fix: reset request after reset user values on keep-alive connections

server.go

@@ -2118,6 +2118,7 @@ func (s *Server) serveConn(c net.Conn) (err error) {
 			br, err = acquireByteReader(&ctx)
 		}
 
+		reqReset = false
 		ctx.Request.isTLS = isTLS
 		ctx.Response.Header.noDefaultContentType = s.NoDefaultContentType
 		ctx.Response.Header.noDefaultDate = s.NoDefaultDate
@@ -2302,8 +2303,6 @@ func (s *Server) serveConn(c net.Conn) (err error) {
 		if !ctx.IsGet() && ctx.IsHead() {
 			ctx.Response.SkipBody = true
 		}
-		reqReset = true
-		ctx.Request.Reset()
 
 		hijackHandler = ctx.hijackHandler
 		ctx.hijackHandler = nil
@@ -2404,6 +2403,9 @@ func (s *Server) serveConn(c net.Conn) (err error) {
 		s.setState(c, StateIdle)
 		ctx.userValues.Reset()
 
+		reqReset = true
+		ctx.Request.Reset()
+
 		if atomic.LoadInt32(&s.stop) == 1 {
 			err = nil
 			break

server_test.go

@@ -25,6 +25,15 @@ import (
 // Make sure RequestCtx implements context.Context
 var _ context.Context = &RequestCtx{}
 
+type closerWithRequestCtx struct {
+	ctx       *RequestCtx
+	closeFunc func(ctx *RequestCtx) error
+}
+
+func (c *closerWithRequestCtx) Close() error {
+	return c.closeFunc(c.ctx)
+}
+
 func TestServerCRNLAfterPost_Pipeline(t *testing.T) {
 	t.Parallel()
 
@@ -2032,6 +2041,43 @@ func TestRequestCtxWriteString(t *testing.T) {
 	}
 }
 
+func TestServeConnKeepRequestValuesUntilResetUserValues(t *testing.T) {
+	t.Parallel()
+
+	reqStr := "POST /foo HTTP/1.0\r\nHost: google.com\r\nContent-Type: application/octet-stream\r\nContent-Length: 0\r\nConnection: keep-alive\r\n\r\n"
+
+	rw := &readWriter{}
+	rw.r.WriteString(reqStr)
+
+	var resultReqStr string
+
+	ch := make(chan struct{})
+	go func() {
+		err := ServeConn(rw, func(ctx *RequestCtx) {
+			ctx.SetUserValue("myKey", &closerWithRequestCtx{
+				ctx: ctx,
+				closeFunc: func(closerCtx *RequestCtx) error {
+					resultReqStr = closerCtx.Request.String()
+					return nil
+				}})
+		})
+		if err != nil {
+			t.Errorf("unexpected error in ServeConn: %s", err)
+		}
+		close(ch)
+	}()
+
+	select {
+	case <-ch:
+	case <-time.After(time.Second):
+		t.Fatal("timeout")
+	}
+
+	if resultReqStr != reqStr {
+		t.Errorf("Request == %s, want %s", resultReqStr, reqStr)
+	}
+}
+
 func TestServeConnNonHTTP11KeepAlive(t *testing.T) {
 	t.Parallel()