GRPC HTTP2+TLS Helloworld example

helloworld.pb.go

// Code generated by protoc-gen-go. DO NOT EDIT.
// versions:
// 	protoc-gen-go v1.23.0
// 	protoc        v3.12.4
// source: helloworld.proto

package main

import (
	context "context"
	proto "github.com/golang/protobuf/proto"
	grpc "google.golang.org/grpc"
	codes "google.golang.org/grpc/codes"
	status "google.golang.org/grpc/status"
	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{
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}

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
	1, // 1: helloworld.Greeter.SayHello:output_type -> helloworld.HelloReply
	1, // [1:2] is the sub-list for method output_type
	0, // [0:1] 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:   1,
		},
		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
}

// 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
	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.
type GreeterServer interface {
	// Sends a greeting
	SayHello(context.Context, *HelloRequest) (*HelloReply, error)
}

// UnimplementedGreeterServer can 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 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).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",
}

helloworld.proto

// based on https://github.com/grpc/grpc-go/tree/master/examples/helloworld
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 SayHello (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;
}

main.go

// based on https://github.com/grpc/grpc-go/tree/master/examples/helloworld
package main

import (
	"context"
	"flag"
	"log"
	"net"

	"google.golang.org/grpc"
	"google.golang.org/grpc/credentials"
)

var keyPath string
var crtPath string
var port string

func init() {
	flag.StringVar(&keyPath, "tls-key", "server.key", "Path of TLS private key")
	flag.StringVar(&crtPath, "tls-crt", "server.crt", "Path of TLS certificate / public key")
	flag.StringVar(&port, "port", ":8000", "Listening port")
	flag.Parse()
}

type server struct{}

func (s *server) SayHello(ctx context.Context, in *HelloRequest) (*HelloReply, error) {
	log.Printf("Received: %v", in.Name)
	return &HelloReply{Message: "Hello " + in.Name}, nil
}

func main() {
	log.Printf("Using cert '%s' and key '%s'\n", crtPath, keyPath)
	creds, _ := credentials.NewServerTLSFromFile(crtPath, keyPath)
	lis, err := net.Listen("tcp", port)
	if err != nil {
		log.Fatalf("failed to listen: %v", err)
	}
	s := grpc.NewServer(grpc.Creds(creds))
	RegisterGreeterServer(s, &server{})

	log.Printf("Listening on port %s\n", port)
	if err := s.Serve(lis); err != nil {
		log.Fatalf("failed to serve: %v", err)
	}
}

Docker image: https://hub.docker.com/r/alibo/grpc-http2-helloworld