Update workflows (#196)

Co-authored-by: Aleksandr Tolstikhin <atolstikhin@mtsbank.ru>
Reviewed-on: #196
Co-authored-by: Александр Толстихин <tolstihin1996@mail.ru>
Co-committed-by: Александр Толстихин <tolstihin1996@mail.ru>

.gitea/workflows/job_lint.yml

@@ -0,0 +1,29 @@
+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

@@ -0,0 +1,34 @@
+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

@@ -0,0 +1,53 @@
+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

@@ -1,19 +0,0 @@
-# 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

@@ -1,20 +0,0 @@
-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

@@ -1,21 +0,0 @@
-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

@@ -1,47 +0,0 @@
-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

@@ -1,78 +0,0 @@
-# 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

@@ -1,27 +0,0 @@
-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

@@ -1,47 +0,0 @@
-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

.gitignore

@@ -0,0 +1,24 @@
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+bin
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Go workspace file
+go.work
+
+# General
+.DS_Store
+.idea
+.vscode

.golangci.yml

@@ -1,44 +1,5 @@
 run:
-  concurrency: 4
+  concurrency: 8
   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

go.mod

@@ -1,16 +1,23 @@
 module go.unistack.org/micro-server-http/v3
 
-go 1.18
+go 1.22.7
+
+toolchain go1.23.3
 
 require (
-	go.unistack.org/micro-proto/v3 v3.3.1
-	go.unistack.org/micro/v3 v3.10.14
-	golang.org/x/net v0.7.0
+	go.unistack.org/micro-client-http/v3 v3.9.14
+	go.unistack.org/micro-codec-yaml/v3 v3.10.2
+	go.unistack.org/micro-proto/v3 v3.4.1
+	go.unistack.org/micro/v3 v3.10.108
+	golang.org/x/net v0.31.0
 )
 
 require (
-	github.com/golang/protobuf v1.5.2 // indirect
-	github.com/google/gnostic v0.6.9 // indirect
-	google.golang.org/protobuf v1.28.1 // indirect
+	github.com/google/gnostic v0.7.0 // indirect
+	github.com/google/gnostic-models v0.6.9-0.20230804172637-c7be7c783f49 // indirect
+	golang.org/x/sys v0.27.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20241118233622-e639e219e697 // indirect
+	google.golang.org/grpc v1.68.0 // indirect
+	google.golang.org/protobuf v1.35.2 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

handler.go

@@ -6,14 +6,21 @@ import (
 	"io"
 	"net/http"
 	"reflect"
+	"slices"
+	"strconv"
 	"strings"
 	"sync"
+	"time"
 
 	"go.unistack.org/micro/v3/errors"
 	"go.unistack.org/micro/v3/logger"
 	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/meter"
+	"go.unistack.org/micro/v3/options"
 	"go.unistack.org/micro/v3/register"
+	"go.unistack.org/micro/v3/semconv"
 	"go.unistack.org/micro/v3/server"
+	"go.unistack.org/micro/v3/tracer"
 	rhttp "go.unistack.org/micro/v3/util/http"
 	rflutil "go.unistack.org/micro/v3/util/reflect"
 )
@@ -22,7 +29,7 @@ var (
 	DefaultErrorHandler = func(ctx context.Context, s server.Handler, w http.ResponseWriter, r *http.Request, err error, status int) {
 		w.WriteHeader(status)
 		if _, cerr := w.Write([]byte(err.Error())); cerr != nil {
-			logger.DefaultLogger.Errorf(ctx, "write failed: %v", cerr)
+			logger.DefaultLogger.Error(ctx, "write error", cerr)
 		}
 	}
 	DefaultContentType = "application/json"
@@ -60,20 +67,297 @@ func (h *httpHandler) Options() server.HandlerOptions {
 	return h.opts
 }
 
-func (h *httpServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
-	// check for http.HandlerFunc handlers
-	if ph, _, err := h.pathHandlers.Search(r.Method, r.URL.Path); err == nil {
-		ph.(http.HandlerFunc)(w, r)
-		return
+func (h *Server) HTTPHandlerFunc(handler interface{}) (http.HandlerFunc, error) {
+	if handler == nil {
+		return nil, fmt.Errorf("invalid handler specified: %v", handler)
 	}
 
+	rtype := reflect.TypeOf(handler)
+	if rtype.NumIn() != 3 {
+		return nil, fmt.Errorf("invalid handler, NumIn != 3: %v", rtype.NumIn())
+	}
+
+	argType := rtype.In(1)
+	replyType := rtype.In(2)
+
+	// First arg need not be a pointer.
+	if !isExportedOrBuiltinType(argType) {
+		return nil, fmt.Errorf("invalid handler, argument type not exported: %v", argType)
+	}
+
+	if replyType.Kind() != reflect.Ptr {
+		return nil, fmt.Errorf("invalid handler, reply type not a pointer: %v", replyType)
+	}
+
+	// Reply type must be exported.
+	if !isExportedOrBuiltinType(replyType) {
+		return nil, fmt.Errorf("invalid handler, reply type not exported: %v", replyType)
+	}
+
+	if rtype.NumOut() != 1 {
+		return nil, fmt.Errorf("invalid handler, has wrong number of outs: %v", rtype.NumOut())
+	}
+
+	// The return type of the method must be error.
+	if returnType := rtype.Out(0); returnType != typeOfError {
+		return nil, fmt.Errorf("invalid handler, returns %v not error", returnType.String())
+	}
+
+	return func(w http.ResponseWriter, r *http.Request) {
+		ct := DefaultContentType
+		if htype := r.Header.Get(metadata.HeaderContentType); htype != "" {
+			ct = htype
+		}
+
+		ctx := context.WithValue(r.Context(), rspCodeKey{}, &rspCodeVal{})
+		ctx = context.WithValue(ctx, rspHeaderKey{}, &rspHeaderVal{})
+		md, ok := metadata.FromIncomingContext(ctx)
+		if !ok {
+			md = metadata.New(len(r.Header) + 8)
+		}
+		for k, v := range r.Header {
+			md[k] = strings.Join(v, ", ")
+		}
+		md["RemoteAddr"] = r.RemoteAddr
+		md["Method"] = r.Method
+		md["URL"] = r.URL.String()
+		md["Proto"] = r.Proto
+		md["Content-Length"] = fmt.Sprintf("%d", r.ContentLength)
+		md["Transfer-Encoding"] = strings.Join(r.TransferEncoding, ",")
+		md["Host"] = r.Host
+		md["RequestURI"] = r.RequestURI
+		if r.TLS != nil {
+			md["TLS"] = "true"
+			md["TLS-ALPN"] = r.TLS.NegotiatedProtocol
+			md["TLS-ServerName"] = r.TLS.ServerName
+		}
+
+		ctx = metadata.NewIncomingContext(ctx, md)
+
+		path := r.URL.Path
+
+		if r.Body != nil {
+			defer r.Body.Close()
+		}
+
+		matches := make(map[string]interface{})
+		var match bool
+		var hldr *patHandler
+		var handler *httpHandler
+
+		for _, shdlr := range h.handlers {
+			hdlr := shdlr.(*httpHandler)
+			fh, mp, err := hdlr.handlers.Search(r.Method, path)
+			if err == nil {
+				match = true
+				for k, v := range mp {
+					matches[k] = v
+				}
+				hldr = fh.(*patHandler)
+				handler = hdlr
+				break
+			} else if err == rhttp.ErrMethodNotAllowed && !h.registerRPC {
+				w.WriteHeader(http.StatusMethodNotAllowed)
+				_, _ = w.Write([]byte("not matching route found"))
+				return
+			}
+		}
+
+		if !match && h.registerRPC {
+			microMethod, mok := md.Get(metadata.HeaderEndpoint)
+			if mok {
+				serviceMethod := strings.Split(microMethod, ".")
+				if len(serviceMethod) == 2 {
+					if shdlr, ok := h.handlers[serviceMethod[0]]; ok {
+						hdlr := shdlr.(*httpHandler)
+						fh, mp, err := hdlr.handlers.Search(http.MethodPost, "/"+microMethod)
+						if err == nil {
+							match = true
+							for k, v := range mp {
+								matches[k] = v
+							}
+							hldr = fh.(*patHandler)
+							handler = hdlr
+						}
+					}
+				}
+			}
+		}
+
+		// get fields from url values
+		if len(r.URL.RawQuery) > 0 {
+			umd, cerr := rflutil.URLMap(r.URL.RawQuery)
+			if cerr != nil {
+				w.WriteHeader(http.StatusInternalServerError)
+				_, _ = w.Write([]byte(cerr.Error()))
+				return
+			}
+			for k, v := range umd {
+				matches[k] = v
+			}
+		}
+
+		cf, err := h.newCodec(ct)
+		if err != nil {
+			w.WriteHeader(http.StatusUnsupportedMediaType)
+			return
+		}
+
+		var argv, replyv reflect.Value
+
+		// Decode the argument value.
+		argIsValue := false // if true, need to indirect before calling.
+		if hldr.mtype.ArgType.Kind() == reflect.Ptr {
+			argv = reflect.New(hldr.mtype.ArgType.Elem())
+		} else {
+			argv = reflect.New(hldr.mtype.ArgType)
+			argIsValue = true
+		}
+
+		if argIsValue {
+			argv = argv.Elem()
+		}
+
+		// reply value
+		replyv = reflect.New(hldr.mtype.ReplyType.Elem())
+
+		function := hldr.mtype.method.Func
+		var returnValues []reflect.Value
+
+		if r.Body != nil {
+			var buf []byte
+			buf, err = io.ReadAll(r.Body)
+			if err != nil && err != io.EOF {
+				h.errorHandler(ctx, handler, w, r, err, http.StatusInternalServerError)
+				return
+			}
+
+			if err = cf.Unmarshal(buf, argv.Interface()); err != nil {
+				h.errorHandler(ctx, handler, w, r, err, http.StatusBadRequest)
+				return
+			}
+		}
+
+		matches = rflutil.FlattenMap(matches)
+		if err = rflutil.Merge(argv.Interface(), matches, rflutil.SliceAppend(true), rflutil.Tags([]string{"protobuf", "json"})); err != nil {
+			h.errorHandler(ctx, handler, w, r, err, http.StatusBadRequest)
+			return
+		}
+
+		hr := &rpcRequest{
+			codec:       cf,
+			service:     handler.sopts.Name,
+			contentType: ct,
+			method:      fmt.Sprintf("%s.%s", hldr.name, hldr.mtype.method.Name),
+			endpoint:    fmt.Sprintf("%s.%s", hldr.name, hldr.mtype.method.Name),
+			payload:     argv.Interface(),
+			header:      md,
+		}
+
+		// define the handler func
+		fn := func(fctx context.Context, req server.Request, rsp interface{}) (err error) {
+			returnValues = function.Call([]reflect.Value{hldr.rcvr, hldr.mtype.prepareContext(fctx), argv, reflect.ValueOf(rsp)})
+
+			// The return value for the method is an error.
+			if rerr := returnValues[0].Interface(); rerr != nil {
+				err = rerr.(error)
+			}
+
+			md, ok := metadata.FromOutgoingContext(ctx)
+			if !ok {
+				md = metadata.New(0)
+			}
+			if nmd, ok := metadata.FromOutgoingContext(fctx); ok {
+				for k, v := range nmd {
+					md.Set(k, v)
+				}
+			}
+			metadata.SetOutgoingContext(ctx, md)
+
+			return err
+		}
+
+		// wrap the handler func
+		h.opts.Hooks.EachNext(func(hook options.Hook) {
+			if h, ok := hook.(server.HookHandler); ok {
+				fn = h(fn)
+			}
+		})
+
+		if ct == "application/x-www-form-urlencoded" {
+			cf, err = h.newCodec(DefaultContentType)
+			if err != nil {
+				h.errorHandler(ctx, handler, w, r, err, http.StatusInternalServerError)
+				return
+			}
+			ct = DefaultContentType
+		}
+
+		scode := int(200)
+		appErr := fn(ctx, hr, replyv.Interface())
+
+		w.Header().Set(metadata.HeaderContentType, ct)
+		if md, ok := metadata.FromOutgoingContext(ctx); ok {
+			for k, v := range md {
+				w.Header().Set(k, v)
+			}
+		}
+		if md := getRspHeader(ctx); md != nil {
+			for k, v := range md {
+				for _, vv := range v {
+					w.Header().Add(k, vv)
+				}
+			}
+		}
+		if nct := w.Header().Get(metadata.HeaderContentType); nct != ct {
+			if cf, err = h.newCodec(nct); err != nil {
+				h.errorHandler(ctx, nil, w, r, err, http.StatusInternalServerError)
+				return
+			}
+		}
+
+		var buf []byte
+		if appErr != nil {
+			switch verr := appErr.(type) {
+			case *errors.Error:
+				scode = int(verr.Code)
+				buf, err = cf.Marshal(verr)
+			case *Error:
+				buf, err = cf.Marshal(verr.err)
+			default:
+				buf, err = cf.Marshal(appErr)
+			}
+		} else {
+			buf, err = cf.Marshal(replyv.Interface())
+		}
+
+		if err != nil && handler.sopts.Logger.V(logger.ErrorLevel) {
+			handler.sopts.Logger.Error(handler.sopts.Context, "handler error", err)
+			return
+		}
+
+		if nscode := GetRspCode(ctx); nscode != 0 {
+			scode = nscode
+		}
+		w.WriteHeader(scode)
+
+		if _, cerr := w.Write(buf); cerr != nil {
+			handler.sopts.Logger.Error(ctx, "write failed", cerr)
+		}
+	}, nil
+}
+
+func (h *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	ct := DefaultContentType
 	if htype := r.Header.Get(metadata.HeaderContentType); htype != "" {
 		ct = htype
 	}
 
+	ts := time.Now()
+
 	ctx := context.WithValue(r.Context(), rspCodeKey{}, &rspCodeVal{})
 	ctx = context.WithValue(ctx, rspHeaderKey{}, &rspHeaderVal{})
+
 	md, ok := metadata.FromIncomingContext(ctx)
 	if !ok {
 		md = metadata.New(len(r.Header) + 8)
@@ -82,16 +366,22 @@ func (h *httpServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		md[k] = strings.Join(v, ", ")
 	}
 	md["RemoteAddr"] = r.RemoteAddr
+	if r.TLS != nil {
+		md["Scheme"] = "https"
+	} else {
+		md["Scheme"] = "http"
+	}
 	md["Method"] = r.Method
 	md["URL"] = r.URL.String()
 	md["Proto"] = r.Proto
 	md["ContentLength"] = fmt.Sprintf("%d", r.ContentLength)
-	md["TransferEncoding"] = strings.Join(r.TransferEncoding, ",")
+	if len(r.TransferEncoding) > 0 {
+		md["TransferEncoding"] = strings.Join(r.TransferEncoding, ",")
+	}
 	md["Host"] = r.Host
 	md["RequestURI"] = r.RequestURI
 	ctx = metadata.NewIncomingContext(ctx, md)
-
-	defer r.Body.Close()
+	ctx = metadata.NewOutgoingContext(ctx, metadata.New(0))
 
 	path := r.URL.Path
 	if !strings.HasPrefix(path, "/") {
@@ -143,16 +433,116 @@ func (h *httpServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
+	var sp tracer.Span
 	if !match && h.hd != nil {
 		if hdlr, ok := h.hd.Handler().(http.Handler); ok {
-			hdlr.ServeHTTP(w, r)
+			endpointName := fmt.Sprintf("%s.%s", hldr.name, hldr.mtype.method.Name)
+			if !slices.Contains(tracer.DefaultSkipEndpoints, endpointName) {
+				ctx, sp = h.opts.Tracer.Start(ctx, "rpc-server",
+					tracer.WithSpanKind(tracer.SpanKindServer),
+					tracer.WithSpanLabels(
+						"endpoint", endpointName,
+					),
+				)
+				defer func() {
+					n := GetRspCode(ctx)
+					if s, _ := sp.Status(); s != tracer.SpanStatusError && n > 399 {
+						sp.SetStatus(tracer.SpanStatusError, http.StatusText(n))
+					}
+					sp.Finish()
+				}()
+			}
+
+			if !slices.Contains(meter.DefaultSkipEndpoints, endpointName) {
+				h.opts.Meter.Counter(semconv.ServerRequestInflight, "endpoint", endpointName, "server", "http").Inc()
+
+				defer func() {
+					n := GetRspCode(ctx)
+					if n > 399 {
+						h.opts.Meter.Counter(semconv.ServerRequestTotal, "endpoint", endpointName, "server", "http", "status", "success", "code", strconv.Itoa(n)).Inc()
+					} else {
+						h.opts.Meter.Counter(semconv.ServerRequestTotal, "endpoint", endpointName, "server", "http", "status", "failure", "code", strconv.Itoa(n)).Inc()
+					}
+					te := time.Since(ts)
+					h.opts.Meter.Summary(semconv.ServerRequestLatencyMicroseconds, "endpoint", endpointName, "server", "http").Update(te.Seconds())
+					h.opts.Meter.Histogram(semconv.ServerRequestDurationSeconds, "endpoint", endpointName, "server", "http").Update(te.Seconds())
+					h.opts.Meter.Counter(semconv.ServerRequestInflight, "endpoint", endpointName, "server", "http").Dec()
+				}()
+			}
+
+			hdlr.ServeHTTP(w, r.WithContext(ctx))
 			return
 		}
 	} else if !match {
+		// check for http.HandlerFunc handlers
+		if !slices.Contains(tracer.DefaultSkipEndpoints, r.URL.Path) {
+			ctx, sp = h.opts.Tracer.Start(ctx, "rpc-server",
+				tracer.WithSpanKind(tracer.SpanKindServer),
+				tracer.WithSpanLabels(
+					"endpoint", r.URL.Path,
+					"server", "http",
+				),
+			)
+
+			defer func() {
+				if n := GetRspCode(ctx); n > 399 {
+					sp.SetStatus(tracer.SpanStatusError, http.StatusText(n))
+				} else {
+					sp.SetStatus(tracer.SpanStatusError, http.StatusText(http.StatusNotFound))
+				}
+				sp.Finish()
+			}()
+		}
+		if ph, _, err := h.pathHandlers.Search(r.Method, r.URL.Path); err == nil {
+			ph.(http.HandlerFunc)(w, r.WithContext(ctx))
+			return
+		}
 		h.errorHandler(ctx, nil, w, r, fmt.Errorf("not matching route found"), http.StatusNotFound)
 		return
 	}
 
+	endpointName := fmt.Sprintf("%s.%s", hldr.name, hldr.mtype.method.Name)
+
+	topts := []tracer.SpanOption{
+		tracer.WithSpanKind(tracer.SpanKindServer),
+		tracer.WithSpanLabels(
+			"endpoint", endpointName,
+			"server", "http",
+		),
+	}
+
+	if slices.Contains(tracer.DefaultSkipEndpoints, endpointName) {
+		topts = append(topts, tracer.WithSpanRecord(false))
+	}
+
+	ctx, sp = h.opts.Tracer.Start(ctx, "rpc-server", topts...)
+
+	if !slices.Contains(meter.DefaultSkipEndpoints, handler.name) {
+		defer func() {
+			te := time.Since(ts)
+			h.opts.Meter.Summary(semconv.ServerRequestLatencyMicroseconds, "endpoint", handler.name, "server", "http").Update(te.Seconds())
+			h.opts.Meter.Histogram(semconv.ServerRequestDurationSeconds, "endpoint", handler.name, "server", "http").Update(te.Seconds())
+			h.opts.Meter.Counter(semconv.ServerRequestInflight, "endpoint", handler.name, "server", "http").Dec()
+
+			n := GetRspCode(ctx)
+			if n > 399 {
+				h.opts.Meter.Counter(semconv.ServerRequestTotal, "endpoint", handler.name, "server", "http", "status", "failure", "code", strconv.Itoa(n)).Inc()
+			} else {
+				h.opts.Meter.Counter(semconv.ServerRequestTotal, "endpoint", handler.name, "server", "http", "status", "success", "code", strconv.Itoa(n)).Inc()
+			}
+		}()
+	}
+
+	defer func() {
+		n := GetRspCode(ctx)
+		if n > 399 {
+			if s, _ := sp.Status(); s != tracer.SpanStatusError {
+				sp.SetStatus(tracer.SpanStatusError, http.StatusText(n))
+			}
+		}
+		sp.Finish()
+	}()
+
 	// get fields from url values
 	if len(r.URL.RawQuery) > 0 {
 		umd, cerr := rflutil.URLMap(r.URL.RawQuery)
@@ -165,6 +555,10 @@ func (h *httpServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
+	if r.Body != nil {
+		defer r.Body.Close()
+	}
+
 	cf, err := h.newCodec(ct)
 	if err != nil {
 		h.errorHandler(ctx, nil, w, r, err, http.StatusBadRequest)
@@ -192,21 +586,26 @@ func (h *httpServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	function := hldr.mtype.method.Func
 	var returnValues []reflect.Value
 
-	buf, err := io.ReadAll(r.Body)
-	if err != nil && err != io.EOF {
-		h.errorHandler(ctx, handler, w, r, err, http.StatusInternalServerError)
-		return
+	if r.Body != nil {
+		var buf []byte
+		buf, err = io.ReadAll(r.Body)
+		if err != nil && err != io.EOF {
+			h.errorHandler(ctx, handler, w, r, err, http.StatusInternalServerError)
+			return
+		}
+
+		if err = cf.Unmarshal(buf, argv.Interface()); err != nil {
+			h.errorHandler(ctx, handler, w, r, err, http.StatusBadRequest)
+			return
+		}
 	}
 
-	if err = cf.Unmarshal(buf, argv.Interface()); err != nil {
-		h.errorHandler(ctx, handler, w, r, err, http.StatusBadRequest)
-		return
-	}
-
-	matches = rflutil.FlattenMap(matches)
-	if err = rflutil.Merge(argv.Interface(), matches, rflutil.SliceAppend(true), rflutil.Tags([]string{"protobuf", "json"})); err != nil {
-		h.errorHandler(ctx, handler, w, r, err, http.StatusBadRequest)
-		return
+	if len(matches) > 0 {
+		matches = rflutil.FlattenMap(matches)
+		if err = rflutil.Merge(argv.Interface(), matches, rflutil.SliceAppend(true), rflutil.Tags([]string{"protobuf", "json"})); err != nil {
+			h.errorHandler(ctx, handler, w, r, err, http.StatusBadRequest)
+			return
+		}
 	}
 
 	hr := &rpcRequest{
@@ -239,13 +638,18 @@ func (h *httpServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		}
 		metadata.SetOutgoingContext(ctx, md)
 
+		if err != nil && sp != nil {
+			sp.SetStatus(tracer.SpanStatusError, err.Error())
+		}
+
 		return err
 	}
 
-	// wrap the handler func
-	for i := len(handler.sopts.HdlrWrappers); i > 0; i-- {
-		fn = handler.sopts.HdlrWrappers[i-1](fn)
-	}
+	h.opts.Hooks.EachNext(func(hook options.Hook) {
+		if h, ok := hook.(server.HookHandler); ok {
+			fn = h(fn)
+		}
+	})
 
 	if ct == "application/x-www-form-urlencoded" {
 		cf, err = h.newCodec(DefaultContentType)
@@ -274,11 +678,12 @@ func (h *httpServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	}
 	if nct := w.Header().Get(metadata.HeaderContentType); nct != ct {
 		if cf, err = h.newCodec(nct); err != nil {
-			h.errorHandler(ctx, nil, w, r, err, http.StatusBadRequest)
+			h.errorHandler(ctx, nil, w, r, err, http.StatusInternalServerError)
 			return
 		}
 	}
 
+	var buf []byte
 	if appErr != nil {
 		switch verr := appErr.(type) {
 		case *errors.Error:
@@ -293,17 +698,18 @@ func (h *httpServer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		buf, err = cf.Marshal(replyv.Interface())
 	}
 
-	if err != nil && handler.sopts.Logger.V(logger.ErrorLevel) {
-		handler.sopts.Logger.Errorf(handler.sopts.Context, "handler err: %v", err)
-		return
-	}
-
-	if nscode := GetRspCode(ctx); nscode != 0 {
+	if err != nil {
+		if handler.sopts.Logger.V(logger.ErrorLevel) {
+			handler.sopts.Logger.Error(handler.sopts.Context, "handler error", err)
+		}
+		scode = http.StatusInternalServerError
+	} else if nscode := GetRspCode(ctx); nscode != 0 {
 		scode = nscode
 	}
+
 	w.WriteHeader(scode)
 
 	if _, cerr := w.Write(buf); cerr != nil {
-		handler.sopts.Logger.Errorf(ctx, "write failed: %v", cerr)
+		handler.sopts.Logger.Error(ctx, "respoonse write error", cerr)
 	}
 }

handler/generate.go

@@ -0,0 +1,12 @@
+package handler
+
+import (
+	// import required packages
+	_ "go.unistack.org/micro-proto/v3/openapiv3"
+)
+
+//go:generate sh -c "curl -L https://github.com/swagger-api/swagger-ui/archive/refs/tags/v4.18.3.zip -o - | bsdtar -C swagger-ui --strip-components=2 -xv swagger-ui-4.18.3/dist && rm swagger-ui/*.map swagger-ui/*-es-*.js swagger-ui/swagger-ui.js swagger-ui/swagger-initializer.js"
+
+//go:generate sh -c "protoc -I./ -I$(go list -f '{{ .Dir }}' -m go.unistack.org/micro-proto/v3) --go-micro_out='components=micro|http|server',standalone=false,debug=true,paths=source_relative:./ ./meter/meter.proto"
+
+//go:generate sh -c "protoc -I./ -I$(go list -f '{{ .Dir }}' -m go.unistack.org/micro-proto/v3) --go-micro_out='components=micro|http|server',standalone=false,debug=true,paths=source_relative:./ ./health/health.proto"

handler/graphql/graphql.go

@@ -0,0 +1,77 @@
+//go:build ignore
+
+package graphql_handler
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/99designs/gqlgen/graphql"
+	"go.unistack.org/micro/v3/logger"
+	"go.unistack.org/micro/v3/store"
+)
+
+var _ graphql.Cache = (*cacheWrapper)(nil)
+
+type Handler struct {
+	opts Options
+}
+
+type Option func(*Options)
+
+type Options struct {
+	cache *cacheWrapper
+	Path  string
+}
+
+type cacheWrapper struct {
+	s store.Store
+	l logger.Logger
+}
+
+func (c *cacheWrapper) Get(ctx context.Context, key string) (interface{}, bool) {
+	var val interface{}
+	if err := c.s.Read(ctx, key, val); err != nil && err != store.ErrNotFound {
+		c.l.Error(ctx, fmt.Sprintf("cache.Get %s failed", key), err)
+		return nil, false
+	}
+	return val, true
+}
+
+func (c *cacheWrapper) Add(ctx context.Context, key string, val interface{}) {
+	if err := c.s.Write(ctx, key, val); err != nil {
+		c.l.Error(ctx, fmt.Sprintf("cache.Add %s failed", key), err)
+	}
+}
+
+func Store(s store.Store) Option {
+	return func(o *Options) {
+		if o.cache == nil {
+			o.cache = &cacheWrapper{}
+		}
+		o.cache.s = s
+	}
+}
+
+func Logger(l logger.Logger) Option {
+	return func(o *Options) {
+		if o.cache == nil {
+			o.cache = &cacheWrapper{}
+		}
+		o.cache.l = l
+	}
+}
+
+func Path(path string) Option {
+	return func(o *Options) {
+		o.Path = path
+	}
+}
+
+func NewHandler(opts ...Option) *Handler {
+	options := Options{}
+	for _, o := range opts {
+		o(&options)
+	}
+	return &Handler{opts: options}
+}

handler/health/generate.go

@@ -1,8 +0,0 @@
-package health
-
-//go:generate sh -c "protoc -I./ -I$(go list -f '{{ .Dir }}' -m go.unistack.org/micro-proto/v3) --go-micro_out='components=micro|http|server',standalone=false,debug=true,paths=source_relative:./ health.proto"
-
-import (
-	// import required packages
-	_ "go.unistack.org/micro-proto/v3/openapiv3"
-)

handler/health/health.go

@@ -1,4 +1,4 @@
-package health // import "go.unistack.org/micro-server-http/v3/handler/health"
+package health_handler
 
 import (
 	"context"
@@ -13,15 +13,30 @@ type Handler struct {
 	opts Options
 }
 
-type CheckFunc func(context.Context) error
+type (
+	CheckFunc func(context.Context) error
+	Option    func(*Options)
+)
 
-type Option func(*Options)
+type Stater interface {
+	Live() bool
+	Ready() bool
+	Health() bool
+}
 
 type Options struct {
-	Version     string
-	Name        string
-	LiveChecks  []CheckFunc
-	ReadyChecks []CheckFunc
+	Version      string
+	Name         string
+	Staters      []Stater
+	LiveChecks   []CheckFunc
+	ReadyChecks  []CheckFunc
+	HealthChecks []CheckFunc
+}
+
+func Service(s ...Stater) Option {
+	return func(o *Options) {
+		o.Staters = append(o.Staters, s...)
+	}
 }
 
 func LiveChecks(fns ...CheckFunc) Option {
@@ -36,6 +51,12 @@ func ReadyChecks(fns ...CheckFunc) Option {
 	}
 }
 
+func HealthChecks(fns ...CheckFunc) Option {
+	return func(o *Options) {
+		o.HealthChecks = append(o.HealthChecks, fns...)
+	}
+}
+
 func Name(name string) Option {
 	return func(o *Options) {
 		o.Name = name
@@ -56,18 +77,51 @@ func NewHandler(opts ...Option) *Handler {
 	return &Handler{opts: options}
 }
 
+func (h *Handler) Healthy(ctx context.Context, req *codecpb.Frame, rsp *codecpb.Frame) error {
+	var err error
+
+	for _, s := range h.opts.Staters {
+		if !s.Health() {
+			return errors.ServiceUnavailable(h.opts.Name, "%v", err)
+		}
+	}
+
+	for _, fn := range h.opts.HealthChecks {
+		if err = fn(ctx); err != nil {
+			return errors.ServiceUnavailable(h.opts.Name, "%v", err)
+		}
+	}
+
+	return nil
+}
+
 func (h *Handler) Live(ctx context.Context, req *codecpb.Frame, rsp *codecpb.Frame) error {
 	var err error
+
+	for _, s := range h.opts.Staters {
+		if !s.Live() {
+			return errors.ServiceUnavailable(h.opts.Name, "%v", err)
+		}
+	}
+
 	for _, fn := range h.opts.LiveChecks {
 		if err = fn(ctx); err != nil {
 			return errors.ServiceUnavailable(h.opts.Name, "%v", err)
 		}
 	}
+
 	return nil
 }
 
 func (h *Handler) Ready(ctx context.Context, req *codecpb.Frame, rsp *codecpb.Frame) error {
 	var err error
+
+	for _, s := range h.opts.Staters {
+		if !s.Ready() {
+			return errors.ServiceUnavailable(h.opts.Name, "%v", err)
+		}
+	}
+
 	for _, fn := range h.opts.ReadyChecks {
 		if err = fn(ctx); err != nil {
 			return errors.ServiceUnavailable(h.opts.Name, "%v", err)

handler/health/health.proto

@@ -1,13 +1,29 @@
 syntax = "proto3";
 
 package micro.server.http.v3.handler.health;
-option go_package = "go.unistack.org/micro-server-http/v3/handler/health;health";
+option go_package = "go.unistack.org/micro-server-http/v3/handler/health;health_handler";
 
 import "api/annotations.proto";
 import "openapiv3/annotations.proto";
 import "codec/frame.proto";
 
 service HealthService {
+  rpc Healthy(micro.codec.Frame) returns (micro.codec.Frame) {
+		option (micro.openapiv3.openapiv3_operation) = {
+      operation_id: "Healthy";
+      responses: {
+        default: {
+          reference: {
+            _ref: "micro.codec.Frame";
+          };
+        };
+      };
+    };
+		option (micro.api.http) = { 
+      get: "/health";
+      additional_bindings: { get: "/healthz"; }
+    };
+  };
 	rpc Live(micro.codec.Frame) returns (micro.codec.Frame) {
 		option (micro.openapiv3.openapiv3_operation) = {
       operation_id: "Live";
@@ -19,7 +35,10 @@ service HealthService {
         };
       };
     };
-		option (micro.api.http) = { get: "/live"; };
+		option (micro.api.http) = { 
+      get: "/live";
+      additional_bindings: { get: "/livez"; }
+    };
   };
 	rpc Ready(micro.codec.Frame) returns (micro.codec.Frame) {
 		option (micro.openapiv3.openapiv3_operation) = {
@@ -32,7 +51,9 @@ service HealthService {
         };
       };
     };
-		option (micro.api.http) = { get: "/ready"; };
+		option (micro.api.http) = { get: "/ready";
+      additional_bindings: { get: "/readyz"; }
+    };
   };
 	rpc Version(micro.codec.Frame) returns (micro.codec.Frame) {
 		option (micro.openapiv3.openapiv3_operation) = {

handler/health/health_micro.pb.go

@@ -1,47 +1,30 @@
 // Code generated by protoc-gen-go-micro. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-micro v3.10.2
-// - protoc              v3.21.12
-// source: health.proto
+// - protoc-gen-go-micro v3.10.4
+// - protoc              v5.28.3
+// source: health/health.proto
 
-package health
+package health_handler
 
 import (
 	context "context"
 	codec "go.unistack.org/micro-proto/v3/codec"
-	v3 "go.unistack.org/micro-server-http/v3"
+	client "go.unistack.org/micro/v3/client"
 )
 
 var (
 	HealthServiceName = "HealthService"
 )
-var (
-	HealthServiceServerEndpoints = []v3.EndpointMetadata{
-		{
-			Name:   "HealthService.Live",
-			Path:   "/live",
-			Method: "GET",
-			Body:   "",
-			Stream: false,
-		},
-		{
-			Name:   "HealthService.Ready",
-			Path:   "/ready",
-			Method: "GET",
-			Body:   "",
-			Stream: false,
-		},
-		{
-			Name:   "HealthService.Version",
-			Path:   "/version",
-			Method: "GET",
-			Body:   "",
-			Stream: false,
-		},
-	}
-)
+
+type HealthServiceClient interface {
+	Healthy(ctx context.Context, req *codec.Frame, opts ...client.CallOption) (*codec.Frame, error)
+	Live(ctx context.Context, req *codec.Frame, opts ...client.CallOption) (*codec.Frame, error)
+	Ready(ctx context.Context, req *codec.Frame, opts ...client.CallOption) (*codec.Frame, error)
+	Version(ctx context.Context, req *codec.Frame, opts ...client.CallOption) (*codec.Frame, error)
+}
 
 type HealthServiceServer interface {
+	Healthy(ctx context.Context, req *codec.Frame, rsp *codec.Frame) error
 	Live(ctx context.Context, req *codec.Frame, rsp *codec.Frame) error
 	Ready(ctx context.Context, req *codec.Frame, rsp *codec.Frame) error
 	Version(ctx context.Context, req *codec.Frame, rsp *codec.Frame) error

handler/health/health_micro_http.pb.go

@@ -1,20 +1,162 @@
 // Code generated by protoc-gen-go-micro. DO NOT EDIT.
-// protoc-gen-go-micro version: v3.10.2
-// source: health.proto
+// protoc-gen-go-micro version: v3.10.4
+// source: health/health.proto
 
-package health
+package health_handler
 
 import (
 	context "context"
+	v31 "go.unistack.org/micro-client-http/v3"
 	codec "go.unistack.org/micro-proto/v3/codec"
 	v3 "go.unistack.org/micro-server-http/v3"
+	client "go.unistack.org/micro/v3/client"
 	server "go.unistack.org/micro/v3/server"
+	http "net/http"
 )
 
+var (
+	HealthServiceServerEndpoints = []v3.EndpointMetadata{
+		{
+			Name:   "HealthService.Healthy",
+			Path:   "/health",
+			Method: "GET",
+			Body:   "",
+			Stream: false,
+		},
+		{
+			Name:   "HealthService.Healthy",
+			Path:   "/healthz",
+			Method: "GET",
+			Body:   "",
+			Stream: false,
+		},
+		{
+			Name:   "HealthService.Live",
+			Path:   "/live",
+			Method: "GET",
+			Body:   "",
+			Stream: false,
+		},
+		{
+			Name:   "HealthService.Live",
+			Path:   "/livez",
+			Method: "GET",
+			Body:   "",
+			Stream: false,
+		},
+		{
+			Name:   "HealthService.Ready",
+			Path:   "/ready",
+			Method: "GET",
+			Body:   "",
+			Stream: false,
+		},
+		{
+			Name:   "HealthService.Ready",
+			Path:   "/readyz",
+			Method: "GET",
+			Body:   "",
+			Stream: false,
+		},
+		{
+			Name:   "HealthService.Version",
+			Path:   "/version",
+			Method: "GET",
+			Body:   "",
+			Stream: false,
+		},
+	}
+)
+
+type healthServiceClient struct {
+	c    client.Client
+	name string
+}
+
+func NewHealthServiceClient(name string, c client.Client) HealthServiceClient {
+	return &healthServiceClient{c: c, name: name}
+}
+
+func (c *healthServiceClient) Healthy(ctx context.Context, req *codec.Frame, opts ...client.CallOption) (*codec.Frame, error) {
+	errmap := make(map[string]interface{}, 1)
+	errmap["default"] = &codec.Frame{}
+	opts = append(opts,
+		v31.ErrorMap(errmap),
+	)
+	opts = append(opts,
+		v31.Method(http.MethodGet),
+		v31.Path("/health"),
+	)
+	rsp := &codec.Frame{}
+	err := c.c.Call(ctx, c.c.NewRequest(c.name, "HealthService.Healthy", req), rsp, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return rsp, nil
+}
+
+func (c *healthServiceClient) Live(ctx context.Context, req *codec.Frame, opts ...client.CallOption) (*codec.Frame, error) {
+	errmap := make(map[string]interface{}, 1)
+	errmap["default"] = &codec.Frame{}
+	opts = append(opts,
+		v31.ErrorMap(errmap),
+	)
+	opts = append(opts,
+		v31.Method(http.MethodGet),
+		v31.Path("/live"),
+	)
+	rsp := &codec.Frame{}
+	err := c.c.Call(ctx, c.c.NewRequest(c.name, "HealthService.Live", req), rsp, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return rsp, nil
+}
+
+func (c *healthServiceClient) Ready(ctx context.Context, req *codec.Frame, opts ...client.CallOption) (*codec.Frame, error) {
+	errmap := make(map[string]interface{}, 1)
+	errmap["default"] = &codec.Frame{}
+	opts = append(opts,
+		v31.ErrorMap(errmap),
+	)
+	opts = append(opts,
+		v31.Method(http.MethodGet),
+		v31.Path("/ready"),
+	)
+	rsp := &codec.Frame{}
+	err := c.c.Call(ctx, c.c.NewRequest(c.name, "HealthService.Ready", req), rsp, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return rsp, nil
+}
+
+func (c *healthServiceClient) Version(ctx context.Context, req *codec.Frame, opts ...client.CallOption) (*codec.Frame, error) {
+	errmap := make(map[string]interface{}, 1)
+	errmap["default"] = &codec.Frame{}
+	opts = append(opts,
+		v31.ErrorMap(errmap),
+	)
+	opts = append(opts,
+		v31.Method(http.MethodGet),
+		v31.Path("/version"),
+	)
+	rsp := &codec.Frame{}
+	err := c.c.Call(ctx, c.c.NewRequest(c.name, "HealthService.Version", req), rsp, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return rsp, nil
+}
+
 type healthServiceServer struct {
 	HealthServiceServer
 }
 
+func (h *healthServiceServer) Healthy(ctx context.Context, req *codec.Frame, rsp *codec.Frame) error {
+	return h.HealthServiceServer.Healthy(ctx, req, rsp)
+}
+
 func (h *healthServiceServer) Live(ctx context.Context, req *codec.Frame, rsp *codec.Frame) error {
 	return h.HealthServiceServer.Live(ctx, req, rsp)
 }
@@ -29,6 +171,7 @@ func (h *healthServiceServer) Version(ctx context.Context, req *codec.Frame, rsp
 
 func RegisterHealthServiceServer(s server.Server, sh HealthServiceServer, opts ...server.HandlerOption) error {
 	type healthService interface {
+		Healthy(ctx context.Context, req *codec.Frame, rsp *codec.Frame) error
 		Live(ctx context.Context, req *codec.Frame, rsp *codec.Frame) error
 		Ready(ctx context.Context, req *codec.Frame, rsp *codec.Frame) error
 		Version(ctx context.Context, req *codec.Frame, rsp *codec.Frame) error

handler/meter/generate.go

@@ -1,8 +0,0 @@
-package meter
-
-//go:generate sh -c "protoc -I./ -I$(go list -f '{{ .Dir }}' -m go.unistack.org/micro-proto/v3) --go-micro_out='components=micro|http|server',standalone=false,debug=true,paths=source_relative:./ meter.proto"
-
-import (
-	// import required packages
-	_ "go.unistack.org/micro-proto/v3/openapiv3"
-)

handler/meter/meter.go

@@ -1,27 +1,50 @@
-package meter // import "go.unistack.org/micro-server-http/v3/handler/meter"
+package meter_handler
 
 import (
 	"bytes"
+	"compress/gzip"
 	"context"
+	"io"
+	"strings"
+	"sync"
 
 	codecpb "go.unistack.org/micro-proto/v3/codec"
-	"go.unistack.org/micro/v3/errors"
+	"go.unistack.org/micro/v3/logger"
+	"go.unistack.org/micro/v3/metadata"
 	"go.unistack.org/micro/v3/meter"
 )
 
+const (
+	contentEncodingHeader = "Content-Encoding"
+	acceptEncodingHeader  = "Accept-Encoding"
+)
+
+var gzipPool = sync.Pool{
+	New: func() interface{} {
+		return gzip.NewWriter(nil)
+	},
+}
+
+var bufPool = sync.Pool{
+	New: func() interface{} {
+		return bytes.NewBuffer(nil)
+	},
+}
+
 // guard to fail early
 var _ MeterServiceServer = &Handler{}
 
 type Handler struct {
-	opts Options
+	Options Options
 }
 
 type Option func(*Options)
 
 type Options struct {
-	Meter        meter.Meter
-	Name         string
-	MeterOptions []meter.Option
+	Meter           meter.Meter
+	Name            string
+	MeterOptions    []meter.Option
+	DisableCompress bool
 }
 
 func Meter(m meter.Meter) Option {
@@ -36,6 +59,12 @@ func Name(name string) Option {
 	}
 }
 
+func DisableCompress(g bool) Option {
+	return func(o *Options) {
+		o.DisableCompress = g
+	}
+}
+
 func MeterOptions(opts ...meter.Option) Option {
 	return func(o *Options) {
 		o.MeterOptions = append(o.MeterOptions, opts...)
@@ -43,7 +72,7 @@ func MeterOptions(opts ...meter.Option) Option {
 }
 
 func NewOptions(opts ...Option) Options {
-	options := Options{Meter: meter.DefaultMeter}
+	options := Options{Meter: meter.DefaultMeter, DisableCompress: false}
 	for _, o := range opts {
 		o(&options)
 	}
@@ -52,16 +81,52 @@ func NewOptions(opts ...Option) Options {
 
 func NewHandler(opts ...Option) *Handler {
 	options := NewOptions(opts...)
-	return &Handler{opts: options}
+	return &Handler{Options: options}
 }
 
 func (h *Handler) Metrics(ctx context.Context, req *codecpb.Frame, rsp *codecpb.Frame) error {
-	buf := bytes.NewBuffer(nil)
-	if err := h.opts.Meter.Write(buf, h.opts.MeterOptions...); err != nil {
-		return errors.InternalServerError(h.opts.Name, "%v", err)
+	log, ok := logger.FromContext(ctx)
+	if !ok {
+		log = logger.DefaultLogger
+	}
+
+	buf := bufPool.Get().(*bytes.Buffer)
+	defer bufPool.Put(buf)
+	buf.Reset()
+
+	w := io.Writer(buf)
+
+	if md, ok := metadata.FromOutgoingContext(ctx); gzipAccepted(md) && ok && !h.Options.DisableCompress {
+		omd, _ := metadata.FromOutgoingContext(ctx)
+		omd.Set(contentEncodingHeader, "gzip")
+		gz := gzipPool.Get().(*gzip.Writer)
+		defer gzipPool.Put(gz)
+
+		gz.Reset(w)
+		defer gz.Close()
+
+		w = gz
+		gz.Flush()
+	}
+
+	if err := h.Options.Meter.Write(w, h.Options.MeterOptions...); err != nil {
+		log.Error(ctx, "http/meter write failed", err)
+		return nil
 	}
 
 	rsp.Data = buf.Bytes()
 
 	return nil
 }
+
+// gzipAccepted returns whether the client will accept gzip-encoded content.
+func gzipAccepted(md metadata.Metadata) bool {
+	a, ok := md.Get(acceptEncodingHeader)
+	if !ok {
+		return false
+	}
+	if strings.Contains(a, "gzip") {
+		return true
+	}
+	return false
+}

handler/meter/meter.proto

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

handler/meter/meter_micro.pb.go

@@ -1,31 +1,24 @@
 // Code generated by protoc-gen-go-micro. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-micro v3.10.2
-// - protoc              v3.21.12
-// source: meter.proto
+// - protoc-gen-go-micro v3.10.4
+// - protoc              v5.28.3
+// source: meter/meter.proto
 
-package meter
+package meter_handler
 
 import (
 	context "context"
 	codec "go.unistack.org/micro-proto/v3/codec"
-	v3 "go.unistack.org/micro-server-http/v3"
+	client "go.unistack.org/micro/v3/client"
 )
 
 var (
 	MeterServiceName = "MeterService"
 )
-var (
-	MeterServiceServerEndpoints = []v3.EndpointMetadata{
-		{
-			Name:   "MeterService.Metrics",
-			Path:   "/metrics",
-			Method: "GET",
-			Body:   "",
-			Stream: false,
-		},
-	}
-)
+
+type MeterServiceClient interface {
+	Metrics(ctx context.Context, req *codec.Frame, opts ...client.CallOption) (*codec.Frame, error)
+}
 
 type MeterServiceServer interface {
 	Metrics(ctx context.Context, req *codec.Frame, rsp *codec.Frame) error

handler/meter/meter_micro_http.pb.go

@@ -1,16 +1,58 @@
 // Code generated by protoc-gen-go-micro. DO NOT EDIT.
-// protoc-gen-go-micro version: v3.10.2
-// source: meter.proto
+// protoc-gen-go-micro version: v3.10.4
+// source: meter/meter.proto
 
-package meter
+package meter_handler
 
 import (
 	context "context"
+	v31 "go.unistack.org/micro-client-http/v3"
 	codec "go.unistack.org/micro-proto/v3/codec"
 	v3 "go.unistack.org/micro-server-http/v3"
+	client "go.unistack.org/micro/v3/client"
 	server "go.unistack.org/micro/v3/server"
+	http "net/http"
 )
 
+var (
+	MeterServiceServerEndpoints = []v3.EndpointMetadata{
+		{
+			Name:   "MeterService.Metrics",
+			Path:   "/metrics",
+			Method: "GET",
+			Body:   "",
+			Stream: false,
+		},
+	}
+)
+
+type meterServiceClient struct {
+	c    client.Client
+	name string
+}
+
+func NewMeterServiceClient(name string, c client.Client) MeterServiceClient {
+	return &meterServiceClient{c: c, name: name}
+}
+
+func (c *meterServiceClient) Metrics(ctx context.Context, req *codec.Frame, opts ...client.CallOption) (*codec.Frame, error) {
+	errmap := make(map[string]interface{}, 1)
+	errmap["default"] = &codec.Frame{}
+	opts = append(opts,
+		v31.ErrorMap(errmap),
+	)
+	opts = append(opts,
+		v31.Method(http.MethodGet),
+		v31.Path("/metrics"),
+	)
+	rsp := &codec.Frame{}
+	err := c.c.Call(ctx, c.c.NewRequest(c.name, "MeterService.Metrics", req), rsp, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return rsp, nil
+}
+
 type meterServiceServer struct {
 	MeterServiceServer
 }

handler/pprof/pprof.go

@@ -0,0 +1,46 @@
+package pprof_handler
+
+import (
+	"expvar"
+	"net/http"
+	"net/http/pprof"
+	"path"
+	"strings"
+)
+
+func NewHandler(prefixPath string, initFuncs ...func()) http.HandlerFunc {
+	for _, fn := range initFuncs {
+		fn()
+	}
+
+	return func(w http.ResponseWriter, r *http.Request) {
+		switch {
+		case strings.EqualFold(r.RequestURI, prefixPath) && r.RequestURI[len(r.RequestURI)-1] != '/':
+			http.Redirect(w, r, r.RequestURI+"/", http.StatusMovedPermanently)
+		case strings.HasPrefix(r.RequestURI, path.Join(prefixPath, "cmdline")):
+			pprof.Cmdline(w, r)
+		case strings.HasPrefix(r.RequestURI, path.Join(prefixPath, "profile")):
+			pprof.Profile(w, r)
+		case strings.HasPrefix(r.RequestURI, path.Join(prefixPath, "symbol")):
+			pprof.Symbol(w, r)
+		case strings.HasPrefix(r.RequestURI, path.Join(prefixPath, "trace")):
+			pprof.Trace(w, r)
+		case strings.HasPrefix(r.RequestURI, path.Join(prefixPath, "goroutine")):
+			pprof.Handler("goroutine").ServeHTTP(w, r)
+		case strings.HasPrefix(r.RequestURI, path.Join(prefixPath, "threadcreate")):
+			pprof.Handler("threadcreate").ServeHTTP(w, r)
+		case strings.HasPrefix(r.RequestURI, path.Join(prefixPath, "mutex")):
+			pprof.Handler("mutex").ServeHTTP(w, r)
+		case strings.HasPrefix(r.RequestURI, path.Join(prefixPath, "heap")):
+			pprof.Handler("heap").ServeHTTP(w, r)
+		case strings.HasPrefix(r.RequestURI, path.Join(prefixPath, "block")):
+			pprof.Handler("block").ServeHTTP(w, r)
+		case strings.HasPrefix(r.RequestURI, path.Join(prefixPath, "allocs")):
+			pprof.Handler("allocs").ServeHTTP(w, r)
+		case strings.HasPrefix(r.RequestURI, path.Join(prefixPath, "vars")):
+			expvar.Handler().ServeHTTP(w, r)
+		default:
+			pprof.Index(w, r)
+		}
+	}
+}

handler/spa/spa.go

@@ -0,0 +1,19 @@
+package spa
+
+import (
+	"io/fs"
+	"net/http"
+	"strings"
+)
+
+// Handler serve files from dir and redirect to index if file not exists
+var Handler = func(prefix string, dir fs.FS) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		f := http.StripPrefix(prefix, http.FileServer(http.FS(dir)))
+		if _, err := fs.Stat(dir, strings.TrimPrefix(r.RequestURI, prefix)); err != nil {
+			r.RequestURI = prefix
+			r.URL.Path = prefix
+		}
+		f.ServeHTTP(w, r)
+	}
+}

handler/swagger-ui/index.css

@@ -0,0 +1,16 @@
+html {
+    box-sizing: border-box;
+    overflow: -moz-scrollbars-vertical;
+    overflow-y: scroll;
+}
+
+*,
+*:before,
+*:after {
+    box-sizing: inherit;
+}
+
+body {
+    margin: 0;
+    background: #fafafa;
+}

handler/swagger-ui/index.html

@@ -0,0 +1,19 @@
+<!-- HTML for static distribution bundle build -->
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8">
+    <title>Swagger UI</title>
+    <link rel="stylesheet" type="text/css" href="./swagger-ui.css" />
+    <link rel="stylesheet" type="text/css" href="index.css" />
+    <link rel="icon" type="image/png" href="./favicon-32x32.png" sizes="32x32" />
+    <link rel="icon" type="image/png" href="./favicon-16x16.png" sizes="16x16" />
+  </head>
+
+  <body>
+    <div id="swagger-ui"></div>
+    <script src="./swagger-ui-bundle.js" charset="UTF-8"> </script>
+    <script src="./swagger-ui-standalone-preset.js" charset="UTF-8"> </script>
+    <script src="./swagger-initializer.js" charset="UTF-8"> </script>
+  </body>
+</html>

handler/swagger-ui/oauth2-redirect.html

@@ -0,0 +1,79 @@
+<!doctype html>
+<html lang="en-US">
+<head>
+    <title>Swagger UI: OAuth2 Redirect</title>
+</head>
+<body>
+<script>
+    'use strict';
+    function run () {
+        var oauth2 = window.opener.swaggerUIRedirectOauth2;
+        var sentState = oauth2.state;
+        var redirectUrl = oauth2.redirectUrl;
+        var isValid, qp, arr;
+
+        if (/code|token|error/.test(window.location.hash)) {
+            qp = window.location.hash.substring(1).replace('?', '&');
+        } else {
+            qp = location.search.substring(1);
+        }
+
+        arr = qp.split("&");
+        arr.forEach(function (v,i,_arr) { _arr[i] = '"' + v.replace('=', '":"') + '"';});
+        qp = qp ? JSON.parse('{' + arr.join() + '}',
+                function (key, value) {
+                    return key === "" ? value : decodeURIComponent(value);
+                }
+        ) : {};
+
+        isValid = qp.state === sentState;
+
+        if ((
+          oauth2.auth.schema.get("flow") === "accessCode" ||
+          oauth2.auth.schema.get("flow") === "authorizationCode" ||
+          oauth2.auth.schema.get("flow") === "authorization_code"
+        ) && !oauth2.auth.code) {
+            if (!isValid) {
+                oauth2.errCb({
+                    authId: oauth2.auth.name,
+                    source: "auth",
+                    level: "warning",
+                    message: "Authorization may be unsafe, passed state was changed in server. The passed state wasn't returned from auth server."
+                });
+            }
+
+            if (qp.code) {
+                delete oauth2.state;
+                oauth2.auth.code = qp.code;
+                oauth2.callback({auth: oauth2.auth, redirectUrl: redirectUrl});
+            } else {
+                let oauthErrorMsg;
+                if (qp.error) {
+                    oauthErrorMsg = "["+qp.error+"]: " +
+                        (qp.error_description ? qp.error_description+ ". " : "no accessCode received from the server. ") +
+                        (qp.error_uri ? "More info: "+qp.error_uri : "");
+                }
+
+                oauth2.errCb({
+                    authId: oauth2.auth.name,
+                    source: "auth",
+                    level: "error",
+                    message: oauthErrorMsg || "[Authorization failed]: no accessCode received from the server."
+                });
+            }
+        } else {
+            oauth2.callback({auth: oauth2.auth, token: qp, isValid: isValid, redirectUrl: redirectUrl});
+        }
+        window.close();
+    }
+
+    if (document.readyState !== 'loading') {
+        run();
+    } else {
+        document.addEventListener('DOMContentLoaded', function () {
+            run();
+        });
+    }
+</script>
+</body>
+</html>

handler/swagger-ui/swaggerui.go

@@ -0,0 +1,142 @@
+package swaggerui_handler
+
+import (
+	"embed"
+	"html/template"
+	"net/http"
+	"path"
+	"reflect"
+)
+
+//go:embed *.js *.css *.html *.png
+var assets embed.FS
+
+var (
+	Handler = func(prefix string) http.HandlerFunc {
+		return func(w http.ResponseWriter, r *http.Request) {
+			if r.Method != http.MethodGet || path.Base(r.URL.Path) != "swagger-initializer.js" {
+				http.StripPrefix(prefix, http.FileServer(http.FS(assets))).ServeHTTP(w, r)
+				return
+			}
+			tpl := template.New("swagger-initializer.js").Funcs(TemplateFuncs)
+			ptpl, err := tpl.Parse(Template)
+			if err != nil {
+				w.WriteHeader(http.StatusInternalServerError)
+				_, _ = w.Write([]byte(err.Error()))
+				return
+			}
+			if err := ptpl.Execute(w, Config); err != nil {
+				w.WriteHeader(http.StatusInternalServerError)
+				_, _ = w.Write([]byte(err.Error()))
+				return
+			}
+		}
+	}
+	TemplateFuncs = template.FuncMap{
+		"isInt": func(i interface{}) bool {
+			v := reflect.ValueOf(i)
+			switch v.Kind() {
+			case reflect.Int, reflect.Int8, reflect.Int32, reflect.Int64, reflect.Uint, reflect.Uint8, reflect.Uint32, reflect.Uint64, reflect.Float32, reflect.Float64:
+				return true
+			default:
+				return false
+			}
+		},
+		"isBool": func(i interface{}) bool {
+			v := reflect.ValueOf(i)
+			switch v.Kind() {
+			case reflect.Bool:
+				return true
+			default:
+				return false
+			}
+		},
+		"isString": func(i interface{}) bool {
+			v := reflect.ValueOf(i)
+			switch v.Kind() {
+			case reflect.String:
+				return true
+			default:
+				return false
+			}
+		},
+		"isSlice": func(i interface{}) bool {
+			v := reflect.ValueOf(i)
+			switch v.Kind() {
+			case reflect.Slice:
+				return true
+			default:
+				return false
+			}
+		},
+		"isMap": func(i interface{}) bool {
+			v := reflect.ValueOf(i)
+			switch v.Kind() {
+			case reflect.Map:
+				return true
+			default:
+				return false
+			}
+		},
+	}
+	Template = `
+	window.onload = function() {
+		//<editor-fold desc="Changeable Configuration Block">
+	
+		window.ui = SwaggerUIBundle({
+			{{- range $k, $v := . }}
+			{{- if (eq (printf "%s" $v) "") -}}
+			{{- continue -}}
+			{{ end }}
+			{{ $k }}: {{ if isBool $v -}}
+			{{- $v -}},
+			{{- else if isInt $v -}}
+      {{- $v -}},
+			{{- else if isString $v -}}
+			"{{- $v -}}",
+			{{- else if and (isSlice $v) (or (eq (printf "%s" $k) "presets") (eq (printf "%s" $k) "plugins")) -}}
+			[
+			{{- range $v }}
+				{{ . }},
+			{{- end }}
+			],
+			{{- end -}} 
+			{{ end }}
+		});
+	
+		//</editor-fold>
+	};`
+	Config = map[string]interface{}{
+		"configUrl": "",
+		"dom_id":    "#swagger-ui",
+		/*
+				"domNode":     "",
+			  "spec":        "",
+				"urls": []interface{}{
+					map[string]interface{}{
+							"url":  "",
+							"name": "",
+						},
+					},
+				},
+		*/
+		"url":                      "https://petstore.swagger.io/v2/swagger.json",
+		"deepLinking":              true,
+		"displayOperationId":       false,
+		"defaultModelsExpandDepth": 1,
+		"defaultModelExpandDepth":  1,
+		"displayRequestDuration":   true,
+		"filter":                   true,
+		"operationsSorter":         "alpha",
+		"showExtensions":           true,
+		"tryItOutEnabled":          true,
+		"presets": []string{
+			"SwaggerUIBundle.presets.apis",
+			"SwaggerUIStandalonePreset",
+		},
+		"plugins": []string{
+			"SwaggerUIBundle.plugins.DownloadUrl",
+		},
+		"layout": "StandaloneLayout",
+	}
+)

handler/swagger-ui/swaggerui_test.go

@@ -0,0 +1,15 @@
+package swaggerui_handler
+
+import (
+	"net/http"
+	"testing"
+)
+
+func TestTemplate(t *testing.T) {
+	t.Skip()
+	h := http.NewServeMux()
+	h.HandleFunc("/", Handler(""))
+	if err := http.ListenAndServe(":8080", h); err != nil {
+		t.Fatal(err)
+	}
+}

handler/swagger/swagger.go

@@ -0,0 +1,61 @@
+package swagger_handler
+
+import (
+	"io/fs"
+	"net/http"
+
+	yamlcodec "go.unistack.org/micro-codec-yaml/v3"
+	rutil "go.unistack.org/micro/v3/util/reflect"
+)
+
+// Handler append to generated swagger data from dst map[string]interface{}
+var Handler = func(dst map[string]interface{}, fsys fs.FS) http.HandlerFunc {
+	c := yamlcodec.NewCodec()
+	return func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodGet {
+			w.WriteHeader(http.StatusNotFound)
+			return
+		}
+
+		path := r.URL.Path
+		if len(path) > 1 && path[0] == '/' {
+			path = path[1:]
+		}
+
+		buf, err := fs.ReadFile(fsys, path)
+		if err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			_, _ = w.Write([]byte(err.Error()))
+			return
+		}
+
+		if dst == nil {
+			w.WriteHeader(http.StatusOK)
+			_, _ = w.Write(buf)
+			return
+		}
+
+		var src interface{}
+
+		if err = c.Unmarshal(buf, src); err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			_, _ = w.Write([]byte(err.Error()))
+			return
+		}
+
+		if err = rutil.Merge(src, dst); err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			_, _ = w.Write([]byte(err.Error()))
+			return
+		}
+
+		if buf, err = c.Marshal(src); err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			_, _ = w.Write([]byte(err.Error()))
+			return
+		}
+
+		w.WriteHeader(http.StatusOK)
+		_, _ = w.Write(buf)
+	}
+}

http.go

@@ -12,6 +12,7 @@ import (
 	"sort"
 	"strings"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"go.unistack.org/micro/v3/broker"
@@ -23,9 +24,9 @@ import (
 	"golang.org/x/net/netutil"
 )
 
-var _ server.Server = &httpServer{}
+var _ server.Server = (*Server)(nil)
 
-type httpServer struct {
+type Server struct {
 	hd           server.Handler
 	rsvc         *register.Service
 	handlers     map[string]server.Handler
@@ -34,13 +35,16 @@ type httpServer struct {
 	errorHandler func(context.Context, server.Handler, http.ResponseWriter, *http.Request, error, int)
 	pathHandlers *rhttp.Trie
 	opts         server.Options
+	stateLive    *atomic.Uint32
+	stateReady   *atomic.Uint32
+	stateHealth  *atomic.Uint32
 	registerRPC  bool
 	sync.RWMutex
 	registered bool
 	init       bool
 }
 
-func (h *httpServer) newCodec(ct string) (codec.Codec, error) {
+func (h *Server) newCodec(ct string) (codec.Codec, error) {
 	if idx := strings.IndexRune(ct, ';'); idx >= 0 {
 		ct = ct[:idx]
 	}
@@ -53,14 +57,14 @@ func (h *httpServer) newCodec(ct string) (codec.Codec, error) {
 	return nil, codec.ErrUnknownContentType
 }
 
-func (h *httpServer) Options() server.Options {
+func (h *Server) Options() server.Options {
 	h.Lock()
 	opts := h.opts
 	h.Unlock()
 	return opts
 }
 
-func (h *httpServer) Init(opts ...server.Option) error {
+func (h *Server) Init(opts ...server.Option) error {
 	if len(opts) == 0 && h.init {
 		return nil
 	}
@@ -117,10 +121,7 @@ func (h *httpServer) Init(opts ...server.Option) error {
 		h.RUnlock()
 		return err
 	}
-	if err := h.opts.Transport.Init(); err != nil {
-		h.RUnlock()
-		return err
-	}
+
 	h.RUnlock()
 
 	h.Lock()
@@ -130,7 +131,7 @@ func (h *httpServer) Init(opts ...server.Option) error {
 	return nil
 }
 
-func (h *httpServer) Handle(handler server.Handler) error {
+func (h *Server) Handle(handler server.Handler) error {
 	// passed unknown handler
 	hdlr, ok := handler.(*httpHandler)
 	if !ok {
@@ -159,7 +160,7 @@ func (h *httpServer) Handle(handler server.Handler) error {
 	return nil
 }
 
-func (h *httpServer) NewHandler(handler interface{}, opts ...server.HandlerOption) server.Handler {
+func (h *Server) NewHandler(handler interface{}, opts ...server.HandlerOption) server.Handler {
 	options := server.NewHandlerOptions(opts...)
 
 	eps := make([]*register.Endpoint, 0, len(options.Metadata))
@@ -191,6 +192,11 @@ func (h *httpServer) NewHandler(handler interface{}, opts ...server.HandlerOptio
 		}
 	*/
 
+	registerCORS := false
+	if v, ok := options.Context.Value(registerCORSHandlerKey{}).(bool); ok && v {
+		registerCORS = true
+	}
+
 	for hn, md := range options.Metadata {
 		var method reflect.Method
 		mname := hn[strings.Index(hn, ".")+1:]
@@ -204,16 +210,16 @@ func (h *httpServer) NewHandler(handler interface{}, opts ...server.HandlerOptio
 		}
 
 		if method.Name == "" && h.opts.Logger.V(logger.ErrorLevel) {
-			h.opts.Logger.Errorf(h.opts.Context, "nil method for %s", mname)
+			h.opts.Logger.Error(h.opts.Context, fmt.Sprintf("nil method for %s", mname))
 			continue
 		}
 
 		mtype, err := prepareEndpoint(method)
 		if err != nil && h.opts.Logger.V(logger.ErrorLevel) {
-			h.opts.Logger.Errorf(h.opts.Context, "%v", err)
+			h.opts.Logger.Error(h.opts.Context, "endpoint error", err)
 			continue
 		} else if mtype == nil {
-			h.opts.Logger.Errorf(h.opts.Context, "nil mtype for %s", mname)
+			h.opts.Logger.Error(h.opts.Context, fmt.Sprintf("nil mtype for %s", mname))
 			continue
 		}
 
@@ -223,14 +229,23 @@ func (h *httpServer) NewHandler(handler interface{}, opts ...server.HandlerOptio
 		pth := &patHandler{mtype: mtype, name: name, rcvr: rcvr}
 		hdlr.name = name
 
-		if err := hdlr.handlers.Insert([]string{md["Method"]}, md["Path"], pth); err != nil {
-			h.opts.Logger.Errorf(h.opts.Context, "cant add handler for %s %s", md["Method"], md["Path"])
+		methods := []string{md["Method"]}
+		if registerCORS {
+			methods = append(methods, http.MethodOptions)
+		}
+
+		if err := hdlr.handlers.Insert(methods, md["Path"], pth); err != nil {
+			h.opts.Logger.Error(h.opts.Context, fmt.Sprintf("cant add handler for %v %s", methods, md["Path"]))
 		}
 
 		if h.registerRPC {
-			h.opts.Logger.Infof(h.opts.Context, "register rpc handler for http.MethodPost %s /%s", hn, hn)
-			if err := hdlr.handlers.Insert([]string{http.MethodPost}, "/"+hn, pth); err != nil {
-				h.opts.Logger.Errorf(h.opts.Context, "cant add rpc handler for http.MethodPost %s /%s", hn, hn)
+			methods := []string{http.MethodPost}
+			if registerCORS {
+				methods = append(methods, http.MethodOptions)
+			}
+
+			if err := hdlr.handlers.Insert(methods, "/"+hn, pth); err != nil {
+				h.opts.Logger.Error(h.opts.Context, fmt.Sprintf("cant add rpc handler for http.MethodPost %s /%s", hn, hn))
 			}
 		}
 	}
@@ -254,16 +269,16 @@ func (h *httpServer) NewHandler(handler interface{}, opts ...server.HandlerOptio
 		}
 
 		if method.Name == "" && h.opts.Logger.V(logger.ErrorLevel) {
-			h.opts.Logger.Errorf(h.opts.Context, "nil method for %s", mname)
+			h.opts.Logger.Error(h.opts.Context, fmt.Sprintf("nil method for %s", mname))
 			continue
 		}
 
 		mtype, err := prepareEndpoint(method)
 		if err != nil && h.opts.Logger.V(logger.ErrorLevel) {
-			h.opts.Logger.Errorf(h.opts.Context, "%v", err)
+			h.opts.Logger.Error(h.opts.Context, "prepare endpoint error", err)
 			continue
 		} else if mtype == nil {
-			h.opts.Logger.Errorf(h.opts.Context, "nil mtype for %s", mname)
+			h.opts.Logger.Error(h.opts.Context, fmt.Sprintf("nil mtype for %s", mname))
 			continue
 		}
 
@@ -273,14 +288,24 @@ func (h *httpServer) NewHandler(handler interface{}, opts ...server.HandlerOptio
 		pth := &patHandler{mtype: mtype, name: name, rcvr: rcvr}
 		hdlr.name = name
 
-		if err := hdlr.handlers.Insert([]string{md.Method}, md.Path, pth); err != nil {
-			h.opts.Logger.Errorf(h.opts.Context, "cant add handler for %s %s", md.Method, md.Path)
+		methods := []string{md.Method}
+		if registerCORS {
+			methods = append(methods, http.MethodOptions)
+		}
+
+		if err := hdlr.handlers.Insert(methods, md.Path, pth); err != nil {
+			h.opts.Logger.Error(h.opts.Context, fmt.Sprintf("cant add handler for %s %s", md.Method, md.Path))
 		}
 
 		if h.registerRPC {
-			h.opts.Logger.Infof(h.opts.Context, "register rpc handler for http.MethodPost %s /%s", hn, hn)
-			if err := hdlr.handlers.Insert([]string{http.MethodPost}, "/"+hn, pth); err != nil {
-				h.opts.Logger.Errorf(h.opts.Context, "cant add rpc handler for http.MethodPost %s /%s", hn, hn)
+			methods := []string{http.MethodPost}
+			if registerCORS {
+				methods = append(methods, http.MethodOptions)
+			}
+
+			h.opts.Logger.Info(h.opts.Context, fmt.Sprintf("register rpc handler for http.MethodPost %s /%s", hn, hn))
+			if err := hdlr.handlers.Insert(methods, "/"+hn, pth); err != nil {
+				h.opts.Logger.Error(h.opts.Context, fmt.Sprintf("cant add rpc handler for http.MethodPost %s /%s", hn, hn))
 			}
 		}
 	}
@@ -288,11 +313,11 @@ func (h *httpServer) NewHandler(handler interface{}, opts ...server.HandlerOptio
 	return hdlr
 }
 
-func (h *httpServer) NewSubscriber(topic string, handler interface{}, opts ...server.SubscriberOption) server.Subscriber {
+func (h *Server) NewSubscriber(topic string, handler interface{}, opts ...server.SubscriberOption) server.Subscriber {
 	return newSubscriber(topic, handler, opts...)
 }
 
-func (h *httpServer) Subscribe(sb server.Subscriber) error {
+func (h *Server) Subscribe(sb server.Subscriber) error {
 	sub, ok := sb.(*httpSubscriber)
 	if !ok {
 		return fmt.Errorf("invalid subscriber: expected *httpSubscriber")
@@ -317,7 +342,7 @@ func (h *httpServer) Subscribe(sb server.Subscriber) error {
 	return nil
 }
 
-func (h *httpServer) Register() error {
+func (h *Server) Register() error {
 	var eps []*register.Endpoint
 	h.RLock()
 	for _, hdlr := range h.handlers {
@@ -363,7 +388,7 @@ func (h *httpServer) 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.Info(config.Context, fmt.Sprintf("Register [%s] Registering node: %s", config.Register.String(), service.Nodes[0].ID))
 		}
 	}
 
@@ -378,6 +403,17 @@ func (h *httpServer) Register() error {
 	}
 
 	h.Lock()
+
+	h.registered = true
+	h.rsvc = service
+	h.Unlock()
+
+	return nil
+}
+
+func (h *Server) subscribe() error {
+	config := h.opts
+
 	for sb := range h.subscribers {
 		handler := h.createSubHandler(sb, config)
 		var opts []broker.SubscribeOption
@@ -401,14 +437,10 @@ func (h *httpServer) Register() error {
 		h.subscribers[sb] = []broker.Subscriber{sub}
 	}
 
-	h.registered = true
-	h.rsvc = service
-	h.Unlock()
-
 	return nil
 }
 
-func (h *httpServer) Deregister() error {
+func (h *Server) Deregister() error {
 	h.RLock()
 	config := h.opts
 	h.RUnlock()
@@ -419,7 +451,7 @@ func (h *httpServer) Deregister() error {
 	}
 
 	if config.Logger.V(logger.InfoLevel) {
-		config.Logger.Infof(config.Context, "Deregistering node: %s", service.Nodes[0].ID)
+		config.Logger.Info(config.Context, "Deregistering node: "+service.Nodes[0].ID)
 	}
 
 	if err := server.DefaultDeregisterFunc(service, config); err != nil {
@@ -443,10 +475,10 @@ func (h *httpServer) Deregister() error {
 		}
 
 		for _, sub := range subs {
-			config.Logger.Infof(config.Context, "Unsubscribing from topic: %s", sub.Topic())
+			config.Logger.Info(config.Context, "Unsubscribing from topic: "+sub.Topic())
 			if err := sub.Unsubscribe(subCtx); err != nil {
 				h.Unlock()
-				config.Logger.Errorf(config.Context, "failed to unsubscribe topic: %s, error: %v", sb.Topic(), err)
+				config.Logger.Error(config.Context, fmt.Sprintf("failed to unsubscribe topic: %s, error", sb.Topic()), err)
 				return err
 			}
 		}
@@ -456,7 +488,7 @@ func (h *httpServer) Deregister() error {
 	return nil
 }
 
-func (h *httpServer) Start() error {
+func (h *Server) Start() error {
 	h.RLock()
 	config := h.opts
 	h.RUnlock()
@@ -486,7 +518,7 @@ func (h *httpServer) Start() error {
 	}
 
 	if config.Logger.V(logger.InfoLevel) {
-		config.Logger.Infof(config.Context, "Listening on %s", ts.Addr().String())
+		config.Logger.Info(config.Context, "Listening on "+ts.Addr().String())
 	}
 
 	h.Lock()
@@ -494,7 +526,6 @@ func (h *httpServer) Start() error {
 	h.Unlock()
 
 	var handler http.Handler
-	var srvFunc func(net.Listener) error
 
 	// nolint: nestif
 	if h.opts.Context != nil {
@@ -531,7 +562,7 @@ func (h *httpServer) Start() error {
 
 	if err := config.RegisterCheck(h.opts.Context); err != nil {
 		if config.Logger.V(logger.ErrorLevel) {
-			config.Logger.Errorf(config.Context, "Server %s-%s register check error: %s", config.Name, config.ID, err)
+			config.Logger.Error(config.Context, fmt.Sprintf("Server %s-%s register check error", config.Name, config.ID), err)
 		}
 	} else {
 		if err = h.Register(); err != nil {
@@ -539,8 +570,13 @@ func (h *httpServer) Start() error {
 		}
 	}
 
+	if err := h.subscribe(); err != nil {
+		return err
+	}
+
 	fn := handler
 
+	var hs *http.Server
 	if h.opts.Context != nil {
 		if mwf, ok := h.opts.Context.Value(middlewareKey{}).([]func(http.Handler) http.Handler); ok && len(mwf) > 0 {
 			// wrap the handler func
@@ -548,25 +584,22 @@ func (h *httpServer) Start() error {
 				fn = mwf[i-1](fn)
 			}
 		}
-		if hs, ok := h.opts.Context.Value(serverKey{}).(*http.Server); ok && hs != nil {
+		var ok bool
+		if hs, ok = h.opts.Context.Value(serverKey{}).(*http.Server); ok && hs != nil {
 			hs.Handler = fn
-			srvFunc = hs.Serve
+		} else {
+			hs = &http.Server{Handler: fn}
 		}
 	}
 
-	if srvFunc != nil {
-		go func() {
-			if cerr := srvFunc(ts); cerr != nil && !errors.Is(cerr, net.ErrClosed) {
-				h.opts.Logger.Error(h.opts.Context, cerr)
-			}
-		}()
-	} else {
-		go func() {
-			if cerr := http.Serve(ts, fn); cerr != nil && !errors.Is(cerr, net.ErrClosed) {
-				h.opts.Logger.Error(h.opts.Context, cerr)
-			}
-		}()
-	}
+	go func() {
+		if cerr := hs.Serve(ts); cerr != nil && !errors.Is(cerr, http.ErrServerClosed) {
+			h.opts.Logger.Error(h.opts.Context, "serve error", cerr)
+		}
+		h.stateLive.Store(0)
+		h.stateReady.Store(0)
+		h.stateHealth.Store(0)
+	}()
 
 	go func() {
 		t := new(time.Ticker)
@@ -592,28 +625,28 @@ func (h *httpServer) Start() error {
 				// 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.Error(config.Context, fmt.Sprintf("Server %s-%s register check error, deregister it", config.Name, config.ID), rerr)
 					}
 					// deregister self in case of error
 					if err := h.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.Error(config.Context, fmt.Sprintf("Server %s-%s deregister error", 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.Error(config.Context, fmt.Sprintf("Server %s-%s register check error", config.Name, config.ID), rerr)
 					}
 					continue
 				}
 				if err := h.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.Error(config.Context, fmt.Sprintf("Server %s-%s register error", config.Name, config.ID), err)
 					}
 				}
 
 				if err := h.Register(); err != nil {
-					config.Logger.Errorf(config.Context, "Server register error: %s", err)
+					config.Logger.Error(config.Context, "Server register error", err)
 				}
 			// wait for exit
 			case ch = <-h.exit:
@@ -623,40 +656,67 @@ func (h *httpServer) Start() error {
 
 		// deregister
 		if err := h.Deregister(); err != nil {
-			config.Logger.Errorf(config.Context, "Server deregister error: %s", err)
+			config.Logger.Error(config.Context, "Server deregister error", err)
 		}
 
 		if err := config.Broker.Disconnect(config.Context); err != nil {
-			config.Logger.Errorf(config.Context, "Broker disconnect error: %s", err)
+			config.Logger.Error(config.Context, "Broker disconnect error", err)
 		}
 
-		ch <- ts.Close()
+		ctx, cancel := context.WithTimeout(context.Background(), h.opts.GracefulTimeout)
+		defer cancel()
+
+		err := hs.Shutdown(ctx)
+		if err != nil {
+			err = hs.Close()
+		}
+
+		ch <- err
 	}()
 
+	h.stateLive.Store(1)
+	h.stateReady.Store(1)
+	h.stateHealth.Store(1)
+
 	return nil
 }
 
-func (h *httpServer) Stop() error {
+func (h *Server) Stop() error {
 	ch := make(chan error)
 	h.exit <- ch
 	return <-ch
 }
 
-func (h *httpServer) String() string {
+func (h *Server) String() string {
 	return "http"
 }
 
-func (h *httpServer) Name() string {
+func (h *Server) Name() string {
 	return h.opts.Name
 }
 
-func NewServer(opts ...server.Option) *httpServer {
+func (h *Server) Live() bool {
+	return h.stateLive.Load() == 1
+}
+
+func (h *Server) Ready() bool {
+	return h.stateReady.Load() == 1
+}
+
+func (h *Server) Health() bool {
+	return h.stateHealth.Load() == 1
+}
+
+func NewServer(opts ...server.Option) *Server {
 	options := server.NewOptions(opts...)
 	eh := DefaultErrorHandler
 	if v, ok := options.Context.Value(errorHandlerKey{}).(errorHandler); ok && v != nil {
 		eh = v
 	}
-	return &httpServer{
+	return &Server{
+		stateLive:    &atomic.Uint32{},
+		stateReady:   &atomic.Uint32{},
+		stateHealth:  &atomic.Uint32{},
 		opts:         options,
 		exit:         make(chan chan error),
 		subscribers:  make(map[*httpSubscriber][]broker.Subscriber),

message.go

@@ -11,7 +11,6 @@ type httpMessage struct {
 	header      metadata.Metadata
 	topic       string
 	contentType string
-	body        []byte
 }
 
 func (r *httpMessage) Topic() string {

options.go

@@ -69,7 +69,7 @@ func getRspHeader(ctx context.Context) http.Header {
 
 // GetRspCode used internally by generated http server handler
 func GetRspCode(ctx context.Context) int {
-	var code int
+	code := int(200)
 	if rsp, ok := ctx.Value(rspCodeKey{}).(*rspCodeVal); ok {
 		code = rsp.code
 	}
@@ -85,8 +85,8 @@ func Middleware(mw ...func(http.Handler) http.Handler) server.Option {
 
 type serverKey struct{}
 
-// Server provide ability to pass *http.Server
-func Server(hs *http.Server) server.Option {
+// HTTPServer provide ability to pass *http.Server
+func HTTPServer(hs *http.Server) server.Option {
 	return server.SetOption(serverKey{}, hs)
 }
 
@@ -133,6 +133,13 @@ func RegisterRPCHandler(b bool) server.Option {
 	return server.SetOption(registerRPCHandlerKey{}, b)
 }
 
+type registerCORSHandlerKey struct{}
+
+// RegisterCORSHandler registers cors endpoints with /ServiceName.ServiceEndpoint method POPTIONSOST
+func RegisterCORSHandler(b bool) server.HandlerOption {
+	return server.SetHandlerOption(registerCORSHandlerKey{}, b)
+}
+
 type handlerEndpointsKey struct{}
 
 type EndpointMetadata struct {

request.go

@@ -58,11 +58,7 @@ func (r *rpcRequest) Header() metadata.Metadata {
 }
 
 func (r *rpcRequest) Read() ([]byte, error) {
-	f := &codec.Frame{}
-	if err := r.codec.ReadBody(r.rw, f); err != nil {
-		return nil, err
-	}
-	return f.Data, nil
+	return nil, nil
 }
 
 func (r *rpcRequest) Stream() bool {

subscriber.go

@@ -1,15 +1,14 @@
 package http
 
 import (
-	"bytes"
 	"context"
 	"fmt"
 	"reflect"
 	"strings"
 
 	"go.unistack.org/micro/v3/broker"
-	"go.unistack.org/micro/v3/codec"
 	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/options"
 	"go.unistack.org/micro/v3/register"
 	"go.unistack.org/micro/v3/server"
 )
@@ -101,7 +100,7 @@ func newSubscriber(topic string, sub interface{}, opts ...server.SubscriberOptio
 	}
 }
 
-func (s *httpServer) createSubHandler(sb *httpSubscriber, opts server.Options) broker.Handler {
+func (s *Server) createSubHandler(sb *httpSubscriber, opts server.Options) broker.Handler {
 	return func(p broker.Event) error {
 		msg := p.Message()
 		ct := msg.Header["Content-Type"]
@@ -111,7 +110,6 @@ func (s *httpServer) createSubHandler(sb *httpSubscriber, opts server.Options) b
 		}
 
 		hdr := metadata.Copy(msg.Header)
-		delete(hdr, "Content-Type")
 		ctx := metadata.NewIncomingContext(context.Background(), hdr)
 
 		results := make(chan error, len(sb.handlers))
@@ -132,13 +130,7 @@ func (s *httpServer) createSubHandler(sb *httpSubscriber, opts server.Options) b
 				req = req.Elem()
 			}
 
-			buf := bytes.NewBuffer(msg.Body)
-
-			if err := cf.ReadHeader(buf, &codec.Message{}, codec.Event); err != nil {
-				return err
-			}
-
-			if err := cf.ReadBody(buf, req.Interface()); err != nil {
+			if err := cf.Unmarshal(msg.Body, req.Interface()); err != nil {
 				return err
 			}
 
@@ -160,9 +152,11 @@ func (s *httpServer) createSubHandler(sb *httpSubscriber, opts server.Options) b
 				return nil
 			}
 
-			for i := len(opts.SubWrappers); i > 0; i-- {
-				fn = opts.SubWrappers[i-1](fn)
-			}
+			opts.Hooks.EachNext(func(hook options.Hook) {
+				if h, ok := hook.(server.HookSubHandler); ok {
+					fn = h(fn)
+				}
+			})
 
 			go func() {
 				results <- fn(ctx, &httpMessage{

util_test.go

@@ -8,8 +8,52 @@ import (
 	"testing"
 
 	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/options"
+	"go.unistack.org/micro/v3/server"
 )
 
+func Test_Hook(t *testing.T) {
+	opts := server.Options{}
+
+	var fn server.HandlerFunc = func(fctx context.Context, req server.Request, rsp interface{}) (err error) {
+		// fmt.Println("1")
+		return nil
+	}
+
+	var fn2 server.HandlerWrapper = func(next server.HandlerFunc) server.HandlerFunc {
+		return func(ctx context.Context, req server.Request, rsp interface{}) error {
+			//	fmt.Println("2")
+			return next(ctx, req, rsp)
+		}
+	}
+	var fn3 server.HandlerWrapper = func(next server.HandlerFunc) server.HandlerFunc {
+		return func(ctx context.Context, req server.Request, rsp interface{}) error {
+			// fmt.Println("3")
+			return next(ctx, req, rsp)
+		}
+	}
+	var fn4 server.HandlerWrapper = func(next server.HandlerFunc) server.HandlerFunc {
+		return func(ctx context.Context, req server.Request, rsp interface{}) error {
+			// fmt.Println("4")
+			return next(ctx, req, rsp)
+		}
+	}
+
+	opts.Hooks = append(opts.Hooks, fn2, fn3, fn4)
+
+	opts.Hooks.EachNext(func(hook options.Hook) {
+		if h, ok := hook.(server.HandlerWrapper); ok {
+			// fmt.Printf("h %#+v\n", h)
+			fn = h(fn)
+		}
+	})
+
+	err := fn(nil, nil, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
 func TestFillrequest(t *testing.T) {
 	md := metadata.New(1)
 	md.Set("ClientID", "xxx")