fix proxy

proxy/proxy.go

@@ -9,6 +9,9 @@ import (
 )
 
 func GetClient(proxy string) (*http.Client, error) {
+	if proxy == "" {
+		return http.DefaultClient, nil
+	}
 	proxyUrl, err := url.Parse(proxy)
 	if err != nil {
 		return nil, fmt.Errorf("failed to parse proxyUrl, url:%s, err: %w", proxy, err)
@@ -28,20 +31,25 @@ func unixSocks5Proxy(path string) (*http.Client, error) {
 	}
 	ctxDialer, ok := dialer.(proxy.ContextDialer)
 	if !ok {
-		return nil, fmt.Errorf("proxy.SOCKS5 did not return a ContextDialer") // This should never happen
+		panic("proxy.SOCKS5 did not return a ContextDialer")
 	}
-
-	return &http.Client{
-		Transport: &http.Transport{
-			DialContext: ctxDialer.DialContext,
-		},
-	}, nil
+	trans := defaultTransport()
+	trans.DialContext = ctxDialer.DialContext
+	trans.Proxy = nil
+	return &http.Client{Transport: trans}, nil
 }
 
 func proxyHttp(proxyUrl *url.URL) (*http.Client, error) {
-	return &http.Client{
-		Transport: &http.Transport{
-			Proxy: http.ProxyURL(proxyUrl),
-		},
-	}, nil
+	trans := defaultTransport()
+	trans.Proxy = http.ProxyURL(proxyUrl)
+	return &http.Client{Transport: trans}, nil
+}
+
+func defaultTransport() *http.Transport {
+	transPtr, ok := http.DefaultTransport.(*http.Transport)
+	if !ok {
+		panic("http.DefaultTransport is not a *http.Transport")
+	}
+	trans := transPtr.Clone()
+	return trans
 }