Merge pull request 'update for latest micro' (#198) from register into v3

Reviewed-on: #198

.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

README.md

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

go.mod

@@ -1,19 +1,25 @@
-module go.unistack.org/micro-server-http/v4
+module go.unistack.org/micro-server-http/v3
+
+go 1.22.0
 
-go 1.19
 
 require (
-	go.unistack.org/micro-proto/v4 v4.0.0
+	go.unistack.org/micro-client-http/v3 v3.9.15
-	go.unistack.org/micro/v4 v4.0.1
+	go.unistack.org/micro-codec-yaml/v3 v3.10.3
-	golang.org/x/net v0.10.0
+	go.unistack.org/micro-proto/v3 v3.4.1
+	go.unistack.org/micro/v3 v3.11.30
+	golang.org/x/net v0.33.0
 )
 
 require (
-	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/ash3in/uuidv8 v1.2.0 // indirect
-	github.com/google/gnostic v0.6.9 // indirect
+	github.com/google/gnostic v0.7.0 // indirect
-	github.com/google/go-cmp v0.5.9 // indirect
+	github.com/google/gnostic-models v0.6.9 // indirect
-	github.com/kr/text v0.2.0 // indirect
+	github.com/google/uuid v1.6.0 // indirect
-	google.golang.org/protobuf v1.30.0 // indirect
+	github.com/matoous/go-nanoid v1.5.1 // indirect
-	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
+	golang.org/x/sys v0.28.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20241223144023-3abc09e42ca8 // indirect
+	google.golang.org/grpc v1.69.2 // indirect
+	google.golang.org/protobuf v1.36.1 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

handler.go

@@ -6,23 +6,29 @@ import (
 	"io"
 	"net/http"
 	"reflect"
+	"slices"
+	"strconv"
 	"strings"
 	"sync"
+	"time"
 
-	"go.unistack.org/micro/v4/errors"
+	"go.unistack.org/micro/v3/errors"
-	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v3/metadata"
-	"go.unistack.org/micro/v4/register"
+	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v4/server"
+	"go.unistack.org/micro/v3/options"
-	rhttp "go.unistack.org/micro/v4/util/http"
+	"go.unistack.org/micro/v3/semconv"
-	rflutil "go.unistack.org/micro/v4/util/reflect"
+	"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"
 )
 
 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"
@@ -39,7 +45,6 @@ type httpHandler struct {
 	hd       interface{}
 	handlers *rhttp.Trie
 	name     string
-	eps      []*register.Endpoint
 	sopts    server.Options
 	sync.RWMutex
 }
@@ -52,10 +57,6 @@ func (h *httpHandler) Handler() interface{} {
 	return h.hd
 }
 
-func (h *httpHandler) Endpoints() []*register.Endpoint {
-	return h.eps
-}
-
 func (h *httpHandler) Options() server.HandlerOptions {
 	return h.opts
 }
@@ -115,15 +116,16 @@ func (h *Server) HTTPHandlerFunc(handler interface{}) (http.HandlerFunc, error)
 		md["Method"] = r.Method
 		md["URL"] = r.URL.String()
 		md["Proto"] = r.Proto
-		md["ContentLength"] = fmt.Sprintf("%d", r.ContentLength)
+		md["Content-Length"] = fmt.Sprintf("%d", r.ContentLength)
-		md["TransferEncoding"] = strings.Join(r.TransferEncoding, ",")
+		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-ALPN"] = r.TLS.NegotiatedProtocol
-			md["TLS_ServerName"] = r.TLS.ServerName
+			md["TLS-ServerName"] = r.TLS.ServerName
 		}
+
 		ctx = metadata.NewIncomingContext(ctx, md)
 
 		path := r.URL.Path
@@ -164,7 +166,7 @@ func (h *Server) HTTPHandlerFunc(handler interface{}) (http.HandlerFunc, error)
 						hdlr := shdlr.(*httpHandler)
 						fh, mp, err := hdlr.handlers.Search(http.MethodPost, "/"+microMethod)
 						if err == nil {
-							match = true
+							// match = true
 							for k, v := range mp {
 								matches[k] = v
 							}
@@ -191,8 +193,7 @@ func (h *Server) HTTPHandlerFunc(handler interface{}) (http.HandlerFunc, error)
 
 		cf, err := h.newCodec(ct)
 		if err != nil {
-			w.WriteHeader(http.StatusBadRequest)
+			w.WriteHeader(http.StatusUnsupportedMediaType)
-			_, _ = w.Write([]byte(err.Error()))
 			return
 		}
 
@@ -271,9 +272,11 @@ func (h *Server) HTTPHandlerFunc(handler interface{}) (http.HandlerFunc, error)
 		}
 
 		// wrap the handler func
-		for i := len(handler.sopts.HdlrWrappers); i > 0; i-- {
+		h.opts.Hooks.EachPrev(func(hook options.Hook) {
-			fn = handler.sopts.HdlrWrappers[i-1](fn)
+			if h, ok := hook.(server.HookHandler); ok {
-		}
+				fn = h(fn)
+			}
+		})
 
 		if ct == "application/x-www-form-urlencoded" {
 			cf, err = h.newCodec(DefaultContentType)
@@ -302,7 +305,7 @@ func (h *Server) HTTPHandlerFunc(handler interface{}) (http.HandlerFunc, error)
 		}
 		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
 			}
 		}
@@ -323,7 +326,7 @@ func (h *Server) HTTPHandlerFunc(handler interface{}) (http.HandlerFunc, error)
 		}
 
 		if err != nil && handler.sopts.Logger.V(logger.ErrorLevel) {
-			handler.sopts.Logger.Errorf(handler.sopts.Context, "handler err: %v", err)
+			handler.sopts.Logger.Error(handler.sopts.Context, "handler error", err)
 			return
 		}
 
@@ -333,7 +336,7 @@ func (h *Server) HTTPHandlerFunc(handler interface{}) (http.HandlerFunc, error)
 		w.WriteHeader(scode)
 
 		if _, cerr := w.Write(buf); cerr != nil {
-			handler.sopts.Logger.Errorf(ctx, "write failed: %v", cerr)
+			handler.sopts.Logger.Error(ctx, "write failed", cerr)
 		}
 	}, nil
 }
@@ -344,8 +347,11 @@ func (h *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		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)
@@ -369,6 +375,7 @@ func (h *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	md["Host"] = r.Host
 	md["RequestURI"] = r.RequestURI
 	ctx = metadata.NewIncomingContext(ctx, md)
+	ctx = metadata.NewOutgoingContext(ctx, metadata.New(0))
 
 	path := r.URL.Path
 	if !strings.HasPrefix(path, "/") {
@@ -420,21 +427,116 @@ func (h *Server) 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)
+			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)
@@ -481,6 +583,7 @@ func (h *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	if r.Body != nil {
 		var buf []byte
 		buf, err = io.ReadAll(r.Body)
+		r.Body.Close()
 		if err != nil && err != io.EOF {
 			h.errorHandler(ctx, handler, w, r, err, http.StatusInternalServerError)
 			return
@@ -530,13 +633,18 @@ func (h *Server) 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
+	h.opts.Hooks.EachPrev(func(hook options.Hook) {
-	for i := len(handler.sopts.HdlrWrappers); i > 0; i-- {
+		if h, ok := hook.(server.HookHandler); ok {
-		fn = handler.sopts.HdlrWrappers[i-1](fn)
+			fn = h(fn)
-	}
+		}
+	})
 
 	if ct == "application/x-www-form-urlencoded" {
 		cf, err = h.newCodec(DefaultContentType)
@@ -565,7 +673,7 @@ func (h *Server) 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
 		}
 	}
@@ -585,17 +693,18 @@ func (h *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		buf, err = cf.Marshal(replyv.Interface())
 	}
 
-	if err != nil && handler.sopts.Logger.V(logger.ErrorLevel) {
+	if err != nil {
-		handler.sopts.Logger.Errorf(handler.sopts.Context, "handler err: %v", err)
+		if handler.sopts.Logger.V(logger.ErrorLevel) {
-		return
+			handler.sopts.Logger.Error(handler.sopts.Context, "handler error", err)
-	}
+		}
-
+		scode = http.StatusInternalServerError
-	if nscode := GetRspCode(ctx); nscode != 0 {
+	} 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

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

handler/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/health.go

@@ -1,27 +1,42 @@
-package health // import "go.unistack.org/micro-server-http/v4/handler/health"
+package health_handler
 
 import (
 	"context"
 
-	codecpb "go.unistack.org/micro-proto/v4/codec"
+	codecpb "go.unistack.org/micro-proto/v3/codec"
-	"go.unistack.org/micro/v4/errors"
+	"go.unistack.org/micro/v3/errors"
 )
 
-var _ HealthServiceServer = (*Handler)(nil)
+var _ HealthServiceServer = &Handler{}
 
 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
+	Version      string
-	Name        string
+	Name         string
-	LiveChecks  []CheckFunc
+	Staters      []Stater
-	ReadyChecks []CheckFunc
+	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.v4.handler.health;
+package micro.server.http.v3.handler.health;
-option go_package = "go.unistack.org/micro-server-http/v4/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 v4.0.0
+// - protoc-gen-go-micro v3.10.4
-// - protoc              v3.21.12
+// - protoc              v5.28.3
 // source: health/health.proto
 
-package health
+package health_handler
 
 import (
 	context "context"
-	codec "go.unistack.org/micro-proto/v4/codec"
+	codec "go.unistack.org/micro-proto/v3/codec"
-	v4 "go.unistack.org/micro-server-http/v4"
+	client "go.unistack.org/micro/v3/client"
 )
 
 var (
 	HealthServiceName = "HealthService"
 )
-var (
+
-	HealthServiceServerEndpoints = []v4.EndpointMetadata{
+type HealthServiceClient interface {
-		{
+	Healthy(ctx context.Context, req *codec.Frame, opts ...client.CallOption) (*codec.Frame, error)
-			Name:   "HealthService.Live",
+	Live(ctx context.Context, req *codec.Frame, opts ...client.CallOption) (*codec.Frame, error)
-			Path:   "/live",
+	Ready(ctx context.Context, req *codec.Frame, opts ...client.CallOption) (*codec.Frame, error)
-			Method: "GET",
+	Version(ctx context.Context, req *codec.Frame, opts ...client.CallOption) (*codec.Frame, error)
-			Body:   "",
+}
-			Stream: false,
-		},
-		{
-			Name:   "HealthService.Ready",
-			Path:   "/ready",
-			Method: "GET",
-			Body:   "",
-			Stream: false,
-		},
-		{
-			Name:   "HealthService.Version",
-			Path:   "/version",
-			Method: "GET",
-			Body:   "",
-			Stream: false,
-		},
-	}
-)
 
 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: v4.0.0
+// protoc-gen-go-micro version: v3.10.4
 // source: health/health.proto
 
-package health
+package health_handler
 
 import (
 	context "context"
-	codec "go.unistack.org/micro-proto/v4/codec"
+	v31 "go.unistack.org/micro-client-http/v3"
-	v4 "go.unistack.org/micro-server-http/v4"
+	codec "go.unistack.org/micro-proto/v3/codec"
-	server "go.unistack.org/micro/v4/server"
+	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
@@ -38,6 +181,6 @@ func RegisterHealthServiceServer(s server.Server, sh HealthServiceServer, opts .
 	}
 	h := &healthServiceServer{sh}
 	var nopts []server.HandlerOption
-	nopts = append(nopts, v4.HandlerEndpoints(HealthServiceServerEndpoints))
+	nopts = append(nopts, v3.HandlerEndpoints(HealthServiceServerEndpoints))
 	return s.Handle(s.NewHandler(&HealthService{h}, append(nopts, opts...)...))
 }

handler/meter/meter.go

@@ -1,27 +1,50 @@
-package meter // import "go.unistack.org/micro-server-http/v4/handler/meter"
+package meter_handler
 
 import (
 	"bytes"
+	"compress/gzip"
 	"context"
+	"io"
+	"strings"
+	"sync"
 
-	codecpb "go.unistack.org/micro-proto/v4/codec"
+	codecpb "go.unistack.org/micro-proto/v3/codec"
-	"go.unistack.org/micro/v4/errors"
+	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v4/meter"
+	"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)(nil)
+var _ MeterServiceServer = &Handler{}
 
 type Handler struct {
-	opts Options
+	Options Options
 }
 
 type Option func(*Options)
 
 type Options struct {
-	Meter        meter.Meter
+	Meter           meter.Meter
-	Name         string
+	Name            string
-	MeterOptions []meter.Option
+	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)
+	log, ok := logger.FromContext(ctx)
-	if err := h.opts.Meter.Write(buf, h.opts.MeterOptions...); err != nil {
+	if !ok {
-		return errors.InternalServerError(h.opts.Name, "%v", err)
+		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.v4.handler.meter;
+package micro.server.http.v3.handler.meter;
-option go_package = "go.unistack.org/micro-server-http/v4/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 v4.0.0
+// - protoc-gen-go-micro v3.10.4
-// - protoc              v3.21.12
+// - protoc              v5.28.3
 // source: meter/meter.proto
 
-package meter
+package meter_handler
 
 import (
 	context "context"
-	codec "go.unistack.org/micro-proto/v4/codec"
+	codec "go.unistack.org/micro-proto/v3/codec"
-	v4 "go.unistack.org/micro-server-http/v4"
+	client "go.unistack.org/micro/v3/client"
 )
 
 var (
 	MeterServiceName = "MeterService"
 )
-var (
+
-	MeterServiceServerEndpoints = []v4.EndpointMetadata{
+type MeterServiceClient interface {
-		{
+	Metrics(ctx context.Context, req *codec.Frame, opts ...client.CallOption) (*codec.Frame, error)
-			Name:   "MeterService.Metrics",
+}
-			Path:   "/metrics",
-			Method: "GET",
-			Body:   "",
-			Stream: false,
-		},
-	}
-)
 
 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: v4.0.0
+// protoc-gen-go-micro version: v3.10.4
 // source: meter/meter.proto
 
-package meter
+package meter_handler
 
 import (
 	context "context"
-	codec "go.unistack.org/micro-proto/v4/codec"
+	v31 "go.unistack.org/micro-client-http/v3"
-	v4 "go.unistack.org/micro-server-http/v4"
+	codec "go.unistack.org/micro-proto/v3/codec"
-	server "go.unistack.org/micro/v4/server"
+	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
 }
@@ -28,6 +70,6 @@ func RegisterMeterServiceServer(s server.Server, sh MeterServiceServer, opts ...
 	}
 	h := &meterServiceServer{sh}
 	var nopts []server.HandlerOption
-	nopts = append(nopts, v4.HandlerEndpoints(MeterServiceServerEndpoints))
+	nopts = append(nopts, v3.HandlerEndpoints(MeterServiceServerEndpoints))
 	return s.Handle(s.NewHandler(&MeterService{h}, append(nopts, opts...)...))
 }

handler/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/swagger-initializer.js

@@ -1,20 +0,0 @@
-window.onload = function() {
-  //<editor-fold desc="Changeable Configuration Block">
-
-  // the following lines will be replaced by docker/configurator, when it runs in a docker-container
-  window.ui = SwaggerUIBundle({
-    url: "{{ .SWAGGER }}",
-    dom_id: '#swagger-ui',
-    deepLinking: true,
-    presets: [
-      SwaggerUIBundle.presets.apis,
-      SwaggerUIStandalonePreset
-    ],
-    plugins: [
-      SwaggerUIBundle.plugins.DownloadUrl
-    ],
-    layout: "StandaloneLayout"
-  });
-
-  //</editor-fold>
-};

handler/swagger-ui/swaggerui.go

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

handler/swagger-ui/swaggerui_test.go

@@ -1,4 +1,4 @@
-package swaggerui
+package swaggerui_handler
 
 import (
 	"net/http"

handler/swagger/swagger.go

@@ -1,24 +1,18 @@
-package swagger // import "go.unistack.org/micro-server-http/v4/handler/swagger"
+package swagger_handler
 
 import (
-	"context"
 	"io/fs"
 	"net/http"
 
-	httpsrv "go.unistack.org/micro-server-http/v4"
+	yamlcodec "go.unistack.org/micro-codec-yaml/v3"
-	"go.unistack.org/micro/v4/server"
+	rutil "go.unistack.org/micro/v3/util/reflect"
-)
-
-type (
-	Hook         func([]byte) []byte
-	ErrorHandler func(ctx context.Context, s server.Handler, w http.ResponseWriter, r *http.Request, err error, status int)
 )
 
 // Handler append to generated swagger data from dst map[string]interface{}
-var Handler = func(fsys fs.FS, hooks []Hook, h httpsrv.ErrorHandler) http.HandlerFunc {
+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 {
-			h(r.Context())
 			w.WriteHeader(http.StatusNotFound)
 			return
 		}
@@ -35,6 +29,32 @@ var Handler = func(fsys fs.FS, hooks []Hook, h httpsrv.ErrorHandler) http.Handle
 			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

@@ -1,5 +1,5 @@
 // Package http implements a go-micro.Server
-package http // import "go.unistack.org/micro-server-http/v4"
+package http // import "go.unistack.org/micro-server-http/v3"
 
 import (
 	"context"
@@ -9,15 +9,18 @@ import (
 	"net"
 	"net/http"
 	"reflect"
+	"sort"
 	"strings"
 	"sync"
+	"sync/atomic"
 	"time"
 
-	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v3/broker"
-	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v3/codec"
-	"go.unistack.org/micro/v4/register"
+	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v4/server"
+	"go.unistack.org/micro/v3/register"
-	rhttp "go.unistack.org/micro/v4/util/http"
+	"go.unistack.org/micro/v3/server"
+	rhttp "go.unistack.org/micro/v3/util/http"
 	"golang.org/x/net/netutil"
 )
 
@@ -28,9 +31,13 @@ type Server struct {
 	rsvc         *register.Service
 	handlers     map[string]server.Handler
 	exit         chan chan error
+	subscribers  map[*httpSubscriber][]broker.Subscriber
 	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
@@ -98,6 +105,10 @@ func (h *Server) Init(opts ...server.Option) error {
 		h.RUnlock()
 		return err
 	}
+	if err := h.opts.Broker.Init(); err != nil {
+		h.RUnlock()
+		return err
+	}
 	if err := h.opts.Tracer.Init(); err != nil {
 		h.RUnlock()
 		return err
@@ -110,10 +121,7 @@ func (h *Server) 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()
@@ -155,16 +163,7 @@ func (h *Server) Handle(handler server.Handler) error {
 func (h *Server) NewHandler(handler interface{}, opts ...server.HandlerOption) server.Handler {
 	options := server.NewHandlerOptions(opts...)
 
-	eps := make([]*register.Endpoint, 0, len(options.Metadata))
-	for name, metadata := range options.Metadata {
-		eps = append(eps, &register.Endpoint{
-			Name:     name,
-			Metadata: metadata,
-		})
-	}
-
 	hdlr := &httpHandler{
-		eps:      eps,
 		hd:       handler,
 		opts:     options,
 		sopts:    h.opts,
@@ -184,6 +183,11 @@ func (h *Server) NewHandler(handler interface{}, opts ...server.HandlerOption) s
 		}
 	*/
 
+	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:]
@@ -197,16 +201,16 @@ func (h *Server) NewHandler(handler interface{}, opts ...server.HandlerOption) s
 		}
 
 		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
 		}
 
@@ -216,14 +220,23 @@ func (h *Server) NewHandler(handler interface{}, opts ...server.HandlerOption) s
 		pth := &patHandler{mtype: mtype, name: name, rcvr: rcvr}
 		hdlr.name = name
 
-		if err := hdlr.handlers.Insert([]string{md["Method"]}, md["Path"], pth); err != nil {
+		methods := []string{md["Method"]}
-			h.opts.Logger.Errorf(h.opts.Context, "cant add handler for %s %s", md["Method"], md["Path"])
+		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)
+			methods := []string{http.MethodPost}
-			if err := hdlr.handlers.Insert([]string{http.MethodPost}, "/"+hn, pth); err != nil {
+			if registerCORS {
-				h.opts.Logger.Errorf(h.opts.Context, "cant add rpc handler for http.MethodPost %s /%s", hn, hn)
+				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))
 			}
 		}
 	}
@@ -247,16 +260,16 @@ func (h *Server) NewHandler(handler interface{}, opts ...server.HandlerOption) s
 		}
 
 		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
 		}
 
@@ -266,14 +279,24 @@ func (h *Server) NewHandler(handler interface{}, opts ...server.HandlerOption) s
 		pth := &patHandler{mtype: mtype, name: name, rcvr: rcvr}
 		hdlr.name = name
 
-		if err := hdlr.handlers.Insert([]string{md.Method}, md.Path, pth); err != nil {
+		methods := []string{md.Method}
-			h.opts.Logger.Errorf(h.opts.Context, "cant add handler for %s %s", md.Method, md.Path)
+		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)
+			methods := []string{http.MethodPost}
-			if err := hdlr.handlers.Insert([]string{http.MethodPost}, "/"+hn, pth); err != nil {
+			if registerCORS {
-				h.opts.Logger.Errorf(h.opts.Context, "cant add rpc handler for http.MethodPost %s /%s", hn, hn)
+				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))
 			}
 		}
 	}
@@ -281,12 +304,37 @@ func (h *Server) NewHandler(handler interface{}, opts ...server.HandlerOption) s
 	return hdlr
 }
 
-func (h *Server) Register() error {
+func (h *Server) NewSubscriber(topic string, handler interface{}, opts ...server.SubscriberOption) server.Subscriber {
-	var eps []*register.Endpoint
+	return newSubscriber(topic, handler, opts...)
-	h.RLock()
+}
-	for _, hdlr := range h.handlers {
+
-		eps = append(eps, hdlr.Endpoints()...)
+func (h *Server) Subscribe(sb server.Subscriber) error {
+	sub, ok := sb.(*httpSubscriber)
+	if !ok {
+		return fmt.Errorf("invalid subscriber: expected *httpSubscriber")
 	}
+	if len(sub.handlers) == 0 {
+		return fmt.Errorf("invalid subscriber: no handler functions")
+	}
+
+	if err := server.ValidateSubscriber(sb); err != nil {
+		return err
+	}
+
+	h.RLock()
+	_, ok = h.subscribers[sub]
+	h.RUnlock()
+	if ok {
+		return fmt.Errorf("subscriber %v already exists", h)
+	}
+	h.Lock()
+	h.subscribers[sub] = nil
+	h.Unlock()
+	return nil
+}
+
+func (h *Server) Register() error {
+	h.RLock()
 	rsvc := h.rsvc
 	config := h.opts
 	h.RUnlock()
@@ -303,8 +351,18 @@ func (h *Server) Register() error {
 	if err != nil {
 		return err
 	}
-	service.Nodes[0].Metadata["protocol"] = "http"
+
-	service.Endpoints = eps
+	h.Lock()
+	subscriberList := make([]*httpSubscriber, 0, len(h.subscribers))
+	for e := range h.subscribers {
+		// Only advertise non internal subscribers
+		subscriberList = append(subscriberList, e)
+	}
+	sort.Slice(subscriberList, func(i, j int) bool {
+		return subscriberList[i].topic > subscriberList[j].topic
+	})
+
+	h.Unlock()
 
 	h.RLock()
 	registered := h.registered
@@ -312,7 +370,7 @@ func (h *Server) 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))
 		}
 	}
 
@@ -327,6 +385,7 @@ func (h *Server) Register() error {
 	}
 
 	h.Lock()
+
 	h.registered = true
 	h.rsvc = service
 	h.Unlock()
@@ -334,6 +393,35 @@ func (h *Server) Register() error {
 	return nil
 }
 
+func (h *Server) subscribe() error {
+	config := h.opts
+
+	for sb := range h.subscribers {
+		handler := h.createSubHandler(sb, config)
+		var opts []broker.SubscribeOption
+		if queue := sb.Options().Queue; len(queue) > 0 {
+			opts = append(opts, broker.SubscribeGroup(queue))
+		}
+
+		subCtx := config.Context
+		if cx := sb.Options().Context; cx != nil {
+			subCtx = cx
+		}
+		opts = append(opts, broker.SubscribeContext(subCtx))
+		opts = append(opts, broker.SubscribeAutoAck(sb.Options().AutoAck))
+		opts = append(opts, broker.SubscribeBodyOnly(sb.Options().BodyOnly))
+
+		sub, err := config.Broker.Subscribe(subCtx, sb.Topic(), handler, opts...)
+		if err != nil {
+			h.Unlock()
+			return err
+		}
+		h.subscribers[sb] = []broker.Subscriber{sub}
+	}
+
+	return nil
+}
+
 func (h *Server) Deregister() error {
 	h.RLock()
 	config := h.opts
@@ -345,7 +433,7 @@ func (h *Server) 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 {
@@ -361,6 +449,23 @@ func (h *Server) Deregister() error {
 	}
 
 	h.registered = false
+
+	subCtx := h.opts.Context
+	for sb, subs := range h.subscribers {
+		if cx := sb.Options().Context; cx != nil {
+			subCtx = cx
+		}
+
+		for _, sub := range subs {
+			config.Logger.Info(config.Context, "Unsubscribing from topic: "+sub.Topic())
+			if err := sub.Unsubscribe(subCtx); err != nil {
+				h.Unlock()
+				config.Logger.Error(config.Context, fmt.Sprintf("failed to unsubscribe topic: %s, error", sb.Topic()), err)
+				return err
+			}
+		}
+		h.subscribers[sb] = nil
+	}
 	h.Unlock()
 	return nil
 }
@@ -395,7 +500,7 @@ func (h *Server) 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()
@@ -403,7 +508,6 @@ func (h *Server) Start() error {
 	h.Unlock()
 
 	var handler http.Handler
-	var srvFunc func(net.Listener) error
 
 	// nolint: nestif
 	if h.opts.Context != nil {
@@ -434,9 +538,13 @@ func (h *Server) Start() error {
 		return fmt.Errorf("cant process with nil handler")
 	}
 
+	if err := config.Broker.Connect(h.opts.Context); err != nil {
+		return err
+	}
+
 	if err := config.RegisterCheck(h.opts.Context); err != nil {
 		if config.Logger.V(logger.ErrorLevel) {
-			config.Logger.Errorf(config.Context, "Server %s-%s register check error: %s", config.Name, config.ID, err)
+			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 {
@@ -444,8 +552,13 @@ func (h *Server) 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
@@ -453,25 +566,22 @@ func (h *Server) 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() {
-		go func() {
+		if cerr := hs.Serve(ts); cerr != nil && !errors.Is(cerr, http.ErrServerClosed) {
-			if cerr := srvFunc(ts); cerr != nil && !errors.Is(cerr, net.ErrClosed) {
+			h.opts.Logger.Error(h.opts.Context, "serve error", cerr)
-				h.opts.Logger.Error(h.opts.Context, cerr)
+		}
-			}
+		h.stateLive.Store(0)
-		}()
+		h.stateReady.Store(0)
-	} else {
+		h.stateHealth.Store(0)
-		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() {
 		t := new(time.Ticker)
@@ -497,28 +607,28 @@ func (h *Server) 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:
@@ -528,12 +638,28 @@ func (h *Server) 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)
 		}
 
-		ch <- ts.Close()
+		if err := config.Broker.Disconnect(config.Context); err != nil {
+			config.Logger.Error(config.Context, "Broker disconnect error", err)
+		}
+
+		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
 }
 
@@ -551,6 +677,18 @@ func (h *Server) Name() string {
 	return h.opts.Name
 }
 
+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
@@ -558,8 +696,12 @@ func NewServer(opts ...server.Option) *Server {
 		eh = v
 	}
 	return &Server{
+		stateLive:    &atomic.Uint32{},
+		stateReady:   &atomic.Uint32{},
+		stateHealth:  &atomic.Uint32{},
 		opts:         options,
 		exit:         make(chan chan error),
+		subscribers:  make(map[*httpSubscriber][]broker.Subscriber),
 		errorHandler: eh,
 		pathHandlers: rhttp.NewTrie(),
 	}

message.go

@@ -1,8 +1,8 @@
 package http
 
 import (
-	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v3/codec"
-	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v3/metadata"
 )
 
 type httpMessage struct {
@@ -11,7 +11,6 @@ type httpMessage struct {
 	header      metadata.Metadata
 	topic       string
 	contentType string
-	body        []byte
 }
 
 func (r *httpMessage) Topic() string {

options.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"net/http"
 
-	"go.unistack.org/micro/v4/server"
+	"go.unistack.org/micro/v3/server"
 )
 
 // SetError pass error to caller
@@ -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
 	}
@@ -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

@@ -1,17 +1,18 @@
 package http
 
 import (
-	"io"
+	"go.unistack.org/micro/v3/codec"
-
+	"go.unistack.org/micro/v3/metadata"
-	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v3/server"
-	"go.unistack.org/micro/v4/metadata"
-	"go.unistack.org/micro/v4/server"
 )
 
-var _ server.Request = &rpcRequest{}
+var (
+	_ server.Request = &rpcRequest{}
+	_ server.Message = &rpcMessage{}
+)
 
 type rpcRequest struct {
-	rw          io.ReadWriter
+	// rw          io.ReadWriter
 	payload     interface{}
 	codec       codec.Codec
 	header      metadata.Metadata
@@ -22,6 +23,14 @@ type rpcRequest struct {
 	stream      bool
 }
 
+type rpcMessage struct {
+	payload     interface{}
+	codec       codec.Codec
+	header      metadata.Metadata
+	topic       string
+	contentType string
+}
+
 func (r *rpcRequest) ContentType() string {
 	return r.contentType
 }
@@ -47,11 +56,7 @@ func (r *rpcRequest) Header() metadata.Metadata {
 }
 
 func (r *rpcRequest) Read() ([]byte, error) {
-	f := &codec.Frame{}
+	return nil, nil
-	if err := r.codec.ReadBody(r.rw, f); err != nil {
-		return nil, err
-	}
-	return f.Data, nil
 }
 
 func (r *rpcRequest) Stream() bool {
@@ -61,3 +66,23 @@ func (r *rpcRequest) Stream() bool {
 func (r *rpcRequest) Body() interface{} {
 	return r.payload
 }
+
+func (r *rpcMessage) ContentType() string {
+	return r.contentType
+}
+
+func (r *rpcMessage) Topic() string {
+	return r.topic
+}
+
+func (r *rpcMessage) Body() interface{} {
+	return r.payload
+}
+
+func (r *rpcMessage) Header() metadata.Metadata {
+	return r.header
+}
+
+func (r *rpcMessage) Codec() codec.Codec {
+	return r.codec
+}

server.go

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

subscriber.go

@@ -0,0 +1,175 @@
+package http
+
+import (
+	"context"
+	"fmt"
+	"reflect"
+	"strings"
+
+	"go.unistack.org/micro/v3/broker"
+	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/options"
+	"go.unistack.org/micro/v3/server"
+)
+
+var typeOfError = reflect.TypeOf((*error)(nil)).Elem()
+
+type handler struct {
+	reqType reflect.Type
+	ctxType reflect.Type
+	method  reflect.Value
+}
+
+type httpSubscriber struct {
+	topic      string
+	rcvr       reflect.Value
+	typ        reflect.Type
+	subscriber interface{}
+	handlers   []*handler
+	opts       server.SubscriberOptions
+}
+
+func newSubscriber(topic string, sub interface{}, opts ...server.SubscriberOption) server.Subscriber {
+	options := server.NewSubscriberOptions(opts...)
+
+	var handlers []*handler
+
+	if typ := reflect.TypeOf(sub); typ.Kind() == reflect.Func {
+		h := &handler{
+			method: reflect.ValueOf(sub),
+		}
+
+		switch typ.NumIn() {
+		case 1:
+			h.reqType = typ.In(0)
+		case 2:
+			h.ctxType = typ.In(0)
+			h.reqType = typ.In(1)
+		}
+
+		handlers = append(handlers, h)
+	} else {
+		for m := 0; m < typ.NumMethod(); m++ {
+			method := typ.Method(m)
+			h := &handler{
+				method: method.Func,
+			}
+
+			switch method.Type.NumIn() {
+			case 2:
+				h.reqType = method.Type.In(1)
+			case 3:
+				h.ctxType = method.Type.In(1)
+				h.reqType = method.Type.In(2)
+			}
+
+			handlers = append(handlers, h)
+		}
+	}
+
+	return &httpSubscriber{
+		rcvr:       reflect.ValueOf(sub),
+		typ:        reflect.TypeOf(sub),
+		topic:      topic,
+		subscriber: sub,
+		handlers:   handlers,
+		opts:       options,
+	}
+}
+
+func (s *Server) createSubHandler(sb *httpSubscriber, opts server.Options) broker.Handler {
+	return func(p broker.Event) error {
+		msg := p.Message()
+		ct := msg.Header["Content-Type"]
+		cf, err := s.newCodec(ct)
+		if err != nil {
+			return err
+		}
+
+		hdr := metadata.Copy(msg.Header)
+		ctx := metadata.NewIncomingContext(context.Background(), hdr)
+
+		results := make(chan error, len(sb.handlers))
+
+		for i := 0; i < len(sb.handlers); i++ {
+			handler := sb.handlers[i]
+
+			var isVal bool
+			var req reflect.Value
+
+			if handler.reqType.Kind() == reflect.Ptr {
+				req = reflect.New(handler.reqType.Elem())
+			} else {
+				req = reflect.New(handler.reqType)
+				isVal = true
+			}
+			if isVal {
+				req = req.Elem()
+			}
+
+			if err := cf.Unmarshal(msg.Body, req.Interface()); err != nil {
+				return err
+			}
+
+			fn := func(ctx context.Context, msg server.Message) error {
+				var vals []reflect.Value
+				if sb.typ.Kind() != reflect.Func {
+					vals = append(vals, sb.rcvr)
+				}
+				if handler.ctxType != nil {
+					vals = append(vals, reflect.ValueOf(ctx))
+				}
+
+				vals = append(vals, reflect.ValueOf(msg.Body()))
+
+				returnValues := handler.method.Call(vals)
+				if err := returnValues[0].Interface(); err != nil {
+					return err.(error)
+				}
+				return nil
+			}
+
+			opts.Hooks.EachPrev(func(hook options.Hook) {
+				if h, ok := hook.(server.HookSubHandler); ok {
+					fn = h(fn)
+				}
+			})
+
+			go func() {
+				results <- fn(ctx, &httpMessage{
+					topic:       sb.topic,
+					contentType: ct,
+					payload:     req.Interface(),
+					header:      msg.Header,
+					codec:       cf,
+				})
+			}()
+		}
+
+		var errors []string
+
+		for i := 0; i < len(sb.handlers); i++ {
+			if err := <-results; err != nil {
+				errors = append(errors, err.Error())
+			}
+		}
+
+		if len(errors) > 0 {
+			return fmt.Errorf("subscriber error: %s", strings.Join(errors, "\n"))
+		}
+
+		return nil
+	}
+}
+
+func (s *httpSubscriber) Topic() string {
+	return s.topic
+}
+
+func (s *httpSubscriber) Subscriber() interface{} {
+	return s.subscriber
+}
+
+func (s *httpSubscriber) Options() server.SubscriberOptions {
+	return s.opts
+}

util.go

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

util_test.go

@@ -7,9 +7,53 @@ import (
 	"strings"
 	"testing"
 
-	"go.unistack.org/micro/v4/metadata"
+	"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")