暂存

2 years ago · 3cd4f8126f
parent dcae38d656
commit 3cd4f8126f
16 changed files with 840 additions and 6 deletions
--- a/.fleet/settings.json
+++ b/.fleet/settings.json
--- a/cmd/proto-gen-go-broker/broker.go
+++ b/cmd/proto-gen-go-broker/broker.go
@ -0,0 +1,316 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+	"regexp"
+	"strings"
+
+	"google.golang.org/protobuf/reflect/protoreflect"
+
+	"google.golang.org/genproto/googleapis/api/annotations"
+	"google.golang.org/protobuf/compiler/protogen"
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/types/descriptorpb"
+)
+
+const (
+	contextPackage       = protogen.GoImportPath("context")
+	transportHTTPPackage = protogen.GoImportPath("github.com/go-kratos/kratos/v2/transport/http")
+	bindingPackage       = protogen.GoImportPath("github.com/go-kratos/kratos/v2/transport/http/binding")
+)
+
+var methodSets = make(map[string]int)
+
+// generateFile generates a _http.pb.go file containing kratos errors definitions.
+func generateFile(gen *protogen.Plugin, file *protogen.File, omitempty bool) *protogen.GeneratedFile {
+	if len(file.Services) == 0 || (omitempty && !hasHTTPRule(file.Services)) {
+		return nil
+	}
+	filename := file.GeneratedFilenamePrefix + "_broker.pb.go"
+	g := gen.NewGeneratedFile(filename, file.GoImportPath)
+	g.P("// Code generated by protoc-gen-go-broker. DO NOT EDIT.")
+	g.P("// versions:")
+	g.P(fmt.Sprintf("// - protoc-gen-go-broker %s", release))
+	g.P("// - protoc             ", protocVersion(gen))
+	if file.Proto.GetOptions().GetDeprecated() {
+		g.P("// ", file.Desc.Path(), " is a deprecated file.")
+	} else {
+		g.P("// source: ", file.Desc.Path())
+	}
+	g.P()
+	g.P("package ", file.GoPackageName)
+	g.P()
+	generateFileContent(gen, file, g, omitempty)
+	return g
+}
+
+// generateFileContent generates the kratos errors definitions, excluding the package statement.
+func generateFileContent(gen *protogen.Plugin, file *protogen.File, g *protogen.GeneratedFile, omitempty bool) {
+	if len(file.Services) == 0 {
+		return
+	}
+	for _, service := range file.Services {
+		genService(gen, file, g, service, omitempty)
+	}
+}
+
+func genService(gen *protogen.Plugin, file *protogen.File, g *protogen.GeneratedFile, service *protogen.Service, omitempty bool) {
+	if service.Desc.Options().(*descriptorpb.ServiceOptions).GetDeprecated() {
+		g.P("//")
+		g.P(deprecationComment)
+	}
+	// HTTP Server.
+	sd := &serviceDesc{
+		ServiceType: service.GoName,
+		ServiceName: string(service.Desc.FullName()),
+		Metadata:    file.Desc.Path(),
+	}
+	for _, method := range service.Methods {
+		if method.Desc.IsStreamingClient() || method.Desc.IsStreamingServer() {
+			continue
+		}
+		rule, ok := proto.GetExtension(method.Desc.Options(), annotations.E_Http).(*annotations.HttpRule)
+		if rule != nil && ok {
+			for _, bind := range rule.AdditionalBindings {
+				sd.Methods = append(sd.Methods, buildHTTPRule(g, method, bind))
+			}
+			sd.Methods = append(sd.Methods, buildHTTPRule(g, method, rule))
+		} else if !omitempty {
+			path := fmt.Sprintf("/%s/%s", service.Desc.FullName(), method.Desc.Name())
+			sd.Methods = append(sd.Methods, buildMethodDesc(g, method, http.MethodPost, path))
+		}
+	}
+	if len(sd.Methods) != 0 {
+		g.P(sd.execute())
+	}
+}
+
+func hasHTTPRule(services []*protogen.Service) bool {
+	for _, service := range services {
+		for _, method := range service.Methods {
+			if method.Desc.IsStreamingClient() || method.Desc.IsStreamingServer() {
+				continue
+			}
+			rule, ok := proto.GetExtension(method.Desc.Options(), annotations.E_Http).(*annotations.HttpRule)
+			if rule != nil && ok {
+				return true
+			}
+		}
+	}
+	return false
+}
+
+func buildHTTPRule(g *protogen.GeneratedFile, m *protogen.Method, rule *annotations.HttpRule) *methodDesc {
+	var (
+		path         string
+		method       string
+		body         string
+		responseBody string
+	)
+
+	switch pattern := rule.Pattern.(type) {
+	case *annotations.HttpRule_Get:
+		path = pattern.Get
+		method = http.MethodGet
+	case *annotations.HttpRule_Put:
+		path = pattern.Put
+		method = http.MethodPut
+	case *annotations.HttpRule_Post:
+		path = pattern.Post
+		method = http.MethodPost
+	case *annotations.HttpRule_Delete:
+		path = pattern.Delete
+		method = http.MethodDelete
+	case *annotations.HttpRule_Patch:
+		path = pattern.Patch
+		method = http.MethodPatch
+	case *annotations.HttpRule_Custom:
+		path = pattern.Custom.Path
+		method = pattern.Custom.Kind
+	}
+	body = rule.Body
+	responseBody = rule.ResponseBody
+	md := buildMethodDesc(g, m, method, path)
+	if method == http.MethodGet || method == http.MethodDelete {
+		if body != "" {
+			_, _ = fmt.Fprintf(os.Stderr, "\u001B[31mWARN\u001B[m: %s %s body should not be declared.\n", method, path)
+		}
+	} else {
+		if body == "" {
+			_, _ = fmt.Fprintf(os.Stderr, "\u001B[31mWARN\u001B[m: %s %s does not declare a body.\n", method, path)
+		}
+	}
+	if body == "*" {
+		md.HasBody = true
+		md.Body = ""
+	} else if body != "" {
+		md.HasBody = true
+		md.Body = "." + camelCaseVars(body)
+	} else {
+		md.HasBody = false
+	}
+	if responseBody == "*" {
+		md.ResponseBody = ""
+	} else if responseBody != "" {
+		md.ResponseBody = "." + camelCaseVars(responseBody)
+	}
+	return md
+}
+
+func buildMethodDesc(g *protogen.GeneratedFile, m *protogen.Method, method, path string) *methodDesc {
+	defer func() { methodSets[m.GoName]++ }()
+
+	vars := buildPathVars(path)
+
+	for v, s := range vars {
+		fields := m.Input.Desc.Fields()
+
+		if s != nil {
+			path = replacePath(v, *s, path)
+		}
+		for _, field := range strings.Split(v, ".") {
+			if strings.TrimSpace(field) == "" {
+				continue
+			}
+			if strings.Contains(field, ":") {
+				field = strings.Split(field, ":")[0]
+			}
+			fd := fields.ByName(protoreflect.Name(field))
+			if fd == nil {
+				fmt.Fprintf(os.Stderr, "\u001B[31mERROR\u001B[m: The corresponding field '%s' declaration in message could not be found in '%s'\n", v, path)
+				os.Exit(2)
+			}
+			if fd.IsMap() {
+				fmt.Fprintf(os.Stderr, "\u001B[31mWARN\u001B[m: The field in path:'%s' shouldn't be a map.\n", v)
+			} else if fd.IsList() {
+				fmt.Fprintf(os.Stderr, "\u001B[31mWARN\u001B[m: The field in path:'%s' shouldn't be a list.\n", v)
+			} else if fd.Kind() == protoreflect.MessageKind || fd.Kind() == protoreflect.GroupKind {
+				fields = fd.Message().Fields()
+			}
+		}
+	}
+	return &methodDesc{
+		Name:         m.GoName,
+		OriginalName: string(m.Desc.Name()),
+		Num:          methodSets[m.GoName],
+		Request:      g.QualifiedGoIdent(m.Input.GoIdent),
+		Reply:        g.QualifiedGoIdent(m.Output.GoIdent),
+		Path:         path,
+		Method:       method,
+		HasVars:      len(vars) > 0,
+	}
+}
+
+func buildPathVars(path string) (res map[string]*string) {
+	if strings.HasSuffix(path, "/") {
+		fmt.Fprintf(os.Stderr, "\u001B[31mWARN\u001B[m: Path %s should not end with \"/\" \n", path)
+	}
+	pattern := regexp.MustCompile(`(?i){([a-z.0-9_\s]*)=?([^{}]*)}`)
+	matches := pattern.FindAllStringSubmatch(path, -1)
+	res = make(map[string]*string, len(matches))
+	for _, m := range matches {
+		name := strings.TrimSpace(m[1])
+		if len(name) > 1 && len(m[2]) > 0 {
+			res[name] = &m[2]
+		} else {
+			res[name] = nil
+		}
+	}
+	return
+}
+
+func replacePath(name string, value string, path string) string {
+	pattern := regexp.MustCompile(fmt.Sprintf(`(?i){([\s]*%s[\s]*)=?([^{}]*)}`, name))
+	idx := pattern.FindStringIndex(path)
+	if len(idx) > 0 {
+		path = fmt.Sprintf("%s{%s:%s}%s",
+			path[:idx[0]], // The start of the match
+			name,
+			strings.ReplaceAll(value, "*", ".*"),
+			path[idx[1]:],
+		)
+	}
+	return path
+}
+
+func camelCaseVars(s string) string {
+	subs := strings.Split(s, ".")
+	vars := make([]string, 0, len(subs))
+	for _, sub := range subs {
+		vars = append(vars, camelCase(sub))
+	}
+	return strings.Join(vars, ".")
+}
+
+// camelCase returns the CamelCased name.
+// If there is an interior underscore followed by a lower case letter,
+// drop the underscore and convert the letter to upper case.
+// There is a remote possibility of this rewrite causing a name collision,
+// but it's so remote we're prepared to pretend it's nonexistent - since the
+// C++ generator lowercase names, it's extremely unlikely to have two fields
+// with different capitalization.
+// In short, _my_field_name_2 becomes XMyFieldName_2.
+func camelCase(s string) string {
+	if s == "" {
+		return ""
+	}
+	t := make([]byte, 0, 32)
+	i := 0
+	if s[0] == '_' {
+		// Need a capital letter; drop the '_'.
+		t = append(t, 'X')
+		i++
+	}
+	// Invariant: if the next letter is lower case, it must be converted
+	// to upper case.
+	// That is, we process a word at a time, where words are marked by _ or
+	// upper case letter. Digits are treated as words.
+	for ; i < len(s); i++ {
+		c := s[i]
+		if c == '_' && i+1 < len(s) && isASCIILower(s[i+1]) {
+			continue // Skip the underscore in s.
+		}
+		if isASCIIDigit(c) {
+			t = append(t, c)
+			continue
+		}
+		// Assume we have a letter now - if not, it's a bogus identifier.
+		// The next word is a sequence of characters that must start upper case.
+		if isASCIILower(c) {
+			c ^= ' ' // Make it a capital letter.
+		}
+		t = append(t, c) // Guaranteed not lower case.
+		// Accept lower case sequence that follows.
+		for i+1 < len(s) && isASCIILower(s[i+1]) {
+			i++
+			t = append(t, s[i])
+		}
+	}
+	return string(t)
+}
+
+// Is c an ASCII lower-case letter?
+func isASCIILower(c byte) bool {
+	return 'a' <= c && c <= 'z'
+}
+
+// Is c an ASCII digit?
+func isASCIIDigit(c byte) bool {
+	return '0' <= c && c <= '9'
+}
+
+func protocVersion(gen *protogen.Plugin) string {
+	v := gen.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)
+}
+
+const deprecationComment = "// Deprecated: Do not use."
--- a/cmd/proto-gen-go-broker/broker/broker.pb.go
+++ b/cmd/proto-gen-go-broker/broker/broker.pb.go
@ -0,0 +1,113 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.28.1
+// 	protoc        v3.19.4
+// source: cmd/proto-gen-go-broker/broker/broker.proto
+
+package broker
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	descriptorpb "google.golang.org/protobuf/types/descriptorpb"
+	reflect "reflect"
+)
+
+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)
+)
+
+var file_cmd_proto_gen_go_broker_broker_broker_proto_extTypes = []protoimpl.ExtensionInfo{
+	{
+		ExtendedType:  (*descriptorpb.MethodOptions)(nil),
+		ExtensionType: (*string)(nil),
+		Field:         1001011,
+		Name:          "errors.receive_topic",
+		Tag:           "bytes,1001011,opt,name=receive_topic",
+		Filename:      "cmd/proto-gen-go-broker/broker/broker.proto",
+	},
+	{
+		ExtendedType:  (*descriptorpb.MethodOptions)(nil),
+		ExtensionType: (*string)(nil),
+		Field:         1008611,
+		Name:          "errors.output_topic",
+		Tag:           "bytes,1008611,opt,name=output_topic",
+		Filename:      "cmd/proto-gen-go-broker/broker/broker.proto",
+	},
+}
+
+// Extension fields to descriptorpb.MethodOptions.
+var (
+	// optional string receive_topic = 1001011;
+	E_ReceiveTopic = &file_cmd_proto_gen_go_broker_broker_broker_proto_extTypes[0]
+	// optional string output_topic = 1008611;
+	E_OutputTopic = &file_cmd_proto_gen_go_broker_broker_broker_proto_extTypes[1]
+)
+
+var File_cmd_proto_gen_go_broker_broker_broker_proto protoreflect.FileDescriptor
+
+var file_cmd_proto_gen_go_broker_broker_broker_proto_rawDesc = []byte{
+	0x0a, 0x2b, 0x63, 0x6d, 0x64, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2d, 0x67, 0x65, 0x6e, 0x2d,
+	0x67, 0x6f, 0x2d, 0x62, 0x72, 0x6f, 0x6b, 0x65, 0x72, 0x2f, 0x62, 0x72, 0x6f, 0x6b, 0x65, 0x72,
+	0x2f, 0x62, 0x72, 0x6f, 0x6b, 0x65, 0x72, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x06, 0x65,
+	0x72, 0x72, 0x6f, 0x72, 0x73, 0x1a, 0x20, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2f, 0x70, 0x72,
+	0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2f, 0x64, 0x65, 0x73, 0x63, 0x72, 0x69, 0x70, 0x74, 0x6f,
+	0x72, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x3a, 0x45, 0x0a, 0x0d, 0x72, 0x65, 0x63, 0x65, 0x69,
+	0x76, 0x65, 0x5f, 0x74, 0x6f, 0x70, 0x69, 0x63, 0x12, 0x1e, 0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c,
+	0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2e, 0x4d, 0x65, 0x74, 0x68, 0x6f,
+	0x64, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x18, 0xb3, 0x8c, 0x3d, 0x20, 0x01, 0x28, 0x09,
+	0x52, 0x0c, 0x72, 0x65, 0x63, 0x65, 0x69, 0x76, 0x65, 0x54, 0x6f, 0x70, 0x69, 0x63, 0x3a, 0x43,
+	0x0a, 0x0c, 0x6f, 0x75, 0x74, 0x70, 0x75, 0x74, 0x5f, 0x74, 0x6f, 0x70, 0x69, 0x63, 0x12, 0x1e,
+	0x2e, 0x67, 0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66,
+	0x2e, 0x4d, 0x65, 0x74, 0x68, 0x6f, 0x64, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x18, 0xe3,
+	0xc7, 0x3d, 0x20, 0x01, 0x28, 0x09, 0x52, 0x0b, 0x6f, 0x75, 0x74, 0x70, 0x75, 0x74, 0x54, 0x6f,
+	0x70, 0x69, 0x63, 0x42, 0x6a, 0x0a, 0x18, 0x63, 0x6f, 0x6d, 0x2e, 0x67, 0x69, 0x74, 0x68, 0x75,
+	0x62, 0x2e, 0x6b, 0x72, 0x61, 0x74, 0x6f, 0x73, 0x2e, 0x42, 0x72, 0x6f, 0x6b, 0x65, 0x72, 0x50,
+	0x01, 0x5a, 0x3d, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x67, 0x6f,
+	0x2d, 0x6b, 0x72, 0x61, 0x74, 0x6f, 0x73, 0x2f, 0x6b, 0x72, 0x61, 0x74, 0x6f, 0x73, 0x2f, 0x76,
+	0x32, 0x2f, 0x63, 0x6d, 0x64, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2d, 0x67, 0x65, 0x6e, 0x2d,
+	0x67, 0x6f, 0x2d, 0x62, 0x72, 0x6f, 0x6b, 0x65, 0x72, 0x3b, 0x62, 0x72, 0x6f, 0x6b, 0x65, 0x72,
+	0xa2, 0x02, 0x0c, 0x4b, 0x72, 0x61, 0x74, 0x6f, 0x73, 0x42, 0x72, 0x6f, 0x6b, 0x65, 0x72, 0x62,
+	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var file_cmd_proto_gen_go_broker_broker_broker_proto_goTypes = []interface{}{
+	(*descriptorpb.MethodOptions)(nil), // 0: google.protobuf.MethodOptions
+}
+var file_cmd_proto_gen_go_broker_broker_broker_proto_depIdxs = []int32{
+	0, // 0: errors.receive_topic:extendee -> google.protobuf.MethodOptions
+	0, // 1: errors.output_topic:extendee -> google.protobuf.MethodOptions
+	2, // [2:2] is the sub-list for method output_type
+	2, // [2:2] is the sub-list for method input_type
+	2, // [2:2] is the sub-list for extension type_name
+	0, // [0:2] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_cmd_proto_gen_go_broker_broker_broker_proto_init() }
+func file_cmd_proto_gen_go_broker_broker_broker_proto_init() {
+	if File_cmd_proto_gen_go_broker_broker_broker_proto != nil {
+		return
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_cmd_proto_gen_go_broker_broker_broker_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   0,
+			NumExtensions: 2,
+			NumServices:   0,
+		},
+		GoTypes:           file_cmd_proto_gen_go_broker_broker_broker_proto_goTypes,
+		DependencyIndexes: file_cmd_proto_gen_go_broker_broker_broker_proto_depIdxs,
+		ExtensionInfos:    file_cmd_proto_gen_go_broker_broker_broker_proto_extTypes,
+	}.Build()
+	File_cmd_proto_gen_go_broker_broker_broker_proto = out.File
+	file_cmd_proto_gen_go_broker_broker_broker_proto_rawDesc = nil
+	file_cmd_proto_gen_go_broker_broker_broker_proto_goTypes = nil
+	file_cmd_proto_gen_go_broker_broker_broker_proto_depIdxs = nil
+}
--- a/cmd/proto-gen-go-broker/broker/broker.proto
+++ b/cmd/proto-gen-go-broker/broker/broker.proto
@ -0,0 +1,17 @@
+syntax = "proto3";
+
+package errors;
+
+option go_package = "github.com/go-kratos/kratos/v2/cmd/proto-gen-go-broker;broker";
+option java_multiple_files = true;
+option java_package = "com.github.kratos.Broker";
+option objc_class_prefix = "KratosBroker";
+
+import "google/protobuf/descriptor.proto";
+
+
+
+extend google.protobuf.MethodOptions {
+  string receive_topic = 1001011;
+  string output_topic = 1008611;
+}
--- a/cmd/proto-gen-go-broker/broker_test.go
+++ b/cmd/proto-gen-go-broker/broker_test.go
@ -0,0 +1,87 @@
+package main
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestNoParameters(t *testing.T) {
+	path := "/test/noparams"
+	m := buildPathVars(path)
+	if !reflect.DeepEqual(m, map[string]*string{}) {
+		t.Fatalf("Map should be empty")
+	}
+}
+
+func TestSingleParam(t *testing.T) {
+	path := "/test/{message.id}"
+	m := buildPathVars(path)
+	if !reflect.DeepEqual(len(m), 1) {
+		t.Fatalf("len(m) not is 1")
+	}
+	if m["message.id"] != nil {
+		t.Fatalf(`m["message.id"] should be empty`)
+	}
+}
+
+func TestTwoParametersReplacement(t *testing.T) {
+	path := "/test/{message.id}/{message.name=messages/*}"
+	m := buildPathVars(path)
+	if len(m) != 2 {
+		t.Fatal("len(m) should be 2")
+	}
+	if m["message.id"] != nil {
+		t.Fatal(`m["message.id"] should be nil`)
+	}
+	if m["message.name"] == nil {
+		t.Fatal(`m["message.name"] should not be nil`)
+	}
+	if *m["message.name"] != "messages/*" {
+		t.Fatal(`m["message.name"] should be "messages/*"`)
+	}
+}
+
+func TestNoReplacePath(t *testing.T) {
+	path := "/test/{message.id=test}"
+	if !reflect.DeepEqual(replacePath("message.id", "test", path), "/test/{message.id:test}") {
+		t.Fatal(`replacePath("message.id", "test", path) should be "/test/{message.id:test}"`)
+	}
+	path = "/test/{message.id=test/*}"
+	if !reflect.DeepEqual(replacePath("message.id", "test/*", path), "/test/{message.id:test/.*}") {
+		t.Fatal(`replacePath("message.id", "test/*", path) should be "/test/{message.id:test/.*}"`)
+	}
+}
+
+func TestReplacePath(t *testing.T) {
+	path := "/test/{message.id}/{message.name=messages/*}"
+	newPath := replacePath("message.name", "messages/*", path)
+	if !reflect.DeepEqual("/test/{message.id}/{message.name:messages/.*}", newPath) {
+		t.Fatal(`replacePath("message.name", "messages/*", path) should be "/test/{message.id}/{message.name:messages/.*}"`)
+	}
+}
+
+func TestIteration(t *testing.T) {
+	path := "/test/{message.id}/{message.name=messages/*}"
+	vars := buildPathVars(path)
+	for v, s := range vars {
+		if s != nil {
+			path = replacePath(v, *s, path)
+		}
+	}
+	if !reflect.DeepEqual("/test/{message.id}/{message.name:messages/.*}", path) {
+		t.Fatal(`replacePath("message.name", "messages/*", path) should be "/test/{message.id}/{message.name:messages/.*}"`)
+	}
+}
+
+func TestIterationMiddle(t *testing.T) {
+	path := "/test/{message.name=messages/*}/books"
+	vars := buildPathVars(path)
+	for v, s := range vars {
+		if s != nil {
+			path = replacePath(v, *s, path)
+		}
+	}
+	if !reflect.DeepEqual("/test/{message.name:messages/.*}/books", path) {
+		t.Fatal(`replacePath("message.name", "messages/*", path) should be "/test/{message.name:messages/.*}/books"`)
+	}
+}
--- a/cmd/proto-gen-go-broker/go.mod
+++ b/cmd/proto-gen-go-broker/go.mod
@ -0,0 +1,8 @@
+module github.com/go-kratos/kratos/cmd/protoc-gen-go-http/v2
+
+go 1.16
+
+require (
+	google.golang.org/genproto v0.0.0-20220519153652-3a47de7e79bd
+	google.golang.org/protobuf v1.28.0
+)
--- a/cmd/proto-gen-go-broker/main.go
+++ b/cmd/proto-gen-go-broker/main.go
@ -0,0 +1,34 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+
+	"google.golang.org/protobuf/compiler/protogen"
+	"google.golang.org/protobuf/types/pluginpb"
+)
+
+var (
+	showVersion = flag.Bool("version", false, "print the version and exit")
+	omitempty   = flag.Bool("omitempty", true, "omit if google.api is empty")
+)
+
+func main() {
+	flag.Parse()
+	if *showVersion {
+		fmt.Printf("protoc-gen-go-http %v\n", release)
+		return
+	}
+	protogen.Options{
+		ParamFunc: flag.CommandLine.Set,
+	}.Run(func(gen *protogen.Plugin) error {
+		gen.SupportedFeatures = uint64(pluginpb.CodeGeneratorResponse_FEATURE_PROTO3_OPTIONAL)
+		for _, f := range gen.Files {
+			if !f.Generate {
+				continue
+			}
+			generateFile(gen, f, *omitempty)
+		}
+		return nil
+	})
+}
--- a/cmd/proto-gen-go-broker/template.go
+++ b/cmd/proto-gen-go-broker/template.go
@ -0,0 +1,140 @@
+package main
+
+import (
+	"bytes"
+	"strings"
+	"text/template"
+)
+
+var httpTemplate = `
+{{$svrType := .ServiceType}}
+{{$svrName := .ServiceName}}
+
+{{- range .MethodSets}}
+const Operation{{$svrType}}{{.OriginalName}} = "/{{$svrName}}/{{.OriginalName}}"
+{{- end}}
+
+type {{.ServiceType}}HTTPServer interface {
+{{- range .MethodSets}}
+	{{.Name}}(context.Context, *{{.Request}}) (*{{.Reply}}, error)
+{{- end}}
+}
+
+func Register{{.ServiceType}}HTTPServer(s *http.Server, srv {{.ServiceType}}HTTPServer) {
+	r := s.Route("/")
+	{{- range .Methods}}
+	r.{{.Method}}("{{.Path}}", _{{$svrType}}_{{.Name}}{{.Num}}_HTTP_Handler(srv))
+	{{- end}}
+}
+
+{{range .Methods}}
+func _{{$svrType}}_{{.Name}}{{.Num}}_HTTP_Handler(srv {{$svrType}}HTTPServer) func(ctx http.Context) error {
+	return func(ctx http.Context) error {
+		var in {{.Request}}
+		{{- if .HasBody}}
+		if err := ctx.Bind(&in{{.Body}}); err != nil {
+			return err
+		}
+		
+		{{- if not (eq .Body "")}}
+		if err := ctx.BindQuery(&in); err != nil {
+			return err
+		}
+		{{- end}}
+		{{- else}}
+		if err := ctx.BindQuery(&in{{.Body}}); err != nil {
+			return err
+		}
+		{{- end}}
+		{{- if .HasVars}}
+		if err := ctx.BindVars(&in); err != nil {
+			return err
+		}
+		{{- end}}
+		http.SetOperation(ctx,Operation{{$svrType}}{{.OriginalName}})
+		h := ctx.Middleware(func(ctx context.Context, req interface{}) (interface{}, error) {
+			return srv.{{.Name}}(ctx, req.(*{{.Request}}))
+		})
+		out, err := h(ctx, &in)
+		if err != nil {
+			return err
+		}
+		reply := out.(*{{.Reply}})
+		return ctx.Result(200, reply{{.ResponseBody}})
+	}
+}
+{{end}}
+
+type {{.ServiceType}}HTTPClient interface {
+{{- range .MethodSets}}
+	{{.Name}}(ctx context.Context, req *{{.Request}}, opts ...http.CallOption) (rsp *{{.Reply}}, err error) 
+{{- end}}
+}
+	
+type {{.ServiceType}}HTTPClientImpl struct{
+	cc *http.Client
+}
+	
+func New{{.ServiceType}}HTTPClient (client *http.Client) {{.ServiceType}}HTTPClient {
+	return &{{.ServiceType}}HTTPClientImpl{client}
+}
+
+{{range .MethodSets}}
+func (c *{{$svrType}}HTTPClientImpl) {{.Name}}(ctx context.Context, in *{{.Request}}, opts ...http.CallOption) (*{{.Reply}}, error) {
+	var out {{.Reply}}
+	pattern := "{{.Path}}"
+	path := binding.EncodeURL(pattern, in, {{not .HasBody}})
+	opts = append(opts, http.Operation(Operation{{$svrType}}{{.OriginalName}}))
+	opts = append(opts, http.PathTemplate(pattern))
+	{{if .HasBody -}}
+	err := c.cc.Invoke(ctx, "{{.Method}}", path, in{{.Body}}, &out{{.ResponseBody}}, opts...)
+	{{else -}} 
+	err := c.cc.Invoke(ctx, "{{.Method}}", path, nil, &out{{.ResponseBody}}, opts...)
+	{{end -}}
+	if err != nil {
+		return nil, err
+	}
+	return &out, err
+}
+{{end}}
+`
+
+type serviceDesc struct {
+	ServiceType string // Greeter
+	ServiceName string // helloworld.Greeter
+	Metadata    string // api/helloworld/helloworld.proto
+	Methods     []*methodDesc
+	MethodSets  map[string]*methodDesc
+}
+
+type methodDesc struct {
+	// method
+	Name         string
+	OriginalName string // The parsed original name
+	Num          int
+	Request      string
+	Reply        string
+	// http_rule
+	Path         string
+	Method       string
+	HasVars      bool
+	HasBody      bool
+	Body         string
+	ResponseBody string
+}
+
+func (s *serviceDesc) execute() string {
+	s.MethodSets = make(map[string]*methodDesc)
+	for _, m := range s.Methods {
+		s.MethodSets[m.Name] = m
+	}
+	buf := new(bytes.Buffer)
+	tmpl, err := template.New("http").Parse(strings.TrimSpace(httpTemplate))
+	if err != nil {
+		panic(err)
+	}
+	if err := tmpl.Execute(buf, s); err != nil {
+		panic(err)
+	}
+	return strings.Trim(buf.String(), "\r\n")
+}
--- a/cmd/proto-gen-go-broker/version.go
+++ b/cmd/proto-gen-go-broker/version.go
@ -0,0 +1,4 @@
+package main
+
+// release is the current protoc-gen-go-http version.
+const release = "v2.5.2"
--- a/contrib/registry/consul/client.go
+++ b/contrib/registry/consul/client.go
@ -144,6 +144,37 @@ func (c *Client) Register(_ context.Context, svc *registry.ServiceInstance, enab
 	}

 	err := c.cli.Agent().ServiceRegister(asr)
+	/*
+		for _, name := range c.otherName {
+			// 执行注册多个服务名的流程
+			addresses := make(map[string]api.ServiceAddress, len(svc.Endpoints))
+			checkAddresses := make([]string, 0, len(svc.Endpoints))
+			for _, endpoint := range svc.Endpoints {
+				raw, err := url.Parse(endpoint)
+				if err != nil {
+					return err
+				}
+				addr := raw.Hostname()
+				port, _ := strconv.ParseUint(raw.Port(), 10, 16)
+
+				checkAddresses = append(checkAddresses, net.JoinHostPort(addr, strconv.FormatUint(port, 10)))
+				addresses[raw.Scheme] = api.ServiceAddress{Address: endpoint, Port: int(port)}
+			}
+			asr := &api.AgentServiceRegistration{
+				ID:              svc.ID,
+				Name:            name, // 改成你要注册的其他服务名
+				Meta:            svc.Metadata,
+				Tags:            []string{fmt.Sprintf("version=%s", svc.Version)},
+				TaggedAddresses: addresses,
+			}
+			if len(checkAddresses) > 0 {
+				host, portRaw, _ := net.SplitHostPort(checkAddresses[0])
+				port, _ := strconv.ParseInt(portRaw, 10, 32)
+				asr.Address = host
+				asr.Port = int(port)
+			}
+		}
+	*/
 	if err != nil {
 		return err
 	}
--- a/contrib/registry/etcd/registry.go
+++ b/contrib/registry/etcd/registry.go
@ -88,6 +88,25 @@ func (r *Registry) Register(ctx context.Context, service *registry.ServiceInstan
 	}

 	go r.heartBeat(r.opts.ctx, leaseID, key, value)
+
+	// 注册额外服务名
+	for _, name := range o.names {
+		key := fmt.Sprintf("%s/%s/%s", r.opts.namespace, service.Name, service.ID)
+		value, err := marshal(service)
+		if err != nil {
+			return err
+		}
+		if r.lease != nil {
+			r.lease.Close()
+		}
+		r.lease = clientv3.NewLease(r.client)
+		leaseID, err := r.registerWithKV(ctx, key, value)
+		if err != nil {
+			return err
+		}
+
+		go r.heartBeat(r.opts.ctx, leaseID, key, value)
+	}
 	return nil
 }

--- a/openapi.yaml
+++ b/openapi.yaml
@ -0,0 +1,10 @@
+# Generated with protoc-gen-openapi
+# https://github.com/google/gnostic/tree/master/cmd/protoc-gen-openapi
+
+openapi: 3.0.3
+info:
+    title: ""
+    version: 0.0.1
+paths: {}
+components:
+    schemas: {}
--- a/transport/broker/broker.go
+++ b/transport/broker/broker.go
@ -0,0 +1,17 @@
+package broker
+
+import "context"
+
+type Event interface {
+	Key() string
+	Header() map[string]string
+	Value() []byte
+}
+
+type Handler func(context.Context, Event) error
+
+type Broker interface {
+	Receive(topic string, handler Handler) error
+	Send(ctx context.Context, msg Event) error
+	Close() error
+}
--- a/transport/broker/transport.go
+++ b/transport/broker/transport.go
@ -0,0 +1,37 @@
+package broker
+
+import (
+	"context"
+	"github.com/go-kratos/kratos/v2/transport"
+)
+
+type broker struct {
+	broker   Broker
+	receives map[string]Handler
+}
+
+type HandlerFunc func(context.Context, Event) error
+
+func (b *broker) Start(_ context.Context) error {
+	for topic, handler := range b.receives {
+		if err := b.broker.Receive(topic, func(ctx context.Context, event Event) error {
+			return handler(ctx, event)
+		}); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (b *broker) Stop(ctx context.Context) error {
+	return b.broker.Close()
+}
+
+func NewBroker(b Broker) transport.Server {
+	return &broker{}
+}
+
+// Receive registers a handler for the given topic.
+func (b *broker) Receive(topic string, handler Handler) error {
+	return b.broker.Receive(topic, handler)
+}
--- a/transport/grpc/balancer.go
+++ b/transport/grpc/balancer.go
@ -19,6 +19,10 @@ var (
 	_ balancer.Picker    = (*balancerPicker)(nil)
 )

+type balancerBuilder struct {
+	builder selector.Builder
+}
+
 func init() {
 	b := base.NewBalancerBuilder(
 		balancerName,
@ -30,10 +34,6 @@ func init() {
 	balancer.Register(b)
 }

-type balancerBuilder struct {
-	builder selector.Builder
-}
-
 // Build creates a grpc Picker.
 func (b *balancerBuilder) Build(info base.PickerBuildInfo) balancer.Picker {
 	if len(info.ReadySCs) == 0 {
--- a/transport/transport.go
+++ b/transport/transport.go
@ -63,6 +63,7 @@ func (k Kind) String() string { return string(k) }
 const (
 	KindGRPC   Kind = "grpc"
 	KindHTTP   Kind = "http"
+	KindBroker Kind = "broker"
 )

 type (