Merge a777c1532ae3f45efaaabd7d7b7866a2c294e9f4 into 8659ab573cf7d26b2fa2a41e90075d84606188f1

Makefile

@@ -75,3 +75,11 @@ tools:
 		$(GO) install golang.org/x/lint/golint; \
 		$(GO) install github.com/client9/misspell/cmd/misspell; \
 	fi
+
+.PHONY: buf-lint
+buf-lint:
+	@ buf lint
+
+.PHONY: buf-gen
+buf-gen:
+	@ buf gen

README.md

@@ -1154,10 +1154,9 @@ func main() {
 
   r.GET("/someProtoBuf", func(c *gin.Context) {
     reps := []int64{int64(1), int64(2)}
-    label := "test"
     // The specific definition of protobuf is written in the testdata/protoexample file.
     data := &protoexample.Test{
-      Label: &label,
+      Label: "test",
       Reps:  reps,
     }
     // Note that data becomes binary data in the response
@@ -1165,6 +1164,19 @@ func main() {
     c.ProtoBuf(http.StatusOK, data)
   })
 
+  r.GET("/someProtoJSON", func(c *gin.Context) {
+    reps := []int64{int64(1), int64(2)}
+    // The specific definition of protobuf is written in the testdata/protoexample file.
+    data := &protoexample.Test{
+      Label: "test",
+      Reps:  reps,
+    }
+    // Note that data becomes JSON data in the response
+    // (But under the hood, this calls protojson.Marshal, which is the correct
+    // way to render protos as JSON)
+    c.ProtoJSON(http.StatusOK, data)
+  })
+
   // Listen and serve on 0.0.0.0:8080
   r.Run(":8080")
 }

binding/binding.go

@@ -80,6 +80,7 @@ var (
 	FormPost      = formPostBinding{}
 	FormMultipart = formMultipartBinding{}
 	ProtoBuf      = protobufBinding{}
+	ProtoJSON     = protoJSONBinding{}
 	MsgPack       = msgpackBinding{}
 	YAML          = yamlBinding{}
 	Uri           = uriBinding{}

binding/binding_test.go

@@ -20,6 +20,7 @@ import (
 
 	"github.com/gin-gonic/gin/testdata/protoexample"
 	"github.com/stretchr/testify/assert"
+	"google.golang.org/protobuf/encoding/protojson"
 	"google.golang.org/protobuf/proto"
 )
 
@@ -704,7 +705,7 @@ func TestBindingFormMultipartForMapFail(t *testing.T) {
 
 func TestBindingProtoBuf(t *testing.T) {
 	test := &protoexample.Test{
-		Label: proto.String("yes"),
+		Label: "yes",
 	}
 	data, _ := proto.Marshal(test)
 
@@ -716,7 +717,7 @@ func TestBindingProtoBuf(t *testing.T) {
 
 func TestBindingProtoBufFail(t *testing.T) {
 	test := &protoexample.Test{
-		Label: proto.String("yes"),
+		Label: "yes",
 	}
 	data, _ := proto.Marshal(test)
 
@@ -726,6 +727,18 @@ func TestBindingProtoBufFail(t *testing.T) {
 		string(data), string(data[1:]))
 }
 
+func TestBindingProtoJSON(t *testing.T) {
+	test := &protoexample.Test{
+		Label: "yes",
+	}
+	data, _ := protojson.Marshal(test)
+
+	testProtoJSONBinding(t,
+		ProtoJSON, "protojson",
+		"/", "/",
+		string(data), string(data[1:]))
+}
+
 func TestValidationFails(t *testing.T) {
 	var obj FooStruct
 	req := requestWithBody("POST", "/", `{"bar": "foo"}`)
@@ -1325,7 +1338,7 @@ func testProtoBodyBinding(t *testing.T, b Binding, name, path, badPath, body, ba
 	req.Header.Add("Content-Type", MIMEPROTOBUF)
 	err := b.Bind(req, &obj)
 	assert.NoError(t, err)
-	assert.Equal(t, "yes", *obj.Label)
+	assert.Equal(t, "yes", obj.Label)
 
 	obj = protoexample.Test{}
 	req = requestWithBody("POST", badPath, badBody)
@@ -1334,6 +1347,23 @@ func testProtoBodyBinding(t *testing.T, b Binding, name, path, badPath, body, ba
 	assert.Error(t, err)
 }
 
+func testProtoJSONBinding(t *testing.T, b Binding, name, path, badPath, body, badBody string) {
+	assert.Equal(t, name, b.Name())
+
+	obj := protoexample.Test{}
+	req := requestWithBody("POST", path, body)
+	req.Header.Add("Content-Type", MIMEJSON)
+	err := b.Bind(req, &obj)
+	assert.NoError(t, err)
+	assert.Equal(t, "yes", obj.Label)
+
+	obj = protoexample.Test{}
+	req = requestWithBody("POST", badPath, badBody)
+	req.Header.Add("Content-Type", MIMEJSON)
+	err = ProtoJSON.Bind(req, &obj)
+	assert.Error(t, err)
+}
+
 type hook struct{}
 
 func (h hook) Read([]byte) (int, error) {

binding/protobuf.go

@@ -37,5 +37,4 @@ func (protobufBinding) BindBody(body []byte, obj any) error {
 	// Here it's same to return validate(obj), but util now we can't add
 	// `binding:""` to the struct which automatically generate by gen-proto
 	return nil
-	// return validate(obj)
 }

binding/protojson.go

@@ -0,0 +1,41 @@
+// Copyright 2014 Manu Martinez-Almeida. All rights reserved.
+// Use of this source code is governed by a MIT style
+// license that can be found in the LICENSE file.
+
+package binding
+
+import (
+	"errors"
+	"io/ioutil"
+	"net/http"
+
+	"google.golang.org/protobuf/encoding/protojson"
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+type protoJSONBinding struct{}
+
+func (protoJSONBinding) Name() string {
+	return "protojson"
+}
+
+func (b protoJSONBinding) Bind(req *http.Request, obj any) error {
+	buf, err := ioutil.ReadAll(req.Body)
+	if err != nil {
+		return err
+	}
+	return b.BindBody(buf, obj)
+}
+
+func (protoJSONBinding) BindBody(body []byte, obj any) error {
+	msg, ok := obj.(protoreflect.ProtoMessage)
+	if !ok {
+		return errors.New("obj is not ProtoMessage")
+	}
+	if err := protojson.Unmarshal(body, msg); err != nil {
+		return err
+	}
+	// Here it's same to return validate(obj), but util now we can't add
+	// `binding:""` to the struct which automatically generate by gen-proto
+	return nil
+}

buf.gen.yaml

@@ -0,0 +1,6 @@
+version: v1
+plugins:
+  - name: go
+    out: testdata
+    path: protoc-gen-go
+    opt: paths=source_relative

buf.work.yaml

@@ -0,0 +1,4 @@
+---
+version: v1
+directories:
+  - testdata

context.go

@@ -636,6 +636,11 @@ func (c *Context) BindJSON(obj any) error {
 	return c.MustBindWith(obj, binding.JSON)
 }
 
+// BindProtoJSON is a shortcut for c.MustBindWith(obj, binding.ProtoJSON).
+func (c *Context) BindProtoJSON(obj any) error {
+	return c.MustBindWith(obj, binding.ProtoJSON)
+}
+
 // BindXML is a shortcut for c.MustBindWith(obj, binding.BindXML).
 func (c *Context) BindXML(obj any) error {
 	return c.MustBindWith(obj, binding.XML)
@@ -701,6 +706,11 @@ func (c *Context) ShouldBindJSON(obj any) error {
 	return c.ShouldBindWith(obj, binding.JSON)
 }
 
+// ShouldBindProtoJSON is a shortcut for c.ShouldBindWith(obj, binding.ProtoJSON).
+func (c *Context) ShouldBindProtoJSON(obj any) error {
+	return c.ShouldBindWith(obj, binding.ProtoJSON)
+}
+
 // ShouldBindXML is a shortcut for c.ShouldBindWith(obj, binding.XML).
 func (c *Context) ShouldBindXML(obj any) error {
 	return c.ShouldBindWith(obj, binding.XML)
@@ -969,6 +979,12 @@ func (c *Context) JSON(code int, obj any) {
 	c.Render(code, render.JSON{Data: obj})
 }
 
+// ProtoJSON serializes the given protomessage as JSON into the response body.
+// It also sets the Content-Type as "application/json".
+func (c *Context) ProtoJSON(code int, obj any) {
+	c.Render(code, render.ProtoJSON{Data: obj})
+}
+
 // AsciiJSON serializes the given struct as JSON into the response body with unicode to ASCII string.
 // It also sets the Content-Type as "application/json".
 func (c *Context) AsciiJSON(code int, obj any) {

context_test.go

@@ -678,6 +678,23 @@ func TestContextRenderJSON(t *testing.T) {
 	assert.Equal(t, "application/json; charset=utf-8", w.Header().Get("Content-Type"))
 }
 
+// Tests that the response is serialized as JSON
+// and Content-Type is set to application/json
+// and special HTML characters are escaped
+func TestContextRenderProtoJSON(t *testing.T) {
+	w := httptest.NewRecorder()
+	c, _ := CreateTestContext(w)
+
+	c.ProtoJSON(http.StatusCreated, &testdata.Test{
+		Label:         "yes!",
+		OptionalField: proto.String("ahah"),
+	})
+
+	assert.Equal(t, http.StatusCreated, w.Code)
+	assert.Equal(t, "{\"label\":\"yes!\", \"optionalField\":\"ahah\"}", w.Body.String())
+	assert.Equal(t, "application/json; charset=utf-8", w.Header().Get("Content-Type"))
+}
+
 // Tests that the response is serialized as JSONP
 // and Content-Type is set to application/javascript
 func TestContextRenderJSONP(t *testing.T) {
@@ -1081,9 +1098,8 @@ func TestContextRenderProtoBuf(t *testing.T) {
 	c, _ := CreateTestContext(w)
 
 	reps := []int64{int64(1), int64(2)}
-	label := "test"
 	data := &testdata.Test{
-		Label: &label,
+		Label: "test",
 		Reps:  reps,
 	}
 
@@ -1607,6 +1623,20 @@ func TestContextBindWithJSON(t *testing.T) {
 	assert.Equal(t, 0, w.Body.Len())
 }
 
+func TestContextBindWithProtoJSON(t *testing.T) {
+	w := httptest.NewRecorder()
+	c, _ := CreateTestContext(w)
+
+	c.Request, _ = http.NewRequest("POST", "/", bytes.NewBufferString("{\"label\":\"bar\",\"optionalField\":\"foo\"}"))
+	c.Request.Header.Add("Content-Type", MIMEJSON)
+
+	var obj testdata.Test
+	assert.NoError(t, c.BindProtoJSON(&obj))
+	assert.Equal(t, "bar", obj.Label)
+	assert.Equal(t, "foo", *obj.OptionalField)
+	assert.Equal(t, 0, w.Body.Len())
+}
+
 func TestContextBindWithXML(t *testing.T) {
 	w := httptest.NewRecorder()
 	c, _ := CreateTestContext(w)
@@ -1753,6 +1783,20 @@ func TestContextShouldBindWithJSON(t *testing.T) {
 	assert.Equal(t, 0, w.Body.Len())
 }
 
+func TestContextShouldBindWithProtoJSON(t *testing.T) {
+	w := httptest.NewRecorder()
+	c, _ := CreateTestContext(w)
+
+	c.Request, _ = http.NewRequest("POST", "/", bytes.NewBufferString("{\"label\":\"bar\", \"optionalField\":\"foo\"}"))
+	c.Request.Header.Add("Content-Type", MIMEJSON) // set fake content-type
+
+	var obj testdata.Test
+	assert.NoError(t, c.ShouldBindProtoJSON(&obj))
+	assert.Equal(t, "bar", obj.Label)
+	assert.Equal(t, "foo", *obj.OptionalField)
+	assert.Equal(t, 0, w.Body.Len())
+}
+
 func TestContextShouldBindWithXML(t *testing.T) {
 	w := httptest.NewRecorder()
 	c, _ := CreateTestContext(w)

render/protojson.go

@@ -0,0 +1,36 @@
+// Copyright 2022 Gin Core Team. All rights reserved.
+// Use of this source code is governed by a MIT style
+// license that can be found in the LICENSE file.
+
+package render
+
+import (
+	"net/http"
+
+	"google.golang.org/protobuf/encoding/protojson"
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+// ProtoJSON contains the given interface object.
+type ProtoJSON struct {
+	Data any
+}
+
+// Render (ProtoJSON) marshals the given interface object and
+// writes data with custom ContentType.
+func (r ProtoJSON) Render(w http.ResponseWriter) error {
+	r.WriteContentType(w)
+
+	bytes, err := protojson.Marshal(r.Data.(protoreflect.ProtoMessage))
+	if err != nil {
+		return err
+	}
+
+	_, err = w.Write(bytes)
+	return err
+}
+
+// WriteContentType (ProtoBuf) writes ProtoBuf ContentType.
+func (r ProtoJSON) WriteContentType(w http.ResponseWriter) {
+	writeContentType(w, jsonContentType)
+}

render/render.go

@@ -30,6 +30,7 @@ var (
 	_ Render     = Reader{}
 	_ Render     = AsciiJSON{}
 	_ Render     = ProtoBuf{}
+	_ Render     = ProtoJSON{}
 	_ Render     = TOML{}
 )
 

render/render_test.go

@@ -17,6 +17,7 @@ import (
 
 	testdata "github.com/gin-gonic/gin/testdata/protoexample"
 	"github.com/stretchr/testify/assert"
+	"google.golang.org/protobuf/encoding/protojson"
 	"google.golang.org/protobuf/proto"
 )
 
@@ -280,9 +281,8 @@ func TestRenderTOMLFail(t *testing.T) {
 func TestRenderProtoBuf(t *testing.T) {
 	w := httptest.NewRecorder()
 	reps := []int64{int64(1), int64(2)}
-	label := "test"
 	data := &testdata.Test{
-		Label: &label,
+		Label: "test",
 		Reps:  reps,
 	}
 
@@ -305,6 +305,33 @@ func TestRenderProtoBufFail(t *testing.T) {
 	assert.Error(t, err)
 }
 
+func TestRenderProtoJSON(t *testing.T) {
+	w := httptest.NewRecorder()
+	reps := []int64{int64(1), int64(2)}
+	data := &testdata.Test{
+		Label: "test",
+		Reps:  reps,
+	}
+
+	(ProtoJSON{data}).WriteContentType(w)
+	protoData, err := protojson.Marshal(data)
+	assert.NoError(t, err)
+	assert.Equal(t, "application/json; charset=utf-8", w.Header().Get("Content-Type"))
+
+	err = (ProtoJSON{data}).Render(w)
+
+	assert.NoError(t, err)
+	assert.Equal(t, string(protoData), w.Body.String())
+	assert.Equal(t, "application/json; charset=utf-8", w.Header().Get("Content-Type"))
+}
+
+func TestRenderProtoJSONFail(t *testing.T) {
+	w := httptest.NewRecorder()
+	data := &testdata.Test{}
+	err := (ProtoJSON{data}).Render(w)
+	assert.Error(t, err)
+}
+
 func TestRenderXML(t *testing.T) {
 	w := httptest.NewRecorder()
 	data := xmlmap{

testdata/buf.yaml

@@ -0,0 +1,10 @@
+version: v1
+lint:
+  use:
+    - DEFAULT
+  except:
+    # `Package name "ptypes" should be suffixed with a correctly formed version, such as "ptypes.v1".`
+    - PACKAGE_VERSION_SUFFIX
+breaking:
+  use:
+    - FILE

testdata/protoexample/test.pb.go

@@ -1,8 +1,8 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.27.0
-// 	protoc        v3.15.8
-// source: test.proto
+// 	protoc-gen-go v1.28.1
+// 	protoc        (unknown)
+// source: protoexample/test.proto
 
 package protoexample
 
@@ -23,16 +23,25 @@ const (
 type FOO int32
 
 const (
-	FOO_X FOO = 17
+	FOO_FOO_UNSPECIFIED FOO = 0
+	FOO_FOO_A           FOO = 1
+	FOO_FOO_B           FOO = 2
+	FOO_FOO_C           FOO = 3
 )
 
 // Enum value maps for FOO.
 var (
 	FOO_name = map[int32]string{
-		17: "X",
+		0: "FOO_UNSPECIFIED",
+		1: "FOO_A",
+		2: "FOO_B",
+		3: "FOO_C",
 	}
 	FOO_value = map[string]int32{
-		"X": 17,
+		"FOO_UNSPECIFIED": 0,
+		"FOO_A":           1,
+		"FOO_B":           2,
+		"FOO_C":           3,
 	}
 )
 
@@ -47,30 +56,20 @@ func (x FOO) String() string {
 }
 
 func (FOO) Descriptor() protoreflect.EnumDescriptor {
-	return file_test_proto_enumTypes[0].Descriptor()
+	return file_protoexample_test_proto_enumTypes[0].Descriptor()
 }
 
 func (FOO) Type() protoreflect.EnumType {
-	return &file_test_proto_enumTypes[0]
+	return &file_protoexample_test_proto_enumTypes[0]
 }
 
 func (x FOO) Number() protoreflect.EnumNumber {
 	return protoreflect.EnumNumber(x)
 }
 
-// Deprecated: Do not use.
-func (x *FOO) UnmarshalJSON(b []byte) error {
-	num, err := protoimpl.X.UnmarshalJSONEnum(x.Descriptor(), b)
-	if err != nil {
-		return err
-	}
-	*x = FOO(num)
-	return nil
-}
-
 // Deprecated: Use FOO.Descriptor instead.
 func (FOO) EnumDescriptor() ([]byte, []int) {
-	return file_test_proto_rawDescGZIP(), []int{0}
+	return file_protoexample_test_proto_rawDescGZIP(), []int{0}
 }
 
 type Test struct {
@@ -78,21 +77,16 @@ type Test struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Label         *string             `protobuf:"bytes,1,req,name=label" json:"label,omitempty"`
-	Type          *int32              `protobuf:"varint,2,opt,name=type,def=77" json:"type,omitempty"`
-	Reps          []int64             `protobuf:"varint,3,rep,name=reps" json:"reps,omitempty"`
-	Optionalgroup *Test_OptionalGroup `protobuf:"group,4,opt,name=OptionalGroup,json=optionalgroup" json:"optionalgroup,omitempty"`
+	Label         string  `protobuf:"bytes,1,opt,name=label,proto3" json:"label,omitempty"`
+	Type          *int32  `protobuf:"varint,2,opt,name=type,proto3,oneof" json:"type,omitempty"`
+	Reps          []int64 `protobuf:"varint,3,rep,packed,name=reps,proto3" json:"reps,omitempty"`
+	OptionalField *string `protobuf:"bytes,4,opt,name=optional_field,json=optionalField,proto3,oneof" json:"optional_field,omitempty"`
 }
 
-// Default values for Test fields.
-const (
-	Default_Test_Type = int32(77)
-)
-
 func (x *Test) Reset() {
 	*x = Test{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_test_proto_msgTypes[0]
+		mi := &file_protoexample_test_proto_msgTypes[0]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -105,7 +99,7 @@ func (x *Test) String() string {
 func (*Test) ProtoMessage() {}
 
 func (x *Test) ProtoReflect() protoreflect.Message {
-	mi := &file_test_proto_msgTypes[0]
+	mi := &file_protoexample_test_proto_msgTypes[0]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -118,12 +112,12 @@ func (x *Test) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Test.ProtoReflect.Descriptor instead.
 func (*Test) Descriptor() ([]byte, []int) {
-	return file_test_proto_rawDescGZIP(), []int{0}
+	return file_protoexample_test_proto_rawDescGZIP(), []int{0}
 }
 
 func (x *Test) GetLabel() string {
-	if x != nil && x.Label != nil {
-		return *x.Label
+	if x != nil {
+		return x.Label
 	}
 	return ""
 }
@@ -132,7 +126,7 @@ func (x *Test) GetType() int32 {
 	if x != nil && x.Type != nil {
 		return *x.Type
 	}
-	return Default_Test_Type
+	return 0
 }
 
 func (x *Test) GetReps() []int64 {
@@ -142,116 +136,71 @@ func (x *Test) GetReps() []int64 {
 	return nil
 }
 
-func (x *Test) GetOptionalgroup() *Test_OptionalGroup {
-	if x != nil {
-		return x.Optionalgroup
-	}
-	return nil
-}
-
-type Test_OptionalGroup struct {
-	state         protoimpl.MessageState
-	sizeCache     protoimpl.SizeCache
-	unknownFields protoimpl.UnknownFields
-
-	RequiredField *string `protobuf:"bytes,5,req,name=RequiredField" json:"RequiredField,omitempty"`
-}
-
-func (x *Test_OptionalGroup) Reset() {
-	*x = Test_OptionalGroup{}
-	if protoimpl.UnsafeEnabled {
-		mi := &file_test_proto_msgTypes[1]
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		ms.StoreMessageInfo(mi)
-	}
-}
-
-func (x *Test_OptionalGroup) String() string {
-	return protoimpl.X.MessageStringOf(x)
-}
-
-func (*Test_OptionalGroup) ProtoMessage() {}
-
-func (x *Test_OptionalGroup) ProtoReflect() protoreflect.Message {
-	mi := &file_test_proto_msgTypes[1]
-	if protoimpl.UnsafeEnabled && x != nil {
-		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
-		if ms.LoadMessageInfo() == nil {
-			ms.StoreMessageInfo(mi)
-		}
-		return ms
-	}
-	return mi.MessageOf(x)
-}
-
-// Deprecated: Use Test_OptionalGroup.ProtoReflect.Descriptor instead.
-func (*Test_OptionalGroup) Descriptor() ([]byte, []int) {
-	return file_test_proto_rawDescGZIP(), []int{0, 0}
-}
-
-func (x *Test_OptionalGroup) GetRequiredField() string {
-	if x != nil && x.RequiredField != nil {
-		return *x.RequiredField
+func (x *Test) GetOptionalField() string {
+	if x != nil && x.OptionalField != nil {
+		return *x.OptionalField
 	}
 	return ""
 }
 
-var File_test_proto protoreflect.FileDescriptor
+var File_protoexample_test_proto protoreflect.FileDescriptor
 
-var file_test_proto_rawDesc = []byte{
-	0x0a, 0x0a, 0x74, 0x65, 0x73, 0x74, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x0c, 0x70, 0x72,
-	0x6f, 0x74, 0x6f, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x22, 0xc7, 0x01, 0x0a, 0x04, 0x54,
-	0x65, 0x73, 0x74, 0x12, 0x14, 0x0a, 0x05, 0x6c, 0x61, 0x62, 0x65, 0x6c, 0x18, 0x01, 0x20, 0x02,
-	0x28, 0x09, 0x52, 0x05, 0x6c, 0x61, 0x62, 0x65, 0x6c, 0x12, 0x16, 0x0a, 0x04, 0x74, 0x79, 0x70,
-	0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x05, 0x3a, 0x02, 0x37, 0x37, 0x52, 0x04, 0x74, 0x79, 0x70,
-	0x65, 0x12, 0x12, 0x0a, 0x04, 0x72, 0x65, 0x70, 0x73, 0x18, 0x03, 0x20, 0x03, 0x28, 0x03, 0x52,
-	0x04, 0x72, 0x65, 0x70, 0x73, 0x12, 0x46, 0x0a, 0x0d, 0x6f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x61,
-	0x6c, 0x67, 0x72, 0x6f, 0x75, 0x70, 0x18, 0x04, 0x20, 0x01, 0x28, 0x0a, 0x32, 0x20, 0x2e, 0x70,
-	0x72, 0x6f, 0x74, 0x6f, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x2e, 0x54, 0x65, 0x73, 0x74,
-	0x2e, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x61, 0x6c, 0x47, 0x72, 0x6f, 0x75, 0x70, 0x52, 0x0d,
-	0x6f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x61, 0x6c, 0x67, 0x72, 0x6f, 0x75, 0x70, 0x1a, 0x35, 0x0a,
-	0x0d, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x61, 0x6c, 0x47, 0x72, 0x6f, 0x75, 0x70, 0x12, 0x24,
-	0x0a, 0x0d, 0x52, 0x65, 0x71, 0x75, 0x69, 0x72, 0x65, 0x64, 0x46, 0x69, 0x65, 0x6c, 0x64, 0x18,
-	0x05, 0x20, 0x02, 0x28, 0x09, 0x52, 0x0d, 0x52, 0x65, 0x71, 0x75, 0x69, 0x72, 0x65, 0x64, 0x46,
-	0x69, 0x65, 0x6c, 0x64, 0x2a, 0x0c, 0x0a, 0x03, 0x46, 0x4f, 0x4f, 0x12, 0x05, 0x0a, 0x01, 0x58,
-	0x10, 0x11,
+var file_protoexample_test_proto_rawDesc = []byte{
+	0x0a, 0x17, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x2f, 0x74,
+	0x65, 0x73, 0x74, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x0c, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+	0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x22, 0x91, 0x01, 0x0a, 0x04, 0x54, 0x65, 0x73, 0x74,
+	0x12, 0x14, 0x0a, 0x05, 0x6c, 0x61, 0x62, 0x65, 0x6c, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52,
+	0x05, 0x6c, 0x61, 0x62, 0x65, 0x6c, 0x12, 0x17, 0x0a, 0x04, 0x74, 0x79, 0x70, 0x65, 0x18, 0x02,
+	0x20, 0x01, 0x28, 0x05, 0x48, 0x00, 0x52, 0x04, 0x74, 0x79, 0x70, 0x65, 0x88, 0x01, 0x01, 0x12,
+	0x12, 0x0a, 0x04, 0x72, 0x65, 0x70, 0x73, 0x18, 0x03, 0x20, 0x03, 0x28, 0x03, 0x52, 0x04, 0x72,
+	0x65, 0x70, 0x73, 0x12, 0x2a, 0x0a, 0x0e, 0x6f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x61, 0x6c, 0x5f,
+	0x66, 0x69, 0x65, 0x6c, 0x64, 0x18, 0x04, 0x20, 0x01, 0x28, 0x09, 0x48, 0x01, 0x52, 0x0d, 0x6f,
+	0x70, 0x74, 0x69, 0x6f, 0x6e, 0x61, 0x6c, 0x46, 0x69, 0x65, 0x6c, 0x64, 0x88, 0x01, 0x01, 0x42,
+	0x07, 0x0a, 0x05, 0x5f, 0x74, 0x79, 0x70, 0x65, 0x42, 0x11, 0x0a, 0x0f, 0x5f, 0x6f, 0x70, 0x74,
+	0x69, 0x6f, 0x6e, 0x61, 0x6c, 0x5f, 0x66, 0x69, 0x65, 0x6c, 0x64, 0x2a, 0x3b, 0x0a, 0x03, 0x46,
+	0x4f, 0x4f, 0x12, 0x13, 0x0a, 0x0f, 0x46, 0x4f, 0x4f, 0x5f, 0x55, 0x4e, 0x53, 0x50, 0x45, 0x43,
+	0x49, 0x46, 0x49, 0x45, 0x44, 0x10, 0x00, 0x12, 0x09, 0x0a, 0x05, 0x46, 0x4f, 0x4f, 0x5f, 0x41,
+	0x10, 0x01, 0x12, 0x09, 0x0a, 0x05, 0x46, 0x4f, 0x4f, 0x5f, 0x42, 0x10, 0x02, 0x12, 0x09, 0x0a,
+	0x05, 0x46, 0x4f, 0x4f, 0x5f, 0x43, 0x10, 0x03, 0x42, 0x3d, 0x5a, 0x3b, 0x67, 0x69, 0x74, 0x68,
+	0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x67, 0x69, 0x6e, 0x2d, 0x67, 0x6f, 0x6e, 0x69, 0x63,
+	0x2f, 0x67, 0x69, 0x6e, 0x2f, 0x74, 0x65, 0x73, 0x74, 0x64, 0x61, 0x74, 0x61, 0x2f, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x3b, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+	0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
-	file_test_proto_rawDescOnce sync.Once
-	file_test_proto_rawDescData = file_test_proto_rawDesc
+	file_protoexample_test_proto_rawDescOnce sync.Once
+	file_protoexample_test_proto_rawDescData = file_protoexample_test_proto_rawDesc
 )
 
-func file_test_proto_rawDescGZIP() []byte {
-	file_test_proto_rawDescOnce.Do(func() {
-		file_test_proto_rawDescData = protoimpl.X.CompressGZIP(file_test_proto_rawDescData)
+func file_protoexample_test_proto_rawDescGZIP() []byte {
+	file_protoexample_test_proto_rawDescOnce.Do(func() {
+		file_protoexample_test_proto_rawDescData = protoimpl.X.CompressGZIP(file_protoexample_test_proto_rawDescData)
 	})
-	return file_test_proto_rawDescData
+	return file_protoexample_test_proto_rawDescData
 }
 
-var file_test_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
-var file_test_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
-var file_test_proto_goTypes = []any{
-	(FOO)(0),                   // 0: protoexample.FOO
-	(*Test)(nil),               // 1: protoexample.Test
-	(*Test_OptionalGroup)(nil), // 2: protoexample.Test.OptionalGroup
+var file_protoexample_test_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
+var file_protoexample_test_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_protoexample_test_proto_goTypes = []interface{}{
+	(FOO)(0),     // 0: protoexample.FOO
+	(*Test)(nil), // 1: protoexample.Test
 }
-var file_test_proto_depIdxs = []int32{
-	2, // 0: protoexample.Test.optionalgroup:type_name -> protoexample.Test.OptionalGroup
-	1, // [1:1] is the sub-list for method output_type
-	1, // [1:1] is the sub-list for method input_type
-	1, // [1:1] is the sub-list for extension type_name
-	1, // [1:1] is the sub-list for extension extendee
-	0, // [0:1] is the sub-list for field type_name
+var file_protoexample_test_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
 }
 
-func init() { file_test_proto_init() }
-func file_test_proto_init() {
-	if File_test_proto != nil {
+func init() { file_protoexample_test_proto_init() }
+func file_protoexample_test_proto_init() {
+	if File_protoexample_test_proto != nil {
 		return
 	}
 	if !protoimpl.UnsafeEnabled {
-		file_test_proto_msgTypes[0].Exporter = func(v any, i int) any {
+		file_protoexample_test_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*Test); i {
 			case 0:
 				return &v.state
@@ -263,36 +212,25 @@ func file_test_proto_init() {
 				return nil
 			}
 		}
-		file_test_proto_msgTypes[1].Exporter = func(v any, i int) any {
-			switch v := v.(*Test_OptionalGroup); i {
-			case 0:
-				return &v.state
-			case 1:
-				return &v.sizeCache
-			case 2:
-				return &v.unknownFields
-			default:
-				return nil
-			}
-		}
 	}
+	file_protoexample_test_proto_msgTypes[0].OneofWrappers = []interface{}{}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
-			RawDescriptor: file_test_proto_rawDesc,
+			RawDescriptor: file_protoexample_test_proto_rawDesc,
 			NumEnums:      1,
-			NumMessages:   2,
+			NumMessages:   1,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
-		GoTypes:           file_test_proto_goTypes,
-		DependencyIndexes: file_test_proto_depIdxs,
-		EnumInfos:         file_test_proto_enumTypes,
-		MessageInfos:      file_test_proto_msgTypes,
+		GoTypes:           file_protoexample_test_proto_goTypes,
+		DependencyIndexes: file_protoexample_test_proto_depIdxs,
+		EnumInfos:         file_protoexample_test_proto_enumTypes,
+		MessageInfos:      file_protoexample_test_proto_msgTypes,
 	}.Build()
-	File_test_proto = out.File
-	file_test_proto_rawDesc = nil
-	file_test_proto_goTypes = nil
-	file_test_proto_depIdxs = nil
+	File_protoexample_test_proto = out.File
+	file_protoexample_test_proto_rawDesc = nil
+	file_protoexample_test_proto_goTypes = nil
+	file_protoexample_test_proto_depIdxs = nil
 }

testdata/protoexample/test.proto

@@ -1,12 +1,19 @@
+syntax = "proto3";
+
 package protoexample;
 
-enum FOO {X=17;};
+option go_package="github.com/gin-gonic/gin/testdata/protoexample;protoexample";
+
+enum FOO {
+  FOO_UNSPECIFIED = 0;
+  FOO_A = 1;
+  FOO_B = 2;
+  FOO_C = 3;
+};
 
 message Test {
-   required string label = 1;
-   optional int32 type = 2[default=77];
-   repeated int64 reps = 3;
-   optional group OptionalGroup = 4{
-     required string RequiredField = 5;
-   }
+  string label = 1;
+  optional int32 type = 2;
+  repeated int64 reps = 3;
+  optional string optional_field = 4;
 }