Merge pull request 'move to micro v4' (#123) from v4 into master

Reviewed-on: #123

.gitea/workflows/job_lint.yml

@@ -1,29 +0,0 @@
-name: lint
-
-on:
-  pull_request:
-    types: [opened, reopened, synchronize]
-    branches:
-    - master
-    - v3
-    - v4
-
-jobs:
-  lint:
-    runs-on: ubuntu-latest
-    steps:
-    - name: checkout code
-      uses: actions/checkout@v4
-      with:
-        filter: 'blob:none'
-    - name: setup go
-      uses: actions/setup-go@v5
-      with:
-        cache-dependency-path: "**/*.sum"
-        go-version: 'stable' 
-    - name: setup deps
-      run: go get -v ./...
-    - name: run lint
-      uses: https://github.com/golangci/golangci-lint-action@v6
-      with:
-        version: 'latest'

.gitea/workflows/job_test.yml

@@ -1,34 +0,0 @@
-name: test
-
-on:
-  pull_request:
-    types: [opened, reopened, synchronize]
-    branches:
-    - master
-    - v3
-    - v4
-  push:
-    branches:
-    - master
-    - v3
-    - v4
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    steps:
-    - name: checkout code
-      uses: actions/checkout@v4
-      with:
-        filter: 'blob:none'
-    - name: setup go
-      uses: actions/setup-go@v5
-      with:
-        cache-dependency-path: "**/*.sum"
-        go-version: 'stable'
-    - name: setup deps
-      run: go get -v ./...
-    - name: run test
-      env:
-        INTEGRATION_TESTS: yes
-      run: go test -mod readonly -v ./...

.gitea/workflows/job_tests.yml

@@ -1,53 +0,0 @@
-name: test
-
-on:
-  pull_request:
-    types: [opened, reopened, synchronize]
-    branches:
-    - master
-    - v3
-    - v4
-  push:
-    branches:
-    - master
-    - v3
-    - v4
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    steps:
-    - name: checkout code
-      uses: actions/checkout@v4
-      with:
-        filter: 'blob:none'
-    - name: checkout tests
-      uses: actions/checkout@v4
-      with:
-        ref: master
-        filter: 'blob:none'
-        repository: unistack-org/micro-tests
-        path: micro-tests
-    - name: setup go
-      uses: actions/setup-go@v5
-      with:
-        cache-dependency-path: "**/*.sum"
-        go-version: 'stable'
-    - name: setup go work
-      env:
-        GOWORK: /workspace/${{ github.repository_owner }}/go.work
-      run: |
-        go work init
-        go work use .
-        go work use micro-tests        
-    - name: setup deps
-      env:
-        GOWORK: /workspace/${{ github.repository_owner }}/go.work
-      run: go get -v ./...
-    - name: run tests
-      env:
-        INTEGRATION_TESTS: yes
-        GOWORK: /workspace/${{ github.repository_owner }}/go.work
-      run: |
-        cd micro-tests
-        go test -mod readonly -v ./... || true        

.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/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

@@ -0,0 +1,47 @@
+name: build
+on:
+ push:
+    branches:
+    - master
+    - v3
+jobs:
+  test:
+    name: test
+    runs-on: ubuntu-latest
+    steps:
+    - name: setup
+      uses: actions/setup-go@v3
+      with:
+        go-version: 1.17
+    - name: checkout
+      uses: actions/checkout@v3
+    - name: cache
+      uses: actions/cache@v3
+      with:
+        path: ~/go/pkg/mod
+        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        restore-keys: ${{ runner.os }}-go-
+    - name: deps
+      run: go get -v -t -d ./...
+    - name: test
+      env:
+        INTEGRATION_TESTS: yes
+      run: go test -mod readonly -v ./...
+  lint:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v3
+      - name: lint
+        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.
+          version: v1.30
+          # Optional: working directory, useful for monorepos
+          # working-directory: somedir
+          # Optional: golangci-lint command line arguments.
+          # args: --issues-exit-code=0
+          # Optional: show only new issues if it's a pull request. The default value is `false`.
+          # only-new-issues: true

.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

@@ -0,0 +1,47 @@
+name: prbuild
+on:
+  pull_request:
+    branches:
+    - master
+    - v3
+jobs:
+  test:
+    name: test
+    runs-on: ubuntu-latest
+    steps:
+    - name: setup
+      uses: actions/setup-go@v3
+      with:
+        go-version: 1.17
+    - name: checkout
+      uses: actions/checkout@v3
+    - name: cache
+      uses: actions/cache@v3
+      with:
+        path: ~/go/pkg/mod
+        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        restore-keys: ${{ runner.os }}-go-
+    - name: deps
+      run: go get -v -t -d ./...
+    - name: test
+      env:
+        INTEGRATION_TESTS: yes
+      run: go test -mod readonly -v ./...
+  lint:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v3
+      - name: lint
+        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.
+          version: v1.30
+          # Optional: working directory, useful for monorepos
+          # working-directory: somedir
+          # Optional: golangci-lint command line arguments.
+          # args: --issues-exit-code=0
+          # Optional: show only new issues if it's a pull request. The default value is `false`.
+          # only-new-issues: true

.golangci.yml

@@ -1,9 +1,38 @@
 run:
-  concurrency: 8
   deadline: 5m
-  issues-exit-code: 1
-  tests: true
   modules-download-mode: readonly
   skip-files:
     - ".*\\.pb\\.go$"
     - ".*\\.pb\\.micro\\.go$"
+linters:
+  disable-all: false
+  enable-all: false
+  enable:
+    - megacheck
+    - staticcheck
+    - deadcode
+    - varcheck
+    - gosimple
+    - unused
+    - prealloc
+    - scopelint
+    - gocritic
+    - goimports
+    - unconvert
+    - govet
+    - nakedret
+    - structcheck
+    - gosec
+  disable:
+    - maligned
+    - interfacer
+    - typecheck
+    - dupl
+output:
+  format: colored-line-number
+  # print lines of code with issue, default is true
+  print-issued-lines: true
+  # print linter name in the end of issue text, default is true
+  print-linter-name: true
+  # make issues output unique by line, default is true
+  uniq-by-line: true

go.mod

@@ -1,18 +1,16 @@
-module go.unistack.org/micro-codec-segmentio/v3
+module go.unistack.org/micro-codec-segmentio/v4
 
-go 1.21
+go 1.19
-
-toolchain go1.23.4
 
 require (
-	github.com/segmentio/encoding v0.4.1
+	github.com/segmentio/encoding v0.3.6
-	go.unistack.org/micro-proto/v3 v3.4.1
+	go.unistack.org/micro-proto/v4 v4.0.0
-	go.unistack.org/micro/v3 v3.10.88
+	go.unistack.org/micro/v4 v4.0.1
-	google.golang.org/protobuf v1.35.2
+	google.golang.org/protobuf v1.28.1
 )
 
 require (
-	github.com/google/go-cmp v0.6.0 // indirect
+	github.com/google/go-cmp v0.5.7 // indirect
 	github.com/segmentio/asm v1.2.0 // indirect
-	golang.org/x/sys v0.28.0 // indirect
+	golang.org/x/sys v0.6.0 // indirect
 )

go.sum

@@ -1,10 +1,21 @@
-github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-cmp v0.5.7 h1:81/ik6ipDQS2aGcBfIN5dHDB36BwrStyeAQquSYCV4o=
+github.com/google/go-cmp v0.5.7/go.mod h1:n+brtR0CgQNWTVd5ZUFpTBC8YFBDLK/h/bpaJ8/DtOE=
+github.com/segmentio/asm v1.1.3/go.mod h1:Ld3L4ZXGNcSLRg4JBsZ3//1+f/TjYl0Mzen/DQy1EJg=
 github.com/segmentio/asm v1.2.0 h1:9BQrFxC+YOHJlTlHGkTrFWf59nbL3XnCoFLTwDCI7ys=
 github.com/segmentio/asm v1.2.0/go.mod h1:BqMnlJP91P8d+4ibuonYZw9mfnzI9HfxselHZr5aAcs=
-github.com/segmentio/encoding v0.4.1 h1:KLGaLSW0jrmhB58Nn4+98spfvPvmo4Ci1P/WIQ9wn7w=
+github.com/segmentio/encoding v0.3.6 h1:E6lVLyDPseWEulBmCmAKPanDd3jiyGDo5gMcugCRwZQ=
-go.unistack.org/micro-proto/v3 v3.4.1 h1:UTjLSRz2YZuaHk9iSlVqqsA50JQNAEK2ZFboGqtEa9Q=
+github.com/segmentio/encoding v0.3.6/go.mod h1:n0JeuIqEQrQoPDGsjo8UNd1iA0U8d8+oHAA4E3G3OxM=
-go.unistack.org/micro-proto/v3 v3.4.1/go.mod h1:okx/cnOhzuCX0ggl/vToatbCupi0O44diiiLLsZ93Zo=
+go.unistack.org/micro-proto/v4 v4.0.0 h1:+TAwKSlx48eLsNO2E2cO0JLE8we1KU2AuWe9Q310FuU=
-go.unistack.org/micro/v3 v3.10.88 h1:MxlzP+77Y6Kphb3lzHxROL4XfE/WdCQMQpnPv4D9Z8U=
+go.unistack.org/micro-proto/v4 v4.0.0/go.mod h1:ArmK7o+uFvxSY3dbJhKBBX4Pm1rhWdLEFf3LxBrMtec=
-go.unistack.org/micro/v3 v3.10.88/go.mod h1:erMgt3Bl7vQQ0e9UpQyR5NlLiZ9pKeEJ9+1tfYFaqUg=
+go.unistack.org/micro/v4 v4.0.1 h1:xo1IxbVfgh8i0eY0VeYa3cbb13u5n/Mxnp3FOgWD4Jo=
-golang.org/x/sys v0.28.0 h1:Fksou7UEQUWlKvIdsqzJmUmCX3cZuD2+P3XyyzwMhlA=
+go.unistack.org/micro/v4 v4.0.1/go.mod h1:p/J5UcSJjfHsWGT31uKoghQ5rUQZzQJBAFy+Z4+ZVMs=
-google.golang.org/protobuf v1.35.2 h1:8Ar7bF+apOIoThw1EdZl0p1oWvMqTHmpA2fRTyZO8io=
+golang.org/x/sys v0.0.0-20211110154304-99a53858aa08/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.6.0 h1:MVltZSvRTcU2ljQOhs94SXPftV6DCNnZViHeQps87pQ=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.28.1 h1:d0NfwRgPtno5B1Wa6L2DAG+KivqkdutMf1UhdNx175w=
+google.golang.org/protobuf v1.28.1/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=

json/codec_test.go

@@ -4,7 +4,7 @@ import (
 	"bytes"
 	"testing"
 
-	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v4/codec"
 )
 
 func TestFrame(t *testing.T) {
@@ -28,7 +28,7 @@ func TestFrameFlatten(t *testing.T) {
 		Name: &codec.Frame{Data: []byte("test")},
 	}
 
-	buf, err := NewCodec(codec.Flatten(true)).Marshal(s)
+	buf, err := NewCodec().Marshal(s)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -36,3 +36,15 @@ func TestFrameFlatten(t *testing.T) {
 		t.Fatalf("bytes not equal %s != %s", buf, `test`)
 	}
 }
+
+func TestReadBody(t *testing.T) {
+	s := &struct {
+		Name string
+	}{}
+	c := NewCodec()
+	b := bytes.NewReader(nil)
+	err := c.ReadBody(b, s)
+	if err != nil {
+		t.Fatal(err)
+	}
+}

json/json.go

@@ -1,11 +1,13 @@
 // Package json provides a json codec
-package json // import "go.unistack.org/micro-codec-segmentio/v3/json"
+package json // import "go.unistack.org/micro-codec-segmentio/v4/json"
 
 import (
+	"io"
+
 	"github.com/segmentio/encoding/json"
-	pb "go.unistack.org/micro-proto/v3/codec"
+	pb "go.unistack.org/micro-proto/v4/codec"
-	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v4/codec"
-	rutil "go.unistack.org/micro/v3/util/reflect"
+	rutil "go.unistack.org/micro/v4/util/reflect"
 )
 
 var (
@@ -19,9 +21,10 @@ var (
 	}
 )
 
-var (
+var _ codec.Codec = &jsonCodec{}
-	_ codec.Codec   = (*jsonCodec)(nil)
+
-	_ codec.CodecV2 = (*jsonCodecV2)(nil)
+const (
+	flattenTag = "flatten"
 )
 
 type JsonMarshalOptions struct {
@@ -46,12 +49,6 @@ type jsonCodec struct {
 	decodeFlags json.ParseFlags
 }
 
-type jsonCodecV2 struct {
-	opts        codec.Options
-	encodeFlags json.AppendFlags
-	decodeFlags json.ParseFlags
-}
-
 func getMarshalFlags(o JsonMarshalOptions) json.AppendFlags {
 	var encodeFlags json.AppendFlags
 
@@ -114,10 +111,8 @@ func (c *jsonCodec) Marshal(v interface{}, opts ...codec.Option) ([]byte, error)
 		o(&options)
 	}
 
-	if options.Flatten {
+	if nv, err := rutil.StructFieldByTag(v, options.TagName, flattenTag); err == nil {
-		if nv, err := rutil.StructFieldByTag(v, options.TagName, "flatten"); err == nil {
+		v = nv
-			v = nv
-		}
 	}
 
 	switch m := v.(type) {
@@ -125,10 +120,6 @@ func (c *jsonCodec) Marshal(v interface{}, opts ...codec.Option) ([]byte, error)
 		return m.Data, nil
 	case *pb.Frame:
 		return m.Data, nil
-	case codec.RawMessage:
-		return []byte(m), nil
-	case *codec.RawMessage:
-		return []byte(*m), nil
 	}
 
 	marshalOptions := DefaultMarshalOptions
@@ -154,10 +145,8 @@ func (c *jsonCodec) Unmarshal(b []byte, v interface{}, opts ...codec.Option) err
 		o(&options)
 	}
 
-	if options.Flatten {
+	if nv, err := rutil.StructFieldByTag(v, options.TagName, flattenTag); err == nil {
-		if nv, err := rutil.StructFieldByTag(v, options.TagName, "flatten"); err == nil {
+		v = nv
-			v = nv
-		}
 	}
 
 	switch m := v.(type) {
@@ -167,12 +156,6 @@ func (c *jsonCodec) Unmarshal(b []byte, v interface{}, opts ...codec.Option) err
 	case *pb.Frame:
 		m.Data = b
 		return nil
-	case *codec.RawMessage:
-		*m = append((*m)[0:0], b...)
-		return nil
-	case codec.RawMessage:
-		copy(m, b)
-		return nil
 	}
 
 	unmarshalOptions := DefaultUnmarshalOptions
@@ -186,89 +169,44 @@ func (c *jsonCodec) Unmarshal(b []byte, v interface{}, opts ...codec.Option) err
 	return err
 }
 
+func (c *jsonCodec) ReadHeader(conn io.Reader, m *codec.Message, t codec.MessageType) error {
+	return nil
+}
+
+func (c *jsonCodec) ReadBody(conn io.Reader, v interface{}) error {
+	if v == nil {
+		return nil
+	}
+
+	buf, err := io.ReadAll(conn)
+	if err != nil {
+		return err
+	} else if len(buf) == 0 {
+		return nil
+	}
+	return c.Unmarshal(buf, v)
+}
+
+func (c *jsonCodec) Write(conn io.Writer, m *codec.Message, v interface{}) error {
+	if v == nil {
+		return nil
+	}
+
+	buf, err := c.Marshal(v)
+	if err != nil {
+		return err
+	} else if len(buf) == 0 {
+		return codec.ErrInvalidMessage
+	}
+
+	_, err = conn.Write(buf)
+	return err
+}
+
 func (c *jsonCodec) String() string {
 	return "json"
 }
 
-func (c *jsonCodecV2) Marshal(b []byte, v interface{}, opts ...codec.Option) ([]byte, error) {
-	if v == nil {
-		return nil, nil
-	}
-
-	options := c.opts
-	for _, o := range opts {
-		o(&options)
-	}
-
-	if options.Flatten {
-		if nv, err := rutil.StructFieldByTag(v, options.TagName, "flatten"); err == nil {
-			v = nv
-		}
-	}
-
-	switch m := v.(type) {
-	case *codec.Frame:
-		return m.Data, nil
-	case *pb.Frame:
-		return m.Data, nil
-	}
-
-	marshalOptions := DefaultMarshalOptions
-	if options.Context != nil {
-		if f, ok := options.Context.Value(marshalOptionsKey{}).(JsonMarshalOptions); ok {
-			marshalOptions = f
-		}
-	}
-
-	var err error
-	b, err = json.Append(b[:0], v, getMarshalFlags(marshalOptions))
-	return b, err
-}
-
-func (c *jsonCodecV2) Unmarshal(b []byte, v interface{}, opts ...codec.Option) error {
-	if len(b) == 0 || v == nil {
-		return nil
-	}
-
-	options := c.opts
-	for _, o := range opts {
-		o(&options)
-	}
-
-	if options.Flatten {
-		if nv, err := rutil.StructFieldByTag(v, options.TagName, "flatten"); err == nil {
-			v = nv
-		}
-	}
-
-	switch m := v.(type) {
-	case *codec.Frame:
-		m.Data = b
-		return nil
-	case *pb.Frame:
-		m.Data = b
-		return nil
-	}
-
-	unmarshalOptions := DefaultUnmarshalOptions
-	if options.Context != nil {
-		if f, ok := options.Context.Value(unmarshalOptionsKey{}).(JsonUnmarshalOptions); ok {
-			unmarshalOptions = f
-		}
-	}
-
-	_, err := json.Parse(b, v, getUnmarshalFlags(unmarshalOptions))
-	return err
-}
-
-func (c *jsonCodecV2) String() string {
-	return "json"
-}
-
 func NewCodec(opts ...codec.Option) *jsonCodec {
 	return &jsonCodec{opts: codec.NewOptions(opts...)}
 }
-
-func NewCodecV2(opts ...codec.Option) *jsonCodecV2 {
-	return &jsonCodecV2{opts: codec.NewOptions(opts...)}
-}

json/options.go

@@ -1,7 +1,7 @@
 package json
 
 import (
-	codec "go.unistack.org/micro/v3/codec"
+	codec "go.unistack.org/micro/v4/codec"
 )
 
 type unmarshalOptionsKey struct{}

proto/codec_test.go

@@ -4,7 +4,7 @@ import (
 	"bytes"
 	"testing"
 
-	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v4/codec"
 )
 
 func TestFrame(t *testing.T) {
@@ -28,7 +28,7 @@ func TestFrameFlatten(t *testing.T) {
 		Name: &codec.Frame{Data: []byte("test")},
 	}
 
-	buf, err := NewCodec(codec.Flatten(true)).Marshal(s)
+	buf, err := NewCodec().Marshal(s)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -36,3 +36,16 @@ func TestFrameFlatten(t *testing.T) {
 		t.Fatalf("bytes not equal %s != %s", buf, `test`)
 	}
 }
+
+func TestReadBody(t *testing.T) {
+	t.Skip("no proto generated")
+	s := &struct {
+		Name string
+	}{}
+	c := NewCodec()
+	b := bytes.NewReader(nil)
+	err := c.ReadBody(b, s)
+	if err != nil {
+		t.Fatal(err)
+	}
+}

proto/proto.go

@@ -1,11 +1,13 @@
 // Package proto provides a proto codec
-package proto // import "go.unistack.org/micro-codec-segmentio/v3/proto"
+package proto // import "go.unistack.org/micro-codec-segmentio/v4/proto"
 
 import (
+	"io"
+
 	"github.com/segmentio/encoding/proto"
-	pb "go.unistack.org/micro-proto/v3/codec"
+	pb "go.unistack.org/micro-proto/v4/codec"
-	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v4/codec"
-	rutil "go.unistack.org/micro/v3/util/reflect"
+	rutil "go.unistack.org/micro/v4/util/reflect"
 	newproto "google.golang.org/protobuf/proto"
 )
 
@@ -15,6 +17,10 @@ type protoCodec struct {
 
 var _ codec.Codec = &protoCodec{}
 
+const (
+	flattenTag = "flatten"
+)
+
 func (c *protoCodec) Marshal(v interface{}, opts ...codec.Option) ([]byte, error) {
 	if v == nil {
 		return nil, nil
@@ -25,10 +31,8 @@ func (c *protoCodec) Marshal(v interface{}, opts ...codec.Option) ([]byte, error
 		o(&options)
 	}
 
-	if options.Flatten {
+	if nv, nerr := rutil.StructFieldByTag(v, options.TagName, flattenTag); nerr == nil {
-		if nv, nerr := rutil.StructFieldByTag(v, options.TagName, "flatten"); nerr == nil {
+		v = nv
-			v = nv
-		}
 	}
 
 	switch m := v.(type) {
@@ -43,13 +47,9 @@ func (c *protoCodec) Marshal(v interface{}, opts ...codec.Option) ([]byte, error
 		return proto.Marshal(m)
 	case newproto.Message:
 		return proto.Marshal(m)
-	case codec.RawMessage:
-		return []byte(m), nil
-	case *codec.RawMessage:
-		return []byte(*m), nil
-	default:
-		return nil, codec.ErrInvalidMessage
 	}
+
+	return nil, codec.ErrInvalidMessage
 }
 
 func (c *protoCodec) Unmarshal(d []byte, v interface{}, opts ...codec.Option) error {
@@ -62,10 +62,8 @@ func (c *protoCodec) Unmarshal(d []byte, v interface{}, opts ...codec.Option) er
 		o(&options)
 	}
 
-	if options.Flatten {
+	if nv, nerr := rutil.StructFieldByTag(v, options.TagName, flattenTag); nerr == nil {
-		if nv, nerr := rutil.StructFieldByTag(v, options.TagName, "flatten"); nerr == nil {
+		v = nv
-			v = nv
-		}
 	}
 
 	switch m := v.(type) {
@@ -75,12 +73,6 @@ func (c *protoCodec) Unmarshal(d []byte, v interface{}, opts ...codec.Option) er
 	case *pb.Frame:
 		m.Data = d
 		return nil
-	case *codec.RawMessage:
-		*m = append((*m)[0:0], d...)
-		return nil
-	case codec.RawMessage:
-		copy(m, d)
-		return nil
 	}
 
 	switch m := v.(type) {
@@ -88,9 +80,43 @@ func (c *protoCodec) Unmarshal(d []byte, v interface{}, opts ...codec.Option) er
 		return proto.Unmarshal(d, m)
 	case newproto.Message:
 		return proto.Unmarshal(d, m)
-	default:
+
+	}
+
+	return codec.ErrInvalidMessage
+}
+
+func (c *protoCodec) ReadHeader(conn io.Reader, m *codec.Message, t codec.MessageType) error {
+	return nil
+}
+
+func (c *protoCodec) ReadBody(conn io.Reader, v interface{}) error {
+	if v == nil {
+		return nil
+	}
+	buf, err := io.ReadAll(conn)
+	if err != nil {
+		return err
+	} else if len(buf) == 0 {
+		return nil
+	}
+	return c.Unmarshal(buf, v)
+}
+
+func (c *protoCodec) Write(conn io.Writer, m *codec.Message, v interface{}) error {
+	if v == nil {
+		return nil
+	}
+
+	buf, err := c.Marshal(v)
+	if err != nil {
+		return err
+	} else if len(buf) == 0 {
 		return codec.ErrInvalidMessage
 	}
+
+	_, err = conn.Write(buf)
+	return err
 }
 
 func (c *protoCodec) String() string {