Update.

pkg/utils/request_wrapper.go

@@ -0,0 +1,56 @@
+package utils
+
+import (
+	"bytes"
+	"io"
+	"net"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+var _ io.ReadWriteCloser = &RequestWrapper{}
+
+type RequestWrapper struct {
+	req    *http.Request
+	reader *bytes.Buffer
+	writer net.Conn
+}
+
+func NewRequestWrapper(req *http.Request, writer gin.ResponseWriter) (*RequestWrapper, error) {
+	conn, _, err := writer.Hijack()
+	if err != nil {
+		return nil, err
+	}
+	buf := bytes.NewBuffer(nil)
+	if err = req.Write(buf); err != nil {
+		return nil, err
+	}
+	return &RequestWrapper{
+		req:    req,
+		reader: buf,
+		writer: conn,
+	}, nil
+}
+
+func (rw *RequestWrapper) Read(p []byte) (int, error) {
+	count, err := rw.reader.Read(p)
+	if err == nil {
+		return count, nil
+	}
+	if err != io.EOF {
+		return count, err
+	}
+	// request 数据读完之后等待客户端断开连接或 grpc 超时
+	return rw.writer.Read(p)
+}
+
+func (rw *RequestWrapper) Write(p []byte) (int, error) {
+	return rw.writer.Write(p)
+}
+
+func (rw *RequestWrapper) Close() error {
+	rw.req.Body.Close()
+	rw.writer.Close()
+	return nil
+}