fix(net/ghttp): skip common response body in common response handler …

…for streaming content types (gogf#3762)

net/ghttp/ghttp_middleware_handler_response.go

@@ -7,6 +7,7 @@
 package ghttp
 
 import (
+	"mime"
 	"net/http"
 
 	"github.com/gogf/gf/v2/errors/gcode"
@@ -20,6 +21,17 @@ type DefaultHandlerResponse struct {
 	Data    interface{} `json:"data"    dc:"Result data for certain request according API definition"`
 }
 
+const (
+	contentTypeEventStream  = "text/event-stream"
+	contentTypeOctetStream  = "application/octet-stream"
+	contentTypeMixedReplace = "multipart/x-mixed-replace"
+)
+
+var (
+	// streamContentType is the content types for stream response.
+	streamContentType = []string{contentTypeEventStream, contentTypeOctetStream, contentTypeMixedReplace}
+)
+
 // MiddlewareHandlerResponse is the default middleware handling handler response object and its error.
 func MiddlewareHandlerResponse(r *Request) {
 	r.Middleware.Next()
@@ -29,6 +41,14 @@ func MiddlewareHandlerResponse(r *Request) {
 		return
 	}
 
+	// It does not output common response content if it is stream response.
+	mediaType, _, _ := mime.ParseMediaType(r.Response.Header().Get("Content-Type"))
+	for _, ct := range streamContentType {
+		if mediaType == ct {
+			return
+		}
+	}
+
 	var (
 		msg  string
 		err  = r.GetError()

net/ghttp/ghttp_z_unit_feature_middleware_basic_test.go

@@ -772,6 +772,49 @@ func Test_MiddlewareHandlerGzipResponse(t *testing.T) {
 	})
 }
 
+func Test_MiddlewareHandlerStreamResponse(t *testing.T) {
+	s := g.Server(guid.S())
+	s.Group("/", func(group *ghttp.RouterGroup) {
+		group.Middleware(ghttp.MiddlewareHandlerResponse)
+
+		group.GET("/stream/event", func(r *ghttp.Request) {
+			r.Response.Header().Set("Content-Type", "text/event-stream")
+		})
+
+		group.GET("/stream/octet", func(r *ghttp.Request) {
+			r.Response.Header().Set("Content-Type", "application/octet-stream")
+		})
+
+		group.GET("/stream/mixed", func(r *ghttp.Request) {
+			r.Response.Header().Set("Content-Type", "multipart/x-mixed-replace")
+		})
+	})
+	s.SetDumpRouterMap(false)
+	s.Start()
+	defer s.Shutdown()
+	time.Sleep(100 * time.Millisecond)
+
+	gtest.C(t, func(t *gtest.T) {
+		client := g.Client()
+		client.SetPrefix(fmt.Sprintf("http://127.0.0.1:%d", s.GetListenedPort()))
+
+		rsp, err := client.Get(ctx, "/stream/event")
+		t.AssertNil(err)
+		t.Assert(rsp.StatusCode, http.StatusOK)
+		t.Assert(rsp.ReadAllString(), "")
+
+		rsp, err = client.Get(ctx, "/stream/octet")
+		t.AssertNil(err)
+		t.Assert(rsp.StatusCode, http.StatusOK)
+		t.Assert(rsp.ReadAllString(), "")
+
+		rsp, err = client.Get(ctx, "/stream/mixed")
+		t.AssertNil(err)
+		t.Assert(rsp.StatusCode, http.StatusOK)
+		t.Assert(rsp.ReadAllString(), "")
+	})
+}
+
 type testTracerProvider struct{}
 
 var _ trace.TracerProvider = &testTracerProvider{}