Merge pull request 'dont init twice tls listener' (#167) from tls into v3

Reviewed-on: #167

.github/dependabot.yml

@@ -0,0 +1,19 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+
+  # Maintain dependencies for Golang
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: "daily"

.github/renovate.json

@@ -1,20 +0,0 @@
-{
-  "extends": [
-    "config:base"
-  ],
-  "postUpdateOptions": ["gomodTidy"],
-  "packageRules": [
-    {
-      "matchUpdateTypes": ["minor", "patch", "pin", "digest"],
-      "automerge": true
-    },
-    {
-      "groupName": "all deps",
-      "separateMajorMinor": true,
-      "groupSlug": "all",
-      "packagePatterns": [
-        "*"
-      ]
-    }
-  ]
-}

.github/stale.sh

@@ -1,13 +0,0 @@
-#!/bin/bash -ex
-
-export PATH=$PATH:$(pwd)/bin
-export GO111MODULE=on
-export GOBIN=$(pwd)/bin
-
-#go get github.com/rvflash/goup@v0.4.1
-
-#goup -v ./...
-#go get github.com/psampaz/go-mod-outdated@v0.6.0
-go list -u -m -mod=mod -json all | go-mod-outdated -update -direct -ci || true
-
-#go list -u -m -json all | go-mod-outdated -update

.github/workflows/autoapprove.yml

@@ -0,0 +1,20 @@
+name: "autoapprove"
+
+on:
+  pull_request_target:
+    types: [assigned, opened, synchronize, reopened]
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  autoapprove:
+    runs-on: ubuntu-latest
+    steps:
+      - name: approve
+        uses: hmarr/auto-approve-action@v3
+        if: github.actor == 'vtolstov' || github.actor == 'dependabot[bot]'
+        id: approve
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/automerge.yml

@@ -0,0 +1,21 @@
+name: "automerge"
+
+on:
+  pull_request_target:
+    types: [assigned, opened, synchronize, reopened]
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  automerge:
+    runs-on: ubuntu-latest
+    if: github.actor == 'vtolstov'
+    steps:
+      - name: merge
+        id: merge
+        run: gh pr merge --auto --merge "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GITHUB_TOKEN: ${{secrets.TOKEN}}

.github/workflows/build.yml

@@ -3,19 +3,20 @@ on:
  push:
     branches:
     - master
+    - v3
 jobs:
   test:
     name: test
     runs-on: ubuntu-latest
     steps:
     - name: setup
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v3
       with:
-        go-version: 1.16
+        go-version: 1.17
     - name: checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
     - name: cache
-      uses: actions/cache@v2
+      uses: actions/cache@v3
       with:
         path: ~/go/pkg/mod
         key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
@@ -31,9 +32,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: lint
-        uses: golangci/golangci-lint-action@v2
+        uses: golangci/golangci-lint-action@v3.4.0
         continue-on-error: true
         with:
           # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.

.github/workflows/codeql-analysis.yml

@@ -0,0 +1,78 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "codeql"
+
+on:
+  workflow_run:
+    workflows: ["prbuild"]
+    types:
+      - completed
+  push:
+    branches: [ master, v3 ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ master, v3 ]
+  schedule:
+    - cron: '34 1 * * 0'
+
+jobs:
+  analyze:
+    name: analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'go' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python' ]
+        # Learn more:
+        # https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed
+
+    steps:
+    - name: checkout
+      uses: actions/checkout@v3
+    - name: setup
+      uses: actions/setup-go@v3
+      with:
+        go-version: 1.17
+    # Initializes the CodeQL tools for scanning.
+    - name: init
+      uses: github/codeql-action/init@v2
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+        # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: autobuild
+      uses: github/codeql-action/autobuild@v2
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 https://git.io/JvXDl
+
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+    #    and modify them (or add more) to build your code if your project
+    #    uses a compiled language
+
+    #- run: |
+    #   make bootstrap
+    #   make release
+
+    - name: analyze
+      uses: github/codeql-action/analyze@v2

.github/workflows/dependabot-automerge.yml

@@ -0,0 +1,27 @@
+name: "dependabot-automerge"
+
+on:
+  pull_request_target:
+    types: [assigned, opened, synchronize, reopened]
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  automerge:
+    runs-on: ubuntu-latest
+    if: github.actor == 'dependabot[bot]'
+    steps:
+      - name: metadata
+        id: metadata
+        uses: dependabot/fetch-metadata@v1.3.6
+        with:
+          github-token: "${{ secrets.TOKEN }}"
+      - name: merge
+        id: merge
+        if: ${{contains(steps.metadata.outputs.dependency-names, 'go.unistack.org')}}
+        run: gh pr merge --auto --merge "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GITHUB_TOKEN: ${{secrets.TOKEN}}

.github/workflows/pr.yml

@@ -3,19 +3,20 @@ on:
   pull_request:
     branches:
     - master
+    - v3
 jobs:
   test:
     name: test
     runs-on: ubuntu-latest
     steps:
     - name: setup
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v3
       with:
-        go-version: 1.16
+        go-version: 1.17
     - name: checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
     - name: cache
-      uses: actions/cache@v2
+      uses: actions/cache@v3
       with:
         path: ~/go/pkg/mod
         key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
@@ -31,9 +32,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: lint
-        uses: golangci/golangci-lint-action@v2
+        uses: golangci/golangci-lint-action@v3.4.0
         continue-on-error: true
         with:
           # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.

.golangci.yml

@@ -0,0 +1,44 @@
+run:
+  concurrency: 4
+  deadline: 5m
+  issues-exit-code: 1
+  tests: true
+
+linters-settings:
+  govet:
+    check-shadowing: true
+    enable:
+      - fieldalignment
+
+linters:
+  enable:
+    - govet
+    - deadcode
+    - errcheck
+    - govet
+    - ineffassign
+    - staticcheck
+    - structcheck
+    - typecheck
+    - unused
+    - varcheck
+    - bodyclose
+    - gci
+    - goconst
+    - gocritic
+    - gosimple
+    - gofmt
+    - gofumpt
+    - goimports
+    - golint
+    - gosec
+    - makezero
+    - misspell
+    - nakedret
+    - nestif
+    - nilerr
+    - noctx
+    - prealloc
+    - unconvert
+    - unparam
+  disable-all: false

codec.go

@@ -3,25 +3,14 @@ package grpc
 import (
 	"io"
 
-	"github.com/unistack-org/micro/v3/codec"
-	"google.golang.org/grpc"
+	"go.unistack.org/micro/v3/codec"
 	"google.golang.org/grpc/encoding"
 )
 
-type wrapStream struct{ grpc.ServerStream }
-
-func (w *wrapStream) Write(d []byte) (int, error) {
-	n := len(d)
-	err := w.ServerStream.SendMsg(&codec.Frame{Data: d})
-	return n, err
-}
-
-func (w *wrapStream) Read(d []byte) (int, error) {
-	m := &codec.Frame{}
-	err := w.ServerStream.RecvMsg(m)
-	d = m.Data
-	return len(d), err
-}
+var (
+	_ codec.Codec    = &wrapGrpcCodec{}
+	_ encoding.Codec = &wrapMicroCodec{}
+)
 
 type wrapMicroCodec struct{ codec.Codec }
 
@@ -29,50 +18,54 @@ func (w *wrapMicroCodec) Name() string {
 	return w.Codec.String()
 }
 
+func (w *wrapMicroCodec) Marshal(v interface{}) ([]byte, error) {
+	return w.Codec.Marshal(v)
+}
+
+func (w *wrapMicroCodec) Unmarshal(d []byte, v interface{}) error {
+	return w.Codec.Unmarshal(d, v)
+}
+
 type wrapGrpcCodec struct{ encoding.Codec }
 
 func (w *wrapGrpcCodec) String() string {
 	return w.Codec.Name()
 }
 
-func (w *wrapGrpcCodec) Marshal(v interface{}) ([]byte, error) {
-	switch m := v.(type) {
-	case *codec.Frame:
+func (w *wrapGrpcCodec) Marshal(v interface{}, opts ...codec.Option) ([]byte, error) {
+	if m, ok := v.(*codec.Frame); ok {
 		return m.Data, nil
 	}
 	return w.Codec.Marshal(v)
 }
 
-func (w wrapGrpcCodec) Unmarshal(d []byte, v interface{}) error {
+func (w *wrapGrpcCodec) Unmarshal(d []byte, v interface{}, opts ...codec.Option) error {
 	if d == nil || v == nil {
 		return nil
 	}
-	switch m := v.(type) {
-	case *codec.Frame:
+	if m, ok := v.(*codec.Frame); ok {
 		m.Data = d
 		return nil
 	}
 	return w.Codec.Unmarshal(d, v)
 }
 
-func (g *wrapGrpcCodec) ReadHeader(conn io.Reader, m *codec.Message, mt codec.MessageType) error {
+func (w *wrapGrpcCodec) ReadHeader(conn io.Reader, m *codec.Message, mt codec.MessageType) error {
 	return nil
 }
 
-func (g *wrapGrpcCodec) ReadBody(conn io.Reader, v interface{}) error {
-	// caller has requested a frame
-	switch m := v.(type) {
-	case *codec.Frame:
+func (w *wrapGrpcCodec) ReadBody(conn io.Reader, v interface{}) error {
+	if m, ok := v.(*codec.Frame); ok {
 		_, err := conn.Read(m.Data)
 		return err
 	}
 	return codec.ErrInvalidMessage
 }
 
-func (g *wrapGrpcCodec) Write(conn io.Writer, m *codec.Message, v interface{}) error {
+func (w *wrapGrpcCodec) Write(conn io.Writer, m *codec.Message, v interface{}) error {
 	// if we don't have a body
 	if v != nil {
-		b, err := g.Marshal(v)
+		b, err := w.Marshal(v)
 		if err != nil {
 			return err
 		}

context.go

@@ -1,16 +0,0 @@
-package grpc
-
-import (
-	"context"
-
-	"github.com/unistack-org/micro/v3/server"
-)
-
-func setServerOption(k, v interface{}) server.Option {
-	return func(o *server.Options) {
-		if o.Context == nil {
-			o.Context = context.Background()
-		}
-		o.Context = context.WithValue(o.Context, k, v)
-	}
-}

error.go

@@ -6,25 +6,23 @@ import (
 	"net/http"
 	"os"
 
-	"github.com/unistack-org/micro/v3/errors"
+	"go.unistack.org/micro/v3/errors"
 	"google.golang.org/grpc/codes"
 )
 
-var (
-	errMapping = map[int32]codes.Code{
-		http.StatusOK:                  codes.OK,
-		http.StatusBadRequest:          codes.InvalidArgument,
-		http.StatusRequestTimeout:      codes.DeadlineExceeded,
-		http.StatusNotFound:            codes.NotFound,
-		http.StatusConflict:            codes.AlreadyExists,
-		http.StatusForbidden:           codes.PermissionDenied,
-		http.StatusUnauthorized:        codes.Unauthenticated,
-		http.StatusPreconditionFailed:  codes.FailedPrecondition,
-		http.StatusNotImplemented:      codes.Unimplemented,
-		http.StatusInternalServerError: codes.Internal,
-		http.StatusServiceUnavailable:  codes.Unavailable,
-	}
-)
+var errMapping = map[int32]codes.Code{
+	http.StatusOK:                  codes.OK,
+	http.StatusBadRequest:          codes.InvalidArgument,
+	http.StatusRequestTimeout:      codes.DeadlineExceeded,
+	http.StatusNotFound:            codes.NotFound,
+	http.StatusConflict:            codes.AlreadyExists,
+	http.StatusForbidden:           codes.PermissionDenied,
+	http.StatusUnauthorized:        codes.Unauthenticated,
+	http.StatusPreconditionFailed:  codes.FailedPrecondition,
+	http.StatusNotImplemented:      codes.Unimplemented,
+	http.StatusInternalServerError: codes.Internal,
+	http.StatusServiceUnavailable:  codes.Unavailable,
+}
 
 // convertCode converts a standard Go error into its canonical code. Note that
 // this is only used to translate the error returned by the server applications.
@@ -60,8 +58,7 @@ func microError(err error) codes.Code {
 	}
 
 	var ec int32
-	switch verr := err.(type) {
-	case *errors.Error:
+	if verr, ok := err.(*errors.Error); ok {
 		ec = verr.Code
 	}
 

go.mod

@@ -1,14 +1,11 @@
-module github.com/unistack-org/micro-server-grpc/v3
+module go.unistack.org/micro-server-grpc/v3
 
-go 1.15
+go 1.16
 
 require (
 	github.com/golang/protobuf v1.5.2
-	github.com/unistack-org/micro/v3 v3.3.13
-	golang.org/x/net v0.0.0-20210415231046-e915ea6b2b7d
-	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
-	google.golang.org/grpc v1.37.0
-	google.golang.org/protobuf v1.26.0
+	go.unistack.org/micro/v3 v3.10.14
+	golang.org/x/net v0.5.0
+	google.golang.org/grpc v1.52.3
+	google.golang.org/protobuf v1.28.1
 )
-
-//replace github.com/unistack-org/micro/v3 => ../../micro

grpc.go

@@ -1,5 +1,5 @@
 // Package grpc provides a grpc server
-package grpc
+package grpc // import "go.unistack.org/micro-server-grpc/v3"
 
 import (
 	"context"
@@ -14,61 +14,54 @@ import (
 	"sync"
 	"time"
 
+	// nolint: staticcheck
 	oldproto "github.com/golang/protobuf/proto"
-	"github.com/unistack-org/micro/v3/broker"
-	"github.com/unistack-org/micro/v3/codec"
-	"github.com/unistack-org/micro/v3/errors"
-	"github.com/unistack-org/micro/v3/logger"
-	metadata "github.com/unistack-org/micro/v3/metadata"
-	"github.com/unistack-org/micro/v3/register"
-	"github.com/unistack-org/micro/v3/server"
+	"go.unistack.org/micro/v3/broker"
+	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v3/errors"
+	"go.unistack.org/micro/v3/logger"
+	metadata "go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/register"
+	"go.unistack.org/micro/v3/server"
 	"golang.org/x/net/netutil"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
-	"google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/encoding"
 	gmetadata "google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/peer"
-	grpcreflect "google.golang.org/grpc/reflection/grpc_reflection_v1alpha"
 	"google.golang.org/grpc/status"
 	"google.golang.org/protobuf/proto"
 )
 
 const (
-	defaultContentType = "application/grpc"
+	DefaultContentType = "application/grpc"
 )
 
-type grpcServerReflection struct {
+/*
+type ServerReflection struct {
 	srv *grpc.Server
 	s   *serverReflectionServer
 }
+*/
 
-type grpcServer struct {
-	rpc  *rServer
-	srv  *grpc.Server
-	exit chan chan error
-	wg   *sync.WaitGroup
-
-	sync.RWMutex
-	opts        server.Options
+type Server struct {
 	handlers    map[string]server.Handler
+	srv         *grpc.Server
+	exit        chan chan error
+	wg          *sync.WaitGroup
+	rsvc        *register.Service
 	subscribers map[*subscriber][]broker.Subscriber
-	init        bool
-	// marks the serve as started
-	started bool
-	// used for first registration
+	rpc         *rServer
+	opts        server.Options
+	sync.RWMutex
+	started    bool
 	registered bool
-
 	reflection bool
-	// register service instance
-	rsvc *register.Service
-
-	codecs map[string]codec.Codec
 }
 
-func newGRPCServer(opts ...server.Option) server.Server {
+func newServer(opts ...server.Option) *Server {
 	// create a grpc server
-	g := &grpcServer{
+	g := &Server{
 		opts: server.NewOptions(opts...),
 		rpc: &rServer{
 			serviceMap: make(map[string]*service),
@@ -97,7 +90,7 @@ func (r grpcRouter) ServeRequest(ctx context.Context, req server.Request, rsp se
 
 */
 
-func (g *grpcServer) configure(opts ...server.Option) error {
+func (g *Server) configure(opts ...server.Option) error {
 	g.Lock()
 	defer g.Unlock()
 
@@ -114,9 +107,6 @@ func (g *grpcServer) configure(opts ...server.Option) error {
 	if err := g.opts.Tracer.Init(); err != nil {
 		return err
 	}
-	if err := g.opts.Auth.Init(); err != nil {
-		return err
-	}
 	if err := g.opts.Logger.Init(); err != nil {
 		return err
 	}
@@ -137,6 +127,10 @@ func (g *grpcServer) configure(opts ...server.Option) error {
 		}
 	}
 
+	for _, k := range g.opts.Codecs {
+		encoding.RegisterCodec(&wrapMicroCodec{k})
+	}
+
 	maxMsgSize := g.getMaxMsgSize()
 
 	gopts := []grpc.ServerOption{
@@ -145,12 +139,8 @@ func (g *grpcServer) configure(opts ...server.Option) error {
 		grpc.UnknownServiceHandler(g.handler),
 	}
 
-	if creds := g.getCredentials(); creds != nil {
-		gopts = append(gopts, grpc.Creds(creds))
-	}
-
 	if opts := g.getGrpcOptions(); opts != nil {
-		gopts = append(gopts, opts...)
+		gopts = append(opts, gopts...)
 	}
 
 	g.rsvc = nil
@@ -171,12 +161,10 @@ func (g *grpcServer) configure(opts ...server.Option) error {
 		return g.Start()
 	}
 
-	g.init = true
-
 	return nil
 }
 
-func (g *grpcServer) getMaxMsgSize() int {
+func (g *Server) getMaxMsgSize() int {
 	if g.opts.Context == nil {
 		return codec.DefaultMaxMsgSize
 	}
@@ -187,16 +175,7 @@ func (g *grpcServer) getMaxMsgSize() int {
 	return s
 }
 
-func (g *grpcServer) getCredentials() credentials.TransportCredentials {
-	if g.opts.Context != nil {
-		if v, ok := g.opts.Context.Value(tlsAuth{}).(*tls.Config); ok && v != nil {
-			return credentials.NewTLS(v)
-		}
-	}
-	return nil
-}
-
-func (g *grpcServer) getGrpcOptions() []grpc.ServerOption {
+func (g *Server) getGrpcOptions() []grpc.ServerOption {
 	if g.opts.Context == nil {
 		return nil
 	}
@@ -209,32 +188,7 @@ func (g *grpcServer) getGrpcOptions() []grpc.ServerOption {
 	return opts
 }
 
-func (g *grpcServer) handler(srv interface{}, stream grpc.ServerStream) (err error) {
-	defer func() {
-		if r := recover(); r != nil {
-			g.RLock()
-			config := g.opts
-			g.RUnlock()
-			if config.Logger.V(logger.ErrorLevel) {
-				config.Logger.Error(config.Context, "panic recovered: ", r)
-				config.Logger.Error(config.Context, string(debug.Stack()))
-			}
-			err = errors.InternalServerError(g.opts.Name, "panic recovered: %v", r)
-		} else if err != nil {
-			g.RLock()
-			config := g.opts
-			g.RUnlock()
-			if config.Logger.V(logger.ErrorLevel) {
-				config.Logger.Errorf(config.Context, "grpc handler got error: %s", err)
-			}
-		}
-	}()
-
-	if g.wg != nil {
-		g.wg.Add(1)
-		defer g.wg.Done()
-	}
-
+func (g *Server) handler(srv interface{}, stream grpc.ServerStream) (err error) {
 	fullMethod, ok := grpc.MethodFromServerStream(stream)
 	if !ok {
 		return status.Errorf(codes.Internal, "method does not exist in context")
@@ -245,6 +199,31 @@ func (g *grpcServer) handler(srv interface{}, stream grpc.ServerStream) (err err
 		return status.New(codes.InvalidArgument, err.Error()).Err()
 	}
 
+	defer func() {
+		if r := recover(); r != nil {
+			g.RLock()
+			config := g.opts
+			g.RUnlock()
+			if config.Logger.V(logger.ErrorLevel) {
+				config.Logger.Errorf(config.Context, "panic in %s.%s recovered: %v", serviceName, methodName, r)
+				config.Logger.Error(config.Context, string(debug.Stack()))
+			}
+			err = errors.InternalServerError(g.opts.Name, "panic in %s.%s recovered: %v", serviceName, methodName, r)
+		} else if err != nil {
+			g.RLock()
+			config := g.opts
+			g.RUnlock()
+			if config.Logger.V(logger.ErrorLevel) {
+				config.Logger.Errorf(config.Context, "grpc handler %s.%s got error: %s", serviceName, methodName, err)
+			}
+		}
+	}()
+
+	if g.wg != nil {
+		g.wg.Add(1)
+		defer g.wg.Done()
+	}
+
 	// get grpc metadata
 	gmd, ok := gmetadata.FromIncomingContext(stream.Context())
 	if !ok {
@@ -256,14 +235,33 @@ func (g *grpcServer) handler(srv interface{}, stream grpc.ServerStream) (err err
 		md.Set(k, strings.Join(v, ", "))
 	}
 
+	var td string
 	// timeout for server deadline
-	to, ok := md.Get("timeout")
-	if ok {
+	if v, ok := md.Get("timeout"); ok {
 		md.Del("timeout")
+		td = v
+	}
+	if v, ok := md.Get("Grpc-Timeout"); ok {
+		md.Del("Grpc-Timeout")
+		td = v[:len(v)-1]
+		switch v[len(v)-1:] {
+		case "S":
+			td += "s"
+		case "M":
+			td += "m"
+		case "H":
+			td += "h"
+		case "m":
+			td += "ms"
+		case "u":
+			td += "us"
+		case "n":
+			td += "ns"
+		}
 	}
 
 	// get content type
-	ct := defaultContentType
+	ct := DefaultContentType
 
 	if ctype, ok := md.Get("content-type"); ok {
 		ct = ctype
@@ -277,13 +275,13 @@ func (g *grpcServer) handler(srv interface{}, stream grpc.ServerStream) (err err
 
 	// get peer from context
 	if p, ok := peer.FromContext(stream.Context()); ok {
-		md["Remote"] = p.Addr.String()
+		md.Set("Remote", p.Addr.String())
 		ctx = peer.NewContext(ctx, p)
 	}
 
 	// set the timeout if we have it
-	if len(to) > 0 {
-		if n, err := strconv.ParseUint(to, 10, 64); err == nil {
+	if len(td) > 0 {
+		if n, err := strconv.ParseUint(td, 10, 64); err == nil {
 			var cancel context.CancelFunc
 			ctx, cancel = context.WithTimeout(ctx, time.Duration(n))
 			defer cancel()
@@ -294,148 +292,161 @@ func (g *grpcServer) handler(srv interface{}, stream grpc.ServerStream) (err err
 	svc := g.rpc.serviceMap[serviceName]
 	g.rpc.mu.RUnlock()
 
-	if svc == nil && g.reflection && methodName == "ServerReflectionInfo" {
-		rfl := &grpcServerReflection{srv: g.srv, s: &serverReflectionServer{s: g.srv}}
-		svc = &service{}
-		svc.typ = reflect.TypeOf(rfl)
-		svc.rcvr = reflect.ValueOf(rfl)
-		svc.name = reflect.Indirect(svc.rcvr).Type().Name()
-		svc.method = make(map[string]*methodType)
-		typ := reflect.TypeOf(rfl)
-		if me, ok := typ.MethodByName("ServerReflectionInfo"); ok {
-			g.rpc.mu.Lock()
-			ep, err := prepareEndpoint(me)
-			if ep != nil && err != nil {
-				svc.method["ServerReflectionInfo"] = ep
-			} else if err != nil {
-				return status.New(codes.Unimplemented, err.Error()).Err()
+	/*
+		if svc == nil && g.reflection && methodName == "ServerReflectionInfo" {
+			rfl := &ServerReflection{srv: g.srv, s: &serverReflectionServer{s: g.srv}}
+			svc = &service{}
+			svc.typ = reflect.TypeOf(rfl)
+			svc.rcvr = reflect.ValueOf(rfl)
+			svc.name = reflect.Indirect(svc.rcvr).Type().Name()
+			svc.method = make(map[string]*methodType)
+			typ := reflect.TypeOf(rfl)
+			if me, ok := typ.MethodByName("ServerReflectionInfo"); ok {
+				g.rpc.mu.Lock()
+				ep, err := prepareEndpoint(me)
+				if ep != nil && err != nil {
+					svc.method["ServerReflectionInfo"] = ep
+				} else if err != nil {
+					return status.New(codes.Unimplemented, err.Error()).Err()
+				}
+				g.rpc.mu.Unlock()
 			}
-			g.rpc.mu.Unlock()
 		}
-	}
+	*/
 
 	if svc == nil {
+		if g.opts.Context != nil {
+			if h, ok := g.opts.Context.Value(unknownServiceHandlerKey{}).(grpc.StreamHandler); ok {
+				return h(srv, stream)
+			}
+		}
 		return status.New(codes.Unimplemented, fmt.Sprintf("unknown service %s", serviceName)).Err()
 	}
 
 	mtype := svc.method[methodName]
 	if mtype == nil {
-		return status.New(codes.Unimplemented, fmt.Sprintf("unknown service %s.%s", serviceName, methodName)).Err()
+		if g.opts.Context != nil {
+			if h, ok := g.opts.Context.Value(unknownServiceHandlerKey{}).(grpc.StreamHandler); ok {
+				return h(srv, stream)
+			}
+		}
+		return status.New(codes.Unimplemented, fmt.Sprintf("unknown service method %s.%s", serviceName, methodName)).Err()
 	}
 
 	// process unary
 	if !mtype.stream {
-		return g.processRequest(stream, svc, mtype, ct, ctx)
+		return g.processRequest(ctx, stream, svc, mtype, ct)
 	}
 
 	// process stream
-	return g.processStream(stream, svc, mtype, ct, ctx)
+	return g.processStream(ctx, stream, svc, mtype, ct)
 }
 
-func (g *grpcServer) processRequest(stream grpc.ServerStream, service *service, mtype *methodType, ct string, ctx context.Context) error {
-	for {
-		var argv, replyv reflect.Value
+func (g *Server) processRequest(ctx context.Context, stream grpc.ServerStream, service *service, mtype *methodType, ct string) error {
+	// for {
+	var err error
+	var argv, replyv reflect.Value
 
-		// Decode the argument value.
-		argIsValue := false // if true, need to indirect before calling.
-		if mtype.ArgType.Kind() == reflect.Ptr {
-			argv = reflect.New(mtype.ArgType.Elem())
-		} else {
-			argv = reflect.New(mtype.ArgType)
-			argIsValue = true
-		}
-
-		// Unmarshal request
-		if err := stream.RecvMsg(argv.Interface()); err != nil {
-			return err
-		}
-
-		if argIsValue {
-			argv = argv.Elem()
-		}
-
-		// reply value
-		replyv = reflect.New(mtype.ReplyType.Elem())
-
-		function := mtype.method.Func
-		var returnValues []reflect.Value
-
-		cf, err := g.newCodec(ct)
-		if err != nil {
-			return errors.InternalServerError(g.opts.Name, err.Error())
-		}
-		b, err := cf.Marshal(argv.Interface())
-		if err != nil {
-			return err
-		}
-
-		// create a client.Request
-		r := &rpcRequest{
-			service:     g.opts.Name,
-			contentType: ct,
-			method:      fmt.Sprintf("%s.%s", service.name, mtype.method.Name),
-			body:        b,
-			payload:     argv.Interface(),
-		}
-		// define the handler func
-		fn := func(ctx context.Context, req server.Request, rsp interface{}) (err error) {
-			returnValues = function.Call([]reflect.Value{service.rcvr, mtype.prepareContext(ctx), reflect.ValueOf(argv.Interface()), reflect.ValueOf(rsp)})
-
-			// The return value for the method is an error.
-			if rerr := returnValues[0].Interface(); rerr != nil {
-				err = rerr.(error)
-			}
-
-			return err
-		}
-
-		// wrap the handler func
-		for i := len(g.opts.HdlrWrappers); i > 0; i-- {
-			fn = g.opts.HdlrWrappers[i-1](fn)
-		}
-
-		statusCode := codes.OK
-		statusDesc := ""
-		// execute the handler
-		if appErr := fn(ctx, r, replyv.Interface()); appErr != nil {
-			var errStatus *status.Status
-			switch verr := appErr.(type) {
-			case *errors.Error:
-				statusCode = microError(verr)
-				statusDesc = verr.Error()
-				errStatus = status.New(statusCode, statusDesc)
-			case proto.Message:
-				// user defined error that proto based we can attach it to grpc status
-				statusCode = convertCode(appErr)
-				statusDesc = appErr.Error()
-				errStatus, err = status.New(statusCode, statusDesc).WithDetails(oldproto.MessageV1(verr))
-				if err != nil {
-					return err
-				}
-			default:
-				g.RLock()
-				config := g.opts
-				g.RUnlock()
-				if config.Logger.V(logger.ErrorLevel) {
-					config.Logger.Warn(config.Context, "handler error will not be transferred properly, must return *errors.Error or proto.Message")
-				}
-				// default case user pass own error type that not proto based
-				statusCode = convertCode(verr)
-				statusDesc = verr.Error()
-				errStatus = status.New(statusCode, statusDesc)
-			}
-
-			return errStatus.Err()
-		}
-
-		if err := stream.SendMsg(replyv.Interface()); err != nil {
-			return err
-		}
-
-		return status.New(statusCode, statusDesc).Err()
+	// Decode the argument value.
+	argIsValue := false // if true, need to indirect before calling.
+	if mtype.ArgType.Kind() == reflect.Ptr {
+		argv = reflect.New(mtype.ArgType.Elem())
+	} else {
+		argv = reflect.New(mtype.ArgType)
+		argIsValue = true
 	}
+
+	// Unmarshal request
+	if err = stream.RecvMsg(argv.Interface()); err != nil {
+		return err
+	}
+
+	if argIsValue {
+		argv = argv.Elem()
+	}
+
+	// reply value
+	replyv = reflect.New(mtype.ReplyType.Elem())
+
+	function := mtype.method.Func
+	var returnValues []reflect.Value
+
+	// create a client.Request
+	r := &rpcRequest{
+		service:     g.opts.Name,
+		contentType: ct,
+		method:      fmt.Sprintf("%s.%s", service.name, mtype.method.Name),
+		endpoint:    fmt.Sprintf("%s.%s", service.name, mtype.method.Name),
+		payload:     argv.Interface(),
+	}
+	// define the handler func
+	fn := func(ctx context.Context, req server.Request, rsp interface{}) (err error) {
+		returnValues = function.Call([]reflect.Value{service.rcvr, mtype.prepareContext(ctx), argv, reflect.ValueOf(rsp)})
+
+		// The return value for the method is an error.
+		if rerr := returnValues[0].Interface(); rerr != nil {
+			err = rerr.(error)
+		}
+
+		return err
+	}
+
+	// wrap the handler func
+	for i := len(g.opts.HdlrWrappers); i > 0; i-- {
+		fn = g.opts.HdlrWrappers[i-1](fn)
+	}
+
+	statusCode := codes.OK
+	statusDesc := ""
+	// execute the handler
+	appErr := fn(ctx, r, replyv.Interface())
+	if outmd, ok := metadata.FromOutgoingContext(ctx); ok {
+		if err = stream.SendHeader(gmetadata.New(outmd)); err != nil {
+			return err
+		}
+	}
+	if appErr != nil {
+		var errStatus *status.Status
+		switch verr := appErr.(type) {
+		case *errors.Error:
+			statusCode = microError(verr)
+			statusDesc = verr.Error()
+			errStatus = status.New(statusCode, statusDesc)
+		case proto.Message:
+			// user defined error that proto based we can attach it to grpc status
+			statusCode = convertCode(appErr)
+			statusDesc = appErr.Error()
+			errStatus, err = status.New(statusCode, statusDesc).WithDetails(oldproto.MessageV1(verr))
+			if err != nil {
+				return err
+			}
+		case (interface{ GRPCStatus() *status.Status }):
+			errStatus = verr.GRPCStatus()
+		default:
+			g.RLock()
+			config := g.opts
+			g.RUnlock()
+			if config.Logger.V(logger.ErrorLevel) {
+				config.Logger.Warn(config.Context, "handler error will not be transferred properly, must return *errors.Error or proto.Message")
+			}
+			// default case user pass own error type that not proto based
+			statusCode = convertCode(verr)
+			statusDesc = verr.Error()
+			errStatus = status.New(statusCode, statusDesc)
+		}
+
+		return errStatus.Err()
+	}
+
+	if err := stream.SendMsg(replyv.Interface()); err != nil {
+		return err
+	}
+
+	return status.New(statusCode, statusDesc).Err()
+	//	}
 }
 
+/*
 type reflectStream struct {
 	stream server.Stream
 }
@@ -474,17 +485,19 @@ func (s *reflectStream) RecvMsg(m interface{}) error {
 	return s.stream.Recv(m)
 }
 
-func (g *grpcServerReflection) ServerReflectionInfo(ctx context.Context, stream server.Stream) error {
+func (g *ServerReflection) ServerReflectionInfo(ctx context.Context, stream server.Stream) error {
 	return g.s.ServerReflectionInfo(&reflectStream{stream})
 }
+*/
 
-func (g *grpcServer) processStream(stream grpc.ServerStream, service *service, mtype *methodType, ct string, ctx context.Context) error {
+func (g *Server) processStream(ctx context.Context, stream grpc.ServerStream, service *service, mtype *methodType, ct string) error {
 	opts := g.opts
 
 	r := &rpcRequest{
 		service:     opts.Name,
 		contentType: ct,
 		method:      fmt.Sprintf("%s.%s", service.name, mtype.method.Name),
+		endpoint:    fmt.Sprintf("%s.%s", service.name, mtype.method.Name),
 		stream:      true,
 	}
 
@@ -513,7 +526,13 @@ func (g *grpcServer) processStream(stream grpc.ServerStream, service *service, m
 	statusCode := codes.OK
 	statusDesc := ""
 
-	if appErr := fn(ctx, r, ss); appErr != nil {
+	appErr := fn(ctx, r, ss)
+	if outmd, ok := metadata.FromOutgoingContext(ctx); ok {
+		if err := stream.SendHeader(gmetadata.New(outmd)); err != nil {
+			return err
+		}
+	}
+	if appErr != nil {
 		var err error
 		var errStatus *status.Status
 		switch verr := appErr.(type) {
@@ -545,7 +564,7 @@ func (g *grpcServer) processStream(stream grpc.ServerStream, service *service, m
 	return status.New(statusCode, statusDesc).Err()
 }
 
-func (g *grpcServer) newCodec(ct string) (codec.Codec, error) {
+func (g *Server) newCodec(ct string) (codec.Codec, error) {
 	g.RLock()
 	defer g.RUnlock()
 
@@ -560,7 +579,7 @@ func (g *grpcServer) newCodec(ct string) (codec.Codec, error) {
 	return nil, codec.ErrUnknownContentType
 }
 
-func (g *grpcServer) Options() server.Options {
+func (g *Server) Options() server.Options {
 	g.RLock()
 	opts := g.opts
 	g.RUnlock()
@@ -568,18 +587,15 @@ func (g *grpcServer) Options() server.Options {
 	return opts
 }
 
-func (g *grpcServer) Init(opts ...server.Option) error {
-	if len(opts) == 0 && g.init {
-		return nil
-	}
+func (g *Server) Init(opts ...server.Option) error {
 	return g.configure(opts...)
 }
 
-func (g *grpcServer) NewHandler(h interface{}, opts ...server.HandlerOption) server.Handler {
-	return newRpcHandler(h, opts...)
+func (g *Server) NewHandler(h interface{}, opts ...server.HandlerOption) server.Handler {
+	return newRPCHandler(h, opts...)
 }
 
-func (g *grpcServer) Handle(h server.Handler) error {
+func (g *Server) Handle(h server.Handler) error {
 	if err := g.rpc.register(h.Handler()); err != nil {
 		return err
 	}
@@ -588,11 +604,11 @@ func (g *grpcServer) Handle(h server.Handler) error {
 	return nil
 }
 
-func (g *grpcServer) NewSubscriber(topic string, sb interface{}, opts ...server.SubscriberOption) server.Subscriber {
+func (g *Server) NewSubscriber(topic string, sb interface{}, opts ...server.SubscriberOption) server.Subscriber {
 	return newSubscriber(topic, sb, opts...)
 }
 
-func (g *grpcServer) Subscribe(sb server.Subscriber) error {
+func (g *Server) Subscribe(sb server.Subscriber) error {
 	sub, ok := sb.(*subscriber)
 	if !ok {
 		return fmt.Errorf("invalid subscriber: expected *subscriber")
@@ -616,7 +632,7 @@ func (g *grpcServer) Subscribe(sb server.Subscriber) error {
 	return nil
 }
 
-func (g *grpcServer) Register() error {
+func (g *Server) Register() error {
 	g.RLock()
 	rsvc := g.rsvc
 	config := g.opts
@@ -637,22 +653,18 @@ func (g *grpcServer) Register() error {
 
 	g.RLock()
 	// Maps are ordered randomly, sort the keys for consistency
-	var handlerList []string
-	for n, e := range g.handlers {
+	handlerList := make([]string, 0, len(g.handlers))
+	for n := range g.handlers {
 		// Only advertise non internal handlers
-		if !e.Options().Internal {
-			handlerList = append(handlerList, n)
-		}
+		handlerList = append(handlerList, n)
 	}
 
 	sort.Strings(handlerList)
 
-	var subscriberList []*subscriber
+	subscriberList := make([]*subscriber, 0, len(g.subscribers))
 	for e := range g.subscribers {
 		// Only advertise non internal subscribers
-		if !e.Options().Internal {
-			subscriberList = append(subscriberList, e)
-		}
+		subscriberList = append(subscriberList, e)
 	}
 	sort.Slice(subscriberList, func(i, j int) bool {
 		return subscriberList[i].topic > subscriberList[j].topic
@@ -668,7 +680,7 @@ func (g *grpcServer) Register() error {
 	g.RUnlock()
 
 	service.Nodes[0].Metadata["protocol"] = "grpc"
-	service.Nodes[0].Metadata["transport"] = "grpc"
+	service.Nodes[0].Metadata["transport"] = service.Nodes[0].Metadata["protocol"]
 	service.Endpoints = endpoints
 
 	g.RLock()
@@ -677,7 +689,7 @@ func (g *grpcServer) Register() error {
 
 	if !registered {
 		if config.Logger.V(logger.InfoLevel) {
-			config.Logger.Infof(config.Context, "Register [%s] Registering node: %s", config.Register.String(), service.Nodes[0].Id)
+			config.Logger.Infof(config.Context, "Register [%s] Registering node: %s", config.Register.String(), service.Nodes[0].ID)
 		}
 	}
 
@@ -694,37 +706,13 @@ func (g *grpcServer) Register() error {
 	g.Lock()
 	defer g.Unlock()
 
-	for sb := range g.subscribers {
-		handler := g.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))
-
-		if config.Logger.V(logger.InfoLevel) {
-			config.Logger.Infof(config.Context, "Subscribing to topic: %s", sb.Topic())
-		}
-		sub, err := config.Broker.Subscribe(subCtx, sb.Topic(), handler, opts...)
-		if err != nil {
-			return err
-		}
-		g.subscribers[sb] = []broker.Subscriber{sub}
-	}
-
 	g.registered = true
 	g.rsvc = service
 
 	return nil
 }
 
-func (g *grpcServer) Deregister() error {
+func (g *Server) Deregister() error {
 	var err error
 
 	g.RLock()
@@ -737,7 +725,7 @@ func (g *grpcServer) Deregister() error {
 	}
 
 	if config.Logger.V(logger.InfoLevel) {
-		config.Logger.Infof(config.Context, "Deregistering node: %s", service.Nodes[0].Id)
+		config.Logger.Infof(config.Context, "Deregistering node: %s", service.Nodes[0].ID)
 	}
 
 	if err := server.DefaultDeregisterFunc(service, config); err != nil {
@@ -778,7 +766,7 @@ func (g *grpcServer) Deregister() error {
 	return nil
 }
 
-func (g *grpcServer) Start() error {
+func (g *Server) Start() error {
 	g.RLock()
 	if g.started {
 		g.RUnlock()
@@ -788,18 +776,13 @@ func (g *grpcServer) Start() error {
 
 	config := g.Options()
 
-	for _, k := range config.Codecs {
-		encoding.RegisterCodec(&wrapMicroCodec{k})
-	}
-
 	// micro: config.Transport.Listen(config.Address)
 	var ts net.Listener
+	var err error
 
 	if l := config.Listener; l != nil {
 		ts = l
 	} else {
-		var err error
-
 		// check the tls config for secure connect
 		if tc := config.TLSConfig; tc != nil {
 			ts, err = tls.Listen("tcp", config.Address, tc)
@@ -829,7 +812,7 @@ func (g *grpcServer) Start() error {
 	// only connect if we're subscribed
 	if len(g.subscribers) > 0 {
 		// connect to the broker
-		if err := config.Broker.Connect(config.Context); err != nil {
+		if err = config.Broker.Connect(config.Context); err != nil {
 			if config.Logger.V(logger.ErrorLevel) {
 				config.Logger.Errorf(config.Context, "Broker [%s] connect error: %v", config.Broker.String(), err)
 			}
@@ -842,26 +825,31 @@ func (g *grpcServer) Start() error {
 	}
 
 	// use RegisterCheck func before register
-	if err := g.opts.RegisterCheck(config.Context); err != nil {
+	// nolint: nestif
+	if err = g.opts.RegisterCheck(config.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)
+			config.Logger.Errorf(config.Context, "Server %s-%s register check error: %s", config.Name, config.ID, err)
 		}
 	} else {
 		// announce self to the world
-		if err := g.Register(); err != nil {
+		if err = g.Register(); err != nil {
 			if config.Logger.V(logger.ErrorLevel) {
 				config.Logger.Errorf(config.Context, "Server register error: %v", err)
 			}
 		}
 	}
 
+	if err = g.subscribe(); err != nil {
+		return err
+	}
+
 	// micro: go ts.Accept(s.accept)
 	go func() {
-		if err := g.srv.Serve(ts); err != nil {
+		if err = g.srv.Serve(ts); err != nil {
 			if config.Logger.V(logger.ErrorLevel) {
 				config.Logger.Errorf(config.Context, "gRPC Server start error: %v", err)
 			}
-			if err := g.Stop(); err != nil {
+			if err = g.Stop(); err != nil {
 				if config.Logger.V(logger.ErrorLevel) {
 					config.Logger.Errorf(config.Context, "gRPC Server stop error: %v", err)
 				}
@@ -890,25 +878,26 @@ func (g *grpcServer) Start() error {
 				registered := g.registered
 				g.RUnlock()
 				rerr := g.opts.RegisterCheck(g.opts.Context)
+				// nolint: nestif
 				if rerr != nil && registered {
 					if config.Logger.V(logger.ErrorLevel) {
-						config.Logger.Errorf(config.Context, "Server %s-%s register check error: %s, deregister it", config.Name, config.Id, rerr)
+						config.Logger.Errorf(config.Context, "Server %s-%s register check error: %s, deregister it", config.Name, config.ID, rerr)
 					}
 					// deregister self in case of error
-					if err := g.Deregister(); err != nil {
+					if err = g.Deregister(); err != nil {
 						if config.Logger.V(logger.ErrorLevel) {
-							config.Logger.Errorf(config.Context, "Server %s-%s deregister error: %s", config.Name, config.Id, err)
+							config.Logger.Errorf(config.Context, "Server %s-%s deregister error: %s", config.Name, config.ID, err)
 						}
 					}
 				} else if rerr != nil && !registered {
 					if config.Logger.V(logger.ErrorLevel) {
-						config.Logger.Errorf(config.Context, "Server %s-%s register check error: %s", config.Name, config.Id, rerr)
+						config.Logger.Errorf(config.Context, "Server %s-%s register check error: %s", config.Name, config.ID, rerr)
 					}
 					continue
 				}
-				if err := g.Register(); err != nil {
+				if err = g.Register(); err != nil {
 					if config.Logger.V(logger.ErrorLevel) {
-						config.Logger.Errorf(config.Context, "Server %s-%s register error: %s", config.Name, config.Id, err)
+						config.Logger.Errorf(config.Context, "Server %s-%s register error: %s", config.Name, config.ID, err)
 					}
 				}
 			// wait for exit
@@ -918,9 +907,9 @@ func (g *grpcServer) Start() error {
 		}
 
 		// deregister self
-		if err := g.Deregister(); err != nil {
+		if err = g.Deregister(); err != nil {
 			if config.Logger.V(logger.ErrorLevel) {
-				config.Logger.Errorf(config.Context, "Server deregister error: ", err)
+				config.Logger.Errorf(config.Context, "Server deregister error: %v", err)
 			}
 		}
 
@@ -950,7 +939,7 @@ func (g *grpcServer) Start() error {
 			config.Logger.Infof(config.Context, "Broker [%s] Disconnected from %s", config.Broker.String(), config.Broker.Address())
 		}
 		// disconnect broker
-		if err := config.Broker.Disconnect(config.Context); err != nil {
+		if err = config.Broker.Disconnect(config.Context); err != nil {
 			if config.Logger.V(logger.ErrorLevel) {
 				config.Logger.Errorf(config.Context, "Broker [%s] disconnect error: %v", config.Broker.String(), err)
 			}
@@ -965,7 +954,38 @@ func (g *grpcServer) Start() error {
 	return nil
 }
 
-func (g *grpcServer) Stop() error {
+func (g *Server) subscribe() error {
+	config := g.opts
+
+	for sb := range g.subscribers {
+		handler := g.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))
+
+		if config.Logger.V(logger.InfoLevel) {
+			config.Logger.Infof(config.Context, "Subscribing to topic: %s", sb.Topic())
+		}
+		sub, err := config.Broker.Subscribe(subCtx, sb.Topic(), handler, opts...)
+		if err != nil {
+			return err
+		}
+		g.subscribers[sb] = []broker.Subscriber{sub}
+	}
+
+	return nil
+}
+
+func (g *Server) Stop() error {
 	g.RLock()
 	if !g.started {
 		g.RUnlock()
@@ -985,14 +1005,18 @@ func (g *grpcServer) Stop() error {
 	return err
 }
 
-func (g *grpcServer) String() string {
+func (g *Server) String() string {
 	return "grpc"
 }
 
-func (g *grpcServer) Name() string {
+func (g *Server) Name() string {
 	return g.opts.Name
 }
 
-func NewServer(opts ...server.Option) server.Server {
-	return newGRPCServer(opts...)
+func (g *Server) GRPCServer() *grpc.Server {
+	return g.srv
+}
+
+func NewServer(opts ...server.Option) *Server {
+	return newServer(opts...)
 }

handler.go

@@ -3,18 +3,18 @@ package grpc
 import (
 	"reflect"
 
-	"github.com/unistack-org/micro/v3/register"
-	"github.com/unistack-org/micro/v3/server"
+	"go.unistack.org/micro/v3/register"
+	"go.unistack.org/micro/v3/server"
 )
 
 type rpcHandler struct {
-	name      string
-	handler   interface{}
-	endpoints []*register.Endpoint
 	opts      server.HandlerOptions
+	handler   interface{}
+	name      string
+	endpoints []*register.Endpoint
 }
 
-func newRpcHandler(handler interface{}, opts ...server.HandlerOption) server.Handler {
+func newRPCHandler(handler interface{}, opts ...server.HandlerOption) server.Handler {
 	options := server.NewHandlerOptions(opts...)
 
 	typ := reflect.TypeOf(handler)

options.go

@@ -2,18 +2,19 @@ package grpc
 
 import (
 	"context"
-	"crypto/tls"
 
-	"github.com/unistack-org/micro/v3/server"
+	"go.unistack.org/micro/v3/server"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/encoding"
 )
 
-type codecsKey struct{}
-type grpcOptions struct{}
-type maxMsgSizeKey struct{}
-type tlsAuth struct{}
-type reflectionKey struct{}
+type (
+	codecsKey                struct{}
+	grpcOptions              struct{}
+	maxMsgSizeKey            struct{}
+	reflectionKey            struct{}
+	unknownServiceHandlerKey struct{}
+)
 
 // gRPC Codec to be used to encode/decode requests for a given content type
 func Codec(contentType string, c encoding.Codec) server.Option {
@@ -30,25 +31,24 @@ func Codec(contentType string, c encoding.Codec) server.Option {
 	}
 }
 
-// AuthTLS should be used to setup a secure authentication using TLS
-func AuthTLS(t *tls.Config) server.Option {
-	return setServerOption(tlsAuth{}, t)
-}
-
 // Options to be used to configure gRPC options
 func Options(opts ...grpc.ServerOption) server.Option {
-	return setServerOption(grpcOptions{}, opts)
+	return server.SetOption(grpcOptions{}, opts)
 }
 
 //
 // MaxMsgSize set the maximum message in bytes the server can receive and
-// send.  Default maximum message size is 4 MB.
-//
+// send. Default maximum message size is 4 MB.
 func MaxMsgSize(s int) server.Option {
-	return setServerOption(maxMsgSizeKey{}, s)
+	return server.SetOption(maxMsgSizeKey{}, s)
 }
 
 // Reflection enables reflection support in grpc server
 func Reflection(b bool) server.Option {
-	return setServerOption(reflectionKey{}, b)
+	return server.SetOption(reflectionKey{}, b)
+}
+
+// UnknownServiceHandler enables support for all services
+func UnknownServiceHandler(h grpc.StreamHandler) server.Option {
+	return server.SetOption(unknownServiceHandlerKey{}, h)
 }

reflection.go

@@ -1,3 +1,5 @@
+// +build ignore
+
 /*
  *
  * Copyright 2016 gRPC authors.

request.go

@@ -3,31 +3,34 @@ package grpc
 import (
 	"io"
 
-	"github.com/unistack-org/micro/v3/codec"
-	"github.com/unistack-org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/server"
+)
+
+var (
+	_ server.Request = &rpcRequest{}
+	_ server.Message = &rpcMessage{}
 )
 
 type rpcRequest struct {
 	rw          io.ReadWriter
-	service     string
-	method      string
-	endpoint    string
-	target      string
-	contentType string
+	payload     interface{}
 	codec       codec.Codec
 	header      metadata.Metadata
-	body        []byte
+	method      string
+	endpoint    string
+	contentType string
+	service     string
 	stream      bool
-	payload     interface{}
 }
 
 type rpcMessage struct {
+	payload     interface{}
+	codec       codec.Codec
+	header      metadata.Metadata
 	topic       string
 	contentType string
-	payload     interface{}
-	header      metadata.Metadata
-	body        []byte
-	codec       codec.Codec
 }
 
 func (r *rpcRequest) ContentType() string {
@@ -43,7 +46,7 @@ func (r *rpcRequest) Method() string {
 }
 
 func (r *rpcRequest) Endpoint() string {
-	return r.method
+	return r.endpoint
 }
 
 func (r *rpcRequest) Codec() codec.Codec {
@@ -78,7 +81,7 @@ func (r *rpcMessage) Topic() string {
 	return r.topic
 }
 
-func (r *rpcMessage) Payload() interface{} {
+func (r *rpcMessage) Body() interface{} {
 	return r.payload
 }
 
@@ -86,10 +89,6 @@ func (r *rpcMessage) Header() metadata.Metadata {
 	return r.header
 }
 
-func (r *rpcMessage) Body() []byte {
-	return r.body
-}
-
 func (r *rpcMessage) Codec() codec.Codec {
 	return r.codec
 }

response.go

@@ -3,18 +3,17 @@ package grpc
 import (
 	"io"
 
-	"github.com/unistack-org/micro/v3/codec"
-	"github.com/unistack-org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/server"
 )
 
+var _ server.Response = &rpcResponse{}
+
 type rpcResponse struct {
-	rw       io.ReadWriter
-	header   metadata.Metadata
-	codec    codec.Codec
-	endpoint string
-	service  string
-	method   string
-	target   string
+	rw     io.ReadWriter
+	header metadata.Metadata
+	codec  codec.Codec
 }
 
 func (r *rpcResponse) Codec() codec.Codec {

server.go

@@ -14,37 +14,35 @@ import (
 	"unicode"
 	"unicode/utf8"
 
-	"github.com/unistack-org/micro/v3/server"
+	"go.unistack.org/micro/v3/server"
 )
 
-var (
-	// Precompute the reflect type for error. Can't use error directly
-	// because Typeof takes an empty interface value. This is annoying.
-	typeOfError = reflect.TypeOf((*error)(nil)).Elem()
-)
+// Precompute the reflect type for error. Can't use error directly
+// because Typeof takes an empty interface value. This is annoying.
+var typeOfError = reflect.TypeOf((*error)(nil)).Elem()
 
 type methodType struct {
-	method      reflect.Method
 	ArgType     reflect.Type
 	ReplyType   reflect.Type
 	ContextType reflect.Type
+	method      reflect.Method
 	stream      bool
 }
 
-type reflectionType func(context.Context, server.Stream) error
+// type reflectionType func(context.Context, server.Stream) error
 
 type service struct {
-	name   string                 // name of service
-	rcvr   reflect.Value          // receiver of methods for the service
-	typ    reflect.Type           // type of the receiver
-	method map[string]*methodType // registered methods
+	typ    reflect.Type
+	method map[string]*methodType
+	rcvr   reflect.Value
+	name   string
 }
 
 // server represents an RPC Server.
 type rServer struct {
-	mu         sync.RWMutex // protects the serviceMap
 	serviceMap map[string]*service
-	reflection bool
+	mu         sync.RWMutex
+	// reflection bool
 }
 
 // Is this an exported - upper case - name?
@@ -91,15 +89,14 @@ func prepareEndpoint(method reflect.Method) (*methodType, error) {
 		return nil, fmt.Errorf("method %v of %v has wrong number of ins: %v", mname, mtype, mtype.NumIn())
 	}
 
-	if stream {
+	switch stream {
+	case true:
 		// check stream type
 		streamType := reflect.TypeOf((*server.Stream)(nil)).Elem()
 		if !argType.Implements(streamType) {
 			return nil, fmt.Errorf("%v argument does not implement Streamer interface: %v", mname, argType)
 		}
-	} else {
-		// if not stream check the replyType
-
+	default:
 		// First arg need not be a pointer.
 		if !isExportedOrBuiltinType(argType) {
 			return nil, fmt.Errorf("%v argument type not exported: %v", mname, argType)

stream.go

@@ -3,7 +3,7 @@ package grpc
 import (
 	"context"
 
-	"github.com/unistack-org/micro/v3/server"
+	"go.unistack.org/micro/v3/server"
 	"google.golang.org/grpc"
 )
 

subscriber.go

@@ -7,22 +7,18 @@ import (
 	"runtime/debug"
 	"strings"
 
-	"github.com/unistack-org/micro/v3/broker"
-	"github.com/unistack-org/micro/v3/errors"
-	"github.com/unistack-org/micro/v3/logger"
-	"github.com/unistack-org/micro/v3/metadata"
-	"github.com/unistack-org/micro/v3/register"
-	"github.com/unistack-org/micro/v3/server"
-)
-
-const (
-	subSig = "func(context.Context, interface{}) error"
+	"go.unistack.org/micro/v3/broker"
+	"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"
 )
 
 type handler struct {
-	method  reflect.Value
 	reqType reflect.Type
 	ctxType reflect.Type
+	method  reflect.Value
 }
 
 type subscriber struct {
@@ -106,7 +102,7 @@ func newSubscriber(topic string, sub interface{}, opts ...server.SubscriberOptio
 	}
 }
 
-func (g *grpcServer) createSubHandler(sb *subscriber, opts server.Options) broker.Handler {
+func (g *Server) createSubHandler(sb *subscriber, opts server.Options) broker.Handler {
 	return func(p broker.Event) (err error) {
 		defer func() {
 			if r := recover(); r != nil {
@@ -126,8 +122,8 @@ func (g *grpcServer) createSubHandler(sb *subscriber, opts server.Options) broke
 
 		ct := msg.Header["Content-Type"]
 		if len(ct) == 0 {
-			msg.Header["Content-Type"] = defaultContentType
-			ct = defaultContentType
+			msg.Header["Content-Type"] = DefaultContentType
+			ct = DefaultContentType
 		}
 		cf, err := g.newCodec(ct)
 		if err != nil {
@@ -175,7 +171,7 @@ func (g *grpcServer) createSubHandler(sb *subscriber, opts server.Options) broke
 					vals = append(vals, reflect.ValueOf(ctx))
 				}
 
-				vals = append(vals, reflect.ValueOf(msg.Payload()))
+				vals = append(vals, reflect.ValueOf(msg.Body()))
 
 				returnValues := handler.method.Call(vals)
 				if rerr := returnValues[0].Interface(); rerr != nil {
@@ -195,14 +191,13 @@ func (g *grpcServer) createSubHandler(sb *subscriber, opts server.Options) broke
 				if g.wg != nil {
 					defer g.wg.Done()
 				}
-				err := fn(ctx, &rpcMessage{
+				cerr := fn(ctx, &rpcMessage{
 					topic:       sb.topic,
 					contentType: ct,
 					payload:     req.Interface(),
 					header:      msg.Header,
-					body:        msg.Body,
 				})
-				results <- err
+				results <- cerr
 			}()
 		}
 		var errors []string

util.go

@@ -39,6 +39,7 @@ func serviceMethod(m string) (string, string, error) {
 	return parts[0], parts[1], nil
 }
 
+/*
 // ServiceFromMethod returns the service
 // /service.Foo/Bar => service
 func serviceFromMethod(m string) string {
@@ -55,3 +56,4 @@ func serviceFromMethod(m string) string {
 	parts = strings.Split(parts[1], ".")
 	return strings.Join(parts[:len(parts)-1], ".")
 }
+*/