[Upstream] 解决OpenAI的http2问题

relay/adaptor/common.go

@@ -1,13 +1,17 @@
 package adaptor
 
 import (
+	"bytes"
+	"context"
 	"errors"
 	"fmt"
+	"io"
+	"net/http"
+	"strings"
+
 	"github.com/gin-gonic/gin"
 	"github.com/songquanpeng/one-api/common/client"
 	"github.com/songquanpeng/one-api/relay/meta"
-	"io"
-	"net/http"
 )
 
 func SetupCommonRequestHeader(c *gin.Context, req *http.Request, meta *meta.Meta) {
@@ -18,12 +22,32 @@ func SetupCommonRequestHeader(c *gin.Context, req *http.Request, meta *meta.Meta
 	}
 }
 
+func NewReusableRequest(ctx context.Context, method, url string, body io.Reader) (*http.Request, error) {
+	switch v := body.(type) {
+	case *bytes.Buffer, *bytes.Reader, *strings.Reader:
+		return http.NewRequestWithContext(ctx, method, url, v) // 标准库会自动填 GetBody
+	default:
+		data, err := io.ReadAll(body)
+		if err != nil {
+			return nil, err
+		}
+		req, err := http.NewRequestWithContext(ctx, method, url, bytes.NewReader(data))
+		if err != nil {
+			return nil, err
+		}
+		req.GetBody = func() (io.ReadCloser, error) {
+			return io.NopCloser(bytes.NewReader(data)), nil
+		}
+		return req, nil
+	}
+}
+
 func DoRequestHelper(a Adaptor, c *gin.Context, meta *meta.Meta, requestBody io.Reader) (*http.Response, error) {
 	fullRequestURL, err := a.GetRequestURL(meta)
 	if err != nil {
 		return nil, fmt.Errorf("get request url failed: %w", err)
 	}
-	req, err := http.NewRequest(c.Request.Method, fullRequestURL, requestBody)
+	req, err := NewReusableRequest(c.Request.Context(), c.Request.Method, fullRequestURL, requestBody)
 	if err != nil {
 		return nil, fmt.Errorf("new request failed: %w", err)
 	}