allow to catch response headers

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

example/example.proto

@@ -26,7 +26,7 @@ service Example {
         }
     };
 		option (micro.api.http) = { post: "/v1/example/call/{name}"; body: "*"; };
-		option (micro.api.micro_method) = { timeout: 5; };
+		option (micro.api.micro_method) = { timeout: "5s"; };
   };
 };
 

go.mod

@@ -4,7 +4,7 @@ go 1.16
 
 require (
 	github.com/fatih/structtag v1.2.0
-	go.unistack.org/micro-proto/v3 v3.2.7
+	go.unistack.org/micro-proto/v3 v3.3.1
 	golang.org/x/tools v0.1.10
-	google.golang.org/protobuf v1.27.1
+	google.golang.org/protobuf v1.28.1
 )

go.sum

@@ -39,8 +39,8 @@ github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw=
 github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
-github.com/google/gnostic v0.6.6 h1:MVSM2r2j9aRUvYNym66JGW96Ddd5MN4sTi59yktb6yk=
+github.com/google/gnostic v0.6.9 h1:ZK/5VhkoX835RikCHpSUJV9a+S3e1zLh59YnyWeBW+0=
-github.com/google/gnostic v0.6.6/go.mod h1:Nm8234We1lq6iB9OmlgNv3nH91XLLVZHCDayfA3xq+E=
+github.com/google/gnostic v0.6.9/go.mod h1:Nm8234We1lq6iB9OmlgNv3nH91XLLVZHCDayfA3xq+E=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
@@ -68,8 +68,8 @@ github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415/go.mod h1:
 github.com/xeipuuv/gojsonschema v1.2.0/go.mod h1:anYRn/JVcOK2ZgGU+IjEV4nwlhoK5sQluxsYJ78Id3Y=
 github.com/yuin/goldmark v1.4.1/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
-go.unistack.org/micro-proto/v3 v3.2.7 h1:zG6d69kHc+oij2lwQ3AfrCgdjiEVRG2A7TlsxjusWs4=
+go.unistack.org/micro-proto/v3 v3.3.1 h1:nQ0MtWvP2G3QrpOgawVOPhpZZYkq6umTGDqs8FxJYIo=
-go.unistack.org/micro-proto/v3 v3.2.7/go.mod h1:ZltVWNECD5yK+40+OCONzGw4OtmSdTpVi8/KFgo9dqM=
+go.unistack.org/micro-proto/v3 v3.3.1/go.mod h1:cwRyv8uInM2I7EbU7O8Fx2Ls3N90Uw9UCCcq4olOdfE=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
@@ -153,8 +153,9 @@ google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpAD
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
 google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+google.golang.org/protobuf v1.28.1 h1:d0NfwRgPtno5B1Wa6L2DAG+KivqkdutMf1UhdNx175w=
+google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

main.go

@@ -18,6 +18,7 @@ var (
 	flagComponents    = flagSet.String("components", "micro|rpc|http|client|server|openapiv3", "specify components to generate")
 	flagTagPath       = flagSet.String("tag_path", "", "tag rewriting dir")
 	flagOpenapiFile   = flagSet.String("openapi_file", "apidocs.swagger.json", "openapi file name")
+	flagReflection    = flagSet.Bool("reflection", false, "enable server reflection support")
 	flagHelp          = flagSet.Bool("help", false, "display help message")
 )
 
@@ -45,6 +46,7 @@ type Generator struct {
 	fieldaligment bool
 	tagPath       string
 	openapiFile   string
+	reflection    bool
 	plugin        *protogen.Plugin
 }
 
@@ -58,6 +60,7 @@ func (g *Generator) Generate(plugin *protogen.Plugin) error {
 	g.fieldaligment = *flagFieldaligment
 	g.tagPath = *flagTagPath
 	g.openapiFile = *flagOpenapiFile
+	g.reflection = *flagReflection
 	plugin.SupportedFeatures = uint64(pluginpb.CodeGeneratorResponse_FEATURE_PROTO3_OPTIONAL)
 
 	var genClient bool

micro.go

@@ -1,6 +1,8 @@
 package main
 
 import (
+	"fmt"
+
 	"google.golang.org/protobuf/compiler/protogen"
 )
 
@@ -22,8 +24,10 @@ func (g *Generator) microGenerate(component string, plugin *protogen.Plugin, gen
 		gfile := plugin.NewGeneratedFile(gname, path)
 
 		gfile.P("// Code generated by protoc-gen-go-micro. DO NOT EDIT.")
-		gfile.P("// protoc-gen-go-micro version: " + versionComment)
+		gfile.P("// versions:")
-		gfile.P("// source: ", file.Proto.GetName())
+		gfile.P("// - protoc-gen-go-micro " + versionComment)
+		gfile.P("// - protoc              ", protocVersion(plugin))
+		gfile.P("// source: ", file.Desc.Path())
 		gfile.P()
 		gfile.P("package ", file.GoPackageName)
 		gfile.P()
@@ -50,3 +54,15 @@ func (g *Generator) microGenerate(component string, plugin *protogen.Plugin, gen
 
 	return nil
 }
+
+func protocVersion(plugin *protogen.Plugin) string {
+	v := plugin.Request.GetCompilerVersion()
+	if v == nil {
+		return "(unknown)"
+	}
+	var suffix string
+	if s := v.GetSuffix(); s != "" {
+		suffix = "-" + s
+	}
+	return fmt.Sprintf("v%d.%d.%d%s", v.GetMajor(), v.GetMinor(), v.GetPatch(), suffix)
+}

rpc.go

@@ -45,6 +45,9 @@ func (g *Generator) rpcGenerate(component string, plugin *protogen.Plugin, genCl
 				g.generateServiceServerMethods(gfile, service)
 				g.generateServiceRegister(gfile, service)
 			}
+			if component == "grpc" && g.reflection {
+				g.generateServiceDesc(gfile, file, service)
+			}
 		}
 	}
 

util.go

@@ -4,7 +4,9 @@ import (
 	"fmt"
 	"log"
 	"net/http"
+	"strconv"
 	"strings"
+	"time"
 
 	api_options "go.unistack.org/micro-proto/v3/api"
 	v2 "go.unistack.org/micro-proto/v3/openapiv2"
@@ -213,8 +215,14 @@ func (g *Generator) generateServiceClientMethods(gfile *protogen.GeneratedFile,
 		}
 
 		if rule, ok := getMicroApiMethod(method); ok {
-			if rule.Timeout > 0 {
+			if rule.Timeout != "" {
-				gfile.P("opts = append(opts, ", microClientPackage.Ident("WithRequestTimeout"), "(", timePackage.Ident("Second"), "*", rule.Timeout, "))")
+				td, err := time.ParseDuration(rule.Timeout)
+				if err != nil {
+					log.Printf("parse duration error %s\n", err.Error())
+				} else {
+					gfile.P("td := uint64(", td.Nanoseconds(), ")")
+					gfile.P("opts = append(opts, ", microClientPackage.Ident("WithRequestTimeout"), "(", timePackage.Ident("Nanosecond"), "* ", "td", "))")
+				}
 			}
 		}
 
@@ -287,6 +295,11 @@ func (g *Generator) generateServiceClientMethods(gfile *protogen.GeneratedFile,
 		gfile.P()
 
 		if method.Desc.IsStreamingClient() {
+			gfile.P("func (s *", unexport(serviceName), "Client", method.GoName, ") Header() ", microMetadataPackage.Ident("Metadata"), "{")
+			gfile.P("return s.stream.Response().Header()")
+			gfile.P("}")
+			gfile.P()
+
 			gfile.P("func (s *", unexport(serviceName), "Client", method.GoName, ") Send(msg *", gfile.QualifiedGoIdent(method.Input.GoIdent), ") error {")
 			gfile.P("return s.stream.Send(msg)")
 			gfile.P("}")
@@ -319,10 +332,16 @@ func (g *Generator) generateServiceServerMethods(gfile *protogen.GeneratedFile,
 	for _, method := range service.Methods {
 		generateServerFuncSignature(gfile, serviceName, method, true)
 		if rule, ok := getMicroApiMethod(method); ok {
-			if rule.Timeout > 0 {
+			if rule.Timeout != "" {
-				gfile.P("var cancel ", contextPackage.Ident("CancelFunc"))
+				td, err := time.ParseDuration(rule.Timeout)
-				gfile.P("ctx, cancel = ", contextPackage.Ident("WithTimeout"), "(ctx, ", timePackage.Ident("Second"), "*", rule.Timeout, ")")
+				if err != nil {
-				gfile.P("defer cancel()")
+					log.Printf("parse duration error %s\n", err.Error())
+				} else {
+					gfile.P("var cancel ", contextPackage.Ident("CancelFunc"))
+					gfile.P("td := ", timePackage.Ident("Duration"), "(", td.Nanoseconds(), ")")
+					gfile.P("ctx, cancel = ", contextPackage.Ident("WithTimeout"), "(ctx, ", "td", ")")
+					gfile.P("defer cancel()")
+				}
 			}
 		}
 		if method.Desc.IsStreamingClient() || method.Desc.IsStreamingServer() {
@@ -598,6 +617,7 @@ func (g *Generator) generateServiceClientStreamInterface(gfile *protogen.Generat
 		}
 		gfile.P("Close() error")
 		if method.Desc.IsStreamingClient() {
+			gfile.P("Header() ", microMetadataPackage.Ident("Metadata"))
 			gfile.P("Send(msg *", gfile.QualifiedGoIdent(method.Input.GoIdent), ") error")
 		}
 		if method.Desc.IsStreamingServer() {
@@ -798,3 +818,45 @@ func getGoIdentByMessage(messages []*protogen.Message, msg string) (protogen.GoI
 	}
 	return protogen.GoIdent{}, fmt.Errorf("not found")
 }
+
+func (g *Generator) generateServiceDesc(gfile *protogen.GeneratedFile, file *protogen.File, service *protogen.Service) {
+	serviceName := service.GoName
+
+	gfile.P("// ", serviceName, "_ServiceDesc", " is the ", grpcPackage.Ident("ServiceDesc"), " for ", serviceName, " service.")
+	gfile.P("// It's only intended for direct use with ", grpcPackage.Ident("RegisterService"), ",")
+	gfile.P("// and not to be introspected or modified (even as a copy)")
+	gfile.P("var ", serviceName, "_ServiceDesc", " = ", grpcPackage.Ident("ServiceDesc"), " {")
+	gfile.P("ServiceName: ", strconv.Quote(string(service.Desc.FullName())), ",")
+	gfile.P("HandlerType: (*", serviceName, "Server)(nil),")
+	gfile.P("Methods: []", grpcPackage.Ident("MethodDesc"), "{")
+	for _, method := range service.Methods {
+		if method.Desc.IsStreamingClient() || method.Desc.IsStreamingServer() {
+			continue
+		}
+		gfile.P("{")
+		gfile.P("MethodName: ", strconv.Quote(string(method.Desc.Name())), ",")
+		gfile.P("Handler: ", method.GoName, ",")
+		gfile.P("},")
+	}
+	gfile.P("},")
+	gfile.P("Streams: []", grpcPackage.Ident("StreamDesc"), "{")
+	for _, method := range service.Methods {
+		if !method.Desc.IsStreamingClient() && !method.Desc.IsStreamingServer() {
+			continue
+		}
+		gfile.P("{")
+		gfile.P("StreamName: ", strconv.Quote(string(method.Desc.Name())), ",")
+		gfile.P("Handler: ", method.GoName, ",")
+		if method.Desc.IsStreamingServer() {
+			gfile.P("ServerStreams: true,")
+		}
+		if method.Desc.IsStreamingClient() {
+			gfile.P("ClientStreams: true,")
+		}
+		gfile.P("},")
+	}
+	gfile.P("},")
+	gfile.P("Metadata: \"", file.Desc.Path(), "\",")
+	gfile.P("}")
+	gfile.P()
+}

variables.go

@@ -12,12 +12,14 @@ var (
 	chiPackage             = protogen.GoImportPath("github.com/go-chi/chi/v5")
 	chiMiddlewarePackage   = protogen.GoImportPath("github.com/go-chi/chi/v5/middleware")
 	microApiPackage        = protogen.GoImportPath("go.unistack.org/micro/v3/api")
+	microMetadataPackage   = protogen.GoImportPath("go.unistack.org/micro/v3/metadata")
 	microClientPackage     = protogen.GoImportPath("go.unistack.org/micro/v3/client")
 	microServerPackage     = protogen.GoImportPath("go.unistack.org/micro/v3/server")
 	microClientHttpPackage = protogen.GoImportPath("go.unistack.org/micro-client-http/v3")
 	microServerHttpPackage = protogen.GoImportPath("go.unistack.org/micro-server-http/v3")
 	microCodecPackage      = protogen.GoImportPath("go.unistack.org/micro/v3/codec")
 	microErrorsPackage     = protogen.GoImportPath("go.unistack.org/micro/v3/errors")
+	grpcPackage            = protogen.GoImportPath("google.golang.org/grpc")
 	timePackage            = protogen.GoImportPath("time")
 	deprecationComment     = "// Deprecated: Do not use."
 	versionComment         = "v3.5.3"