add a full gRPC example as previously requested at: https://github.com/kataras/iris/issues/1449

Former-commit-id: 0cb5121e7d44644f7f0eb34597ff34274157fe95

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

@@ -0,0 +1,47 @@
+// Package main implements a client for Greeter service.
+package main
+
+import (
+	"context"
+	"log"
+	"os"
+	"time"
+
+	pb "github.com/kataras/iris/v12/_examples/mvc/grpc-compatible/helloworld"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+)
+
+const (
+	address     = "localhost:443"
+	defaultName = "world"
+)
+
+func main() {
+	// Set up a connection to the server.
+	cred, err := credentials.NewClientTLSFromFile("../server.crt", "localhost")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	conn, err := grpc.Dial(address, grpc.WithTransportCredentials(cred), grpc.WithBlock())
+	if err != nil {
+		log.Fatalf("did not connect: %v", err)
+	}
+	defer conn.Close()
+	c := pb.NewGreeterClient(conn)
+
+	// Contact the server and print out its response.
+	name := defaultName
+	if len(os.Args) > 1 {
+		name = os.Args[1]
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	defer cancel()
+	r, err := c.PostHello(ctx, &pb.HelloRequest{Name: name})
+	if err != nil {
+		log.Fatalf("could not greet: %v", err)
+	}
+	log.Printf("Greeting: %s", r.GetMessage())
+}

_examples/mvc/grpc-compatible/helloworld/README.md

@@ -0,0 +1,3 @@
+# Helloworld gRPC Example
+
+https://github.com/grpc/grpc-go/tree/master/examples/helloworld

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

@@ -0,0 +1,210 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: helloworld.proto
+
+package helloworld
+
+import (
+	context "context"
+	fmt "fmt"
+	math "math"
+
+	proto "github.com/golang/protobuf/proto"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+
+// The request message containing the user's name.
+type HelloRequest struct {
+	Name                 string   `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *HelloRequest) Reset()         { *m = HelloRequest{} }
+func (m *HelloRequest) String() string { return proto.CompactTextString(m) }
+func (*HelloRequest) ProtoMessage()    {}
+func (*HelloRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_17b8c58d586b62f2, []int{0}
+}
+
+func (m *HelloRequest) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_HelloRequest.Unmarshal(m, b)
+}
+func (m *HelloRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_HelloRequest.Marshal(b, m, deterministic)
+}
+func (m *HelloRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_HelloRequest.Merge(m, src)
+}
+func (m *HelloRequest) XXX_Size() int {
+	return xxx_messageInfo_HelloRequest.Size(m)
+}
+func (m *HelloRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_HelloRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_HelloRequest proto.InternalMessageInfo
+
+func (m *HelloRequest) GetName() string {
+	if m != nil {
+		return m.Name
+	}
+	return ""
+}
+
+// The response message containing the greetings
+type HelloReply struct {
+	Message              string   `protobuf:"bytes,1,opt,name=message,proto3" json:"message,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *HelloReply) Reset()         { *m = HelloReply{} }
+func (m *HelloReply) String() string { return proto.CompactTextString(m) }
+func (*HelloReply) ProtoMessage()    {}
+func (*HelloReply) Descriptor() ([]byte, []int) {
+	return fileDescriptor_17b8c58d586b62f2, []int{1}
+}
+
+func (m *HelloReply) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_HelloReply.Unmarshal(m, b)
+}
+func (m *HelloReply) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_HelloReply.Marshal(b, m, deterministic)
+}
+func (m *HelloReply) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_HelloReply.Merge(m, src)
+}
+func (m *HelloReply) XXX_Size() int {
+	return xxx_messageInfo_HelloReply.Size(m)
+}
+func (m *HelloReply) XXX_DiscardUnknown() {
+	xxx_messageInfo_HelloReply.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_HelloReply proto.InternalMessageInfo
+
+func (m *HelloReply) GetMessage() string {
+	if m != nil {
+		return m.Message
+	}
+	return ""
+}
+
+func init() {
+	proto.RegisterType((*HelloRequest)(nil), "helloworld.HelloRequest")
+	proto.RegisterType((*HelloReply)(nil), "helloworld.HelloReply")
+}
+
+func init() { proto.RegisterFile("helloworld.proto", fileDescriptor_17b8c58d586b62f2) }
+
+var fileDescriptor_17b8c58d586b62f2 = []byte{
+	// 175 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0x12, 0xc8, 0x48, 0xcd, 0xc9,
+	0xc9, 0x2f, 0xcf, 0x2f, 0xca, 0x49, 0xd1, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0xe2, 0x42, 0x88,
+	0x28, 0x29, 0x71, 0xf1, 0x78, 0x80, 0x78, 0x41, 0xa9, 0x85, 0xa5, 0xa9, 0xc5, 0x25, 0x42, 0x42,
+	0x5c, 0x2c, 0x79, 0x89, 0xb9, 0xa9, 0x12, 0x8c, 0x0a, 0x8c, 0x1a, 0x9c, 0x41, 0x60, 0xb6, 0x92,
+	0x1a, 0x17, 0x17, 0x54, 0x4d, 0x41, 0x4e, 0xa5, 0x90, 0x04, 0x17, 0x7b, 0x6e, 0x6a, 0x71, 0x71,
+	0x62, 0x3a, 0x4c, 0x11, 0x8c, 0x6b, 0xe4, 0xc9, 0xc5, 0xee, 0x5e, 0x94, 0x9a, 0x5a, 0x92, 0x5a,
+	0x24, 0x64, 0xc7, 0xc5, 0x11, 0x9c, 0x58, 0x09, 0xd6, 0x25, 0x24, 0xa1, 0x87, 0xe4, 0x02, 0x64,
+	0xcb, 0xa4, 0xc4, 0xb0, 0xc8, 0x14, 0xe4, 0x54, 0x2a, 0x31, 0x38, 0x19, 0x70, 0x49, 0x67, 0xe6,
+	0xeb, 0xa5, 0x17, 0x15, 0x24, 0xeb, 0xa5, 0x56, 0x24, 0xe6, 0x16, 0xe4, 0xa4, 0x16, 0x23, 0xa9,
+	0x75, 0xe2, 0x07, 0x2b, 0x0e, 0x07, 0xb1, 0x03, 0x40, 0x5e, 0x0a, 0x60, 0x4c, 0x62, 0x03, 0xfb,
+	0xcd, 0x18, 0x10, 0x00, 0x00, 0xff, 0xff, 0x0f, 0xb7, 0xcd, 0xf2, 0xef, 0x00, 0x00, 0x00,
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConnInterface
+
+// 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.SupportPackageIsVersion6
+
+// GreeterClient is the client API for Greeter service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type GreeterClient interface {
+	// Sends a greeting
+	PostHello(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) PostHello(ctx context.Context, in *HelloRequest, opts ...grpc.CallOption) (*HelloReply, error) {
+	out := new(HelloReply)
+	err := c.cc.Invoke(ctx, "/helloworld.Greeter/PostHello", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// GreeterServer is the server API for Greeter service.
+type GreeterServer interface {
+	// Sends a greeting
+	PostHello(context.Context, *HelloRequest) (*HelloReply, error)
+}
+
+// UnimplementedGreeterServer can be embedded to have forward compatible implementations.
+type UnimplementedGreeterServer struct {
+}
+
+func (*UnimplementedGreeterServer) PostHello(ctx context.Context, req *HelloRequest) (*HelloReply, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method PostHello not implemented")
+}
+
+func RegisterGreeterServer(s *grpc.Server, 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).PostHello(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/helloworld.Greeter/PostHello",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(GreeterServer).PostHello(ctx, req.(*HelloRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _Greeter_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "helloworld.Greeter",
+	HandlerType: (*GreeterServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "PostHello",
+			Handler:    _Greeter_SayHello_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "helloworld.proto",
+}

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

@@ -0,0 +1,23 @@
+syntax = "proto3";
+
+option java_multiple_files = true;
+option java_package = "io.grpc.examples.helloworld";
+option java_outer_classname = "HelloWorldProto";
+
+package helloworld;
+
+// The greeting service definition.
+service Greeter {
+  // Sends a greeting
+  rpc PostHello (HelloRequest) returns (HelloReply) {}
+}
+
+// The request message containing the user's name.
+message HelloRequest {
+  string name = 1;
+}
+
+// The response message containing the greetings
+message HelloReply {
+  string message = 1;
+}

_examples/mvc/grpc-compatible/http-client/main.go

@@ -0,0 +1,50 @@
+package main
+
+import (
+	"bytes"
+	"crypto/tls"
+	"crypto/x509"
+	"encoding/json"
+	"io/ioutil"
+	"log"
+	"net/http"
+
+	pb "github.com/kataras/iris/v12/_examples/mvc/grpc-compatible/helloworld"
+)
+
+func main() {
+	b, err := ioutil.ReadFile("../server.crt")
+	if err != nil {
+		log.Fatal(err)
+	}
+	cp := x509.NewCertPool()
+	if !cp.AppendCertsFromPEM(b) {
+		log.Fatal("credentials: failed to append certificates")
+	}
+
+	transport := &http.Transport{
+		TLSClientConfig: &tls.Config{
+			RootCAs: cp,
+		},
+	}
+
+	client := http.Client{Transport: transport}
+	buf := new(bytes.Buffer)
+	err = json.NewEncoder(buf).Encode(pb.HelloRequest{Name: "world"})
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	resp, err := client.Post("https://localhost/hello", "application/json", buf)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer resp.Body.Close()
+
+	var reply pb.HelloReply
+	err = json.NewDecoder(resp.Body).Decode(&reply)
+	if err != nil {
+		log.Fatal(err)
+	}
+	log.Printf("Greeting: %s", reply.GetMessage())
+}

_examples/mvc/grpc-compatible/main.go

@@ -3,8 +3,13 @@ package main
 import (
 	"context"
 
+	pb "github.com/kataras/iris/v12/_examples/mvc/grpc-compatible/helloworld"
+
 	"github.com/kataras/iris/v12"
+	grpcWrapper "github.com/kataras/iris/v12/middleware/grpc"
 	"github.com/kataras/iris/v12/mvc"
+
+	"google.golang.org/grpc"
 )
 
 // See https://github.com/kataras/iris/issues/1449
@@ -18,33 +23,32 @@ func main() {
 	app := newApp()
 	app.Logger().SetLevel("debug")
 
-	// POST: http://localhost:8080/login
+	// POST: https://localhost/hello
-	// with request data: {"username": "makis"}
+	// with request data: {"name": "John"}
-	// and expected output: {"message": "makis logged"}
+	// and expected output: {"message": "Hello John"}
-	app.Listen(":8080")
+	app.Run(iris.TLS(":443", "server.crt", "server.key"))
 }
 
 func newApp() *iris.Application {
 	app := iris.New()
 
-	mvc.New(app).Handle(&myController{})
+	ctrl := &myController{}
+	// Register gRPC server.
+	grpcServer := grpc.NewServer()
+	pb.RegisterGreeterServer(grpcServer, ctrl)
 
+	// Register MVC application controller.
+	mvc.New(app).Handle(ctrl)
+
+	// Serve the gRPC server under the Iris HTTP webserver one,
+	// the Iris server should ran under TLS (it's a gRPC requirement).
+	app.WrapRouter(grpcWrapper.New(grpcServer))
 	return app
 }
 
 type myController struct{}
 
-type loginRequest struct {
+// PostHello implements helloworld.GreeterServer
-	Username string `json:"username"`
+func (c *myController) PostHello(ctx context.Context, in *pb.HelloRequest) (*pb.HelloReply, error) {
-}
+	return &pb.HelloReply{Message: "Hello " + in.GetName()}, nil
-
-type loginResponse struct {
-	Message string `json:"message"`
-}
-
-func (c *myController) PostLogin(ctx context.Context, input loginRequest) (loginResponse, error) {
-	// [use of ctx to call a gRpc method or a database call...]
-	return loginResponse{
-		Message: input.Username + " logged",
-	}, nil
 }

_examples/mvc/grpc-compatible/main_test.go

@@ -10,7 +10,7 @@ func TestGRPCCompatible(t *testing.T) {
 	app := newApp()
 
 	e := httptest.New(t, app)
-	e.POST("/login").WithJSON(map[string]string{"username": "makis"}).Expect().
+	e.POST("/hello").WithJSON(map[string]string{"name": "makis"}).Expect().
 		Status(httptest.StatusOK).
-		JSON().Equal(map[string]string{"message": "makis logged"})
+		JSON().Equal(map[string]string{"message": "Hello makis"})
 }

_examples/mvc/grpc-compatible/server.crt

@@ -0,0 +1,22 @@
+-----BEGIN CERTIFICATE-----
+MIIDkzCCAnugAwIBAgIUZLvkZXRRB1CP8FEjpRslVNRW4HwwDQYJKoZIhvcNAQEL
+BQAwWTELMAkGA1UEBhMCQVUxEzARBgNVBAgMClNvbWUtU3RhdGUxITAfBgNVBAoM
+GEludGVybmV0IFdpZGdpdHMgUHR5IEx0ZDESMBAGA1UEAwwJbG9jYWxob3N0MB4X
+DTIwMDMwNzEwNDk0N1oXDTMwMDMwNTEwNDk0N1owWTELMAkGA1UEBhMCQVUxEzAR
+BgNVBAgMClNvbWUtU3RhdGUxITAfBgNVBAoMGEludGVybmV0IFdpZGdpdHMgUHR5
+IEx0ZDESMBAGA1UEAwwJbG9jYWxob3N0MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8A
+MIIBCgKCAQEA1M0frpMcALlH2BGNNXdUlH3wmJSe9IUkfu/Il5/8SWuMWed39gL0
+Ps70TLi2cklyu5ZDuos6VRQecrkhtPWqcvM67YGM1unIJDVJJJZaiEMTLCv+1srE
++6DZBPZ3vrtA1Z3GH0xzDGyGyTNeQ+yRjdZkjYlalFkswi83qQzbwMx9bba76Tmg
+ojfwMbYeoXMmQsIeKuCtpHNYo1uY1fIKnBa9CjOaJfshI+ch9YcFuntRYYS/UrXe
+6XTnweFFN4MsSjkxlu7AImT2xW56y9Z64CYLwmT4MDB80FcKS/eRpCyG+KILoZXb
+Jj8weneyG0An6gsAkZuN0I6M+XlXxYCzgQIDAQABo1MwUTAdBgNVHQ4EFgQUZLMV
+958+SxbRbS3Yjy/9Yyo+FYAwHwYDVR0jBBgwFoAUZLMV958+SxbRbS3Yjy/9Yyo+
+FYAwDwYDVR0TAQH/BAUwAwEB/zANBgkqhkiG9w0BAQsFAAOCAQEANNSkFO6bxt8f
+b7ZoNXYdBBopwx6o9e8uMLlWP1Wv3l0AWdn5WBlTj5ZoS90lKPEvLKO+BI096fwc
+lC1P073k3mbXz0fQ/zyyz+7xn6h5FCe66LXU8AhpewolkIogSGwx4NT7lwIYpJ8T
+BQXRtNtP3dH9w8iOpFECQIcLCMBamM1UGithrZRNmzYomFMnQYUz7A41eyXyTZ80
+IE5NbwVmd2XYpwrfqror6wkE5Psp3Fb7flKgMT1bU1ugmojIQEmFAYSUTSI7aNmT
+W1XenU5tvCmSUnUgUW/vxj8u6W5SP5Lr0jirKT6WUON8lo5C/uWjzkX5Ij6J63JI
+w0xukwlSLg==
+-----END CERTIFICATE-----

_examples/mvc/grpc-compatible/server.key

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

_examples/mvc/grpc-compatible/server.keys.md

@@ -0,0 +1,4 @@
+```sh
+$ openssl genrsa -out server.key 2048
+$ openssl req -new -x509 -sha256 -key server.key -out server.crt -days 3650
+```

middleware/grpc/grpc.go

@@ -20,11 +20,11 @@ import (
 //  app.WrapRouter(grpcWrapper.New(grpcServer))
 func New(grpcServer http.Handler) router.WrapperFunc {
 	return func(w http.ResponseWriter, r *http.Request, mux http.HandlerFunc) {
-		if r.ProtoMajor == 2 && strings.HasPrefix(
+		if r.ProtoMajor == 2 && strings.HasPrefix(r.Header.Get("Content-Type"), "application/grpc") {
-			r.Header.Get("Content-Type"), "application/grpc") {
 			grpcServer.ServeHTTP(w, r)
-		} else {
+			return
+		}
+
 		mux.ServeHTTP(w, r)
 	}
 }
-}