From 84040af9a25c7a8d52206d899e0ebcb27d39e20b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Dawid=20Wysoki=C5=84ski?= Date: Tue, 2 May 2023 09:19:35 +0200 Subject: [PATCH] init --- .gitignore | 25 +++++++ .golangci.yml | 119 +++++++++++++++++++++++++++++++ cmd/client/main.go | 153 ++++++++++++++++++++++++++++++++++++++++ cmd/internal/zap.go | 16 +++++ cmd/server/main.go | 149 ++++++++++++++++++++++++++++++++++++++ go.mod | 21 ++++++ go.sum | 143 +++++++++++++++++++++++++++++++++++++ proto/.gitignore | 1 + proto/hello_world.proto | 16 +++++ proto/proto.go | 3 + 10 files changed, 646 insertions(+) create mode 100644 .gitignore create mode 100644 .golangci.yml create mode 100644 cmd/client/main.go create mode 100644 cmd/internal/zap.go create mode 100644 cmd/server/main.go create mode 100644 go.mod create mode 100644 go.sum create mode 100644 proto/.gitignore create mode 100644 proto/hello_world.proto create mode 100644 proto/proto.go diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..923d5eb --- /dev/null +++ b/.gitignore @@ -0,0 +1,25 @@ +# ---> Go +# If you prefer the allow list template instead of the deny list, see community template: +# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore +# +# Binaries for programs and plugins +*.exe +*.exe~ +*.dll +*.so +*.dylib + +# Test binary, built with `go test -c` +*.test + +# Output of the go coverage tool, specifically when used with LiteIDE +*.out + +# Dependency directories (remove the comment below to include it) +# vendor/ + +# Go workspace file +go.work + +.idea +bin diff --git a/.golangci.yml b/.golangci.yml new file mode 100644 index 0000000..5f5c74c --- /dev/null +++ b/.golangci.yml @@ -0,0 +1,119 @@ +run: + tests: true + timeout: 5m + +linters: + disable-all: true + enable: + - asasalint + - asciicheck + - bodyclose + - bidichk + - exportloopref + - depguard + - errcheck + - gocritic + - gosec + - gofmt + - goimports + - gosimple + - govet + - ineffassign + - misspell + - nakedret + - prealloc + - staticcheck + - typecheck + - unconvert + - unused + - lll + - nestif + - thelper + - nonamedreturns + - gocyclo + - gomnd + - tenv + - testpackage + - noctx + - tparallel + - usestdlibvars + - unconvert + - makezero + - grouper + - errname + - exhaustive + - tagliatelle + - contextcheck + - gocheckcompilerdirectives + - errname + - forcetypeassert + - durationcheck + - predeclared + - promlinter + - unparam + - wastedassign + - revive + +linters-settings: + tagliatelle: + case: + rules: + json: camel + lll: + line-length: 150 + gocyclo: + min-complexity: 10 + govet: + enable: + - asmdecl + - assign + - atomic + - atomicalign + - bools + - buildtag + - cgocall + - composites + - copylocks + - deepequalerrors + - errorsas + - findcall + - framepointer + - httpresponse + - ifaceassert + - loopclosure + - lostcancel + - nilfunc + - nilness + - printf + - reflectvaluecompare + - shadow + - shift + - sigchanyzer + - sortslice + - stdmethods + - stringintconv + - structtag + - testinggoroutine + - tests + - unmarshal + - unreachable + - unsafeptr + - unusedresult + - unusedwrite + gomnd: + ignored-functions: + - strconv.FormatInt + - strconv.ParseInt + nakedret: + max-func-lines: 1 + +issues: + exclude-rules: + # Exclude some linters from running on tests files. + - path: _test\.go + linters: + - dupl + - gocyclo + - linters: + - lll + source: "^//go:generate " diff --git a/cmd/client/main.go b/cmd/client/main.go new file mode 100644 index 0000000..5e8134c --- /dev/null +++ b/cmd/client/main.go @@ -0,0 +1,153 @@ +package main + +import ( + "context" + "errors" + "flag" + "fmt" + "io" + "log" + "os" + "os/signal" + "sync" + "syscall" + "time" + + "gitea.dwysokinski.me/Kichiyaki/grpc-g2a/cmd/internal" + "gitea.dwysokinski.me/Kichiyaki/grpc-g2a/proto" + "github.com/google/uuid" + "go.uber.org/zap" + "google.golang.org/grpc" + "google.golang.org/grpc/credentials/insecure" +) + +const defaultAddress = "localhost:50001" + +const ( + exampleUnary = "unary" + exampleBidirectional = "bidirectional" +) + +func main() { + logger, err := internal.NewLogger() + if err != nil { + log.Fatalln(err) + } + defer func() { + _ = logger.Sync() + }() + + example := "" + flag.StringVar( + &example, + "example", + exampleUnary, + fmt.Sprintf("%s or %s (default: %s)", exampleUnary, exampleBidirectional, exampleUnary), + ) + flag.Parse() + + conn, err := newConn() + if err != nil { + logger.Fatal("couldn't connect to grpc server", zap.Error(err), zap.String("address", defaultAddress)) + } + defer func() { + _ = conn.Close() + }() + + client := proto.NewGreeterClient(conn) + + ctx, stop := signal.NotifyContext( + context.Background(), + os.Interrupt, + syscall.SIGTERM, + syscall.SIGQUIT, + ) + defer stop() + + switch example { + case exampleUnary: + sayHello(ctx, client, logger) + case exampleBidirectional: + sayHelloBidirectional(ctx, client, logger) + default: + logger.Fatal("example doesn't exist", zap.String("example", example)) + } +} + +func newConn() (*grpc.ClientConn, error) { + return grpc.Dial( + "localhost:50001", + grpc.WithTransportCredentials(insecure.NewCredentials()), + grpc.WithBlock(), + ) +} + +func sayHello(ctx context.Context, client proto.GreeterClient, logger *zap.Logger) { + reply, err := client.SayHello(ctx, &proto.HelloRequest{Name: uuid.NewString()}) + if err != nil { + logger.Fatal("something went wrong while calling SayHello", zap.Error(err)) + } + logger.Info("reply received", zap.String("message", reply.GetMessage())) +} + +func sayHelloBidirectional(ctx context.Context, client proto.GreeterClient, logger *zap.Logger) { + //nolint:contextcheck + streamClient, err := client.SayHelloBidirectionalStream(context.Background()) + if err != nil { + logger.Fatal("something went wrong while calling SayHelloBidirectionalStream", zap.Error(err)) + } + // streamClient is closed later in the 2nd goroutine + + var wg sync.WaitGroup + + wg.Add(1) + go func() { + defer wg.Done() + + for { + reply, err := streamClient.Recv() + if errors.Is(err, io.EOF) { + return + } + if err != nil { + logger.Warn("couldn't receive reply", zap.Error(err)) + return + } + logger.Info("reply received", zap.String("message", reply.GetMessage())) + } + }() + + wg.Add(1) + go func() { + defer wg.Done() + + ticker := time.NewTicker(time.Second) + defer func() { + ticker.Stop() + }() + + for { + select { + case <-ticker.C: + name := uuid.NewString() + err := streamClient.Send(&proto.HelloRequest{ + Name: name, + }) + if err != nil { + logger.Warn("couldn't send request", zap.Error(err)) + } else { + logger.Info("request sent", zap.String("name", name)) + } + case <-ctx.Done(): + if err := streamClient.CloseSend(); err != nil { + logger.Warn("couldn't close stream", zap.Error(err)) + } else { + logger.Info("stream client closed") + } + return + } + } + }() + + wg.Wait() +} diff --git a/cmd/internal/zap.go b/cmd/internal/zap.go new file mode 100644 index 0000000..03f6974 --- /dev/null +++ b/cmd/internal/zap.go @@ -0,0 +1,16 @@ +package internal + +import ( + "go.uber.org/zap" +) + +func NewLogger() (*zap.Logger, error) { + logger, err := zap.NewDevelopment() + if err != nil { + return nil, err + } + + zap.ReplaceGlobals(logger) + + return logger, nil +} diff --git a/cmd/server/main.go b/cmd/server/main.go new file mode 100644 index 0000000..948710a --- /dev/null +++ b/cmd/server/main.go @@ -0,0 +1,149 @@ +package main + +import ( + "context" + "errors" + "fmt" + "io" + "log" + "net" + "os" + "os/signal" + "syscall" + + "gitea.dwysokinski.me/Kichiyaki/grpc-g2a/cmd/internal" + "gitea.dwysokinski.me/Kichiyaki/grpc-g2a/proto" + grpc_zap "github.com/grpc-ecosystem/go-grpc-middleware/logging/zap" + grpc_recovery "github.com/grpc-ecosystem/go-grpc-middleware/recovery" + grpc_ctxtags "github.com/grpc-ecosystem/go-grpc-middleware/tags" + "go.uber.org/zap" + "google.golang.org/grpc" + "google.golang.org/grpc/codes" + "google.golang.org/grpc/status" +) + +const defaultAddress = "localhost:50001" + +func main() { + logger, err := internal.NewLogger() + if err != nil { + log.Fatalln(err) + } + defer func() { + _ = logger.Sync() + }() + + srv, err := newServer(defaultAddress, logger) + if err != nil { + logger.Fatal("couldn't initialize server", zap.Error(err)) + } + + go func(srv *server, logger *zap.Logger) { + ctx, stop := signal.NotifyContext( + context.Background(), + os.Interrupt, + syscall.SIGTERM, + syscall.SIGQUIT, + ) + defer stop() + + <-ctx.Done() + + logger.Info("shutdown signal received") + + srv.GracefulStop() + }(srv, logger) + + logger.Info( + "listening and serving", + zap.String("address", srv.lis.Addr().String()), + ) + + if err = srv.Serve(); err != nil { + logger.Fatal("something went wrong while serving", zap.Error(err)) + } + + logger.Info("shutdown completed") +} + +type server struct { + lis net.Listener + grpcSrv *grpc.Server +} + +func newServer(address string, logger *zap.Logger) (*server, error) { + lis, err := net.Listen("tcp", address) + if err != nil { + return nil, err + } + + grpc_zap.ReplaceGrpcLoggerV2(logger) + + srv := grpc.NewServer( + grpc.ChainUnaryInterceptor( + grpc_recovery.UnaryServerInterceptor(grpc_recovery.WithRecoveryHandler(createPanicHandler(logger))), + grpc_ctxtags.UnaryServerInterceptor(grpc_ctxtags.WithFieldExtractor(grpc_ctxtags.CodeGenRequestFieldExtractor)), + grpc_zap.UnaryServerInterceptor(logger), + ), + grpc.ChainStreamInterceptor( + grpc_recovery.StreamServerInterceptor(grpc_recovery.WithRecoveryHandler(createPanicHandler(logger))), + grpc_ctxtags.StreamServerInterceptor(grpc_ctxtags.WithFieldExtractor(grpc_ctxtags.CodeGenRequestFieldExtractor)), + grpc_zap.StreamServerInterceptor(logger), + ), + ) + + proto.RegisterGreeterServer(srv, &greeterServer{}) + + return &server{ + lis: lis, + grpcSrv: srv, + }, nil +} + +func (s *server) Serve() error { + return s.grpcSrv.Serve(s.lis) +} + +func (s *server) GracefulStop() { + // GracefulStop also closes the listener. + s.grpcSrv.GracefulStop() +} + +func createPanicHandler(logger *zap.Logger) grpc_recovery.RecoveryHandlerFunc { + return func(p interface{}) error { + logger.Panic(fmt.Sprintf("%v", p), zap.Stack("stack")) + return status.Errorf(codes.Internal, "internal server error") + } +} + +type greeterServer struct { + proto.UnimplementedGreeterServer +} + +var _ proto.GreeterServer = (*greeterServer)(nil) + +func (g *greeterServer) SayHello(_ context.Context, r *proto.HelloRequest) (*proto.HelloReply, error) { + return &proto.HelloReply{ + Message: buildHelloMsg(r.GetName()), + }, nil +} + +func (g *greeterServer) SayHelloBidirectionalStream(stream proto.Greeter_SayHelloBidirectionalStreamServer) error { + for { + r, err := stream.Recv() + if errors.Is(err, io.EOF) { + return nil + } + if err != nil { + return fmt.Errorf("stream returned error: %w", err) + } + + if err = stream.Send(&proto.HelloReply{Message: buildHelloMsg(r.GetName())}); err != nil { + return fmt.Errorf("couldn't send reply: %w", err) + } + } +} + +func buildHelloMsg(name string) string { + return "Hello " + name +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..58bee69 --- /dev/null +++ b/go.mod @@ -0,0 +1,21 @@ +module gitea.dwysokinski.me/Kichiyaki/grpc-g2a + +go 1.20 + +require ( + github.com/google/uuid v1.3.0 + github.com/grpc-ecosystem/go-grpc-middleware v1.4.0 + go.uber.org/zap v1.24.0 + google.golang.org/grpc v1.54.0 + google.golang.org/protobuf v1.30.0 +) + +require ( + github.com/golang/protobuf v1.5.2 // indirect + go.uber.org/atomic v1.7.0 // indirect + go.uber.org/multierr v1.6.0 // indirect + golang.org/x/net v0.8.0 // indirect + golang.org/x/sys v0.6.0 // indirect + golang.org/x/text v0.8.0 // indirect + google.golang.org/genproto v0.0.0-20230110181048-76db0878b65f // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..3b44454 --- /dev/null +++ b/go.sum @@ -0,0 +1,143 @@ +cloud.google.com/go v0.26.0/go.mod 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-0,0 +1 @@ +*.pb.go diff --git a/proto/hello_world.proto b/proto/hello_world.proto new file mode 100644 index 0000000..55357c4 --- /dev/null +++ b/proto/hello_world.proto @@ -0,0 +1,16 @@ +syntax = "proto3"; + +option go_package = "gitea.dwysokinski.me/Kichiyaki/grpc-g2a/proto"; + +service Greeter { + rpc SayHello (HelloRequest) returns (HelloReply) {} + rpc SayHelloBidirectionalStream (stream HelloRequest) returns (stream HelloReply) {} +} + +message HelloRequest { + string name = 1; +} + +message HelloReply { + string message = 1; +} diff --git a/proto/proto.go b/proto/proto.go new file mode 100644 index 0000000..f929309 --- /dev/null +++ b/proto/proto.go @@ -0,0 +1,3 @@ +package proto + +//go:generate protoc --go_out=. --go_opt=paths=source_relative --go-grpc_out=. --go-grpc_opt=paths=source_relative hello_world.proto