add API token support for Cloudflare

README.md

@@ -112,7 +112,9 @@ Usage of ./godns:
 
 ### Config example for Cloudflare
 
-For Cloudflare, you need to provide email & Global API Key as password, and config all the domains & subdomains.
+For Cloudflare, you need to provide the email & Global API Key as password (or to use the API token) and config all the domains & subdomains.
+
+* Using email & Global API Key
 
 ```json
 {
@@ -133,6 +135,26 @@ For Cloudflare, you need to provide email & Global API Key as password, and conf
 }
 ```
 
+* Using the API Token
+
+```json
+{
+  "provider": "Cloudflare",
+  "login_token": "API Token",
+  "domains": [{
+      "domain_name": "example.com",
+      "sub_domains": ["www","test"]
+    },{
+      "domain_name": "example2.com",
+      "sub_domains": ["www","test"]
+    }
+  ],
+  "ip_url": "https://myip.biturl.top",
+  "interval": 300,
+  "socks5_proxy": ""
+}
+```
+
 ### Config example for DNSPod
 
 For DNSPod, you need to provide your API Token(you can create it [here](https://www.dnspod.cn/console/user/security)), and config all the domains & subdomains.

handler/cloudflare/cloudflare_handler.go

@@ -40,7 +40,7 @@ type DNSRecord struct {
 	Proxied bool   `json:"proxied"`
 	Type    string `json:"type"`
 	ZoneID  string `json:"zone_id"`
-	TTL	int32  `json:"ttl"`
+	TTL     int32  `json:"ttl"`
 }
 
 // SetIP updates DNSRecord.IP
@@ -146,8 +146,14 @@ func (handler *Handler) newRequest(method, url string, body io.Reader) (*http.Re
 
 	req, _ := http.NewRequest(method, handler.API+url, body)
 	req.Header.Set("Content-Type", "application/json")
-	req.Header.Set("X-Auth-Email", handler.Configuration.Email)
-	req.Header.Set("X-Auth-Key", handler.Configuration.Password)
+
+	if handler.Configuration.Email != "" && handler.Configuration.Password != "" {
+		req.Header.Set("X-Auth-Email", handler.Configuration.Email)
+		req.Header.Set("X-Auth-Key", handler.Configuration.Password)
+	} else if handler.Configuration.LoginToken != "" {
+		req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", handler.Configuration.LoginToken))
+	}
+
 	return req, client
 }
 

utils.go

@@ -196,11 +196,13 @@ func CheckSettings(config *Settings) error {
 			return errors.New("password cannot be empty")
 		}
 	} else if config.Provider == CLOUDFLARE {
-		if config.Email == "" {
-			return errors.New("email cannot be empty")
-		}
-		if config.Password == "" {
-			return errors.New("password cannot be empty")
+		if config.LoginToken == "" {
+			if config.Email == "" {
+				return errors.New("email cannot be empty")
+			}
+			if config.Password == "" {
+				return errors.New("password cannot be empty")
+			}
 		}
 	} else if config.Provider == ALIDNS {
 		if config.Email == "" {