcast path.
//
// Attributes accumulated via [Handler.WithAttrs] are prepended to the log
// message as key=value pairs. Groups set via [Handler.WithGroup] prefix
// attribute keys with "group.".
type Handler struct {
namespace string
level slog.Level
attrs []slog.Attr
groups []string
}
// ensure interface compliance at compile time.
var _ slog.Handler = (*Handler)(nil)
// Option configures a [Handler].
type Option func(*Handler)
// WithNamespace sets the log-socket namespace for entries produced by this
// handler. If empty, [log.DefaultNamespace] is used.
func WithNamespace(ns string) Option {
return func(h *Handler) {
h.namespace = ns
}
}
// WithLevel sets the minimum slog level the handler will accept.
func WithLevel(l slog.Level) Option {
return func(h *Handler) {
h.level = l
}
}
// NewHandler returns a new [Handler] that writes to the log-socket broadcast
// system. Options may be used to set the namespace and minimum level.
func NewHandler(opts ...Option) *Handler {
h := &Handler{
namespace: log.DefaultNamespace,
level: slog.LevelDebug,
}
for _, o := range opts {
o(h)
}
return h
}
// Enabled reports whether the handler is configured to process records at
// the given level.
func (h *Handler) Enabled(_ context.Context, level slog.Level) bool {
return level >= h.level
}
// Handle converts r into a log-socket Entry and broadcasts it.
func (h *Handler) Handle(_ context.Context, r slog.Record) error {
var b strings.Builder
b.WriteString(r.Message)
// Append pre-collected attrs.
for _, a := range h.attrs {
writeAttr(&b, h.groups, a)
}
// Append record-level attrs.
r.Attrs(func(a slog.Attr) bool {
writeAttr(&b, h.groups, a)
return true
})
file := "???"
if r.PC != 0 {
fs := runtime.CallersFrames([]uintptr{r.PC})
f, _ := fs.Next()
if f.File != "" {
short := f.File
if idx := strings.LastIndex(short, "/"); idx >= 0 {
short = short[idx+1:]
}
file = fmt.Sprintf("%s:%d", short, f.Line)
}
}
e := log.Entry{
Timestamp: r.Time,
Output: b.String(),
File: file,
Level: slogLevelToString(r.Level),
Namespace: h.namespace,
}
log.Broadcast(e)
return nil
}
// WithAttrs returns a new Handler with the given attributes appended.
func (h *Handler) WithAttrs(attrs []slog.Attr) slog.Handler {
h2 := h.clone()
h2.attrs = append(h2.attrs, attrs...)
return h2
}
// WithGroup returns a new Handler where subsequent attributes are nested
// under the given group name.
func (h *Handler) WithGroup(name string) slog.Handler {
if name == "" {
return h
}
h2 := h.clone()
h2.groups = append(h2.groups, name)
return h2
}
func (h *Handler) clone() *Handler {
h2 := &Handler{
namespace: h.namespace,
level: h.level,
attrs: make([]slog.Attr, len(h.attrs)),
groups: make([]string, len(h.groups)),
}
copy(h2.attrs, h.attrs)
copy(h2.groups, h.groups)
return h2
}
func writeAttr(b *strings.Builder, groups []string, a slog.Attr) {
a.Value = a.Value.Resolve()
if a.Equal(slog.Attr{}) {
return
}
b.WriteByte(' ')
for _, g := range groups {
b.WriteString(g)
b.WriteByte('.')
}
b.WriteString(a.Key)
b.WriteByte('=')
b.WriteString(a.Value.String())
}
func slogLevelToString(l slog.Level) string {
switch {
case l >= slog.LevelError:
return "ERROR"
case l >= slog.LevelWarn:
return "WARN"
case l >= slog.LevelInfo:
return "INFO"
default:
return "DEBUG"
}
}

118
slog/handler_test.go Normal file
View File

@@ -0,0 +1,118 @@
package slog
import (
"context"
"log/slog"
"testing"
"time"
"github.com/taigrr/log-socket/v2/log"
)
// getWithTimeout reads from a log client with a timeout to avoid hanging tests.
func getWithTimeout(c *log.Client, timeout time.Duration) (log.Entry, bool) {
ch := make(chan log.Entry, 1)
go func() { ch <- c.Get() }()
select {
case e := <-ch:
return e, true
case <-time.After(timeout):
return log.Entry{}, false
}
}
func TestHandler_Enabled(t *testing.T) {
h := NewHandler(WithLevel(slog.LevelWarn))
if h.Enabled(context.Background(), slog.LevelInfo) {
t.Error("expected Info to be disabled when min level is Warn")
}
if !h.Enabled(context.Background(), slog.LevelWarn) {
t.Error("expected Warn to be enabled")
}
if !h.Enabled(context.Background(), slog.LevelError) {
t.Error("expected Error to be enabled")
}
}
func TestHandler_Handle(t *testing.T) {
c := log.CreateClient()
defer c.Destroy()
c.SetLogLevel(log.LTrace)
h := NewHandler(WithNamespace("test-ns"))
logger := slog.New(h)
logger.Info("hello world", "key", "value")
e, ok := getWithTimeout(c, time.Second)
if !ok {
t.Fatal("timed out waiting for log entry")
}
if e.Namespace != "test-ns" {
t.Errorf("namespace = %q, want %q", e.Namespace, "test-ns")
}
if e.Level != "INFO" {
t.Errorf("level = %q, want INFO", e.Level)
}
if e.Output == "" {
t.Error("output should not be empty")
}
}
func TestHandler_WithAttrs(t *testing.T) {
c := log.CreateClient()
defer c.Destroy()
c.SetLogLevel(log.LTrace)
h := NewHandler()
h2 := h.WithAttrs([]slog.Attr{slog.String("service", "api")})
logger := slog.New(h2)
logger.Info("request")
e, ok := getWithTimeout(c, time.Second)
if !ok {
t.Fatal("timed out")
}
if e.Output != "request service=api" {
t.Errorf("output = %q, want %q", e.Output, "request service=api")
}
}
func TestHandler_WithGroup(t *testing.T) {
c := log.CreateClient()
defer c.Destroy()
c.SetLogLevel(log.LTrace)
h := NewHandler()
h2 := h.WithGroup("http").WithAttrs([]slog.Attr{slog.Int("status", 200)})
logger := slog.New(h2)
logger.Info("done")
e, ok := getWithTimeout(c, time.Second)
if !ok {
t.Fatal("timed out")
}
if e.Output != "done http.status=200" {
t.Errorf("output = %q, want %q", e.Output, "done http.status=200")
}
}
func TestSlogLevelMapping(t *testing.T) {
tests := []struct {
level slog.Level
want string
}{
{slog.LevelDebug, "DEBUG"},
{slog.LevelInfo, "INFO"},
{slog.LevelWarn, "WARN"},
{slog.LevelError, "ERROR"},
}
for _, tt := range tests {
got := slogLevelToString(tt.level)
if got != tt.want {
t.Errorf("slogLevelToString(%v) = %q, want %q", tt.level, got, tt.want)
}
}
}

17
ws/namespaces.go Normal file
View File

@@ -0,0 +1,17 @@
package ws
import (
"encoding/json"
"net/http"
logger "github.com/taigrr/log-socket/v2/log"
)
// NamespacesHandler returns a JSON list of all namespaces that have been used
func NamespacesHandler(w http.ResponseWriter, r *http.Request) {
namespaces := logger.GetNamespaces()
w.Header().Set("Content-Type", "application/json")
json.NewEncoder(w).Encode(map[string]interface{}{
"namespaces": namespaces,
})
}

View File

@@ -3,23 +3,34 @@ package ws
import (
"encoding/json"
"net/http"
"strings"
"github.com/gorilla/websocket"
logger "github.com/taigrr/log-socket/log"
logger "github.com/taigrr/log-socket/v2/log"
)
// var addr = flag.String("addr", "localhost:8080", "http service address")
var upgrader = websocket.Upgrader{} // use default options
func SetUpgrader(u websocket.Upgrader) {
upgrader = u
}
func LogSocketHandler(w http.ResponseWriter, r *http.Request) {
// Get namespaces from query parameter, comma-separated
// Empty or missing means all namespaces
namespacesParam := r.URL.Query().Get("namespaces")
var namespaces []string
if namespacesParam != "" {
namespaces = strings.Split(namespacesParam, ",")
}
c, err := upgrader.Upgrade(w, r, nil)
if err != nil {
logger.Error("upgrade:", err)
return
}
defer c.Close()
lc := logger.CreateClient()
lc := logger.CreateClient(namespaces...)
defer lc.Destroy()
lc.SetLogLevel(logger.LTrace)
logger.Info("Websocket client attached.")
@@ -28,7 +39,7 @@ func LogSocketHandler(w http.ResponseWriter, r *http.Request) {
logJSON, _ := json.Marshal(logEvent)
err = c.WriteMessage(websocket.TextMessage, logJSON)
if err != nil {
logger.Error("write:", err)
logger.Warn("write:", err)
break
}
}