Merge pull request 'add scheme to metadata' (#165) from scheme-v3 into v3

Reviewed-on: #165

README.md

@@ -9,8 +9,8 @@ to create a HTTP Server that could potentially be used for REST based API servic
 import (
 	"net/http"
 
-	"go.unistack.org/micro/v4/server"
-	httpServer "go.unistack.org/micro-server-http/v4"
+	"github.com/unistack-org/micro/v3/server"
+	httpServer "github.com/unistack-org/micro-server-http"
 )
 
 func main() {
@@ -37,9 +37,9 @@ Or as part of a service
 import (
 	"net/http"
 
-	"go.unistack.org/micro/v4"
-	"go.unistack.org/micro/v4/server"
-	httpServer "go.unistack.org/micro-server-http/v4"
+	"github.com/unistack-org/micro/v3"
+	"github.com/unistack-org/micro/v3/server"
+	httpServer "github.com/unistack-org/micro-server-http"
 )
 
 func main() {

go.mod

@@ -1,19 +1,16 @@
-module go.unistack.org/micro-server-http/v4
+module go.unistack.org/micro-server-http/v3
 
-go 1.19
+go 1.18
 
 require (
-	go.unistack.org/micro-codec-yaml/v4 v4.0.0
-	go.unistack.org/micro-proto/v4 v4.0.0
-	go.unistack.org/micro/v4 v4.0.6
+	go.unistack.org/micro-proto/v3 v3.3.1
+	go.unistack.org/micro/v3 v3.10.14
 	golang.org/x/net v0.7.0
 )
 
 require (
-	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/google/gnostic v0.6.9 // indirect
-	google.golang.org/protobuf v1.31.0 // indirect
-	gopkg.in/yaml.v2 v2.4.0 // indirect
+	google.golang.org/protobuf v1.28.1 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
-	sigs.k8s.io/yaml v1.3.0 // indirect
 )

go.sum

@@ -11,7 +11,6 @@ github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGX
 github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
 github.com/cncf/xds/go v0.0.0-20210312221358-fbca930ec8ed/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815/go.mod h1:WwZ+bS3ebgob9U8Nd0kOddGdZWjyMGR8Wziv+TBNwSE=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
@@ -36,9 +35,8 @@ github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QD
 github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 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/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
-github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/google/gnostic v0.6.9 h1:ZK/5VhkoX835RikCHpSUJV9a+S3e1zLh59YnyWeBW+0=
 github.com/google/gnostic v0.6.9/go.mod h1:Nm8234We1lq6iB9OmlgNv3nH91XLLVZHCDayfA3xq+E=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
@@ -50,14 +48,17 @@ github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/grpc-ecosystem/grpc-gateway v1.16.0/go.mod h1:BDjrQk3hbvj6Nolgz8mAMFbcEtjT1g+wF4CSlocrBnw=
+github.com/imdario/mergo v0.3.13/go.mod h1:4lJ1jqUDcsbIECGy0RUJAXNIhg+6ocWgb1ALK2O4oXg=
+github.com/kr/pretty v0.2.0 h1:s5hAObm+yFO5uHYt5dYjxi2rXrsnmRpJx4OYvIWUaQs=
 github.com/kr/pretty v0.2.0/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
-github.com/kr/pretty v0.2.1 h1:Fmg33tUaq4/8ym9TJN1x7sLJnHVwhP33CNkpYV/7rwI=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
-github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/patrickmn/go-cache v2.1.0+incompatible/go.mod h1:3Qf8kWWT7OJRJbdiICTKqZju1ZixQ/KpMGzzAfe6+WQ=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
+github.com/silas/dag v0.0.0-20211117232152-9d50aa809f35/go.mod h1:7RTUFBdIRC9nZ7/3RyRNH1bdqIShrDejd1YbLwgPS+I=
 github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72/go.mod h1:JwIasOWyU6f++ZhiEuf87xNszmSA2myDM2Kzu9HwQUA=
 github.com/stoewer/go-strcase v1.2.0/go.mod h1:IBiWB2sKIp3wVVQ3Y035++gc+knqhUQag1KpM8ahLw8=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
@@ -67,12 +68,10 @@ github.com/xeipuuv/gojsonpointer v0.0.0-20180127040702-4e3ac2762d5f/go.mod h1:N2
 github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415/go.mod h1:GwrjFmJcFw6At/Gs6z4yjiIwzuJ1/+UwLxMQDVQXShQ=
 github.com/xeipuuv/gojsonschema v1.2.0/go.mod h1:anYRn/JVcOK2ZgGU+IjEV4nwlhoK5sQluxsYJ78Id3Y=
 go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
-go.unistack.org/micro-codec-yaml/v4 v4.0.0 h1:DK/+fA69gmnvYmGHe3kqVR0pukS8ank5lPG4MfdPQEk=
-go.unistack.org/micro-codec-yaml/v4 v4.0.0/go.mod h1:UG4ouILbUfgNL7nvp7CpmD2IIzO8bQHjzDIahOvIAgM=
-go.unistack.org/micro-proto/v4 v4.0.0 h1:+TAwKSlx48eLsNO2E2cO0JLE8we1KU2AuWe9Q310FuU=
-go.unistack.org/micro-proto/v4 v4.0.0/go.mod h1:ArmK7o+uFvxSY3dbJhKBBX4Pm1rhWdLEFf3LxBrMtec=
-go.unistack.org/micro/v4 v4.0.6 h1:YFWvTh3VwyOd6NHYTQcf47n2TF5+p/EhpnbuBQX3qhk=
-go.unistack.org/micro/v4 v4.0.6/go.mod h1:bVEYTlPi0EsdgZZt311bIroDg9ict7ky3C87dSCCAGk=
+go.unistack.org/micro-proto/v3 v3.3.1 h1:nQ0MtWvP2G3QrpOgawVOPhpZZYkq6umTGDqs8FxJYIo=
+go.unistack.org/micro-proto/v3 v3.3.1/go.mod h1:cwRyv8uInM2I7EbU7O8Fx2Ls3N90Uw9UCCcq4olOdfE=
+go.unistack.org/micro/v3 v3.10.14 h1:7fgLpwGlCN67twhwtngJDEQvrMkUBDSA5vzZqxIDqNE=
+go.unistack.org/micro/v3 v3.10.14/go.mod h1:uMAc0U/x7dmtICCrblGf0ZLgYegu3VwQAquu+OFCw1Q=
 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/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
@@ -143,19 +142,17 @@ google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlba
 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/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
-google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8=
-google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
+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=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
-gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-sigs.k8s.io/yaml v1.3.0 h1:a2VclLzOGrwOHDiV8EfBGhvjHvP46CtW5j6POvhYGGo=
-sigs.k8s.io/yaml v1.3.0/go.mod h1:GeOyir5tyXNByN85N/dRIT9es5UQNerPYEKK56eTBm8=

handler.go

@@ -9,17 +9,17 @@ import (
 	"strings"
 	"sync"
 
-	"go.unistack.org/micro/v4/errors"
-	"go.unistack.org/micro/v4/logger"
-	"go.unistack.org/micro/v4/metadata"
-	"go.unistack.org/micro/v4/register"
-	"go.unistack.org/micro/v4/server"
-	rhttp "go.unistack.org/micro/v4/util/http"
-	rflutil "go.unistack.org/micro/v4/util/reflect"
+	"go.unistack.org/micro/v3/errors"
+	"go.unistack.org/micro/v3/logger"
+	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/register"
+	"go.unistack.org/micro/v3/server"
+	rhttp "go.unistack.org/micro/v3/util/http"
+	rflutil "go.unistack.org/micro/v3/util/reflect"
 )
 
 var (
-	DefaultErrorHandler = func(ctx context.Context, s interface{}, w http.ResponseWriter, r *http.Request, err error, status int) {
+	DefaultErrorHandler = func(ctx context.Context, s server.Handler, w http.ResponseWriter, r *http.Request, err error, status int) {
 		w.WriteHeader(status)
 		if _, cerr := w.Write([]byte(err.Error())); cerr != nil {
 			logger.DefaultLogger.Errorf(ctx, "write failed: %v", cerr)
@@ -35,7 +35,7 @@ type patHandler struct {
 }
 
 type httpHandler struct {
-	opts     server.HandleOptions
+	opts     server.HandlerOptions
 	hd       interface{}
 	handlers *rhttp.Trie
 	name     string
@@ -56,7 +56,7 @@ func (h *httpHandler) Endpoints() []*register.Endpoint {
 	return h.eps
 }
 
-func (h *httpHandler) Options() server.HandleOptions {
+func (h *httpHandler) Options() server.HandlerOptions {
 	return h.opts
 }
 
@@ -266,9 +266,9 @@ func (h *Server) HTTPHandlerFunc(handler interface{}) (http.HandlerFunc, error)
 		}
 
 		// wrap the handler func
-		// for i := len(handler.sopts.Hooks); i > 0; i-- {
-		//	fn = handler.sopts.Hooks[i-1](fn)
-		// }
+		for i := len(handler.sopts.HdlrWrappers); i > 0; i-- {
+			fn = handler.sopts.HdlrWrappers[i-1](fn)
+		}
 
 		if ct == "application/x-www-form-urlencoded" {
 			cf, err = h.newCodec(DefaultContentType)
@@ -416,7 +416,7 @@ func (h *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if !match && h.hd != nil {
-		if hdlr, ok := h.hd.(http.Handler); ok {
+		if hdlr, ok := h.hd.Handler().(http.Handler); ok {
 			hdlr.ServeHTTP(w, r)
 			return
 		}
@@ -487,12 +487,10 @@ func (h *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
-	if len(matches) > 0 {
-		matches = rflutil.FlattenMap(matches)
-		if err = rflutil.Merge(argv.Interface(), matches, rflutil.SliceAppend(true), rflutil.Tags([]string{"protobuf", "json"})); err != nil {
-			h.errorHandler(ctx, handler, w, r, err, http.StatusBadRequest)
-			return
-		}
+	matches = rflutil.FlattenMap(matches)
+	if err = rflutil.Merge(argv.Interface(), matches, rflutil.SliceAppend(true), rflutil.Tags([]string{"protobuf", "json"})); err != nil {
+		h.errorHandler(ctx, handler, w, r, err, http.StatusBadRequest)
+		return
 	}
 
 	hr := &rpcRequest{
@@ -529,9 +527,9 @@ func (h *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	}
 
 	// wrap the handler func
-	// for i := len(handler.sopts.HdlrWrappers); i > 0; i-- {
-	//	fn = handler.sopts.HdlrWrappers[i-1](fn)
-	// }
+	for i := len(handler.sopts.HdlrWrappers); i > 0; i-- {
+		fn = handler.sopts.HdlrWrappers[i-1](fn)
+	}
 
 	if ct == "application/x-www-form-urlencoded" {
 		cf, err = h.newCodec(DefaultContentType)

handler/generate.go

@@ -2,11 +2,11 @@ package handler
 
 import (
 	// import required packages
-	_ "go.unistack.org/micro-proto/v4/openapiv3"
+	_ "go.unistack.org/micro-proto/v3/openapiv3"
 )
 
 //go:generate sh -c "curl -L https://github.com/swagger-api/swagger-ui/archive/refs/tags/v4.18.3.zip -o - | bsdtar -C swagger-ui --strip-components=2 -xv swagger-ui-4.18.3/dist && rm swagger-ui/*.map swagger-ui/*-es-*.js swagger-ui/swagger-ui.js swagger-ui/swagger-initializer.js"
 
-//go:generate sh -c "protoc -I./ -I$(go list -f '{{ .Dir }}' -m go.unistack.org/micro-proto/v4) --go-micro_out='components=micro|http|server',standalone=false,debug=true,paths=source_relative:./ ./meter/meter.proto"
+//go:generate sh -c "protoc -I./ -I$(go list -f '{{ .Dir }}' -m go.unistack.org/micro-proto/v3) --go-micro_out='components=micro|http|server',standalone=false,debug=true,paths=source_relative:./ ./meter/meter.proto"
 
-//go:generate sh -c "protoc -I./ -I$(go list -f '{{ .Dir }}' -m go.unistack.org/micro-proto/v4) --go-micro_out='components=micro|http|server',standalone=false,debug=true,paths=source_relative:./ ./health/health.proto"
+//go:generate sh -c "protoc -I./ -I$(go list -f '{{ .Dir }}' -m go.unistack.org/micro-proto/v3) --go-micro_out='components=micro|http|server',standalone=false,debug=true,paths=source_relative:./ ./health/health.proto"

handler/health/health.go

@@ -1,13 +1,13 @@
-package health // import "go.unistack.org/micro-server-http/v4/handler/health"
+package health // import "go.unistack.org/micro-server-http/v3/handler/health"
 
 import (
 	"context"
 
-	codecpb "go.unistack.org/micro-proto/v4/codec"
-	"go.unistack.org/micro/v4/errors"
+	codecpb "go.unistack.org/micro-proto/v3/codec"
+	"go.unistack.org/micro/v3/errors"
 )
 
-var _ HealthServiceServer = (*Handler)(nil)
+var _ HealthServiceServer = &Handler{}
 
 type Handler struct {
 	opts Options

handler/health/health.proto

@@ -1,7 +1,7 @@
 syntax = "proto3";
 
-package micro.server.http.v4.handler.health;
-option go_package = "go.unistack.org/micro-server-http/v4/handler/health;health";
+package micro.server.http.v3.handler.health;
+option go_package = "go.unistack.org/micro-server-http/v3/handler/health;health";
 
 import "api/annotations.proto";
 import "openapiv3/annotations.proto";

handler/health/health_micro.pb.go

@@ -1,22 +1,22 @@
 // Code generated by protoc-gen-go-micro. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-micro v4.0.0
+// - protoc-gen-go-micro v3.10.2
 // - protoc              v3.21.12
-// source: health/health.proto
+// source: health.proto
 
 package health
 
 import (
 	context "context"
-	codec "go.unistack.org/micro-proto/v4/codec"
-	v4 "go.unistack.org/micro-server-http/v4"
+	codec "go.unistack.org/micro-proto/v3/codec"
+	v3 "go.unistack.org/micro-server-http/v3"
 )
 
 var (
 	HealthServiceName = "HealthService"
 )
 var (
-	HealthServiceServerEndpoints = []v4.EndpointMetadata{
+	HealthServiceServerEndpoints = []v3.EndpointMetadata{
 		{
 			Name:   "HealthService.Live",
 			Path:   "/live",

handler/health/health_micro_http.pb.go

@@ -1,14 +1,14 @@
 // Code generated by protoc-gen-go-micro. DO NOT EDIT.
-// protoc-gen-go-micro version: v4.0.0
-// source: health/health.proto
+// protoc-gen-go-micro version: v3.10.2
+// source: health.proto
 
 package health
 
 import (
 	context "context"
-	codec "go.unistack.org/micro-proto/v4/codec"
-	v4 "go.unistack.org/micro-server-http/v4"
-	server "go.unistack.org/micro/v4/server"
+	codec "go.unistack.org/micro-proto/v3/codec"
+	v3 "go.unistack.org/micro-server-http/v3"
+	server "go.unistack.org/micro/v3/server"
 )
 
 type healthServiceServer struct {
@@ -38,6 +38,6 @@ func RegisterHealthServiceServer(s server.Server, sh HealthServiceServer, opts .
 	}
 	h := &healthServiceServer{sh}
 	var nopts []server.HandlerOption
-	nopts = append(nopts, v4.HandlerEndpoints(HealthServiceServerEndpoints))
+	nopts = append(nopts, v3.HandlerEndpoints(HealthServiceServerEndpoints))
 	return s.Handle(s.NewHandler(&HealthService{h}, append(nopts, opts...)...))
 }

handler/meter/meter.go

@@ -1,16 +1,16 @@
-package meter // import "go.unistack.org/micro-server-http/v4/handler/meter"
+package meter // import "go.unistack.org/micro-server-http/v3/handler/meter"
 
 import (
 	"bytes"
 	"context"
 
-	codecpb "go.unistack.org/micro-proto/v4/codec"
-	"go.unistack.org/micro/v4/errors"
-	"go.unistack.org/micro/v4/meter"
+	codecpb "go.unistack.org/micro-proto/v3/codec"
+	"go.unistack.org/micro/v3/errors"
+	"go.unistack.org/micro/v3/meter"
 )
 
 // guard to fail early
-var _ MeterServiceServer = (*Handler)(nil)
+var _ MeterServiceServer = &Handler{}
 
 type Handler struct {
 	opts Options

handler/meter/meter.proto

@@ -1,7 +1,7 @@
 syntax = "proto3";
 
-package micro.server.http.v4.handler.meter;
-option go_package = "go.unistack.org/micro-server-http/v4/handler/meter;meter";
+package micro.server.http.v3.handler.meter;
+option go_package = "go.unistack.org/micro-server-http/v3/handler/meter;meter";
 
 import "api/annotations.proto";
 import "openapiv3/annotations.proto";

handler/meter/meter_micro.pb.go

@@ -1,22 +1,22 @@
 // Code generated by protoc-gen-go-micro. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-micro v4.0.0
+// - protoc-gen-go-micro v3.10.2
 // - protoc              v3.21.12
-// source: meter/meter.proto
+// source: meter.proto
 
 package meter
 
 import (
 	context "context"
-	codec "go.unistack.org/micro-proto/v4/codec"
-	v4 "go.unistack.org/micro-server-http/v4"
+	codec "go.unistack.org/micro-proto/v3/codec"
+	v3 "go.unistack.org/micro-server-http/v3"
 )
 
 var (
 	MeterServiceName = "MeterService"
 )
 var (
-	MeterServiceServerEndpoints = []v4.EndpointMetadata{
+	MeterServiceServerEndpoints = []v3.EndpointMetadata{
 		{
 			Name:   "MeterService.Metrics",
 			Path:   "/metrics",

handler/meter/meter_micro_http.pb.go

@@ -1,14 +1,14 @@
 // Code generated by protoc-gen-go-micro. DO NOT EDIT.
-// protoc-gen-go-micro version: v4.0.0
-// source: meter/meter.proto
+// protoc-gen-go-micro version: v3.10.2
+// source: meter.proto
 
 package meter
 
 import (
 	context "context"
-	codec "go.unistack.org/micro-proto/v4/codec"
-	v4 "go.unistack.org/micro-server-http/v4"
-	server "go.unistack.org/micro/v4/server"
+	codec "go.unistack.org/micro-proto/v3/codec"
+	v3 "go.unistack.org/micro-server-http/v3"
+	server "go.unistack.org/micro/v3/server"
 )
 
 type meterServiceServer struct {
@@ -28,6 +28,6 @@ func RegisterMeterServiceServer(s server.Server, sh MeterServiceServer, opts ...
 	}
 	h := &meterServiceServer{sh}
 	var nopts []server.HandlerOption
-	nopts = append(nopts, v4.HandlerEndpoints(MeterServiceServerEndpoints))
+	nopts = append(nopts, v3.HandlerEndpoints(MeterServiceServerEndpoints))
 	return s.Handle(s.NewHandler(&MeterService{h}, append(nopts, opts...)...))
 }

handler/swagger-ui/swaggerui.go

@@ -1,4 +1,4 @@
-package swaggerui // import "go.unistack.org/micro-server-http/v4/handler/swagger-ui"
+package swaggerui // import "go.unistack.org/micro-server-http/v3/handler/swagger-ui"
 
 import (
 	"embed"

handler/swagger/swagger.go

@@ -1,55 +0,0 @@
-package swagger
-
-import (
-	"io/fs"
-	"net/http"
-
-	yamlcodec "go.unistack.org/micro-codec-yaml/v4"
-	rutil "go.unistack.org/micro/v4/util/reflect"
-)
-
-// Handler append to generated swagger data from dst map[string]interface{}
-var Handler = func(dst map[string]interface{}, fsys fs.FS) http.HandlerFunc {
-	c := yamlcodec.NewCodec()
-	return func(w http.ResponseWriter, r *http.Request) {
-		if r.Method != http.MethodGet {
-			w.WriteHeader(http.StatusNotFound)
-			return
-		}
-
-		path := r.URL.Path
-		if len(path) > 1 && path[0] == '/' {
-			path = path[1:]
-		}
-
-		buf, err := fs.ReadFile(fsys, path)
-		if err != nil {
-			w.WriteHeader(http.StatusInternalServerError)
-			_, _ = w.Write([]byte(err.Error()))
-			return
-		}
-
-		var src interface{}
-
-		if err = c.Unmarshal(buf, src); err != nil {
-			w.WriteHeader(http.StatusInternalServerError)
-			_, _ = w.Write([]byte(err.Error()))
-			return
-		}
-
-		if err = rutil.Merge(src, dst); err != nil {
-			w.WriteHeader(http.StatusInternalServerError)
-			_, _ = w.Write([]byte(err.Error()))
-			return
-		}
-
-		if buf, err = c.Marshal(src); err != nil {
-			w.WriteHeader(http.StatusInternalServerError)
-			_, _ = w.Write([]byte(err.Error()))
-			return
-		}
-
-		w.WriteHeader(http.StatusOK)
-		_, _ = w.Write(buf)
-	}
-}

http.go

@@ -1,5 +1,5 @@
 // Package http implements a go-micro.Server
-package http // import "go.unistack.org/micro-server-http/v4"
+package http // import "go.unistack.org/micro-server-http/v3"
 
 import (
 	"context"
@@ -9,27 +9,29 @@ import (
 	"net"
 	"net/http"
 	"reflect"
+	"sort"
 	"strings"
 	"sync"
 	"time"
 
-	"go.unistack.org/micro/v4/codec"
-	"go.unistack.org/micro/v4/logger"
-	"go.unistack.org/micro/v4/options"
-	"go.unistack.org/micro/v4/register"
-	"go.unistack.org/micro/v4/server"
-	rhttp "go.unistack.org/micro/v4/util/http"
+	"go.unistack.org/micro/v3/broker"
+	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v3/logger"
+	"go.unistack.org/micro/v3/register"
+	"go.unistack.org/micro/v3/server"
+	rhttp "go.unistack.org/micro/v3/util/http"
 	"golang.org/x/net/netutil"
 )
 
 var _ server.Server = (*Server)(nil)
 
 type Server struct {
-	hd           interface{}
+	hd           server.Handler
 	rsvc         *register.Service
-	handlers     map[string]interface{}
+	handlers     map[string]server.Handler
 	exit         chan chan error
-	errorHandler func(context.Context, interface{}, http.ResponseWriter, *http.Request, error, int)
+	subscribers  map[*httpSubscriber][]broker.Subscriber
+	errorHandler func(context.Context, server.Handler, http.ResponseWriter, *http.Request, error, int)
 	pathHandlers *rhttp.Trie
 	opts         server.Options
 	registerRPC  bool
@@ -58,7 +60,7 @@ func (h *Server) Options() server.Options {
 	return opts
 }
 
-func (h *Server) Init(opts ...options.Option) error {
+func (h *Server) Init(opts ...server.Option) error {
 	if len(opts) == 0 && h.init {
 		return nil
 	}
@@ -68,11 +70,11 @@ func (h *Server) Init(opts ...options.Option) error {
 	for _, o := range opts {
 		o(&h.opts)
 	}
-	if fn, ok := h.opts.Context.Value(errorHandlerKey{}).(func(ctx context.Context, s interface{}, w http.ResponseWriter, r *http.Request, err error, status int)); ok && fn != nil {
+	if fn, ok := h.opts.Context.Value(errorHandlerKey{}).(func(ctx context.Context, s server.Handler, w http.ResponseWriter, r *http.Request, err error, status int)); ok && fn != nil {
 		h.errorHandler = fn
 	}
 	if h.handlers == nil {
-		h.handlers = make(map[string]interface{})
+		h.handlers = make(map[string]server.Handler)
 	}
 	if h.pathHandlers == nil {
 		h.pathHandlers = rhttp.NewTrie()
@@ -99,6 +101,10 @@ func (h *Server) Init(opts ...options.Option) error {
 		h.RUnlock()
 		return err
 	}
+	if err := h.opts.Broker.Init(); err != nil {
+		h.RUnlock()
+		return err
+	}
 	if err := h.opts.Tracer.Init(); err != nil {
 		h.RUnlock()
 		return err
@@ -111,6 +117,10 @@ func (h *Server) Init(opts ...options.Option) error {
 		h.RUnlock()
 		return err
 	}
+	if err := h.opts.Transport.Init(); err != nil {
+		h.RUnlock()
+		return err
+	}
 	h.RUnlock()
 
 	h.Lock()
@@ -120,9 +130,7 @@ func (h *Server) Init(opts ...options.Option) error {
 	return nil
 }
 
-func (h *Server) Handle(handler interface{}, opts ...options.Option) error {
-	options := server.NewHandleOptions(opts...)
-
+func (h *Server) Handle(handler server.Handler) error {
 	// passed unknown handler
 	hdlr, ok := handler.(*httpHandler)
 	if !ok {
@@ -143,18 +151,16 @@ func (h *Server) Handle(handler interface{}, opts ...options.Option) error {
 	// passed micro compat handler
 	h.Lock()
 	if h.handlers == nil {
-		h.handlers = make(map[string]interface{})
-	}
-	for k := range options.Metadata {
-		h.handlers[k] = handler
+		h.handlers = make(map[string]server.Handler)
 	}
+	h.handlers[handler.Name()] = handler
 	h.Unlock()
 
 	return nil
 }
 
-func (h *Server) newHTTPHandler(handler interface{}, opts ...options.Option) *httpHandler {
-	options := server.NewHandleOptions(opts...)
+func (h *Server) NewHandler(handler interface{}, opts ...server.HandlerOption) server.Handler {
+	options := server.NewHandlerOptions(opts...)
 
 	eps := make([]*register.Endpoint, 0, len(options.Metadata))
 	for name, metadata := range options.Metadata {
@@ -282,15 +288,40 @@ func (h *Server) newHTTPHandler(handler interface{}, opts ...options.Option) *ht
 	return hdlr
 }
 
+func (h *Server) NewSubscriber(topic string, handler interface{}, opts ...server.SubscriberOption) server.Subscriber {
+	return newSubscriber(topic, handler, opts...)
+}
+
+func (h *Server) Subscribe(sb server.Subscriber) error {
+	sub, ok := sb.(*httpSubscriber)
+	if !ok {
+		return fmt.Errorf("invalid subscriber: expected *httpSubscriber")
+	}
+	if len(sub.handlers) == 0 {
+		return fmt.Errorf("invalid subscriber: no handler functions")
+	}
+
+	if err := server.ValidateSubscriber(sb); err != nil {
+		return err
+	}
+
+	h.RLock()
+	_, ok = h.subscribers[sub]
+	h.RUnlock()
+	if ok {
+		return fmt.Errorf("subscriber %v already exists", h)
+	}
+	h.Lock()
+	h.subscribers[sub] = nil
+	h.Unlock()
+	return nil
+}
+
 func (h *Server) Register() error {
 	var eps []*register.Endpoint
 	h.RLock()
 	for _, hdlr := range h.handlers {
-		hd, ok := hdlr.(*httpHandler)
-		if !ok {
-			continue
-		}
-		eps = append(eps, hd.Endpoints()...)
+		eps = append(eps, hdlr.Endpoints()...)
 	}
 	rsvc := h.rsvc
 	config := h.opts
@@ -311,6 +342,21 @@ func (h *Server) Register() error {
 	service.Nodes[0].Metadata["protocol"] = "http"
 	service.Endpoints = eps
 
+	h.Lock()
+	subscriberList := make([]*httpSubscriber, 0, len(h.subscribers))
+	for e := range h.subscribers {
+		// Only advertise non internal subscribers
+		subscriberList = append(subscriberList, e)
+	}
+	sort.Slice(subscriberList, func(i, j int) bool {
+		return subscriberList[i].topic > subscriberList[j].topic
+	})
+
+	for _, e := range subscriberList {
+		service.Endpoints = append(service.Endpoints, e.Endpoints()...)
+	}
+	h.Unlock()
+
 	h.RLock()
 	registered := h.registered
 	h.RUnlock()
@@ -332,6 +378,7 @@ func (h *Server) Register() error {
 	}
 
 	h.Lock()
+
 	h.registered = true
 	h.rsvc = service
 	h.Unlock()
@@ -339,6 +386,35 @@ func (h *Server) Register() error {
 	return nil
 }
 
+func (h *Server) subscribe() error {
+	config := h.opts
+
+	for sb := range h.subscribers {
+		handler := h.createSubHandler(sb, config)
+		var opts []broker.SubscribeOption
+		if queue := sb.Options().Queue; len(queue) > 0 {
+			opts = append(opts, broker.SubscribeGroup(queue))
+		}
+
+		subCtx := config.Context
+		if cx := sb.Options().Context; cx != nil {
+			subCtx = cx
+		}
+		opts = append(opts, broker.SubscribeContext(subCtx))
+		opts = append(opts, broker.SubscribeAutoAck(sb.Options().AutoAck))
+		opts = append(opts, broker.SubscribeBodyOnly(sb.Options().BodyOnly))
+
+		sub, err := config.Broker.Subscribe(subCtx, sb.Topic(), handler, opts...)
+		if err != nil {
+			h.Unlock()
+			return err
+		}
+		h.subscribers[sb] = []broker.Subscriber{sub}
+	}
+
+	return nil
+}
+
 func (h *Server) Deregister() error {
 	h.RLock()
 	config := h.opts
@@ -366,6 +442,23 @@ func (h *Server) Deregister() error {
 	}
 
 	h.registered = false
+
+	subCtx := h.opts.Context
+	for sb, subs := range h.subscribers {
+		if cx := sb.Options().Context; cx != nil {
+			subCtx = cx
+		}
+
+		for _, sub := range subs {
+			config.Logger.Infof(config.Context, "Unsubscribing from topic: %s", sub.Topic())
+			if err := sub.Unsubscribe(subCtx); err != nil {
+				h.Unlock()
+				config.Logger.Errorf(config.Context, "failed to unsubscribe topic: %s, error: %v", sb.Topic(), err)
+				return err
+			}
+		}
+		h.subscribers[sb] = nil
+	}
 	h.Unlock()
 	return nil
 }
@@ -414,7 +507,7 @@ func (h *Server) Start() error {
 	if h.opts.Context != nil {
 		if hs, ok := h.opts.Context.Value(serverKey{}).(*http.Server); ok && hs != nil {
 			if hs.Handler == nil && h.hd != nil {
-				if hdlr, ok := h.hd.(http.Handler); ok {
+				if hdlr, ok := h.hd.Handler().(http.Handler); ok {
 					hs.Handler = hdlr
 					handler = hs.Handler
 				}
@@ -430,7 +523,7 @@ func (h *Server) Start() error {
 	case len(h.handlers) > 0 && h.hd != nil:
 		handler = h
 	case handler == nil && h.hd != nil:
-		if hdlr, ok := h.hd.(http.Handler); ok {
+		if hdlr, ok := h.hd.Handler().(http.Handler); ok {
 			handler = hdlr
 		}
 	}
@@ -439,6 +532,10 @@ func (h *Server) Start() error {
 		return fmt.Errorf("cant process with nil handler")
 	}
 
+	if err := config.Broker.Connect(h.opts.Context); err != nil {
+		return err
+	}
+
 	if err := config.RegisterCheck(h.opts.Context); err != nil {
 		if config.Logger.V(logger.ErrorLevel) {
 			config.Logger.Errorf(config.Context, "Server %s-%s register check error: %s", config.Name, config.ID, err)
@@ -449,6 +546,10 @@ func (h *Server) Start() error {
 		}
 	}
 
+	if err := h.subscribe(); err != nil {
+		return err
+	}
+
 	fn := handler
 
 	if h.opts.Context != nil {
@@ -536,6 +637,10 @@ func (h *Server) Start() error {
 			config.Logger.Errorf(config.Context, "Server deregister error: %s", err)
 		}
 
+		if err := config.Broker.Disconnect(config.Context); err != nil {
+			config.Logger.Errorf(config.Context, "Broker disconnect error: %s", err)
+		}
+
 		ch <- ts.Close()
 	}()
 
@@ -556,7 +661,7 @@ func (h *Server) Name() string {
 	return h.opts.Name
 }
 
-func NewServer(opts ...options.Option) *Server {
+func NewServer(opts ...server.Option) *Server {
 	options := server.NewOptions(opts...)
 	eh := DefaultErrorHandler
 	if v, ok := options.Context.Value(errorHandlerKey{}).(errorHandler); ok && v != nil {
@@ -565,6 +670,7 @@ func NewServer(opts ...options.Option) *Server {
 	return &Server{
 		opts:         options,
 		exit:         make(chan chan error),
+		subscribers:  make(map[*httpSubscriber][]broker.Subscriber),
 		errorHandler: eh,
 		pathHandlers: rhttp.NewTrie(),
 	}

message.go

@@ -1,8 +1,8 @@
 package http
 
 import (
-	"go.unistack.org/micro/v4/codec"
-	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v3/metadata"
 )
 
 type httpMessage struct {

options.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"net/http"
 
-	"go.unistack.org/micro/v4/options"
+	"go.unistack.org/micro/v3/server"
 )
 
 // SetError pass error to caller
@@ -79,24 +79,24 @@ func GetRspCode(ctx context.Context) int {
 type middlewareKey struct{}
 
 // Middleware passes http middlewares
-func Middleware(mw ...func(http.Handler) http.Handler) options.Option {
-	return options.ContextOption(middlewareKey{}, mw)
+func Middleware(mw ...func(http.Handler) http.Handler) server.Option {
+	return server.SetOption(middlewareKey{}, mw)
 }
 
 type serverKey struct{}
 
 // HTTPServer provide ability to pass *http.Server
-func HTTPServer(hs *http.Server) options.Option {
-	return options.ContextOption(serverKey{}, hs)
+func HTTPServer(hs *http.Server) server.Option {
+	return server.SetOption(serverKey{}, hs)
 }
 
-type errorHandler func(ctx context.Context, s interface{}, w http.ResponseWriter, r *http.Request, err error, status int)
+type errorHandler func(ctx context.Context, s server.Handler, w http.ResponseWriter, r *http.Request, err error, status int)
 
 type errorHandlerKey struct{}
 
 // ErrorHandler specifies handler for errors
-func ErrorHandler(fn errorHandler) options.Option {
-	return options.ContextOption(errorHandlerKey{}, fn)
+func ErrorHandler(fn errorHandler) server.Option {
+	return server.SetOption(errorHandlerKey{}, fn)
 }
 
 type (
@@ -107,18 +107,12 @@ type (
 )
 
 // PathHandler specifies http handler for path regexp
-func PathHandler(method, path string, handler http.HandlerFunc) options.Option {
-	return func(src interface{}) error {
-		vctx, err := options.Get(src, ".Context")
-		if err != nil {
-			return err
+func PathHandler(method, path string, handler http.HandlerFunc) server.Option {
+	return func(o *server.Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
 		}
-		ctx, ok := vctx.(context.Context)
-		if !ok {
-			return fmt.Errorf("invalid option")
-		}
-
-		v, ok := ctx.Value(pathHandlerKey{}).(*pathHandlerVal)
+		v, ok := o.Context.Value(pathHandlerKey{}).(*pathHandlerVal)
 		if !ok {
 			v = &pathHandlerVal{h: make(map[string]map[string]http.HandlerFunc)}
 		}
@@ -127,17 +121,16 @@ func PathHandler(method, path string, handler http.HandlerFunc) options.Option {
 			m = make(map[string]http.HandlerFunc)
 			v.h[method] = m
 		}
-		ctx = context.WithValue(ctx, pathHandlerKey{}, v)
 		m[path] = handler
-		return options.Set(src, ctx, ".Context")
+		o.Context = context.WithValue(o.Context, pathHandlerKey{}, v)
 	}
 }
 
 type registerRPCHandlerKey struct{}
 
 // RegisterRPCHandler registers compatibility endpoints with /ServiceName.ServiceEndpoint method POST
-func RegisterRPCHandler(b bool) options.Option {
-	return options.ContextOption(registerRPCHandlerKey{}, b)
+func RegisterRPCHandler(b bool) server.Option {
+	return server.SetOption(registerRPCHandlerKey{}, b)
 }
 
 type handlerEndpointsKey struct{}
@@ -150,8 +143,8 @@ type EndpointMetadata struct {
 	Stream bool
 }
 
-func HandlerEndpoints(md []EndpointMetadata) options.Option {
-	return options.ContextOption(handlerEndpointsKey{}, md)
+func HandlerEndpoints(md []EndpointMetadata) server.HandlerOption {
+	return server.SetHandlerOption(handlerEndpointsKey{}, md)
 }
 
 type handlerOptions struct {

request.go

@@ -3,12 +3,15 @@ package http
 import (
 	"io"
 
-	"go.unistack.org/micro/v4/codec"
-	"go.unistack.org/micro/v4/metadata"
-	"go.unistack.org/micro/v4/server"
+	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/server"
 )
 
-var _ server.Request = &rpcRequest{}
+var (
+	_ server.Request = &rpcRequest{}
+	_ server.Message = &rpcMessage{}
+)
 
 type rpcRequest struct {
 	rw          io.ReadWriter
@@ -22,6 +25,14 @@ type rpcRequest struct {
 	stream      bool
 }
 
+type rpcMessage struct {
+	payload     interface{}
+	codec       codec.Codec
+	header      metadata.Metadata
+	topic       string
+	contentType string
+}
+
 func (r *rpcRequest) ContentType() string {
 	return r.contentType
 }
@@ -61,3 +72,23 @@ func (r *rpcRequest) Stream() bool {
 func (r *rpcRequest) Body() interface{} {
 	return r.payload
 }
+
+func (r *rpcMessage) ContentType() string {
+	return r.contentType
+}
+
+func (r *rpcMessage) Topic() string {
+	return r.topic
+}
+
+func (r *rpcMessage) Body() interface{} {
+	return r.payload
+}
+
+func (r *rpcMessage) Header() metadata.Metadata {
+	return r.header
+}
+
+func (r *rpcMessage) Codec() codec.Codec {
+	return r.codec
+}

server.go

@@ -7,11 +7,9 @@ import (
 	"unicode"
 	"unicode/utf8"
 
-	"go.unistack.org/micro/v4/server"
+	"go.unistack.org/micro/v3/server"
 )
 
-var typeOfError = reflect.TypeOf((*error)(nil)).Elem()
-
 type methodType struct {
 	ArgType     reflect.Type
 	ReplyType   reflect.Type

subscriber.go

@@ -0,0 +1,208 @@
+package http
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"reflect"
+	"strings"
+
+	"go.unistack.org/micro/v3/broker"
+	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/register"
+	"go.unistack.org/micro/v3/server"
+)
+
+var typeOfError = reflect.TypeOf((*error)(nil)).Elem()
+
+type handler struct {
+	reqType reflect.Type
+	ctxType reflect.Type
+	method  reflect.Value
+}
+
+type httpSubscriber struct {
+	topic      string
+	rcvr       reflect.Value
+	typ        reflect.Type
+	subscriber interface{}
+	handlers   []*handler
+	endpoints  []*register.Endpoint
+	opts       server.SubscriberOptions
+}
+
+func newSubscriber(topic string, sub interface{}, opts ...server.SubscriberOption) server.Subscriber {
+	options := server.NewSubscriberOptions(opts...)
+
+	var endpoints []*register.Endpoint
+	var handlers []*handler
+
+	if typ := reflect.TypeOf(sub); typ.Kind() == reflect.Func {
+		h := &handler{
+			method: reflect.ValueOf(sub),
+		}
+
+		switch typ.NumIn() {
+		case 1:
+			h.reqType = typ.In(0)
+		case 2:
+			h.ctxType = typ.In(0)
+			h.reqType = typ.In(1)
+		}
+
+		handlers = append(handlers, h)
+		ep := &register.Endpoint{
+			Name:     "Func",
+			Request:  register.ExtractSubValue(typ),
+			Metadata: metadata.New(2),
+		}
+		ep.Metadata.Set("topic", topic)
+		ep.Metadata.Set("subscriber", "true")
+		endpoints = append(endpoints, ep)
+	} else {
+		hdlr := reflect.ValueOf(sub)
+		name := reflect.Indirect(hdlr).Type().Name()
+
+		for m := 0; m < typ.NumMethod(); m++ {
+			method := typ.Method(m)
+			h := &handler{
+				method: method.Func,
+			}
+
+			switch method.Type.NumIn() {
+			case 2:
+				h.reqType = method.Type.In(1)
+			case 3:
+				h.ctxType = method.Type.In(1)
+				h.reqType = method.Type.In(2)
+			}
+
+			handlers = append(handlers, h)
+			ep := &register.Endpoint{
+				Name:     name + "." + method.Name,
+				Request:  register.ExtractSubValue(method.Type),
+				Metadata: metadata.New(2),
+			}
+			ep.Metadata.Set("topic", topic)
+			ep.Metadata.Set("subscriber", "true")
+			endpoints = append(endpoints, ep)
+		}
+	}
+
+	return &httpSubscriber{
+		rcvr:       reflect.ValueOf(sub),
+		typ:        reflect.TypeOf(sub),
+		topic:      topic,
+		subscriber: sub,
+		handlers:   handlers,
+		endpoints:  endpoints,
+		opts:       options,
+	}
+}
+
+func (s *Server) createSubHandler(sb *httpSubscriber, opts server.Options) broker.Handler {
+	return func(p broker.Event) error {
+		msg := p.Message()
+		ct := msg.Header["Content-Type"]
+		cf, err := s.newCodec(ct)
+		if err != nil {
+			return err
+		}
+
+		hdr := metadata.Copy(msg.Header)
+		delete(hdr, "Content-Type")
+		ctx := metadata.NewIncomingContext(context.Background(), hdr)
+
+		results := make(chan error, len(sb.handlers))
+
+		for i := 0; i < len(sb.handlers); i++ {
+			handler := sb.handlers[i]
+
+			var isVal bool
+			var req reflect.Value
+
+			if handler.reqType.Kind() == reflect.Ptr {
+				req = reflect.New(handler.reqType.Elem())
+			} else {
+				req = reflect.New(handler.reqType)
+				isVal = true
+			}
+			if isVal {
+				req = req.Elem()
+			}
+
+			buf := bytes.NewBuffer(msg.Body)
+
+			if err := cf.ReadHeader(buf, &codec.Message{}, codec.Event); err != nil {
+				return err
+			}
+
+			if err := cf.ReadBody(buf, req.Interface()); err != nil {
+				return err
+			}
+
+			fn := func(ctx context.Context, msg server.Message) error {
+				var vals []reflect.Value
+				if sb.typ.Kind() != reflect.Func {
+					vals = append(vals, sb.rcvr)
+				}
+				if handler.ctxType != nil {
+					vals = append(vals, reflect.ValueOf(ctx))
+				}
+
+				vals = append(vals, reflect.ValueOf(msg.Body()))
+
+				returnValues := handler.method.Call(vals)
+				if err := returnValues[0].Interface(); err != nil {
+					return err.(error)
+				}
+				return nil
+			}
+
+			for i := len(opts.SubWrappers); i > 0; i-- {
+				fn = opts.SubWrappers[i-1](fn)
+			}
+
+			go func() {
+				results <- fn(ctx, &httpMessage{
+					topic:       sb.topic,
+					contentType: ct,
+					payload:     req.Interface(),
+					header:      msg.Header,
+					codec:       cf,
+				})
+			}()
+		}
+
+		var errors []string
+
+		for i := 0; i < len(sb.handlers); i++ {
+			if err := <-results; err != nil {
+				errors = append(errors, err.Error())
+			}
+		}
+
+		if len(errors) > 0 {
+			return fmt.Errorf("subscriber error: %s", strings.Join(errors, "\n"))
+		}
+
+		return nil
+	}
+}
+
+func (s *httpSubscriber) Topic() string {
+	return s.topic
+}
+
+func (s *httpSubscriber) Subscriber() interface{} {
+	return s.subscriber
+}
+
+func (s *httpSubscriber) Endpoints() []*register.Endpoint {
+	return s.endpoints
+}
+
+func (s *httpSubscriber) Options() server.SubscriberOptions {
+	return s.opts
+}

util.go

@@ -5,8 +5,8 @@ import (
 	"net/http"
 	"strings"
 
-	"go.unistack.org/micro/v4/metadata"
-	rutil "go.unistack.org/micro/v4/util/reflect"
+	"go.unistack.org/micro/v3/metadata"
+	rutil "go.unistack.org/micro/v3/util/reflect"
 )
 
 func FillRequest(ctx context.Context, req interface{}, opts ...FillRequestOption) error {

util_test.go

@@ -7,7 +7,7 @@ import (
 	"strings"
 	"testing"
 
-	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v3/metadata"
 )
 
 func TestFillrequest(t *testing.T) {