add goa examples

go/goa_example/gen/grpc/service1/server/encode_decode.go

@@ -0,0 +1,109 @@
+// Code generated by goa v3.6.0, DO NOT EDIT.
+//
+// Service1 gRPC server encoders and decoders
+//
+// Command:
+// $ goa gen goa_example/design
+
+package server
+
+import (
+	"context"
+	service1pb "goa_example/gen/grpc/service1/pb"
+	service1 "goa_example/gen/service1"
+	"strings"
+
+	goagrpc "goa.design/goa/v3/grpc"
+	goa "goa.design/goa/v3/pkg"
+	"google.golang.org/grpc/metadata"
+)
+
+// EncodeSigninResponse encodes responses from the "Service1" service "signin"
+// endpoint.
+func EncodeSigninResponse(ctx context.Context, v interface{}, hdr, trlr *metadata.MD) (interface{}, error) {
+	result, ok := v.(*service1.Creds)
+	if !ok {
+		return nil, goagrpc.ErrInvalidType("Service1", "signin", "*service1.Creds", v)
+	}
+	resp := NewSigninResponse(result)
+	return resp, nil
+}
+
+// DecodeSigninRequest decodes requests sent to "Service1" service "signin"
+// endpoint.
+func DecodeSigninRequest(ctx context.Context, v interface{}, md metadata.MD) (interface{}, error) {
+	var (
+		username string
+		password string
+		err      error
+	)
+	{
+		if vals := md.Get("username"); len(vals) == 0 {
+			err = goa.MergeErrors(err, goa.MissingFieldError("username", "metadata"))
+		} else {
+			username = vals[0]
+		}
+		if vals := md.Get("password"); len(vals) == 0 {
+			err = goa.MergeErrors(err, goa.MissingFieldError("password", "metadata"))
+		} else {
+			password = vals[0]
+		}
+	}
+	if err != nil {
+		return nil, err
+	}
+	var payload *service1.SigninPayload
+	{
+		payload = NewSigninPayload(username, password)
+	}
+	return payload, nil
+}
+
+// EncodeSecureResponse encodes responses from the "Service1" service "secure"
+// endpoint.
+func EncodeSecureResponse(ctx context.Context, v interface{}, hdr, trlr *metadata.MD) (interface{}, error) {
+	result, ok := v.(string)
+	if !ok {
+		return nil, goagrpc.ErrInvalidType("Service1", "secure", "string", v)
+	}
+	resp := NewSecureResponse(result)
+	return resp, nil
+}
+
+// DecodeSecureRequest decodes requests sent to "Service1" service "secure"
+// endpoint.
+func DecodeSecureRequest(ctx context.Context, v interface{}, md metadata.MD) (interface{}, error) {
+	var (
+		token string
+		err   error
+	)
+	{
+		if vals := md.Get("authorization"); len(vals) == 0 {
+			err = goa.MergeErrors(err, goa.MissingFieldError("authorization", "metadata"))
+		} else {
+			token = vals[0]
+		}
+	}
+	if err != nil {
+		return nil, err
+	}
+	var (
+		message *service1pb.SecureRequest
+		ok      bool
+	)
+	{
+		if message, ok = v.(*service1pb.SecureRequest); !ok {
+			return nil, goagrpc.ErrInvalidType("Service1", "secure", "*service1pb.SecureRequest", v)
+		}
+	}
+	var payload *service1.SecurePayload
+	{
+		payload = NewSecurePayload(message, token)
+		if strings.Contains(payload.Token, " ") {
+			// Remove authorization scheme prefix (e.g. "Bearer")
+			cred := strings.SplitN(payload.Token, " ", 2)[1]
+			payload.Token = cred
+		}
+	}
+	return payload, nil
+}

go/goa_example/gen/grpc/service1/server/server.go

@@ -0,0 +1,94 @@
+// Code generated by goa v3.6.0, DO NOT EDIT.
+//
+// Service1 gRPC server
+//
+// Command:
+// $ goa gen goa_example/design
+
+package server
+
+import (
+	"context"
+	"errors"
+	service1pb "goa_example/gen/grpc/service1/pb"
+	service1 "goa_example/gen/service1"
+
+	goagrpc "goa.design/goa/v3/grpc"
+	goa "goa.design/goa/v3/pkg"
+	"google.golang.org/grpc/codes"
+)
+
+// Server implements the service1pb.Service1Server interface.
+type Server struct {
+	SigninH goagrpc.UnaryHandler
+	SecureH goagrpc.UnaryHandler
+	service1pb.UnimplementedService1Server
+}
+
+// ErrorNamer is an interface implemented by generated error structs that
+// exposes the name of the error as defined in the expr.
+type ErrorNamer interface {
+	ErrorName() string
+}
+
+// New instantiates the server struct with the Service1 service endpoints.
+func New(e *service1.Endpoints, uh goagrpc.UnaryHandler) *Server {
+	return &Server{
+		SigninH: NewSigninHandler(e.Signin, uh),
+		SecureH: NewSecureHandler(e.Secure, uh),
+	}
+}
+
+// NewSigninHandler creates a gRPC handler which serves the "Service1" service
+// "signin" endpoint.
+func NewSigninHandler(endpoint goa.Endpoint, h goagrpc.UnaryHandler) goagrpc.UnaryHandler {
+	if h == nil {
+		h = goagrpc.NewUnaryHandler(endpoint, DecodeSigninRequest, EncodeSigninResponse)
+	}
+	return h
+}
+
+// Signin implements the "Signin" method in service1pb.Service1Server interface.
+func (s *Server) Signin(ctx context.Context, message *service1pb.SigninRequest) (*service1pb.SigninResponse, error) {
+	ctx = context.WithValue(ctx, goa.MethodKey, "signin")
+	ctx = context.WithValue(ctx, goa.ServiceKey, "Service1")
+	resp, err := s.SigninH.Handle(ctx, message)
+	if err != nil {
+		var en ErrorNamer
+		if errors.As(err, &en) {
+			switch en.ErrorName() {
+			case "unauthorized":
+				return nil, goagrpc.NewStatusError(codes.Unauthenticated, err, goagrpc.NewErrorResponse(err))
+			}
+		}
+		return nil, goagrpc.EncodeError(err)
+	}
+	return resp.(*service1pb.SigninResponse), nil
+}
+
+// NewSecureHandler creates a gRPC handler which serves the "Service1" service
+// "secure" endpoint.
+func NewSecureHandler(endpoint goa.Endpoint, h goagrpc.UnaryHandler) goagrpc.UnaryHandler {
+	if h == nil {
+		h = goagrpc.NewUnaryHandler(endpoint, DecodeSecureRequest, EncodeSecureResponse)
+	}
+	return h
+}
+
+// Secure implements the "Secure" method in service1pb.Service1Server interface.
+func (s *Server) Secure(ctx context.Context, message *service1pb.SecureRequest) (*service1pb.SecureResponse, error) {
+	ctx = context.WithValue(ctx, goa.MethodKey, "secure")
+	ctx = context.WithValue(ctx, goa.ServiceKey, "Service1")
+	resp, err := s.SecureH.Handle(ctx, message)
+	if err != nil {
+		var en ErrorNamer
+		if errors.As(err, &en) {
+			switch en.ErrorName() {
+			case "unauthorized":
+				return nil, goagrpc.NewStatusError(codes.Unauthenticated, err, goagrpc.NewErrorResponse(err))
+			}
+		}
+		return nil, goagrpc.EncodeError(err)
+	}
+	return resp.(*service1pb.SecureResponse), nil
+}

go/goa_example/gen/grpc/service1/server/types.go

@@ -0,0 +1,51 @@
+// Code generated by goa v3.6.0, DO NOT EDIT.
+//
+// Service1 gRPC server types
+//
+// Command:
+// $ goa gen goa_example/design
+
+package server
+
+import (
+	service1pb "goa_example/gen/grpc/service1/pb"
+	service1 "goa_example/gen/service1"
+)
+
+// NewSigninPayload builds the payload of the "signin" endpoint of the
+// "Service1" service from the gRPC request type.
+func NewSigninPayload(username string, password string) *service1.SigninPayload {
+	v := &service1.SigninPayload{}
+	v.Username = username
+	v.Password = password
+	return v
+}
+
+// NewSigninResponse builds the gRPC response type from the result of the
+// "signin" endpoint of the "Service1" service.
+func NewSigninResponse(result *service1.Creds) *service1pb.SigninResponse {
+	message := &service1pb.SigninResponse{
+		Jwt:        result.JWT,
+		ApiKey:     result.APIKey,
+		OauthToken: result.OauthToken,
+	}
+	return message
+}
+
+// NewSecurePayload builds the payload of the "secure" endpoint of the
+// "Service1" service from the gRPC request type.
+func NewSecurePayload(message *service1pb.SecureRequest, token string) *service1.SecurePayload {
+	v := &service1.SecurePayload{
+		Fail: &message.Fail,
+	}
+	v.Token = token
+	return v
+}
+
+// NewSecureResponse builds the gRPC response type from the result of the
+// "secure" endpoint of the "Service1" service.
+func NewSecureResponse(result string) *service1pb.SecureResponse {
+	message := &service1pb.SecureResponse{}
+	message.Field = result
+	return message
+}