fix(osi): 加固 Phase 0 验收实现（T-006）

osi/transport.go

@@ -23,7 +23,6 @@ type TransportConfig struct {
 }
 
 type Transport struct {
-	client  *http.Client
 	timeout time.Duration
 	dialer  proxy.Dialer
 }
@@ -35,19 +34,15 @@ func NewTransport(config TransportConfig) (*Transport, error) {
 	}
 
 	dialer := proxy.Dialer(proxy.Direct)
-	roundTripper := http.DefaultTransport.(*http.Transport).Clone()
 	if strings.TrimSpace(config.Socks5Proxy) != "" {
 		proxyDialer, err := socks5Dialer(config.Socks5Proxy)
 		if err != nil {
 			return nil, err
 		}
 		dialer = proxyDialer
-		roundTripper.DialContext = func(ctx context.Context, network, address string) (net.Conn, error) {
-			return dialWithContext(ctx, proxyDialer, network, address)
-		}
 	}
 
-	return &Transport{client: &http.Client{Timeout: timeout, Transport: roundTripper}, timeout: timeout, dialer: dialer}, nil
+	return &Transport{timeout: timeout, dialer: dialer}, nil
 }
 
 func (t *Transport) PostJSON(ctx context.Context, targetURL string, payload any, headers map[string]string) (int, []byte, error) {
@@ -107,7 +102,7 @@ func writeJSONRequest(w io.Writer, target *url.URL, body []byte, headers map[str
 	fmt.Fprintf(&buf, "POST %s HTTP/1.1\r\n", path)
 	writeHeader(&buf, "Host", target.Host)
 	writeHeader(&buf, "User-Agent", headerValue(headers, "User-Agent", "python-requests/2.32.4"))
-	writeHeader(&buf, "Accept-Encoding", headerValue(headers, "Accept-Encoding", "gzip, deflate, br"))
+	writeHeader(&buf, "Accept-Encoding", headerValue(headers, "Accept-Encoding", "identity"))
 	writeHeader(&buf, "Accept", headerValue(headers, "Accept", "*/*"))
 	writeHeader(&buf, "Connection", headerValue(headers, "Connection", "keep-alive"))
 	writeHeader(&buf, "Content-Length", fmt.Sprintf("%d", len(body)))