feat: support webhook proxy configuration

alert/sender/webhook.go

@@ -13,6 +13,7 @@ import (
 	"github.com/ccfos/nightingale/v6/alert/astats"
 	"github.com/ccfos/nightingale/v6/models"
 	"github.com/ccfos/nightingale/v6/pkg/ctx"
+	"github.com/ccfos/nightingale/v6/pkg/poster"
 
 	"github.com/toolkits/pkg/logger"
 )
@@ -59,11 +60,17 @@ func sendWebhook(webhook *models.Webhook, event interface{}, stats *astats.Stats
 	if webhook != nil {
 		insecureSkipVerify = webhook.SkipVerify
 	}
+
+	transport := &http.Transport{
+		TLSClientConfig: &tls.Config{InsecureSkipVerify: insecureSkipVerify},
+	}
+	if poster.UseProxy(conf.Url) {
+		transport.Proxy = http.ProxyFromEnvironment
+	}
+
 	client := http.Client{
-		Timeout: time.Duration(conf.Timeout) * time.Second,
-		Transport: &http.Transport{
-			TLSClientConfig: &tls.Config{InsecureSkipVerify: insecureSkipVerify},
-		},
+		Timeout:   time.Duration(conf.Timeout) * time.Second,
+		Transport: transport,
 	}
 
 	stats.AlertNotifyTotal.WithLabelValues(channel).Inc()

pkg/poster/post.go

@@ -63,7 +63,7 @@ func GetByUrl[T any](url string, cfg conf.CenterApi) (T, error) {
 		Timeout: time.Duration(cfg.Timeout) * time.Millisecond,
 	}
 
-	if useProxy(url) {
+	if UseProxy(url) {
 		client.Transport = ProxyTransporter
 	}
 
@@ -147,7 +147,7 @@ func PostByUrl[T any](url string, cfg conf.CenterApi, v interface{}) (t T, err e
 		Timeout: time.Duration(cfg.Timeout) * time.Millisecond,
 	}
 
-	if useProxy(url) {
+	if UseProxy(url) {
 		client.Transport = ProxyTransporter
 	}
 
@@ -195,7 +195,7 @@ var ProxyTransporter = &http.Transport{
 	Proxy: http.ProxyFromEnvironment,
 }
 
-func useProxy(url string) bool {
+func UseProxy(url string) bool {
 	// N9E_PROXY_URL=oapi.dingtalk.com,feishu.com
 	patterns := os.Getenv("N9E_PROXY_URL")
 	if patterns != "" {
@@ -228,7 +228,7 @@ func PostJSON(url string, timeout time.Duration, v interface{}, retries ...int)
 		Timeout: timeout,
 	}
 
-	if useProxy(url) {
+	if UseProxy(url) {
 		client.Transport = ProxyTransporter
 	}