fix proto

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
2020-12-10 15:59:43 +03:00
18 changed files with 1061 additions and 409 deletions
--- a/.github/renovate.json
+++ b/.github/renovate.json
@@ -1,19 +0,0 @@
-{
-  "extends": [
-    "config:base"
-  ],
-  "packageRules": [
-    {
-      "matchUpdateTypes": ["minor", "patch", "pin", "digest"],
-      "automerge": true
-    },
-    {
-      "groupName": "all deps",
-      "separateMajorMinor": true,
-      "groupSlug": "all",
-      "packagePatterns": [
-        "*"
-      ]
-    }
-  ]
-}
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -9,9 +9,9 @@ jobs:
    runs-on: ubuntu-latest
    steps:
    - name: setup
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v1
      with:
-        go-version: 1.16
+        go-version: 1.15
    - name: checkout
      uses: actions/checkout@v2
    - name: cache
@@ -33,7 +33,7 @@ jobs:
      - name: checkout
        uses: actions/checkout@v2
      - name: lint
-        uses: golangci/golangci-lint-action@v2
+        uses: golangci/golangci-lint-action@v1
        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.
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -9,9 +9,9 @@ jobs:
    runs-on: ubuntu-latest
    steps:
    - name: setup
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v1
      with:
-        go-version: 1.16
+        go-version: 1.15
    - name: checkout
      uses: actions/checkout@v2
    - name: cache
@@ -33,7 +33,7 @@ jobs:
      - name: checkout
        uses: actions/checkout@v2
      - name: lint
-        uses: golangci/golangci-lint-action@v2
+        uses: golangci/golangci-lint-action@v1
        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.
--- a/192
+++ b/192
@@ -1,192 +0,0 @@
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-      outstanding shares, or (iii) beneficial ownership of such entity.
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-      reproduction, and distribution of the Work otherwise complies with
-      the conditions stated in this License.
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-   5. Submission of Contributions. Unless You explicitly state otherwise,
-      any Contribution intentionally submitted for inclusion in the Work
-      by You to the Licensor shall be under the terms and conditions of
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-      Notwithstanding the above, nothing herein shall supersede or modify
-      the terms of any separate license agreement you may have executed
-      with Licensor regarding such Contributions.
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-   6. Trademarks. This License does not grant permission to use the trade
-      names, trademarks, service marks, or product names of the Licensor,
-      except as required for reasonable and customary use in describing the
-      origin of the Work and reproducing the content of the NOTICE file.
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-      agreed to in writing, Licensor provides the Work (and each
-      Contributor provides its Contributions) on an "AS IS" BASIS,
-      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
-      implied, including, without limitation, any warranties or conditions
-      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
-      PARTICULAR PURPOSE. You are solely responsible for determining the
-      appropriateness of using or redistributing the Work and assume any
-      risks associated with Your exercise of permissions under this License.
-
-   8. Limitation of Liability. In no event and under no legal theory,
-      whether in tort (including negligence), contract, or otherwise,
-      unless required by applicable law (such as deliberate and grossly
-      negligent acts) or agreed to in writing, shall any Contributor be
-      liable to You for damages, including any direct, indirect, special,
-      incidental, or consequential damages of any character arising as a
-      result of this License or out of the use or inability to use the
-      Work (including but not limited to damages for loss of goodwill,
-      work stoppage, computer failure or malfunction, or any and all
-      other commercial damages or losses), even if such Contributor
-      has been advised of the possibility of such damages.
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-   9. Accepting Warranty or Additional Liability. While redistributing
-      the Work or Derivative Works thereof, You may choose to offer,
-      and charge a fee for, acceptance of support, warranty, indemnity,
-      or other liability obligations and/or rights consistent with this
-      License. However, in accepting such obligations, You may act only
-      on Your own behalf and on Your sole responsibility, not on behalf
-      of any other Contributor, and only if You agree to indemnify,
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-
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-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
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-
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-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
-   limitations under the License.
--- a/README.md
+++ b/README.md
@@ -0,0 +1,25 @@
+# GRPC Client
+
+The grpc client is a [micro.Client](https://godoc.org/github.com/micro/go-micro/client#Client) compatible client.
+
+## Overview
+
+The client makes use of the [google.golang.org/grpc](google.golang.org/grpc) framework for the underlying communication mechanism.
+
+## Usage
+
+Specify the client to your micro service
+
+```go
+import (
+	"github.com/micro/go-micro"
+	"github.com/micro/go-plugins/client/grpc"
+)
+
+func main() {
+	service := micro.NewService(
+		micro.Name("greeter"),
+		micro.Client(grpc.NewClient()),
+	)
+}
+```
--- a/codec.go
+++ b/codec.go
@@ -1,117 +1,231 @@
 package grpc

 import (
-	"io"
+	b "bytes"
+	"encoding/json"
+	"fmt"
+	"strings"

+	oldjsonpb "github.com/golang/protobuf/jsonpb"
+	oldproto "github.com/golang/protobuf/proto"
+	bytes "github.com/unistack-org/micro-codec-bytes"
 	"github.com/unistack-org/micro/v3/codec"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/encoding"
+	jsonpb "google.golang.org/protobuf/encoding/protojson"
+	"google.golang.org/protobuf/proto"
 )

-type wrapStream struct{ grpc.ClientStream }
+type jsonCodec struct{}
+type protoCodec struct{}
+type bytesCodec struct{}
+type wrapCodec struct{ encoding.Codec }

-func (w *wrapStream) Write(d []byte) (int, error) {
-	n := len(d)
-	err := w.ClientStream.SendMsg(&codec.Frame{Data: d})
-	return n, err
+var jsonpbMarshaler = &jsonpb.MarshalOptions{}
+var oldjsonpbMarshaler = &oldjsonpb.Marshaler{}
+var useNumber bool
+
+var (
+	defaultGRPCCodecs = map[string]encoding.Codec{
+		"application/json":         jsonCodec{},
+		"application/proto":        protoCodec{},
+		"application/protobuf":     protoCodec{},
+		"application/octet-stream": protoCodec{},
+		"application/grpc":         protoCodec{},
+		"application/grpc+json":    jsonCodec{},
+		"application/grpc+proto":   protoCodec{},
+		"application/grpc+bytes":   bytesCodec{},
+	}
+)
+
+// UseNumber fix unmarshal Number(8234567890123456789) to interface(8.234567890123457e+18)
+func UseNumber() {
+	useNumber = true
 }

-func (w *wrapStream) Read(d []byte) (int, error) {
-	m := &codec.Frame{}
-	err := w.ClientStream.RecvMsg(m)
-	d = m.Data
-	return len(d), err
-}
-
-type wrapMicroCodec struct{ codec.Codec }
-
-func (w *wrapMicroCodec) Name() string {
-	return w.Codec.String()
-}
-
-type wrapGrpcCodec struct{ encoding.Codec }
-
-func (w *wrapGrpcCodec) String() string {
+func (w wrapCodec) String() string {
 	return w.Codec.Name()
 }

-func (w *wrapGrpcCodec) Marshal(v interface{}) ([]byte, error) {
+func (w wrapCodec) Marshal(v interface{}) ([]byte, error) {
 	switch m := v.(type) {
-	case *codec.Frame:
+	case *bytes.Frame:
 		return m.Data, nil
 	}
 	return w.Codec.Marshal(v)
 }

-func (w wrapGrpcCodec) Unmarshal(d []byte, v interface{}) error {
-	if d == nil || v == nil {
+func (w wrapCodec) Unmarshal(data []byte, v interface{}) error {
+	if len(data) == 0 {
+		return nil
+	}
+	if v == nil {
 		return nil
 	}
 	switch m := v.(type) {
-	case *codec.Frame:
-		m.Data = d
+	case *bytes.Frame:
+		m.Data = data
 		return nil
 	}
-	return w.Codec.Unmarshal(d, v)
+	return w.Codec.Unmarshal(data, v)
+}
+
+func (protoCodec) Marshal(v interface{}) ([]byte, error) {
+	switch m := v.(type) {
+	case *bytes.Frame:
+		return m.Data, nil
+	case proto.Message:
+		return proto.Marshal(m)
+	case oldproto.Message:
+		return oldproto.Marshal(m)
+	}
+	return nil, fmt.Errorf("failed to marshal: %v is not type of *bytes.Frame or proto.Message", v)
+}
+
+func (protoCodec) Unmarshal(data []byte, v interface{}) error {
+	if len(data) == 0 {
+		return nil
+	}
+	if v == nil {
+		return nil
+	}
+	switch m := v.(type) {
+	case *bytes.Frame:
+		m.Data = data
+		return nil
+	case proto.Message:
+		return proto.Unmarshal(data, m)
+	case oldproto.Message:
+		return oldproto.Unmarshal(data, m)
+	}
+	return fmt.Errorf("failed to unmarshal: %v is not type of *bytes.Frame or proto.Message", v)
+}
+
+func (protoCodec) Name() string {
+	return "proto"
+}
+
+func (bytesCodec) Marshal(v interface{}) ([]byte, error) {
+	switch m := v.(type) {
+	case *[]byte:
+		return *m, nil
+	}
+	return nil, fmt.Errorf("failed to marshal: %v is not type of *[]byte", v)
+}
+
+func (bytesCodec) Unmarshal(data []byte, v interface{}) error {
+	if len(data) == 0 {
+		return nil
+	}
+	if v == nil {
+		return nil
+	}
+	switch m := v.(type) {
+	case *[]byte:
+		*m = data
+		return nil
+	}
+	return fmt.Errorf("failed to unmarshal: %v is not type of *[]byte", v)
+}
+
+func (bytesCodec) Name() string {
+	return "bytes"
+}
+
+func (jsonCodec) Marshal(v interface{}) ([]byte, error) {
+	switch m := v.(type) {
+	case *bytes.Frame:
+		return m.Data, nil
+	case proto.Message:
+		return jsonpbMarshaler.Marshal(m)
+	case oldproto.Message:
+		buf, err := oldjsonpbMarshaler.MarshalToString(m)
+		return []byte(buf), err
+	}
+
+	return json.Marshal(v)
+}
+
+func (jsonCodec) Unmarshal(data []byte, v interface{}) error {
+	if len(data) == 0 {
+		return nil
+	}
+	if v == nil {
+		return nil
+	}
+	switch m := v.(type) {
+	case *bytes.Frame:
+		m.Data = data
+		return nil
+	case proto.Message:
+		return jsonpb.Unmarshal(data, m)
+	case oldproto.Message:
+		return oldjsonpb.Unmarshal(b.NewReader(data), m)
+	}
+	dec := json.NewDecoder(b.NewReader(data))
+	if useNumber {
+		dec.UseNumber()
+	}
+	return dec.Decode(v)
+}
+
+func (jsonCodec) Name() string {
+	return "json"
 }

-/*
 type grpcCodec struct {
-	grpc.ServerStream
 	// headers
 	id       string
 	target   string
 	method   string
 	endpoint string

+	s grpc.ClientStream
 	c encoding.Codec
 }

-*/
-
-func (g *wrapGrpcCodec) ReadHeader(conn io.Reader, m *codec.Message, mt codec.MessageType) error {
-	/*
-		if m == nil {
-			m = codec.NewMessage(codec.Request)
+func (g *grpcCodec) ReadHeader(m *codec.Message, mt codec.MessageType) error {
+	md, err := g.s.Header()
+	if err != nil {
+		return err
+	}
+	if m == nil {
+		m = new(codec.Message)
 	}
-
-		if md, ok := metadata.FromIncomingContext(g.ServerStream.Context()); ok {
 	if m.Header == nil {
-				m.Header = meta.New(len(md))
+		m.Header = make(map[string]string, len(md))
 	}
 	for k, v := range md {
 		m.Header[k] = strings.Join(v, ",")
 	}
-		}
-
 	m.Id = g.id
 	m.Target = g.target
 	m.Method = g.method
 	m.Endpoint = g.endpoint
-	*/
 	return nil
 }

-func (g *wrapGrpcCodec) ReadBody(conn io.Reader, v interface{}) error {
-	// caller has requested a frame
+func (g *grpcCodec) ReadBody(v interface{}) error {
 	switch m := v.(type) {
-	case *codec.Frame:
-		_, err := conn.Read(m.Data)
-		return err
+	case *bytes.Frame:
+		return g.s.RecvMsg(m)
 	}
-	return codec.ErrInvalidMessage
+	return g.s.RecvMsg(v)
 }

-func (g *wrapGrpcCodec) Write(conn io.Writer, m *codec.Message, v interface{}) error {
+func (g *grpcCodec) Write(m *codec.Message, v interface{}) error {
 	// if we don't have a body
 	if v != nil {
-		b, err := g.Marshal(v)
-		if err != nil {
-			return err
-		}
-		m.Body = b
+		return g.s.SendMsg(v)
 	}
 	// write the body using the framing codec
-	_, err := conn.Write(m.Body)
-	return err
+	return g.s.SendMsg(&bytes.Frame{Data: m.Body})
+}
+
+func (g *grpcCodec) Close() error {
+	return g.s.CloseSend()
+}
+
+func (g *grpcCodec) String() string {
+	return g.c.Name()
 }
--- a/error.go
+++ b/error.go
@@ -1,6 +1,7 @@
 package grpc

 import (
+	pberr "github.com/unistack-org/micro-client-grpc/errors"
 	"github.com/unistack-org/micro/v3/errors"
 	"google.golang.org/grpc/status"
 )
@@ -16,6 +17,10 @@ func microError(err error) error {
 		return verr
 	}

+	if verr, ok := err.(*pberr.Error); ok {
+		return &errors.Error{Id: verr.Id, Code: verr.Code, Detail: verr.Detail, Status: verr.Status}
+	}
+
 	// grpc error
 	s, ok := status.FromError(err)
 	if !ok {
--- a/errors/errors.go
+++ b/errors/errors.go
@@ -0,0 +1,159 @@
+package errors
+
+import (
+	"fmt"
+)
+
+func (e *Error) Error() string {
+	return fmt.Sprintf(`{"id":"%s","code":%d,"detail":"%s","status":"%s"}`, e.Id, e.Code, e.Detail, e.Status)
+}
+
+// New generates a custom error.
+func New(id, detail string, code int32) error {
+	return &Error{
+		Id:     id,
+		Code:   code,
+		Detail: detail,
+		//	Status: http.StatusText(int(code)),
+	}
+}
+
+// BadRequest generates a 400 error.
+func BadRequest(id, format string, a ...interface{}) error {
+	return &Error{
+		Id:     id,
+		Code:   400,
+		Detail: fmt.Sprintf(format, a...),
+		//		Status: http.StatusText(400),
+	}
+}
+
+// Unauthorized generates a 401 error.
+func Unauthorized(id, format string, a ...interface{}) error {
+	return &Error{
+		Id:     id,
+		Code:   401,
+		Detail: fmt.Sprintf(format, a...),
+		//		Status: http.StatusText(401),
+	}
+}
+
+// Forbidden generates a 403 error.
+func Forbidden(id, format string, a ...interface{}) error {
+	return &Error{
+		Id:     id,
+		Code:   403,
+		Detail: fmt.Sprintf(format, a...),
+		//		Status: http.StatusText(403),
+	}
+}
+
+// NotFound generates a 404 error.
+func NotFound(id, format string, a ...interface{}) error {
+	return &Error{
+		Id:     id,
+		Code:   404,
+		Detail: fmt.Sprintf(format, a...),
+		//	Status: http.StatusText(404),
+	}
+}
+
+// MethodNotAllowed generates a 405 error.
+func MethodNotAllowed(id, format string, a ...interface{}) error {
+	return &Error{
+		Id:     id,
+		Code:   405,
+		Detail: fmt.Sprintf(format, a...),
+		//Status: http.StatusText(405),
+	}
+}
+
+// Timeout generates a 408 error.
+func Timeout(id, format string, a ...interface{}) error {
+	return &Error{
+		Id:     id,
+		Code:   408,
+		Detail: fmt.Sprintf(format, a...),
+		//Status: http.StatusText(408),
+	}
+}
+
+// Conflict generates a 409 error.
+func Conflict(id, format string, a ...interface{}) error {
+	return &Error{
+		Id:     id,
+		Code:   409,
+		Detail: fmt.Sprintf(format, a...),
+		//Status: http.StatusText(409),
+	}
+}
+
+// InternalServerError generates a 500 error.
+func InternalServerError(id, format string, a ...interface{}) error {
+	return &Error{
+		Id:     id,
+		Code:   500,
+		Detail: fmt.Sprintf(format, a...),
+		//Status: http.StatusText(500),
+	}
+}
+
+// NotImplemented generates a 501 error
+func NotImplemented(id, format string, a ...interface{}) error {
+	return &Error{
+		Id:     id,
+		Code:   501,
+		Detail: fmt.Sprintf(format, a...),
+		//Status: http.StatusText(501),
+	}
+}
+
+// BadGateway generates a 502 error
+func BadGateway(id, format string, a ...interface{}) error {
+	return &Error{
+		Id:     id,
+		Code:   502,
+		Detail: fmt.Sprintf(format, a...),
+		//	Status: http.StatusText(502),
+	}
+}
+
+// ServiceUnavailable generates a 503 error
+func ServiceUnavailable(id, format string, a ...interface{}) error {
+	return &Error{
+		Id:     id,
+		Code:   503,
+		Detail: fmt.Sprintf(format, a...),
+		//Status: http.StatusText(503),
+	}
+}
+
+// GatewayTimeout generates a 504 error
+func GatewayTimeout(id, format string, a ...interface{}) error {
+	return &Error{
+		Id:     id,
+		Code:   504,
+		Detail: fmt.Sprintf(format, a...),
+		//Status: http.StatusText(504),
+	}
+}
+
+// Equal tries to compare errors
+func Equal(err1 error, err2 error) bool {
+	verr1, ok1 := err1.(*Error)
+	verr2, ok2 := err2.(*Error)
+
+	if ok1 != ok2 {
+		return false
+	}
+
+	if !ok1 {
+		return err1 == err2
+	}
+
+	if verr1.Code != verr2.Code {
+		return false
+	}
+
+	return true
+}
--- a/errors/errors.pb.go
+++ b/errors/errors.pb.go
@@ -0,0 +1,173 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.25.0-devel
+// 	protoc        v3.6.1
+// source: errors.proto
+
+package errors
+
+import (
+	proto "github.com/golang/protobuf/proto"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// This is a compile-time assertion that a sufficiently up-to-date version
+// of the legacy proto package is being used.
+const _ = proto.ProtoPackageIsVersion4
+
+type Error struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Id     string `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	Code   int32  `protobuf:"varint,2,opt,name=code,proto3" json:"code,omitempty"`
+	Detail string `protobuf:"bytes,3,opt,name=detail,proto3" json:"detail,omitempty"`
+	Status string `protobuf:"bytes,4,opt,name=status,proto3" json:"status,omitempty"`
+}
+
+func (x *Error) Reset() {
+	*x = Error{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_errors_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Error) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Error) ProtoMessage() {}
+
+func (x *Error) ProtoReflect() protoreflect.Message {
+	mi := &file_errors_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Error.ProtoReflect.Descriptor instead.
+func (*Error) Descriptor() ([]byte, []int) {
+	return file_errors_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Error) GetId() string {
+	if x != nil {
+		return x.Id
+	}
+	return ""
+}
+
+func (x *Error) GetCode() int32 {
+	if x != nil {
+		return x.Code
+	}
+	return 0
+}
+
+func (x *Error) GetDetail() string {
+	if x != nil {
+		return x.Detail
+	}
+	return ""
+}
+
+func (x *Error) GetStatus() string {
+	if x != nil {
+		return x.Status
+	}
+	return ""
+}
+
+var File_errors_proto protoreflect.FileDescriptor
+
+var file_errors_proto_rawDesc = []byte{
+	0x0a, 0x0c, 0x65, 0x72, 0x72, 0x6f, 0x72, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x06,
+	0x65, 0x72, 0x72, 0x6f, 0x72, 0x73, 0x22, 0x5b, 0x0a, 0x05, 0x45, 0x72, 0x72, 0x6f, 0x72, 0x12,
+	0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x02, 0x69, 0x64, 0x12,
+	0x12, 0x0a, 0x04, 0x63, 0x6f, 0x64, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x05, 0x52, 0x04, 0x63,
+	0x6f, 0x64, 0x65, 0x12, 0x16, 0x0a, 0x06, 0x64, 0x65, 0x74, 0x61, 0x69, 0x6c, 0x18, 0x03, 0x20,
+	0x01, 0x28, 0x09, 0x52, 0x06, 0x64, 0x65, 0x74, 0x61, 0x69, 0x6c, 0x12, 0x16, 0x0a, 0x06, 0x73,
+	0x74, 0x61, 0x74, 0x75, 0x73, 0x18, 0x04, 0x20, 0x01, 0x28, 0x09, 0x52, 0x06, 0x73, 0x74, 0x61,
+	0x74, 0x75, 0x73, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_errors_proto_rawDescOnce sync.Once
+	file_errors_proto_rawDescData = file_errors_proto_rawDesc
+)
+
+func file_errors_proto_rawDescGZIP() []byte {
+	file_errors_proto_rawDescOnce.Do(func() {
+		file_errors_proto_rawDescData = protoimpl.X.CompressGZIP(file_errors_proto_rawDescData)
+	})
+	return file_errors_proto_rawDescData
+}
+
+var file_errors_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_errors_proto_goTypes = []interface{}{
+	(*Error)(nil), // 0: errors.Error
+}
+var file_errors_proto_depIdxs = []int32{
+	0, // [0:0] is the sub-list for method output_type
+	0, // [0:0] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_errors_proto_init() }
+func file_errors_proto_init() {
+	if File_errors_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_errors_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Error); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_errors_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_errors_proto_goTypes,
+		DependencyIndexes: file_errors_proto_depIdxs,
+		MessageInfos:      file_errors_proto_msgTypes,
+	}.Build()
+	File_errors_proto = out.File
+	file_errors_proto_rawDesc = nil
+	file_errors_proto_goTypes = nil
+	file_errors_proto_depIdxs = nil
+}
--- a/errors/errors.pb.micro.go
+++ b/errors/errors.pb.micro.go
@@ -0,0 +1,21 @@
+// Code generated by protoc-gen-micro. DO NOT EDIT.
+// source: errors.proto
+
+package errors
+
+import (
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	math "math"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
--- a/errors/errors.proto
+++ b/errors/errors.proto
@@ -0,0 +1,10 @@
+syntax = "proto3";
+
+package errors;
+
+message Error {
+  string id = 1;
+  int32 code = 2;
+  string detail = 3;
+  string status = 4;
+};
--- a/generate.go
+++ b/generate.go
@@ -0,0 +1,3 @@
+package grpc
+
+//go:generate protoc -I./errors -I. --go-grpc_out=paths=source_relative:./errors --go_out=paths=source_relative:./errors --micro_out=paths=source_relative:./errors errors/errors.proto
--- a/go.mod
+++ b/go.mod
@@ -1,13 +1,15 @@
-module github.com/unistack-org/micro-client-grpc/v3
+module github.com/unistack-org/micro-client-grpc

-go 1.16
+go 1.15

 require (
+	github.com/golang/protobuf v1.4.2
 	github.com/google/go-cmp v0.5.1 // indirect
-	github.com/unistack-org/micro/v3 v3.3.11
+	github.com/unistack-org/micro-codec-bytes v0.0.0-20200828083432-4e49e953d844
+	github.com/unistack-org/micro/v3 v3.0.0-gamma.0.20200920124807-9b11ea527aeb
+	golang.org/x/sys v0.0.0-20200803210538-64077c9b5642 // indirect
+	golang.org/x/text v0.3.3 // indirect
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
-	google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d // indirect
-	google.golang.org/grpc v1.37.0
+	google.golang.org/grpc v1.31.1
+	google.golang.org/protobuf v1.25.0
 )
-
-//replace github.com/unistack-org/micro/v3 => ../../micro
--- a/go.sum
+++ b/go.sum
@@ -1,20 +1,106 @@
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@@ -23,6 +109,9 @@ github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvq
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 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/api v0.3.1/go.mod h1:6wY9I6uQWHQ8EM57III9mq/AjF+i8G65rmVagqKMtkk=
+google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE=
+google.golang.org/api v0.7.0/go.mod h1:WtwebWUNSVBH/HAw79HIFXZNqEvBhG+Ra+ax0hx3E3M=
+google.golang.org/api v0.8.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
+google.golang.org/api v0.9.0/go.mod h1:o4eAsZoiT+ibD93RtjEohWalFOjRDx6CVaqeizhEnKg=
+google.golang.org/api v0.14.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsbkAI=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
+google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
+google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
+google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
+google.golang.org/genproto v0.0.0-20190418145605-e7d98fc518a7/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
+google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
+google.golang.org/genproto v0.0.0-20190502173448-54afdca5d873/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
+google.golang.org/genproto v0.0.0-20190801165951-fa694d86fc64/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
+google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51/go.mod h1:IbNlFCBrqXvoKpeg0TB2l7cyZUmoaFKYIwrEpbDKLA8=
+google.golang.org/genproto v0.0.0-20191216164720-4f79533eabd1/go.mod h1:n3cpQtvxv34hfy77yVDNjmbRyujviMdxYliBSkLhpCc=
+google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013 h1:+kGHl1aib/qcwaRi1CbqBZ1rk19r85MNUf8HaBghugY=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
 google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d h1:92D1fum1bJLKSdr11OJ+54YeCMCGYIygTA7R/YZxH5M=
 google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
+google.golang.org/grpc v1.19.1/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
+google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
+google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
 google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
 google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
-google.golang.org/grpc v1.36.0 h1:o1bcQ6imQMIOpdrO3SWf2z5RV72WbDwdXuK0MDlc8As=
-google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
-google.golang.org/grpc v1.36.1 h1:cmUfbeGKnz9+2DD/UYsMQXeqbHZqZDs4eQwW0sFOpBY=
-google.golang.org/grpc v1.36.1/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
-google.golang.org/grpc v1.37.0 h1:uSZWeQJX5j11bIQ4AJoj+McDBo29cY1MCoC1wO3ts+c=
-google.golang.org/grpc v1.37.0/go.mod h1:NREThFqKR1f3iQ6oBuvc5LadQuXVGo9rkm5ZGrQdJfM=
+google.golang.org/grpc v1.31.1 h1:SfXqXS5hkufcdZ/mHtYCh53P2b+92WQq/DZcKLgsFRs=
+google.golang.org/grpc v1.31.1/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
@@ -124,8 +439,33 @@ google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpAD
 google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
 google.golang.org/protobuf v1.25.0 h1:Ejskq+SyPohKW+1uil0JJMtmHCgJPJ/qWTxr8qp+R4c=
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
+gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/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/check.v1 v1.0.0-20200227125254-8fa46927fb4f h1:BLraFXnmrev5lT+xlilqcH8XK9/i0At2xKjWk4p6zsU=
+gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
+gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/h2non/gock.v1 v1.0.15/go.mod h1:sX4zAkdYX1TRGJ2JY156cFspQn4yRWn6p9EMdODlynE=
+gopkg.in/ini.v1 v1.42.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
+gopkg.in/ini.v1 v1.44.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
+gopkg.in/ns1/ns1-go.v2 v2.0.0-20190730140822-b51389932cbc/go.mod h1:VV+3haRsgDiVLxyifmMBrBIuCWFBPYKbRssXB9z67Hw=
+gopkg.in/resty.v1 v1.9.1/go.mod h1:vo52Hzryw9PnPHcJfPsBiFW62XhNx5OczbV9y+IMpgc=
+gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
+gopkg.in/square/go-jose.v2 v2.3.1/go.mod h1:M9dMgbHiYLoDGQrXy7OpJDJWiKiU//h+vD76mk0e1AI=
+gopkg.in/square/go-jose.v2 v2.4.1/go.mod h1:M9dMgbHiYLoDGQrXy7OpJDJWiKiU//h+vD76mk0e1AI=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
+gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
--- a/grpc.go
+++ b/grpc.go
@@ -12,11 +12,12 @@ import (
 	"sync/atomic"
 	"time"

+	raw "github.com/unistack-org/micro-codec-bytes"
 	"github.com/unistack-org/micro/v3/broker"
 	"github.com/unistack-org/micro/v3/client"
-	"github.com/unistack-org/micro/v3/codec"
 	"github.com/unistack-org/micro/v3/errors"
 	"github.com/unistack-org/micro/v3/metadata"
+
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/encoding"
@@ -28,10 +29,15 @@ type grpcClient struct {
 	codecs map[string]encoding.Codec
 	pool   *pool
 	once   atomic.Value
-	init   bool
 	sync.RWMutex
 }

+func init() {
+	encoding.RegisterCodec(wrapCodec{jsonCodec{}})
+	encoding.RegisterCodec(wrapCodec{protoCodec{}})
+	encoding.RegisterCodec(wrapCodec{bytesCodec{}})
+}
+
 // secure returns the dial option for whether its a secure or insecure connection
 func (g *grpcClient) secure(addr string) grpc.DialOption {
 	// first we check if theres'a  tls config
@@ -69,13 +75,14 @@ func (g *grpcClient) secure(addr string) grpc.DialOption {
 func (g *grpcClient) call(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
 	var header map[string]string

-	if md, ok := metadata.FromOutgoingContext(ctx); ok {
+	header = make(map[string]string)
+	if md, ok := metadata.FromContext(ctx); ok {
 		header = make(map[string]string, len(md))
 		for k, v := range md {
 			header[strings.ToLower(k)] = v
 		}
 	} else {
-		header = make(map[string]string, 2)
+		header = make(map[string]string)
 	}

 	// set timeout in nanoseconds
@@ -130,8 +137,8 @@ func (g *grpcClient) call(ctx context.Context, addr string, req client.Request,

 	go func() {
 		grpcCallOptions := []grpc.CallOption{
-			grpc.ForceCodec(&wrapMicroCodec{cf}),
-			grpc.CallContentSubtype((&wrapMicroCodec{cf}).Name())}
+			grpc.ForceCodec(cf),
+			grpc.CallContentSubtype(cf.Name())}
 		if opts := g.getGrpcCallOptions(); opts != nil {
 			grpcCallOptions = append(grpcCallOptions, opts...)
 		}
@@ -152,7 +159,7 @@ func (g *grpcClient) call(ctx context.Context, addr string, req client.Request,
 func (g *grpcClient) stream(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
 	var header map[string]string

-	if md, ok := metadata.FromOutgoingContext(ctx); ok {
+	if md, ok := metadata.FromContext(ctx); ok {
 		header = make(map[string]string, len(md))
 		for k, v := range md {
 			header[k] = v
@@ -185,7 +192,7 @@ func (g *grpcClient) stream(ctx context.Context, addr string, req client.Request
 	}
 	defer cancel()

-	wc := &wrapMicroCodec{cf}
+	wc := wrapCodec{cf}

 	grpcDialOptions := []grpc.DialOption{
 		g.secure(addr),
@@ -208,7 +215,7 @@ func (g *grpcClient) stream(ctx context.Context, addr string, req client.Request

 	grpcCallOptions := []grpc.CallOption{
 		grpc.ForceCodec(wc),
-		grpc.CallContentSubtype(wc.Name()),
+		grpc.CallContentSubtype(cf.Name()),
 	}
 	if opts := g.getGrpcCallOptions(); opts != nil {
 		grpcCallOptions = append(grpcCallOptions, opts...)
@@ -228,9 +235,14 @@ func (g *grpcClient) stream(ctx context.Context, addr string, req client.Request
 		return errors.InternalServerError("go.micro.client", fmt.Sprintf("Error creating stream: %v", err))
 	}

+	codec := &grpcCodec{
+		s: st,
+		c: wc,
+	}
+
 	// set request codec
 	if r, ok := req.(*grpcRequest); ok {
-		r.codec = cf
+		r.codec = codec
 	}

 	// setup the stream response
@@ -242,6 +254,7 @@ func (g *grpcClient) stream(ctx context.Context, addr string, req client.Request
 			conn:   cc,
 			stream: st,
 			codec:  cf,
+			gcodec: codec,
 		},
 		conn: cc,
 		close: func(err error) {
@@ -305,20 +318,17 @@ func (g *grpcClient) maxSendMsgSizeValue() int {
 	return v.(int)
 }

-func (g *grpcClient) newGRPCCodec(ct string) (codec.Codec, error) {
+func (g *grpcClient) newGRPCCodec(contentType string) (encoding.Codec, error) {
 	g.RLock()
 	defer g.RUnlock()

-	if c, ok := g.opts.Codecs[ct]; ok {
-		return c, nil
+	if c, ok := g.codecs[contentType]; ok {
+		return wrapCodec{c}, nil
 	}
-	return nil, codec.ErrUnknownContentType
+	return nil, fmt.Errorf("Unsupported Content-Type: %s", contentType)
 }

 func (g *grpcClient) Init(opts ...client.Option) error {
-	if len(opts) == 0 && g.init {
-		return nil
-	}
 	size := g.opts.PoolSize
 	ttl := g.opts.PoolTTL

@@ -334,27 +344,6 @@ func (g *grpcClient) Init(opts ...client.Option) error {
 		g.pool.Unlock()
 	}

-	if err := g.opts.Broker.Init(); err != nil {
-		return err
-	}
-	if err := g.opts.Tracer.Init(); err != nil {
-		return err
-	}
-	if err := g.opts.Router.Init(); err != nil {
-		return err
-	}
-	if err := g.opts.Logger.Init(); err != nil {
-		return err
-	}
-	if err := g.opts.Meter.Init(); err != nil {
-		return err
-	}
-	if err := g.opts.Transport.Init(); err != nil {
-		return err
-	}
-
-	g.init = true
-
 	return nil
 }

@@ -573,7 +562,7 @@ func (g *grpcClient) Stream(ctx context.Context, req client.Request, opts ...cli

 		// make the call
 		stream := &grpcStream{}
-		err = gstream(ctx, node, req, stream, callOpts)
+		err = g.stream(ctx, node, req, stream, callOpts)

 		// record the result of the call to inform future routing decisions
 		if verr := g.opts.Selector.Record(node, err); verr != nil {
@@ -585,10 +574,7 @@ func (g *grpcClient) Stream(ctx context.Context, req client.Request, opts ...cli
 			return nil, verr
 		}

-		if rerr := g.opts.Selector.Record(node, err); rerr != nil {
-			return nil, rerr
-		}
-
+		g.opts.Selector.Record(node, err)
 		return stream, err
 	}

@@ -632,19 +618,30 @@ func (g *grpcClient) Stream(ctx context.Context, req client.Request, opts ...cli
 }

 func (g *grpcClient) Publish(ctx context.Context, p client.Message, opts ...client.PublishOption) error {
+	var options client.PublishOptions
 	var body []byte

-	options := client.NewPublishOptions(opts...)
+	// fail early on connect error
+	if !g.once.Load().(bool) {
+		if err := g.opts.Broker.Connect(); err != nil {
+			return errors.InternalServerError("go.micro.client", err.Error())
+		}
+		g.once.Store(true)
+	}

-	md, ok := metadata.FromOutgoingContext(ctx)
+	for _, o := range opts {
+		o(&options)
+	}
+
+	md, ok := metadata.FromContext(ctx)
 	if !ok {
-		md = metadata.New(2)
+		md = make(map[string]string)
 	}
 	md["Content-Type"] = p.ContentType()
 	md["Micro-Topic"] = p.Topic()

 	// passed in raw data
-	if d, ok := p.Payload().(*codec.Frame); ok {
+	if d, ok := p.Payload().(*raw.Frame); ok {
 		body = d.Data
 	} else {
 		// use codec for payload
@@ -667,7 +664,7 @@ func (g *grpcClient) Publish(ctx context.Context, p client.Message, opts ...clie
 		topic = options.Exchange
 	}

-	return g.opts.Broker.Publish(metadata.NewOutgoingContext(ctx, md), topic, &broker.Message{
+	return g.opts.Broker.Publish(topic, &broker.Message{
 		Header: md,
 		Body:   body,
 	}, broker.PublishContext(options.Context))
@@ -677,10 +674,6 @@ func (g *grpcClient) String() string {
 	return "grpc"
 }

-func (g *grpcClient) Name() string {
-	return g.opts.Name
-}
-
 func (g *grpcClient) getGrpcDialOptions() []grpc.DialOption {
 	if g.opts.CallOptions.Context == nil {
 		return nil
@@ -721,14 +714,19 @@ func (g *grpcClient) getGrpcCallOptions() []grpc.CallOption {
 	return opts
 }

-func NewClient(opts ...client.Option) client.Client {
-	options := client.NewOptions(opts...)
+func newClient(opts ...client.Option) client.Client {
+	options := client.NewOptions()
 	// default content type for grpc
 	options.ContentType = "application/grpc+proto"

+	for _, o := range opts {
+		o(&options)
+	}
+
 	rc := &grpcClient{
 		opts: options,
 	}
+	rc.once.Store(false)

 	rc.pool = newPool(options.PoolSize, options.PoolTTL, rc.poolMaxIdle(), rc.poolMaxStreams())

@@ -739,17 +737,25 @@ func NewClient(opts ...client.Option) client.Client {
 		c = options.Wrappers[i-1](c)
 	}

-	if rc.opts.Context != nil {
-		if codecs, ok := rc.opts.Context.Value(codecsKey{}).(map[string]encoding.Codec); ok && codecs != nil {
-			for k, v := range codecs {
-				rc.opts.Codecs[k] = &wrapGrpcCodec{v}
+	rc.codecs = make(map[string]encoding.Codec, len(defaultGRPCCodecs))
+	for k, v := range defaultGRPCCodecs {
+		rc.codecs[k] = v
 	}
+
+	var codecs map[string]encoding.Codec
+	if rc.opts.Context != nil {
+		if v := rc.opts.Context.Value(codecsKey{}); v != nil {
+			codecs = v.(map[string]encoding.Codec)
 		}
 	}

-	for _, k := range options.Codecs {
-		encoding.RegisterCodec(&wrapMicroCodec{k})
+	for k, v := range codecs {
+		rc.codecs[k] = v
 	}

 	return c
 }
+
+func NewClient(opts ...client.Option) client.Client {
+	return newClient(opts...)
+}
--- a/grpc_pool.go
+++ b/grpc_pool.go
@@ -185,6 +185,7 @@ func (p *pool) release(addr string, conn *poolConn, err error) {
 		sp.idle++
 	}
 	p.Unlock()
+	return
 }

 func (conn *poolConn) Close() {
@@ -202,6 +203,7 @@ func removeConn(conn *poolConn) {
 	conn.next = nil
 	conn.in = false
 	conn.sp.count--
+	return
 }

 func addConnAfter(conn *poolConn, after *poolConn) {
@@ -213,4 +215,5 @@ func addConnAfter(conn *poolConn, after *poolConn) {
 	after.next = conn
 	conn.in = true
 	conn.sp.count++
+	return
 }
--- a/request.go
+++ b/request.go
@@ -74,7 +74,7 @@ func (g *grpcRequest) Endpoint() string {
 	return g.method
 }

-func (g *grpcRequest) Codec() codec.Codec {
+func (g *grpcRequest) Codec() codec.Writer {
 	return g.codec
 }

--- a/response.go
+++ b/response.go
@@ -4,38 +4,40 @@ import (
 	"strings"

 	"github.com/unistack-org/micro/v3/codec"
-	"github.com/unistack-org/micro/v3/metadata"
+	"github.com/unistack-org/micro-codec-bytes"
 	"google.golang.org/grpc"
+	"google.golang.org/grpc/encoding"
 )

 type response struct {
 	conn   *poolConn
 	stream grpc.ClientStream
-	codec  codec.Codec
+	codec  encoding.Codec
+	gcodec codec.Codec
 }

 // Read the response
-func (r *response) Codec() codec.Codec {
-	return r.codec
+func (r *response) Codec() codec.Reader {
+	return r.gcodec
 }

 // read the header
-func (r *response) Header() metadata.Metadata {
-	meta, err := r.stream.Header()
+func (r *response) Header() map[string]string {
+	md, err := r.stream.Header()
 	if err != nil {
-		return metadata.New(0)
+		return map[string]string{}
 	}
-	md := metadata.New(len(meta))
-	for k, v := range meta {
-		md.Set(k, strings.Join(v, ","))
+	hdr := make(map[string]string, len(md))
+	for k, v := range md {
+		hdr[k] = strings.Join(v, ",")
 	}
-	return md
+	return hdr
 }

 // Read the undecoded response
 func (r *response) Read() ([]byte, error) {
-	f := &codec.Frame{}
-	if err := r.codec.ReadBody(&wrapStream{r.stream}, f); err != nil {
+	f := &bytes.Frame{}
+	if err := r.gcodec.ReadBody(f); err != nil {
 		return nil, err
 	}
 	return f.Data, nil