add grpc-proxy (github.com/mwitkow/grpc-proxy)

Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>
This commit is contained in:
2024-10-16 15:04:43 +02:00
parent ccf44285f9
commit 9591a64e09
17 changed files with 1931 additions and 0 deletions

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@ -0,0 +1,9 @@
all: test_go
test_go: test.proto
protoc --go_out=. --go_opt=paths=source_relative \
--go-grpc_out=. --go-grpc_opt=paths=source_relative \
test.proto

168
proxy/testservice/ping.go Normal file
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@ -0,0 +1,168 @@
package testservice
import (
"context"
"fmt"
"io"
"golang.org/x/sync/errgroup"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/status"
"google.golang.org/protobuf/types/known/emptypb"
)
var DefaultTestServiceServer = defaultPingServer{}
const (
PingHeader = "ping-header"
PingHeaderCts = "Arbitrary header text"
PingTrailer = "ping-trailer"
PingTrailerCts = "Arbitrary trailer text"
PingEchoHeader = "ping-echo-header"
PingEchoTrailer = "ping-echo-trailer"
)
// defaultPingServer is the canonical implementation of a TestServiceServer.
type defaultPingServer struct {
UnsafeTestServiceServer
}
func (s defaultPingServer) PingEmpty(ctx context.Context, empty *emptypb.Empty) (*PingResponse, error) {
if err := s.sendHeader(ctx); err != nil {
return nil, err
}
if err := s.setTrailer(ctx); err != nil {
return nil, err
}
return &PingResponse{}, nil
}
func (s defaultPingServer) Ping(ctx context.Context, request *PingRequest) (*PingResponse, error) {
if err := s.sendHeader(ctx); err != nil {
return nil, err
}
if err := s.setTrailer(ctx); err != nil {
return nil, err
}
return &PingResponse{Value: request.Value}, nil
}
func (s defaultPingServer) PingError(ctx context.Context, request *PingRequest) (*emptypb.Empty, error) {
if err := s.sendHeader(ctx); err != nil {
return nil, err
}
if err := s.setTrailer(ctx); err != nil {
return nil, err
}
return nil, status.Error(codes.Unknown, "Something is wrong and this is a message that describes it")
}
func (s defaultPingServer) PingList(request *PingRequest, server TestService_PingListServer) error {
if err := s.sendHeader(server.Context()); err != nil {
return err
}
s.setStreamTrailer(server)
for i := 0; i < 10; i++ {
if err := server.Send(&PingResponse{
Value: request.Value,
Counter: int32(i),
}); err != nil {
return err
}
}
return nil
}
func (s defaultPingServer) PingStream(server TestService_PingStreamServer) error {
g, ctx := errgroup.WithContext(context.Background())
if err := s.sendHeader(server.Context()); err != nil {
return err
}
pings := make(chan *PingRequest)
g.Go(func() error {
defer close(pings)
for {
m, err := server.Recv()
if err != nil {
if err == io.EOF {
return nil
}
return err
}
select {
case pings <- m:
case <-ctx.Done():
return ctx.Err()
}
}
})
g.Go(func() error {
var i int32
for m := range pings {
if err := server.Send(&PingResponse{
Value: m.Value,
Counter: i,
}); err != nil {
return err
}
i++
}
return nil
})
return g.Wait()
}
func (s *defaultPingServer) sendHeader(ctx context.Context) error {
md, ok := metadata.FromIncomingContext(ctx)
if !ok {
md = metadata.New(nil)
}
if tvs := md.Get(PingEchoHeader); len(tvs) > 0 {
md.Append(PingEchoHeader, tvs...)
}
md.Append(PingHeader, PingHeaderCts)
if err := grpc.SendHeader(ctx, md); err != nil {
return fmt.Errorf("setting header: %w", err)
}
return nil
}
func (s *defaultPingServer) setTrailer(ctx context.Context) error {
md := s.buildTrailer(ctx)
if err := grpc.SetTrailer(ctx, md); err != nil {
return fmt.Errorf("setting trailer: %w", err)
}
return nil
}
func (s *defaultPingServer) buildTrailer(ctx context.Context) metadata.MD {
md, ok := metadata.FromIncomingContext(ctx)
if !ok {
md = metadata.New(nil)
}
if tvs := md.Get(PingEchoTrailer); len(tvs) > 0 {
md.Append(PingEchoTrailer, tvs...)
}
md.Append(PingTrailer, PingTrailerCts)
return md
}
func (s defaultPingServer) setStreamTrailer(server grpc.ServerStream) {
server.SetTrailer(s.buildTrailer(server.Context()))
}
var _ TestServiceServer = (*defaultPingServer)(nil)

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@ -0,0 +1,54 @@
package main
import (
"flag"
"fmt"
"log"
"net"
"os"
"os/signal"
"syscall"
"google.golang.org/grpc"
"go.linka.cloud/grpc-toolkit/proxy/testservice"
)
var (
port = flag.Uint("port", 8080, "Port to listen to")
)
func main() {
srv := grpc.NewServer()
lis, err := net.Listen("tcp", fmt.Sprintf("localhost:%d", *port))
if err != nil {
panic(err)
}
testservice.RegisterTestServiceServer(srv, testservice.DefaultTestServiceServer)
errs := make(chan error)
go func() {
log.Printf("listening on %s", lis.Addr().String())
errs <- srv.Serve(lis)
}()
sigs := make(chan os.Signal, 1)
signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
go func() {
sig := <-sigs
log.Printf("shutdown due to %s", sig)
srv.GracefulStop()
}()
if err := <-errs; err != nil {
log.Println(err)
os.Exit(1)
}
os.Exit(0)
}
func init() {
flag.Parse()
}

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@ -0,0 +1,255 @@
// Code generated by protoc-gen-go. DO NOT EDIT.
// versions:
// protoc-gen-go v1.25.0-devel
// protoc v3.15.5
// source: test.proto
package testservice
import (
protoreflect "google.golang.org/protobuf/reflect/protoreflect"
protoimpl "google.golang.org/protobuf/runtime/protoimpl"
emptypb "google.golang.org/protobuf/types/known/emptypb"
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)
)
type PingRequest struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
Value string `protobuf:"bytes,1,opt,name=value,proto3" json:"value,omitempty"`
}
func (x *PingRequest) Reset() {
*x = PingRequest{}
if protoimpl.UnsafeEnabled {
mi := &file_test_proto_msgTypes[0]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *PingRequest) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*PingRequest) ProtoMessage() {}
func (x *PingRequest) ProtoReflect() protoreflect.Message {
mi := &file_test_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 PingRequest.ProtoReflect.Descriptor instead.
func (*PingRequest) Descriptor() ([]byte, []int) {
return file_test_proto_rawDescGZIP(), []int{0}
}
func (x *PingRequest) GetValue() string {
if x != nil {
return x.Value
}
return ""
}
type PingResponse struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
unknownFields protoimpl.UnknownFields
Value string `protobuf:"bytes,1,opt,name=value,proto3" json:"value,omitempty"`
Counter int32 `protobuf:"varint,2,opt,name=counter,proto3" json:"counter,omitempty"`
}
func (x *PingResponse) Reset() {
*x = PingResponse{}
if protoimpl.UnsafeEnabled {
mi := &file_test_proto_msgTypes[1]
ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
ms.StoreMessageInfo(mi)
}
}
func (x *PingResponse) String() string {
return protoimpl.X.MessageStringOf(x)
}
func (*PingResponse) ProtoMessage() {}
func (x *PingResponse) 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 PingResponse.ProtoReflect.Descriptor instead.
func (*PingResponse) Descriptor() ([]byte, []int) {
return file_test_proto_rawDescGZIP(), []int{1}
}
func (x *PingResponse) GetValue() string {
if x != nil {
return x.Value
}
return ""
}
func (x *PingResponse) GetCounter() int32 {
if x != nil {
return x.Counter
}
return 0
}
var File_test_proto protoreflect.FileDescriptor
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}
var (
file_test_proto_rawDescOnce sync.Once
file_test_proto_rawDescData = file_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)
})
return file_test_proto_rawDescData
}
var file_test_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
var file_test_proto_goTypes = []interface{}{
(*PingRequest)(nil), // 0: mwitkow.testproto.PingRequest
(*PingResponse)(nil), // 1: mwitkow.testproto.PingResponse
(*emptypb.Empty)(nil), // 2: google.protobuf.Empty
}
var file_test_proto_depIdxs = []int32{
2, // 0: mwitkow.testproto.TestService.PingEmpty:input_type -> google.protobuf.Empty
0, // 1: mwitkow.testproto.TestService.Ping:input_type -> mwitkow.testproto.PingRequest
0, // 2: mwitkow.testproto.TestService.PingError:input_type -> mwitkow.testproto.PingRequest
0, // 3: mwitkow.testproto.TestService.PingList:input_type -> mwitkow.testproto.PingRequest
0, // 4: mwitkow.testproto.TestService.PingStream:input_type -> mwitkow.testproto.PingRequest
1, // 5: mwitkow.testproto.TestService.PingEmpty:output_type -> mwitkow.testproto.PingResponse
1, // 6: mwitkow.testproto.TestService.Ping:output_type -> mwitkow.testproto.PingResponse
2, // 7: mwitkow.testproto.TestService.PingError:output_type -> google.protobuf.Empty
1, // 8: mwitkow.testproto.TestService.PingList:output_type -> mwitkow.testproto.PingResponse
1, // 9: mwitkow.testproto.TestService.PingStream:output_type -> mwitkow.testproto.PingResponse
5, // [5:10] is the sub-list for method output_type
0, // [0:5] 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 {
return
}
if !protoimpl.UnsafeEnabled {
file_test_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
switch v := v.(*PingRequest); i {
case 0:
return &v.state
case 1:
return &v.sizeCache
case 2:
return &v.unknownFields
default:
return nil
}
}
file_test_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
switch v := v.(*PingResponse); 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_test_proto_rawDesc,
NumEnums: 0,
NumMessages: 2,
NumExtensions: 0,
NumServices: 1,
},
GoTypes: file_test_proto_goTypes,
DependencyIndexes: file_test_proto_depIdxs,
MessageInfos: file_test_proto_msgTypes,
}.Build()
File_test_proto = out.File
file_test_proto_rawDesc = nil
file_test_proto_goTypes = nil
file_test_proto_depIdxs = nil
}

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@ -0,0 +1,30 @@
syntax = "proto3";
package mwitkow.testproto;
option go_package="go.linka.cloud/grpc-toolkit/proxy/testservice";
import "google/protobuf/empty.proto";
message PingRequest {
string value = 1;
}
message PingResponse {
string value = 1;
int32 counter = 2;
}
service TestService {
rpc PingEmpty(google.protobuf.Empty) returns (PingResponse) {}
rpc Ping(PingRequest) returns (PingResponse) {}
rpc PingError(PingRequest) returns (google.protobuf.Empty) {}
rpc PingList(PingRequest) returns (stream PingResponse) {}
rpc PingStream(stream PingRequest) returns (stream PingResponse) {}
}

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@ -0,0 +1,306 @@
// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
package testservice
import (
context "context"
grpc "google.golang.org/grpc"
codes "google.golang.org/grpc/codes"
status "google.golang.org/grpc/status"
emptypb "google.golang.org/protobuf/types/known/emptypb"
)
// 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 v1.32.0 or later.
const _ = grpc.SupportPackageIsVersion7
// TestServiceClient is the client API for TestService 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 TestServiceClient interface {
PingEmpty(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*PingResponse, error)
Ping(ctx context.Context, in *PingRequest, opts ...grpc.CallOption) (*PingResponse, error)
PingError(ctx context.Context, in *PingRequest, opts ...grpc.CallOption) (*emptypb.Empty, error)
PingList(ctx context.Context, in *PingRequest, opts ...grpc.CallOption) (TestService_PingListClient, error)
PingStream(ctx context.Context, opts ...grpc.CallOption) (TestService_PingStreamClient, error)
}
type testServiceClient struct {
cc grpc.ClientConnInterface
}
func NewTestServiceClient(cc grpc.ClientConnInterface) TestServiceClient {
return &testServiceClient{cc}
}
func (c *testServiceClient) PingEmpty(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*PingResponse, error) {
out := new(PingResponse)
err := c.cc.Invoke(ctx, "/mwitkow.testproto.TestService/PingEmpty", in, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *testServiceClient) Ping(ctx context.Context, in *PingRequest, opts ...grpc.CallOption) (*PingResponse, error) {
out := new(PingResponse)
err := c.cc.Invoke(ctx, "/mwitkow.testproto.TestService/Ping", in, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *testServiceClient) PingError(ctx context.Context, in *PingRequest, opts ...grpc.CallOption) (*emptypb.Empty, error) {
out := new(emptypb.Empty)
err := c.cc.Invoke(ctx, "/mwitkow.testproto.TestService/PingError", in, out, opts...)
if err != nil {
return nil, err
}
return out, nil
}
func (c *testServiceClient) PingList(ctx context.Context, in *PingRequest, opts ...grpc.CallOption) (TestService_PingListClient, error) {
stream, err := c.cc.NewStream(ctx, &TestService_ServiceDesc.Streams[0], "/mwitkow.testproto.TestService/PingList", opts...)
if err != nil {
return nil, err
}
x := &testServicePingListClient{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 TestService_PingListClient interface {
Recv() (*PingResponse, error)
grpc.ClientStream
}
type testServicePingListClient struct {
grpc.ClientStream
}
func (x *testServicePingListClient) Recv() (*PingResponse, error) {
m := new(PingResponse)
if err := x.ClientStream.RecvMsg(m); err != nil {
return nil, err
}
return m, nil
}
func (c *testServiceClient) PingStream(ctx context.Context, opts ...grpc.CallOption) (TestService_PingStreamClient, error) {
stream, err := c.cc.NewStream(ctx, &TestService_ServiceDesc.Streams[1], "/mwitkow.testproto.TestService/PingStream", opts...)
if err != nil {
return nil, err
}
x := &testServicePingStreamClient{stream}
return x, nil
}
type TestService_PingStreamClient interface {
Send(*PingRequest) error
Recv() (*PingResponse, error)
grpc.ClientStream
}
type testServicePingStreamClient struct {
grpc.ClientStream
}
func (x *testServicePingStreamClient) Send(m *PingRequest) error {
return x.ClientStream.SendMsg(m)
}
func (x *testServicePingStreamClient) Recv() (*PingResponse, error) {
m := new(PingResponse)
if err := x.ClientStream.RecvMsg(m); err != nil {
return nil, err
}
return m, nil
}
// TestServiceServer is the server API for TestService service.
// All implementations must embed UnimplementedTestServiceServer
// for forward compatibility
type TestServiceServer interface {
PingEmpty(context.Context, *emptypb.Empty) (*PingResponse, error)
Ping(context.Context, *PingRequest) (*PingResponse, error)
PingError(context.Context, *PingRequest) (*emptypb.Empty, error)
PingList(*PingRequest, TestService_PingListServer) error
PingStream(TestService_PingStreamServer) error
mustEmbedUnimplementedTestServiceServer()
}
// UnimplementedTestServiceServer must be embedded to have forward compatible implementations.
type UnimplementedTestServiceServer struct {
}
func (UnimplementedTestServiceServer) PingEmpty(context.Context, *emptypb.Empty) (*PingResponse, error) {
return nil, status.Errorf(codes.Unimplemented, "method PingEmpty not implemented")
}
func (UnimplementedTestServiceServer) Ping(context.Context, *PingRequest) (*PingResponse, error) {
return nil, status.Errorf(codes.Unimplemented, "method Ping not implemented")
}
func (UnimplementedTestServiceServer) PingError(context.Context, *PingRequest) (*emptypb.Empty, error) {
return nil, status.Errorf(codes.Unimplemented, "method PingError not implemented")
}
func (UnimplementedTestServiceServer) PingList(*PingRequest, TestService_PingListServer) error {
return status.Errorf(codes.Unimplemented, "method PingList not implemented")
}
func (UnimplementedTestServiceServer) PingStream(TestService_PingStreamServer) error {
return status.Errorf(codes.Unimplemented, "method PingStream not implemented")
}
func (UnimplementedTestServiceServer) mustEmbedUnimplementedTestServiceServer() {}
// UnsafeTestServiceServer may be embedded to opt out of forward compatibility for this service.
// Use of this interface is not recommended, as added methods to TestServiceServer will
// result in compilation errors.
type UnsafeTestServiceServer interface {
mustEmbedUnimplementedTestServiceServer()
}
func RegisterTestServiceServer(s grpc.ServiceRegistrar, srv TestServiceServer) {
s.RegisterService(&TestService_ServiceDesc, srv)
}
func _TestService_PingEmpty_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(emptypb.Empty)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(TestServiceServer).PingEmpty(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/mwitkow.testproto.TestService/PingEmpty",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(TestServiceServer).PingEmpty(ctx, req.(*emptypb.Empty))
}
return interceptor(ctx, in, info, handler)
}
func _TestService_Ping_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(PingRequest)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(TestServiceServer).Ping(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/mwitkow.testproto.TestService/Ping",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(TestServiceServer).Ping(ctx, req.(*PingRequest))
}
return interceptor(ctx, in, info, handler)
}
func _TestService_PingError_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
in := new(PingRequest)
if err := dec(in); err != nil {
return nil, err
}
if interceptor == nil {
return srv.(TestServiceServer).PingError(ctx, in)
}
info := &grpc.UnaryServerInfo{
Server: srv,
FullMethod: "/mwitkow.testproto.TestService/PingError",
}
handler := func(ctx context.Context, req interface{}) (interface{}, error) {
return srv.(TestServiceServer).PingError(ctx, req.(*PingRequest))
}
return interceptor(ctx, in, info, handler)
}
func _TestService_PingList_Handler(srv interface{}, stream grpc.ServerStream) error {
m := new(PingRequest)
if err := stream.RecvMsg(m); err != nil {
return err
}
return srv.(TestServiceServer).PingList(m, &testServicePingListServer{stream})
}
type TestService_PingListServer interface {
Send(*PingResponse) error
grpc.ServerStream
}
type testServicePingListServer struct {
grpc.ServerStream
}
func (x *testServicePingListServer) Send(m *PingResponse) error {
return x.ServerStream.SendMsg(m)
}
func _TestService_PingStream_Handler(srv interface{}, stream grpc.ServerStream) error {
return srv.(TestServiceServer).PingStream(&testServicePingStreamServer{stream})
}
type TestService_PingStreamServer interface {
Send(*PingResponse) error
Recv() (*PingRequest, error)
grpc.ServerStream
}
type testServicePingStreamServer struct {
grpc.ServerStream
}
func (x *testServicePingStreamServer) Send(m *PingResponse) error {
return x.ServerStream.SendMsg(m)
}
func (x *testServicePingStreamServer) Recv() (*PingRequest, error) {
m := new(PingRequest)
if err := x.ServerStream.RecvMsg(m); err != nil {
return nil, err
}
return m, nil
}
// TestService_ServiceDesc is the grpc.ServiceDesc for TestService service.
// It's only intended for direct use with grpc.RegisterService,
// and not to be introspected or modified (even as a copy)
var TestService_ServiceDesc = grpc.ServiceDesc{
ServiceName: "mwitkow.testproto.TestService",
HandlerType: (*TestServiceServer)(nil),
Methods: []grpc.MethodDesc{
{
MethodName: "PingEmpty",
Handler: _TestService_PingEmpty_Handler,
},
{
MethodName: "Ping",
Handler: _TestService_Ping_Handler,
},
{
MethodName: "PingError",
Handler: _TestService_PingError_Handler,
},
},
Streams: []grpc.StreamDesc{
{
StreamName: "PingList",
Handler: _TestService_PingList_Handler,
ServerStreams: true,
},
{
StreamName: "PingStream",
Handler: _TestService_PingStream_Handler,
ServerStreams: true,
ClientStreams: true,
},
},
Metadata: "test.proto",
}

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@ -0,0 +1,158 @@
package testservice
import (
"context"
"io"
"reflect"
"testing"
"google.golang.org/grpc"
"google.golang.org/grpc/metadata"
)
const (
returnHeader = "test-client-header"
)
// TestTestServiceServerImpl can be called to test the underlying TestServiceServer.
func TestTestServiceServerImpl(t *testing.T, client TestServiceClient) {
t.Run("Unary ping", func(t *testing.T) {
want := "hello, world"
hdr := metadata.MD{}
res, err := client.Ping(context.TODO(), &PingRequest{Value: want}, grpc.Header(&hdr))
if err != nil {
t.Errorf("want no err; got %v", err)
return
}
checkHeaders(t, hdr)
t.Logf("got %v (%d)", res.Value, res.Counter)
if got := res.Value; got != want {
t.Errorf("res.Value = %q; want %q", got, want)
}
})
t.Run("Error ping", func(t *testing.T) {
_, err := client.PingError(context.TODO(), &PingRequest{})
if err == nil {
t.Errorf("want err; got %v", err)
}
})
t.Run("Server streaming ping", func(t *testing.T) {
want := "hello, world"
stream, err := client.PingList(context.TODO(), &PingRequest{Value: want})
if err != nil {
t.Errorf("want no err; got %v", err)
if err := stream.CloseSend(); err != nil {
t.Fatalf("closing send channel: %v", err)
}
return
}
hdr, err := stream.Header()
if err != nil {
t.Errorf("reading headers: %v", err)
}
checkHeaders(t, hdr)
for {
res, err := stream.Recv()
if err != nil {
if err == io.EOF {
checkTrailers(t, stream.Trailer())
return
}
t.Errorf("want no err; got %v", err)
return
}
t.Logf("got %v (%d)", res.Value, res.Counter)
if got := res.Value; got != want {
t.Errorf("res.Value = %q; want %q", got, want)
}
}
})
t.Run("Bidirectional pinging", func(t *testing.T) {
want := "hello, world"
stream, err := client.PingStream(context.TODO())
if err != nil {
t.Errorf("want no err; got %v", err)
if err := stream.CloseSend(); err != nil {
t.Fatalf("closing send channel: %v", err)
}
return
}
d := make(chan struct{})
go func() {
hdr, err := stream.Header()
if err != nil {
t.Errorf("reading headers: %v", err)
}
checkHeaders(t, hdr)
close(d)
}()
for i := 0; i < 25; i++ {
if err := stream.Send(&PingRequest{Value: want}); err != nil {
t.Errorf("want no err; got %v", err)
return
}
res, err := stream.Recv()
if err != nil {
t.Errorf("receiving full duplex stream: %w", err)
return
}
t.Logf("got %v (%d)", res.Value, res.Counter)
if got := res.Value; got != want {
t.Errorf("res.Value = %q; want %q", got, want)
}
if got, want := res.Counter, int32(i); got != want {
t.Errorf("res.Counter = %d; want %d", got, want)
}
}
if err := stream.CloseSend(); err != nil {
t.Errorf("closing full duplex stream: %v", err)
}
<-d
})
t.Run("Unary ping with headers", func(t *testing.T) {
want := "hello, world"
req := &PingRequest{Value: want}
ctx := metadata.AppendToOutgoingContext(context.Background(), returnHeader, "I like turtles.")
inHeader := make(metadata.MD)
res, err := client.Ping(ctx, req, grpc.Header(&inHeader))
if err != nil {
t.Errorf("want no err; got %v", err)
return
}
t.Logf("got %v (%d)", res.Value, res.Counter)
if !reflect.DeepEqual(inHeader.Get(returnHeader), []string{"I like turtles."}) {
t.Errorf("did not receive correct return headers")
}
})
}
func checkTrailers(t *testing.T, md metadata.MD) {
vs := md.Get(PingTrailer)
if want, got := 1, len(vs); want != got {
t.Errorf("trailer %q not present", PingTrailer)
return
}
if want, got := []string{PingTrailerCts}, vs; !reflect.DeepEqual(got, want) {
t.Errorf("trailer mismatch; want %q, got %q", want, got)
}
}
func checkHeaders(t *testing.T, md metadata.MD) {
vs := md.Get(PingHeader)
if want, got := 1, len(vs); want != got {
t.Errorf("header %q not present", PingHeader)
return
}
if want, got := []string{PingHeaderCts}, vs; !reflect.DeepEqual(got, want) {
t.Errorf("header mismatch; want %q, got %q", want, got)
}
}