fix #1665

_examples/README.md

@@ -251,6 +251,7 @@
     * [Websocket Controller](mvc/websocket)
     * [Register Middleware](mvc/middleware)
     * [gRPC](mvc/grpc-compatible)
+    * [gRPC Bidirectional Stream](mvc/grpc-compatible-bidirectional-stream)
     * [Login (Repository and Service layers)](mvc/login)
     * [Login (Single Responsibility)](mvc/login-mvc-single-responsibility)
     * [Vue.js Todo App](mvc/vuejs-todo-mvc)

_examples/mvc/grpc-compatible-bidirectional-stream/client/main.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"context"
+	"time"
+
+	pb "grpcexample/helloworld"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+)
+
+func main() {
+	// Set up a connection to the server.
+	cred, err := credentials.NewClientTLSFromFile("../server.crt", "localhost")
+	if err != nil {
+		panic(err)
+	}
+
+	conn, err := grpc.Dial("localhost:443", grpc.WithTransportCredentials(cred), grpc.WithBlock())
+	defer conn.Close()
+
+	client := pb.NewGreeterBidirectionalStreamClient(conn)
+	stream, err := client.SayHello(context.Background())
+	if err != nil {
+		panic(err)
+	}
+
+	waitCh := make(chan struct{})
+
+	// Implement the send channel.
+	// As an exercise you can implement the read channel one (reading from server, see the server/main.go).
+	go func() {
+		for {
+			println("Sleeping for 2 seconds...")
+			time.Sleep(2 * time.Second)
+			println("Sending a <test> msg...")
+			msg := &pb.HelloRequest{Name: "test"}
+
+			err = stream.Send(msg)
+			if err != nil {
+				panic("stream.Send: " + err.Error())
+			}
+		}
+	}()
+
+	<-waitCh
+	stream.CloseSend()
+}

_examples/mvc/grpc-compatible-bidirectional-stream/go.mod

@@ -0,0 +1,12 @@
+module grpcexample
+
+go 1.15
+
+// replace github.com/kataras/iris/v12 => ../../../
+
+require (
+	github.com/golang/protobuf v1.4.2
+	github.com/kataras/iris/v12 master
+	google.golang.org/grpc v1.33.1
+	google.golang.org/protobuf v1.25.0
+)

_examples/mvc/grpc-compatible-bidirectional-stream/helloworld.proto

@@ -0,0 +1,39 @@
+syntax = "proto3";
+
+package helloworld;
+
+option go_package = ".;helloworld";
+
+// The request message containing the user's name.
+message HelloRequest {
+  string name = 1;
+}
+
+// The response message containing the greetings
+message HelloReply {
+  string message = 1;
+}
+
+// The greeting service definition.
+service Greeter {
+  // Sends a greeting
+  rpc SayHello (HelloRequest) returns (HelloReply) {}
+}
+
+// The greeting service definition. (Server-side streaming RPC)
+service GreeterServerSideSStream {
+  // Sends a greeting
+  rpc SayHello (HelloRequest) returns (stream HelloReply) {}
+}
+
+// The greeting service definition. (Client-side streaming RPC)
+service GreeterClientSideStream {
+  // Sends a greeting
+  rpc SayHello (stream HelloRequest) returns (HelloReply) {}
+}
+
+// The greeting service definition. (Bidirectional streaming RPC)
+service GreeterBidirectionalStream {
+  // Sends a greeting
+  rpc SayHello (stream HelloRequest) returns (stream HelloReply) {}
+}

_examples/mvc/grpc-compatible-bidirectional-stream/helloworld/helloworld.pb.go

@@ -0,0 +1,242 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.25.0
+// 	protoc        v3.12.3
+// source: helloworld.proto
+
+package helloworld
+
+import (
+	proto "github.com/golang/protobuf/proto"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// This is a compile-time assertion that a sufficiently up-to-date version
+// of the legacy proto package is being used.
+const _ = proto.ProtoPackageIsVersion4
+
+// The request message containing the user's name.
+type HelloRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+}
+
+func (x *HelloRequest) Reset() {
+	*x = HelloRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_helloworld_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *HelloRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*HelloRequest) ProtoMessage() {}
+
+func (x *HelloRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_helloworld_proto_msgTypes[0]
+	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 HelloRequest.ProtoReflect.Descriptor instead.
+func (*HelloRequest) Descriptor() ([]byte, []int) {
+	return file_helloworld_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *HelloRequest) GetName() string {
+	if x != nil {
+		return x.Name
+	}
+	return ""
+}
+
+// The response message containing the greetings
+type HelloReply struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Message string `protobuf:"bytes,1,opt,name=message,proto3" json:"message,omitempty"`
+}
+
+func (x *HelloReply) Reset() {
+	*x = HelloReply{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_helloworld_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *HelloReply) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*HelloReply) ProtoMessage() {}
+
+func (x *HelloReply) ProtoReflect() protoreflect.Message {
+	mi := &file_helloworld_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 HelloReply.ProtoReflect.Descriptor instead.
+func (*HelloReply) Descriptor() ([]byte, []int) {
+	return file_helloworld_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *HelloReply) GetMessage() string {
+	if x != nil {
+		return x.Message
+	}
+	return ""
+}
+
+var File_helloworld_proto protoreflect.FileDescriptor
+
+var file_helloworld_proto_rawDesc = []byte{
+	0x0a, 0x10, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x77, 0x6f, 0x72, 0x6c, 0x64, 0x2e, 0x70, 0x72, 0x6f,
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+	0x75, 0x65, 0x73, 0x74, 0x1a, 0x16, 0x2e, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x77, 0x6f, 0x72, 0x6c,
+	0x64, 0x2e, 0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x52, 0x65, 0x70, 0x6c, 0x79, 0x22, 0x00, 0x28, 0x01,
+	0x30, 0x01, 0x42, 0x0e, 0x5a, 0x0c, 0x2e, 0x3b, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x77, 0x6f, 0x72,
+	0x6c, 0x64, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_helloworld_proto_rawDescOnce sync.Once
+	file_helloworld_proto_rawDescData = file_helloworld_proto_rawDesc
+)
+
+func file_helloworld_proto_rawDescGZIP() []byte {
+	file_helloworld_proto_rawDescOnce.Do(func() {
+		file_helloworld_proto_rawDescData = protoimpl.X.CompressGZIP(file_helloworld_proto_rawDescData)
+	})
+	return file_helloworld_proto_rawDescData
+}
+
+var file_helloworld_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
+var file_helloworld_proto_goTypes = []interface{}{
+	(*HelloRequest)(nil), // 0: helloworld.HelloRequest
+	(*HelloReply)(nil),   // 1: helloworld.HelloReply
+}
+var file_helloworld_proto_depIdxs = []int32{
+	0, // 0: helloworld.Greeter.SayHello:input_type -> helloworld.HelloRequest
+	0, // 1: helloworld.GreeterServerSideSStream.SayHello:input_type -> helloworld.HelloRequest
+	0, // 2: helloworld.GreeterClientSideStream.SayHello:input_type -> helloworld.HelloRequest
+	0, // 3: helloworld.GreeterBidirectionalStream.SayHello:input_type -> helloworld.HelloRequest
+	1, // 4: helloworld.Greeter.SayHello:output_type -> helloworld.HelloReply
+	1, // 5: helloworld.GreeterServerSideSStream.SayHello:output_type -> helloworld.HelloReply
+	1, // 6: helloworld.GreeterClientSideStream.SayHello:output_type -> helloworld.HelloReply
+	1, // 7: helloworld.GreeterBidirectionalStream.SayHello:output_type -> helloworld.HelloReply
+	4, // [4:8] is the sub-list for method output_type
+	0, // [0:4] 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_helloworld_proto_init() }
+func file_helloworld_proto_init() {
+	if File_helloworld_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_helloworld_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*HelloRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_helloworld_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*HelloReply); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_helloworld_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   2,
+			NumExtensions: 0,
+			NumServices:   4,
+		},
+		GoTypes:           file_helloworld_proto_goTypes,
+		DependencyIndexes: file_helloworld_proto_depIdxs,
+		MessageInfos:      file_helloworld_proto_msgTypes,
+	}.Build()
+	File_helloworld_proto = out.File
+	file_helloworld_proto_rawDesc = nil
+	file_helloworld_proto_goTypes = nil
+	file_helloworld_proto_depIdxs = nil
+}

_examples/mvc/grpc-compatible-bidirectional-stream/helloworld/helloworld_grpc.pb.go

@@ -0,0 +1,450 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+
+package helloworld
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion7
+
+// GreeterClient is the client API for Greeter service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type GreeterClient interface {
+	// Sends a greeting
+	SayHello(ctx context.Context, in *HelloRequest, opts ...grpc.CallOption) (*HelloReply, error)
+}
+
+type greeterClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewGreeterClient(cc grpc.ClientConnInterface) GreeterClient {
+	return &greeterClient{cc}
+}
+
+func (c *greeterClient) SayHello(ctx context.Context, in *HelloRequest, opts ...grpc.CallOption) (*HelloReply, error) {
+	out := new(HelloReply)
+	err := c.cc.Invoke(ctx, "/helloworld.Greeter/SayHello", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// GreeterServer is the server API for Greeter service.
+// All implementations must embed UnimplementedGreeterServer
+// for forward compatibility
+type GreeterServer interface {
+	// Sends a greeting
+	SayHello(context.Context, *HelloRequest) (*HelloReply, error)
+	mustEmbedUnimplementedGreeterServer()
+}
+
+// UnimplementedGreeterServer must be embedded to have forward compatible implementations.
+type UnimplementedGreeterServer struct {
+}
+
+func (UnimplementedGreeterServer) SayHello(context.Context, *HelloRequest) (*HelloReply, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method SayHello not implemented")
+}
+func (UnimplementedGreeterServer) mustEmbedUnimplementedGreeterServer() {}
+
+// UnsafeGreeterServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to GreeterServer will
+// result in compilation errors.
+type UnsafeGreeterServer interface {
+	mustEmbedUnimplementedGreeterServer()
+}
+
+func RegisterGreeterServer(s grpc.ServiceRegistrar, srv GreeterServer) {
+	s.RegisterService(&_Greeter_serviceDesc, srv)
+}
+
+func _Greeter_SayHello_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(HelloRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(GreeterServer).SayHello(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/helloworld.Greeter/SayHello",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(GreeterServer).SayHello(ctx, req.(*HelloRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _Greeter_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "helloworld.Greeter",
+	HandlerType: (*GreeterServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "SayHello",
+			Handler:    _Greeter_SayHello_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "helloworld.proto",
+}
+
+// GreeterServerSideSStreamClient is the client API for GreeterServerSideSStream service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type GreeterServerSideSStreamClient interface {
+	// Sends a greeting
+	SayHello(ctx context.Context, in *HelloRequest, opts ...grpc.CallOption) (GreeterServerSideSStream_SayHelloClient, error)
+}
+
+type greeterServerSideSStreamClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewGreeterServerSideSStreamClient(cc grpc.ClientConnInterface) GreeterServerSideSStreamClient {
+	return &greeterServerSideSStreamClient{cc}
+}
+
+func (c *greeterServerSideSStreamClient) SayHello(ctx context.Context, in *HelloRequest, opts ...grpc.CallOption) (GreeterServerSideSStream_SayHelloClient, error) {
+	stream, err := c.cc.NewStream(ctx, &_GreeterServerSideSStream_serviceDesc.Streams[0], "/helloworld.GreeterServerSideSStream/SayHello", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &greeterServerSideSStreamSayHelloClient{stream}
+	if err := x.ClientStream.SendMsg(in); err != nil {
+		return nil, err
+	}
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	return x, nil
+}
+
+type GreeterServerSideSStream_SayHelloClient interface {
+	Recv() (*HelloReply, error)
+	grpc.ClientStream
+}
+
+type greeterServerSideSStreamSayHelloClient struct {
+	grpc.ClientStream
+}
+
+func (x *greeterServerSideSStreamSayHelloClient) Recv() (*HelloReply, error) {
+	m := new(HelloReply)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// GreeterServerSideSStreamServer is the server API for GreeterServerSideSStream service.
+// All implementations must embed UnimplementedGreeterServerSideSStreamServer
+// for forward compatibility
+type GreeterServerSideSStreamServer interface {
+	// Sends a greeting
+	SayHello(*HelloRequest, GreeterServerSideSStream_SayHelloServer) error
+	mustEmbedUnimplementedGreeterServerSideSStreamServer()
+}
+
+// UnimplementedGreeterServerSideSStreamServer must be embedded to have forward compatible implementations.
+type UnimplementedGreeterServerSideSStreamServer struct {
+}
+
+func (UnimplementedGreeterServerSideSStreamServer) SayHello(*HelloRequest, GreeterServerSideSStream_SayHelloServer) error {
+	return status.Errorf(codes.Unimplemented, "method SayHello not implemented")
+}
+func (UnimplementedGreeterServerSideSStreamServer) mustEmbedUnimplementedGreeterServerSideSStreamServer() {
+}
+
+// UnsafeGreeterServerSideSStreamServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to GreeterServerSideSStreamServer will
+// result in compilation errors.
+type UnsafeGreeterServerSideSStreamServer interface {
+	mustEmbedUnimplementedGreeterServerSideSStreamServer()
+}
+
+func RegisterGreeterServerSideSStreamServer(s grpc.ServiceRegistrar, srv GreeterServerSideSStreamServer) {
+	s.RegisterService(&_GreeterServerSideSStream_serviceDesc, srv)
+}
+
+func _GreeterServerSideSStream_SayHello_Handler(srv interface{}, stream grpc.ServerStream) error {
+	m := new(HelloRequest)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
+	}
+	return srv.(GreeterServerSideSStreamServer).SayHello(m, &greeterServerSideSStreamSayHelloServer{stream})
+}
+
+type GreeterServerSideSStream_SayHelloServer interface {
+	Send(*HelloReply) error
+	grpc.ServerStream
+}
+
+type greeterServerSideSStreamSayHelloServer struct {
+	grpc.ServerStream
+}
+
+func (x *greeterServerSideSStreamSayHelloServer) Send(m *HelloReply) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+var _GreeterServerSideSStream_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "helloworld.GreeterServerSideSStream",
+	HandlerType: (*GreeterServerSideSStreamServer)(nil),
+	Methods:     []grpc.MethodDesc{},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "SayHello",
+			Handler:       _GreeterServerSideSStream_SayHello_Handler,
+			ServerStreams: true,
+		},
+	},
+	Metadata: "helloworld.proto",
+}
+
+// GreeterClientSideStreamClient is the client API for GreeterClientSideStream service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type GreeterClientSideStreamClient interface {
+	// Sends a greeting
+	SayHello(ctx context.Context, opts ...grpc.CallOption) (GreeterClientSideStream_SayHelloClient, error)
+}
+
+type greeterClientSideStreamClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewGreeterClientSideStreamClient(cc grpc.ClientConnInterface) GreeterClientSideStreamClient {
+	return &greeterClientSideStreamClient{cc}
+}
+
+func (c *greeterClientSideStreamClient) SayHello(ctx context.Context, opts ...grpc.CallOption) (GreeterClientSideStream_SayHelloClient, error) {
+	stream, err := c.cc.NewStream(ctx, &_GreeterClientSideStream_serviceDesc.Streams[0], "/helloworld.GreeterClientSideStream/SayHello", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &greeterClientSideStreamSayHelloClient{stream}
+	return x, nil
+}
+
+type GreeterClientSideStream_SayHelloClient interface {
+	Send(*HelloRequest) error
+	CloseAndRecv() (*HelloReply, error)
+	grpc.ClientStream
+}
+
+type greeterClientSideStreamSayHelloClient struct {
+	grpc.ClientStream
+}
+
+func (x *greeterClientSideStreamSayHelloClient) Send(m *HelloRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *greeterClientSideStreamSayHelloClient) CloseAndRecv() (*HelloReply, error) {
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	m := new(HelloReply)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// GreeterClientSideStreamServer is the server API for GreeterClientSideStream service.
+// All implementations must embed UnimplementedGreeterClientSideStreamServer
+// for forward compatibility
+type GreeterClientSideStreamServer interface {
+	// Sends a greeting
+	SayHello(GreeterClientSideStream_SayHelloServer) error
+	mustEmbedUnimplementedGreeterClientSideStreamServer()
+}
+
+// UnimplementedGreeterClientSideStreamServer must be embedded to have forward compatible implementations.
+type UnimplementedGreeterClientSideStreamServer struct {
+}
+
+func (UnimplementedGreeterClientSideStreamServer) SayHello(GreeterClientSideStream_SayHelloServer) error {
+	return status.Errorf(codes.Unimplemented, "method SayHello not implemented")
+}
+func (UnimplementedGreeterClientSideStreamServer) mustEmbedUnimplementedGreeterClientSideStreamServer() {
+}
+
+// UnsafeGreeterClientSideStreamServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to GreeterClientSideStreamServer will
+// result in compilation errors.
+type UnsafeGreeterClientSideStreamServer interface {
+	mustEmbedUnimplementedGreeterClientSideStreamServer()
+}
+
+func RegisterGreeterClientSideStreamServer(s grpc.ServiceRegistrar, srv GreeterClientSideStreamServer) {
+	s.RegisterService(&_GreeterClientSideStream_serviceDesc, srv)
+}
+
+func _GreeterClientSideStream_SayHello_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(GreeterClientSideStreamServer).SayHello(&greeterClientSideStreamSayHelloServer{stream})
+}
+
+type GreeterClientSideStream_SayHelloServer interface {
+	SendAndClose(*HelloReply) error
+	Recv() (*HelloRequest, error)
+	grpc.ServerStream
+}
+
+type greeterClientSideStreamSayHelloServer struct {
+	grpc.ServerStream
+}
+
+func (x *greeterClientSideStreamSayHelloServer) SendAndClose(m *HelloReply) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *greeterClientSideStreamSayHelloServer) Recv() (*HelloRequest, error) {
+	m := new(HelloRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+var _GreeterClientSideStream_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "helloworld.GreeterClientSideStream",
+	HandlerType: (*GreeterClientSideStreamServer)(nil),
+	Methods:     []grpc.MethodDesc{},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "SayHello",
+			Handler:       _GreeterClientSideStream_SayHello_Handler,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "helloworld.proto",
+}
+
+// GreeterBidirectionalStreamClient is the client API for GreeterBidirectionalStream service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type GreeterBidirectionalStreamClient interface {
+	// Sends a greeting
+	SayHello(ctx context.Context, opts ...grpc.CallOption) (GreeterBidirectionalStream_SayHelloClient, error)
+}
+
+type greeterBidirectionalStreamClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewGreeterBidirectionalStreamClient(cc grpc.ClientConnInterface) GreeterBidirectionalStreamClient {
+	return &greeterBidirectionalStreamClient{cc}
+}
+
+func (c *greeterBidirectionalStreamClient) SayHello(ctx context.Context, opts ...grpc.CallOption) (GreeterBidirectionalStream_SayHelloClient, error) {
+	stream, err := c.cc.NewStream(ctx, &_GreeterBidirectionalStream_serviceDesc.Streams[0], "/helloworld.GreeterBidirectionalStream/SayHello", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &greeterBidirectionalStreamSayHelloClient{stream}
+	return x, nil
+}
+
+type GreeterBidirectionalStream_SayHelloClient interface {
+	Send(*HelloRequest) error
+	Recv() (*HelloReply, error)
+	grpc.ClientStream
+}
+
+type greeterBidirectionalStreamSayHelloClient struct {
+	grpc.ClientStream
+}
+
+func (x *greeterBidirectionalStreamSayHelloClient) Send(m *HelloRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *greeterBidirectionalStreamSayHelloClient) Recv() (*HelloReply, error) {
+	m := new(HelloReply)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// GreeterBidirectionalStreamServer is the server API for GreeterBidirectionalStream service.
+// All implementations must embed UnimplementedGreeterBidirectionalStreamServer
+// for forward compatibility
+type GreeterBidirectionalStreamServer interface {
+	// Sends a greeting
+	SayHello(GreeterBidirectionalStream_SayHelloServer) error
+	mustEmbedUnimplementedGreeterBidirectionalStreamServer()
+}
+
+// UnimplementedGreeterBidirectionalStreamServer must be embedded to have forward compatible implementations.
+type UnimplementedGreeterBidirectionalStreamServer struct {
+}
+
+func (UnimplementedGreeterBidirectionalStreamServer) SayHello(GreeterBidirectionalStream_SayHelloServer) error {
+	return status.Errorf(codes.Unimplemented, "method SayHello not implemented")
+}
+func (UnimplementedGreeterBidirectionalStreamServer) mustEmbedUnimplementedGreeterBidirectionalStreamServer() {
+}
+
+// UnsafeGreeterBidirectionalStreamServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to GreeterBidirectionalStreamServer will
+// result in compilation errors.
+type UnsafeGreeterBidirectionalStreamServer interface {
+	mustEmbedUnimplementedGreeterBidirectionalStreamServer()
+}
+
+func RegisterGreeterBidirectionalStreamServer(s grpc.ServiceRegistrar, srv GreeterBidirectionalStreamServer) {
+	s.RegisterService(&_GreeterBidirectionalStream_serviceDesc, srv)
+}
+
+func _GreeterBidirectionalStream_SayHello_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(GreeterBidirectionalStreamServer).SayHello(&greeterBidirectionalStreamSayHelloServer{stream})
+}
+
+type GreeterBidirectionalStream_SayHelloServer interface {
+	Send(*HelloReply) error
+	Recv() (*HelloRequest, error)
+	grpc.ServerStream
+}
+
+type greeterBidirectionalStreamSayHelloServer struct {
+	grpc.ServerStream
+}
+
+func (x *greeterBidirectionalStreamSayHelloServer) Send(m *HelloReply) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *greeterBidirectionalStreamSayHelloServer) Recv() (*HelloRequest, error) {
+	m := new(HelloRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+var _GreeterBidirectionalStream_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "helloworld.GreeterBidirectionalStream",
+	HandlerType: (*GreeterBidirectionalStreamServer)(nil),
+	Methods:     []grpc.MethodDesc{},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "SayHello",
+			Handler:       _GreeterBidirectionalStream_SayHello_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "helloworld.proto",
+}

_examples/mvc/grpc-compatible-bidirectional-stream/server.crt

@@ -0,0 +1,17 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

_examples/mvc/grpc-compatible-bidirectional-stream/server.key

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

_examples/mvc/grpc-compatible-bidirectional-stream/server/main.go

@@ -0,0 +1,50 @@
+package main
+
+import (
+	"io"
+
+	pb "grpcexample/helloworld"
+
+	"github.com/kataras/iris/v12"
+	"github.com/kataras/iris/v12/mvc"
+
+	"google.golang.org/grpc"
+)
+
+type Greeter struct {
+	pb.UnimplementedGreeterBidirectionalStreamServer
+}
+
+// SayHello implements the proto Bidirectional Stream Greeter service.
+func (g *Greeter) SayHello(stream pb.GreeterBidirectionalStream_SayHelloServer) error {
+	for {
+		in, err := stream.Recv()
+		if err == io.EOF {
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+		println("Received input: " + in.Name)
+		// On client side you can implement the 'read' operation too.
+		stream.Send(&pb.HelloReply{Message: "Hello " + in.Name})
+	}
+}
+
+func main() {
+	app := iris.New()
+
+	grpcServer := grpc.NewServer()
+
+	myService := &Greeter{}
+	pb.RegisterGreeterBidirectionalStreamServer(grpcServer, myService)
+
+	rootApp := mvc.New(app)
+	rootApp.Handle(myService, mvc.GRPC{
+		Server:      grpcServer,                              // Required.
+		ServiceName: "helloworld.GreeterBidirectionalStream", // Required.
+		Strict:      true,                                    // Set it to true on gRPC streaming.
+	})
+
+	app.Run(iris.TLS(":443", "../server.crt", "../server.key"))
+}

hero/binding.go

@@ -248,8 +248,29 @@ func getBindingsForFunc(fn reflect.Value, dependencies []*Dependency, paramsCoun
 	}
 
 	bindings := getBindingsFor(inputs, dependencies, paramsCount)
-	if expected, got := n, len(bindings); expected > got {
+	if expected, got := n, len(bindings); expected != got {
-		panic(fmt.Sprintf("expected [%d] bindings (input parameters) but got [%d]", expected, got))
+		expectedInputs := ""
+		missingInputs := ""
+		for i, in := range inputs {
+			pos := i + 1
+			typName := in.String()
+			expectedInputs += fmt.Sprintf("\n  - [%d] %s", pos, typName)
+			found := false
+			for _, b := range bindings {
+				if b.Input.Index == i {
+					found = true
+					break
+				}
+			}
+
+			if !found {
+				missingInputs += fmt.Sprintf("\n  - [%d] %s", pos, typName)
+			}
+		}
+
+		fnName := context.HandlerName(fn)
+		panic(fmt.Sprintf("expected [%d] bindings (input parameters) but got [%d]\nFunction:\n  - %s\nExpected:%s\nMissing:%s",
+			expected, got, fnName, expectedInputs, missingInputs))
 	}
 
 	return bindings

mvc/grpc.go

@@ -47,17 +47,16 @@ func (g GRPC) Apply(c *ControllerActivator) {
 			return
 		}
 
-		if g.Strict {
+		// If strict was false, allow common HTTP clients, consumes and produces JSON.
-			ctx.NotFound()
-		} else {
-			// Allow common HTTP clients, consumes and produces JSON.
 		ctx.Next()
 	}
-	}
 
 	for i := 0; i < c.Type.NumMethod(); i++ {
 		m := c.Type.Method(i)
 		path := path.Join(g.ServiceName, m.Name)
+		if g.Strict {
+			c.app.Router.HandleMany(http.MethodPost, path, pre)
+		} else {
 			if route := c.Handle(http.MethodPost, path, m.Name, pre); route != nil {
 				bckp := route.Description
 				route.Description = "gRPC"
@@ -67,4 +66,6 @@ func (g GRPC) Apply(c *ControllerActivator) {
 				route.Description += " " + bckp // e.g. "gRPC controller"
 			}
 		}
+
+	}
 }

mvc/mvc.go

@@ -366,6 +366,10 @@ func logController(logger *golog.Logger, c *ControllerActivator) {
 		return
 	}
 
+	if c.injector == nil { // when no actual controller methods are registered.
+		return
+	}
+
 	/*
 		[DBUG] controller.GreetController
 		  ╺ Service         → ./service/greet_service.go:16
@@ -381,7 +385,6 @@ func logController(logger *golog.Logger, c *ControllerActivator) {
 	logger.TimeFormat = ""
 
 	printer := logger.Printer
-
 	reports := c.injector.Container.Reports
 	ctrlName := c.RelName()
 	ctrlScopeType := ""