edge proxy support + updated readme

util/http.go

@@ -10,34 +10,28 @@ import (
 var (
 	httpSession     *http.Client
 	httpSessionOnce sync.Once
+	baseTransport   = &http.Transport{
+		Proxy: http.ProxyFromEnvironment,
+		DialContext: (&net.Dialer{
+			Timeout:   30 * time.Second,
+			KeepAlive: 30 * time.Second,
+		}).DialContext,
+		ForceAttemptHTTP2:     true,
+		MaxIdleConns:          100,
+		IdleConnTimeout:       90 * time.Second,
+		TLSHandshakeTimeout:   5 * time.Second,
+		ExpectContinueTimeout: 1 * time.Second,
+		MaxIdleConnsPerHost:   100,
+		MaxConnsPerHost:       100,
+		ResponseHeaderTimeout: 10 * time.Second,
+		DisableCompression:    false,
+	}
 )
 
 func GetHTTPSession() *http.Client {
 	httpSessionOnce.Do(func() {
-		transport := &http.Transport{
-			Proxy: http.ProxyFromEnvironment,
-			DialContext: (&net.Dialer{
-				Timeout:   30 * time.Second,
-				KeepAlive: 30 * time.Second,
-			}).DialContext,
-			ForceAttemptHTTP2: true,
-
-			MaxIdleConns:    100,
-			IdleConnTimeout: 90 * time.Second,
-
-			TLSHandshakeTimeout:   5 * time.Second,
-			ExpectContinueTimeout: 1 * time.Second,
-
-			MaxIdleConnsPerHost: 100,
-			MaxConnsPerHost:     100,
-
-			ResponseHeaderTimeout: 10 * time.Second,
-
-			DisableCompression: false,
-		}
-
 		httpSession = &http.Client{
-			Transport: transport,
+			Transport: baseTransport,
 			Timeout:   60 * time.Second,
 		}
 	})