feat(proxy): supports custom proxy headers

connection_proxy.go

@@ -31,6 +31,8 @@ type proxyDialer struct {
 
 	tr         *http2.Transport
 	ForceHTTP2 bool
+
+	sess *Session
 }
 
 const (
@@ -74,6 +76,7 @@ func (s *Session) assignProxy(proxy string) error {
 	s.ProxyDialer = &proxyDialer{
 		ProxyURL:      parsed,
 		DefaultHeader: make(http.Header),
+		sess:          s,
 	}
 
 	if parsed.User != nil {
@@ -122,6 +125,16 @@ func (c *proxyDialer) DialContext(ctx context.Context, userAgent, network, addre
 		req.Header[k] = v
 	}
 
+	for k, v := range c.sess.ProxyHeader {
+		if k == http.HeaderOrderKey {
+			for _, vv := range v {
+				req.Header[http.HeaderOrderKey] = append(req.Header[http.HeaderOrderKey], strings.ToLower(vv))
+			}
+		} else {
+			req.Header[k] = v
+		}
+	}
+
 	if ctxHeader, ctxHasHeader := ctx.Value(ContextKeyHeader{}).(http.Header); ctxHasHeader {
 		for k, v := range ctxHeader {
 			req.Header[k] = v

structs.go

@@ -69,6 +69,7 @@ type Session struct {
 
 	// Maximum number of redirects to follow.
 	MaxRedirects uint
+
 	// Maximum time to wait for request to complete.
 	TimeOut time.Duration
 
@@ -104,14 +105,22 @@ type Session struct {
 	// Deprecated: This field is ignored as pin verification is always true.
 	// To disable pin verification, use InsecureSkipVerify.
 	VerifyPins bool
+
 	// If true, server's certificate is not verified (insecure: this may facilitate attack from middleman).
 	InsecureSkipVerify bool
 
 	// Headers for User-Agent and Sec-Ch-Ua, respectively.
 	UserAgent string
 
+	// HeaderPriority specifies the priority of the request's headers.
+	// As this information is not included in the Akamai fingerprint, you may have to specify it manually.
+	// Note that you can also specify the browser in the session so that this is done automatically.
 	HeaderPriority *http2.PriorityParam
 
+	// ProxyHeader defines the headers used for the CONNECT method to the proxy,
+	// you may define the order with the http.HeaderOrderKey
+	ProxyHeader http.Header
+
 	proxyConnected bool
 
 	dump       bool
@@ -121,7 +130,6 @@ type Session struct {
 	logging       bool
 	loggingIgnore []*regexp.Regexp
 
-	// Context for cancellable and timeout operations.
 	ctx context.Context
 
 	mu *sync.Mutex