feat: initial commit

README.md

@@ -0,0 +1,8 @@
+# Go + GRPC (+ Web Server for docs)
+
+To use GRPC:
+
+- Install the newest protobuf release from [Protocol Buffers](https://github.com/protocolbuffers/protobuf/releases)
+- `go install google.golang.org/protobuf/cmd/protoc-gen-go@latest`
+- `go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest`
+

Taskfile.yml

@@ -0,0 +1,6 @@
+version: "3"
+
+tasks:
+  proto:
+    cmds:
+      - protoc --go_out=. --go_opt=paths=source_relative --go-grpc_out=. --go-grpc_opt=paths=source_relative proto/*.proto

client/main.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"context"
+	"gogrpc/proto"
+	"log/slog"
+	"os"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
+)
+
+func main() {
+	conn, err := grpc.NewClient("127.0.0.1:1337", grpc.WithTransportCredentials(insecure.NewCredentials()))
+	if err != nil {
+		slog.Error("Failed to connect to server", "err", err.Error())
+		os.Exit(1)
+	}
+	defer conn.Close()
+
+	client := proto.NewServiceClient(conn)
+	input := proto.PingMessage{Message: "ping"}
+	output, err := client.Ping(context.Background(), &input)
+	if err != nil {
+		slog.Error("failed to execute ping", "err", err.Error())
+		os.Exit(1)
+	}
+
+	slog.Info("received response", "message", output.Message)
+}

go.mod

@@ -0,0 +1,43 @@
+module gogrpc
+
+go 1.25.4
+
+require (
+	github.com/gin-gonic/gin v1.11.0
+	google.golang.org/grpc v1.78.0
+	google.golang.org/protobuf v1.36.10
+)
+
+require (
+	github.com/bytedance/sonic v1.14.0 // indirect
+	github.com/bytedance/sonic/loader v0.3.0 // indirect
+	github.com/cloudwego/base64x v0.1.6 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.8 // indirect
+	github.com/gin-contrib/sse v1.1.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.27.0 // indirect
+	github.com/goccy/go-json v0.10.2 // indirect
+	github.com/goccy/go-yaml v1.18.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
+	github.com/quic-go/qpack v0.5.1 // indirect
+	github.com/quic-go/quic-go v0.54.0 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.3.0 // indirect
+	go.uber.org/mock v0.5.0 // indirect
+	golang.org/x/arch v0.20.0 // indirect
+	golang.org/x/crypto v0.44.0 // indirect
+	golang.org/x/mod v0.29.0 // indirect
+	golang.org/x/net v0.47.0 // indirect
+	golang.org/x/sync v0.18.0 // indirect
+	golang.org/x/sys v0.38.0 // indirect
+	golang.org/x/text v0.31.0 // indirect
+	golang.org/x/tools v0.38.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20251029180050-ab9386a59fda // indirect
+)

go.sum

@@ -0,0 +1,114 @@
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main.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+	"embed"
+	"gogrpc/proto"
+	"log/slog"
+	"net"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"google.golang.org/grpc"
+)
+
+//go:embed proto
+var protoFS embed.FS
+
+func startWebServer(abort chan struct{}) {
+	fileServer := http.FileServer(http.FS(protoFS))
+
+	r := gin.Default()
+	r.GET("/*filepath", gin.WrapH(fileServer))
+
+	r.Run()
+
+	slog.Error("failed to start web server")
+	abort <- struct{}{}
+}
+
+func startGrpcServer(abort chan struct{}) {
+	listener, _ := net.Listen("tcp", ":1337")
+	service := grpc.NewServer()
+	proto.RegisterServiceServer(service, &Service{})
+	service.Serve(listener)
+
+	slog.Error("failed to start grpc server")
+	abort <- struct{}{}
+}
+
+func main() {
+	abort := make(chan struct{})
+
+	go startWebServer(abort)
+	go startGrpcServer(abort)
+
+	<-abort
+}

proto/readme.md

@@ -0,0 +1,3 @@
+# Service
+
+the service runs on port 1337

proto/service.pb.go

@@ -0,0 +1,126 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.36.11
+// 	protoc        v6.33.2
+// source: proto/service.proto
+
+package proto
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+	unsafe "unsafe"
+)
+
+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)
+)
+
+type PingMessage struct {
+	state         protoimpl.MessageState `protogen:"open.v1"`
+	Message       string                 `protobuf:"bytes,1,opt,name=message,proto3" json:"message,omitempty"`
+	unknownFields protoimpl.UnknownFields
+	sizeCache     protoimpl.SizeCache
+}
+
+func (x *PingMessage) Reset() {
+	*x = PingMessage{}
+	mi := &file_proto_service_proto_msgTypes[0]
+	ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+	ms.StoreMessageInfo(mi)
+}
+
+func (x *PingMessage) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*PingMessage) ProtoMessage() {}
+
+func (x *PingMessage) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_service_proto_msgTypes[0]
+	if x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use PingMessage.ProtoReflect.Descriptor instead.
+func (*PingMessage) Descriptor() ([]byte, []int) {
+	return file_proto_service_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *PingMessage) GetMessage() string {
+	if x != nil {
+		return x.Message
+	}
+	return ""
+}
+
+var File_proto_service_proto protoreflect.FileDescriptor
+
+const file_proto_service_proto_rawDesc = "" +
+	"\n" +
+	"\x13proto/service.proto\"'\n" +
+	"\vPingMessage\x12\x18\n" +
+	"\amessage\x18\x01 \x01(\tR\amessage2-\n" +
+	"\aService\x12\"\n" +
+	"\x04Ping\x12\f.PingMessage\x1a\f.PingMessageB\x0eZ\fgogrpc/protob\x06proto3"
+
+var (
+	file_proto_service_proto_rawDescOnce sync.Once
+	file_proto_service_proto_rawDescData []byte
+)
+
+func file_proto_service_proto_rawDescGZIP() []byte {
+	file_proto_service_proto_rawDescOnce.Do(func() {
+		file_proto_service_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_proto_service_proto_rawDesc), len(file_proto_service_proto_rawDesc)))
+	})
+	return file_proto_service_proto_rawDescData
+}
+
+var file_proto_service_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_proto_service_proto_goTypes = []any{
+	(*PingMessage)(nil), // 0: PingMessage
+}
+var file_proto_service_proto_depIdxs = []int32{
+	0, // 0: Service.Ping:input_type -> PingMessage
+	0, // 1: Service.Ping:output_type -> PingMessage
+	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_proto_service_proto_init() }
+func file_proto_service_proto_init() {
+	if File_proto_service_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: unsafe.Slice(unsafe.StringData(file_proto_service_proto_rawDesc), len(file_proto_service_proto_rawDesc)),
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_proto_service_proto_goTypes,
+		DependencyIndexes: file_proto_service_proto_depIdxs,
+		MessageInfos:      file_proto_service_proto_msgTypes,
+	}.Build()
+	File_proto_service_proto = out.File
+	file_proto_service_proto_goTypes = nil
+	file_proto_service_proto_depIdxs = nil
+}

proto/service.proto

@@ -0,0 +1,11 @@
+syntax = "proto3";
+
+option go_package = "gogrpc/proto";
+
+message PingMessage {
+    string message = 1;
+}
+
+service Service {
+    rpc Ping (PingMessage) returns (PingMessage);
+}

proto/service_grpc.pb.go

@@ -0,0 +1,122 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-grpc v1.6.0
+// - protoc             v6.33.2
+// source: proto/service.proto
+
+package proto
+
+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.
+// Requires gRPC-Go v1.64.0 or later.
+const _ = grpc.SupportPackageIsVersion9
+
+const (
+	Service_Ping_FullMethodName = "/Service/Ping"
+)
+
+// ServiceClient is the client API for Service 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 ServiceClient interface {
+	Ping(ctx context.Context, in *PingMessage, opts ...grpc.CallOption) (*PingMessage, error)
+}
+
+type serviceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewServiceClient(cc grpc.ClientConnInterface) ServiceClient {
+	return &serviceClient{cc}
+}
+
+func (c *serviceClient) Ping(ctx context.Context, in *PingMessage, opts ...grpc.CallOption) (*PingMessage, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(PingMessage)
+	err := c.cc.Invoke(ctx, Service_Ping_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// ServiceServer is the server API for Service service.
+// All implementations must embed UnimplementedServiceServer
+// for forward compatibility.
+type ServiceServer interface {
+	Ping(context.Context, *PingMessage) (*PingMessage, error)
+	mustEmbedUnimplementedServiceServer()
+}
+
+// UnimplementedServiceServer must be embedded to have
+// forward compatible implementations.
+//
+// NOTE: this should be embedded by value instead of pointer to avoid a nil
+// pointer dereference when methods are called.
+type UnimplementedServiceServer struct{}
+
+func (UnimplementedServiceServer) Ping(context.Context, *PingMessage) (*PingMessage, error) {
+	return nil, status.Error(codes.Unimplemented, "method Ping not implemented")
+}
+func (UnimplementedServiceServer) mustEmbedUnimplementedServiceServer() {}
+func (UnimplementedServiceServer) testEmbeddedByValue()                 {}
+
+// UnsafeServiceServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to ServiceServer will
+// result in compilation errors.
+type UnsafeServiceServer interface {
+	mustEmbedUnimplementedServiceServer()
+}
+
+func RegisterServiceServer(s grpc.ServiceRegistrar, srv ServiceServer) {
+	// If the following call panics, it indicates UnimplementedServiceServer was
+	// embedded by pointer and is nil.  This will cause panics if an
+	// unimplemented method is ever invoked, so we test this at initialization
+	// time to prevent it from happening at runtime later due to I/O.
+	if t, ok := srv.(interface{ testEmbeddedByValue() }); ok {
+		t.testEmbeddedByValue()
+	}
+	s.RegisterService(&Service_ServiceDesc, srv)
+}
+
+func _Service_Ping_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(PingMessage)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(ServiceServer).Ping(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: Service_Ping_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(ServiceServer).Ping(ctx, req.(*PingMessage))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// Service_ServiceDesc is the grpc.ServiceDesc for Service service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var Service_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "Service",
+	HandlerType: (*ServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Ping",
+			Handler:    _Service_Ping_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "proto/service.proto",
+}

service.go

@@ -0,0 +1,16 @@
+package main
+
+import (
+	"context"
+	"gogrpc/proto"
+)
+
+type Service struct {
+	proto.UnimplementedServiceServer
+}
+
+func (s *Service) Ping(context.Context, *proto.PingMessage) (*proto.PingMessage, error) {
+	return &proto.PingMessage{Message: "pong"}, nil
+}
+
+var _ proto.ServiceServer = (*Service)(nil)