add reload for web api

api/api.go

@@ -2,13 +2,11 @@ package api
 
 import (
 	"embed"
-	"net"
 	"net/http"
 
 	"github.com/gin-contrib/cors"
 	"github.com/gin-gonic/gin"
 	"github.com/go-gost/core/auth"
-	"github.com/go-gost/core/service"
 )
 
 var (
@@ -21,55 +19,17 @@ type Response struct {
 	Msg  string `json:"msg,omitempty"`
 }
 
-type options struct {
+type Options struct {
-	accessLog  bool
+	AccessLog  bool
-	pathPrefix string
+	PathPrefix string
-	auther     auth.Authenticator
+	Auther     auth.Authenticator
 }
 
-type Option func(*options)
+func Register(r *gin.Engine, opts *Options) {
-
+	if opts == nil {
-func PathPrefixOption(pathPrefix string) Option {
+		opts = &Options{}
-	return func(o *options) {
-		o.pathPrefix = pathPrefix
-	}
-}
-
-func AccessLogOption(enable bool) Option {
-	return func(o *options) {
-		o.accessLog = enable
-	}
-}
-
-func AutherOption(auther auth.Authenticator) Option {
-	return func(o *options) {
-		o.auther = auther
-	}
-}
-
-type server struct {
-	s      *http.Server
-	ln     net.Listener
-	cclose chan struct{}
-}
-
-func NewService(network, addr string, opts ...Option) (service.Service, error) {
-	if network == "" {
-		network = "tcp"
-	}
-	ln, err := net.Listen(network, addr)
-	if err != nil {
-		return nil, err
 	}
 
-	var options options
-	for _, opt := range opts {
-		opt(&options)
-	}
-
-	gin.SetMode(gin.ReleaseMode)
-
-	r := gin.New()
 	r.Use(
 		cors.New((cors.Config{
 			AllowAllOrigins:     true,
@@ -79,55 +39,25 @@ func NewService(network, addr string, opts ...Option) (service.Service, error) {
 		})),
 		gin.Recovery(),
 	)
-	if options.accessLog {
+	if opts.AccessLog {
 		r.Use(mwLogger())
 	}
 
 	router := r.Group("")
-	if options.pathPrefix != "" {
+	if opts.PathPrefix != "" {
-		router = router.Group(options.pathPrefix)
+		router = router.Group(opts.PathPrefix)
 	}
 
 	router.StaticFS("/docs", http.FS(swaggerDoc))
 
 	config := router.Group("/config")
-	config.Use(mwBasicAuth(options.auther))
+	config.Use(mwBasicAuth(opts.Auther))
-	registerConfig(config)
 
-	return &server{
-		s: &http.Server{
-			Handler: r,
-		},
-		ln:     ln,
-		cclose: make(chan struct{}),
-	}, nil
-}
-
-func (s *server) Serve() error {
-	return s.s.Serve(s.ln)
-}
-
-func (s *server) Addr() net.Addr {
-	return s.ln.Addr()
-}
-
-func (s *server) Close() error {
-	return s.s.Close()
-}
-
-func (s *server) IsClosed() bool {
-	select {
-	case <-s.cclose:
-		return true
-	default:
-		return false
-	}
-}
-
-func registerConfig(config *gin.RouterGroup) {
 	config.GET("", getConfig)
 	config.POST("", saveConfig)
 
+	config.POST("/reload", reloadConfig)
+
 	config.POST("/services", createService)
 	config.PUT("/services/:service", updateService)
 	config.DELETE("/services/:service", deleteService)

api/config_reload.go

@@ -0,0 +1,56 @@
+package api
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/go-gost/x/config"
+	"github.com/go-gost/x/config/loader"
+	"github.com/go-gost/x/config/parsing/parser"
+	"github.com/go-gost/x/registry"
+)
+
+// swagger:parameters reloadConfigRequest
+type reloadConfigRequest struct{}
+
+// successful operation.
+// swagger:response reloadConfigResponse
+type reloadConfigResponse struct {
+	Data Response
+}
+
+func reloadConfig(ctx *gin.Context) {
+	// swagger:route POST /config/reload Reload reloadConfigRequest
+	//
+	// Hot reload config.
+	//
+	//     Security:
+	//       basicAuth: []
+	//
+	//     Responses:
+	//       200: reloadConfigResponse
+
+	cfg, err := parser.Parse()
+	if err != nil {
+		writeError(ctx, NewError(http.StatusBadRequest, ErrCodeInvalid, err.Error()))
+		return
+	}
+
+	config.Set(cfg)
+
+	if err := loader.Load(cfg); err != nil {
+		writeError(ctx, NewError(http.StatusBadRequest, ErrCodeInvalid, err.Error()))
+		return
+	}
+
+	for _, svc := range registry.ServiceRegistry().GetAll() {
+		svc := svc
+		go func() {
+			svc.Serve()
+		}()
+	}
+
+	ctx.JSON(http.StatusOK, Response{
+		Msg: "OK",
+	})
+}

api/service/service.go

@@ -0,0 +1,96 @@
+package service
+
+import (
+	"net"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/go-gost/core/auth"
+	"github.com/go-gost/core/service"
+	"github.com/go-gost/x/api"
+)
+
+type options struct {
+	accessLog  bool
+	pathPrefix string
+	auther     auth.Authenticator
+}
+
+type Option func(*options)
+
+func PathPrefixOption(pathPrefix string) Option {
+	return func(o *options) {
+		o.pathPrefix = pathPrefix
+	}
+}
+
+func AccessLogOption(enable bool) Option {
+	return func(o *options) {
+		o.accessLog = enable
+	}
+}
+
+func AutherOption(auther auth.Authenticator) Option {
+	return func(o *options) {
+		o.auther = auther
+	}
+}
+
+type server struct {
+	s      *http.Server
+	ln     net.Listener
+	cclose chan struct{}
+}
+
+func NewService(network, addr string, opts ...Option) (service.Service, error) {
+	if network == "" {
+		network = "tcp"
+	}
+	ln, err := net.Listen(network, addr)
+	if err != nil {
+		return nil, err
+	}
+
+	var options options
+	for _, opt := range opts {
+		opt(&options)
+	}
+
+	gin.SetMode(gin.ReleaseMode)
+
+	r := gin.New()
+	api.Register(r, &api.Options{
+		AccessLog:  options.accessLog,
+		PathPrefix: options.pathPrefix,
+		Auther:     options.auther,
+	})
+
+	return &server{
+		s: &http.Server{
+			Handler: r,
+		},
+		ln:     ln,
+		cclose: make(chan struct{}),
+	}, nil
+}
+
+func (s *server) Serve() error {
+	return s.s.Serve(s.ln)
+}
+
+func (s *server) Addr() net.Addr {
+	return s.ln.Addr()
+}
+
+func (s *server) Close() error {
+	return s.s.Close()
+}
+
+func (s *server) IsClosed() bool {
+	select {
+	case <-s.cclose:
+		return true
+	default:
+		return false
+	}
+}

api/swagger.yaml

@@ -41,7 +41,7 @@ definitions:
             reload:
                 $ref: '#/definitions/Duration'
             reverse:
-                description: DEPRECATED by whitelist since beta.4
+                description: 'Deprecated: use whitelist instead'
                 type: boolean
                 x-go-name: Reverse
             whitelist:
@@ -102,7 +102,7 @@ definitions:
             reload:
                 $ref: '#/definitions/Duration'
             reverse:
-                description: DEPRECATED by whitelist since beta.4
+                description: 'Deprecated: use whitelist instead'
                 type: boolean
                 x-go-name: Reverse
             whitelist:
@@ -309,11 +309,13 @@ definitions:
             filter:
                 $ref: '#/definitions/NodeFilterConfig'
             host:
-                description: DEPRECATED by filter.host
+                description: 'Deprecated: use matcher instead'
                 type: string
                 x-go-name: Host
             http:
                 $ref: '#/definitions/HTTPNodeConfig'
+            matcher:
+                $ref: '#/definitions/NodeMatcherConfig'
             metadata:
                 additionalProperties: {}
                 type: object
@@ -325,11 +327,11 @@ definitions:
                 type: string
                 x-go-name: Network
             path:
-                description: DEPRECATED by filter.path
+                description: 'Deprecated: use matcher instead'
                 type: string
                 x-go-name: Path
             protocol:
-                description: DEPRECATED by filter.protocol
+                description: 'Deprecated: use matcher instead'
                 type: string
                 x-go-name: Protocol
             tls:
@@ -343,7 +345,7 @@ definitions:
                 type: string
                 x-go-name: Hop
             name:
-                description: DEPRECATED by hop field
+                description: 'Deprecated: use hop instead'
                 type: string
                 x-go-name: Name
             nodes:
@@ -355,6 +357,17 @@ definitions:
                 $ref: '#/definitions/SelectorConfig'
         type: object
         x-go-package: github.com/go-gost/x/config
+    HTTPBodyRewriteConfig:
+        properties:
+            Match:
+                type: string
+            Replacement:
+                type: string
+            Type:
+                description: filter by MIME types
+                type: string
+        type: object
+        x-go-package: github.com/go-gost/x/config
     HTTPLoader:
         properties:
             timeout:
@@ -371,20 +384,52 @@ definitions:
             header:
                 additionalProperties:
                     type: string
+                description: 'Deprecated: use requestHeader instead'
                 type: object
                 x-go-name: Header
             host:
+                description: rewrite host header
                 type: string
                 x-go-name: Host
+            requestHeader:
+                additionalProperties:
+                    type: string
+                description: additional request header
+                type: object
+                x-go-name: RequestHeader
+            responseHeader:
+                additionalProperties:
+                    type: string
+                description: additional response header
+                type: object
+                x-go-name: ResponseHeader
             rewrite:
+                description: 'Deprecated: use rewriteURL instead'
                 items:
                     $ref: '#/definitions/HTTPURLRewriteConfig'
                 type: array
                 x-go-name: Rewrite
+            rewriteBody:
+                description: rewrite response body
+                items:
+                    $ref: '#/definitions/HTTPBodyRewriteConfig'
+                type: array
+                x-go-name: RewriteBody
+            rewriteURL:
+                description: rewrite URL
+                items:
+                    $ref: '#/definitions/HTTPURLRewriteConfig'
+                type: array
+                x-go-name: RewriteURL
         type: object
         x-go-package: github.com/go-gost/x/config
     HTTPRecorder:
         properties:
+            header:
+                additionalProperties:
+                    type: string
+                type: object
+                x-go-name: Header
             timeout:
                 $ref: '#/definitions/Duration'
             url:
@@ -458,6 +503,10 @@ definitions:
             interface:
                 type: string
                 x-go-name: Interface
+            metadata:
+                additionalProperties: {}
+                type: object
+                x-go-name: Metadata
             name:
                 type: string
                 x-go-name: Name
@@ -737,6 +786,8 @@ definitions:
             interface:
                 type: string
                 x-go-name: Interface
+            matcher:
+                $ref: '#/definitions/NodeMatcherConfig'
             metadata:
                 additionalProperties: {}
                 type: object
@@ -744,6 +795,9 @@ definitions:
             name:
                 type: string
                 x-go-name: Name
+            netns:
+                type: string
+                x-go-name: Netns
             network:
                 type: string
                 x-go-name: Network
@@ -769,6 +823,17 @@ definitions:
                 x-go-name: Protocol
         type: object
         x-go-package: github.com/go-gost/x/config
+    NodeMatcherConfig:
+        properties:
+            priority:
+                format: int64
+                type: integer
+                x-go-name: Priority
+            rule:
+                type: string
+                x-go-name: Rule
+        type: object
+        x-go-package: github.com/go-gost/x/config
     ObserverConfig:
         properties:
             name:
@@ -821,9 +886,10 @@ definitions:
         x-go-package: github.com/go-gost/x/config
     RecorderObject:
         properties:
-            Metadata:
+            metadata:
                 additionalProperties: {}
                 type: object
+                x-go-name: Metadata
             name:
                 type: string
                 x-go-name: Name
@@ -850,6 +916,9 @@ definitions:
             type:
                 type: string
                 x-go-name: Type
+            username:
+                type: string
+                x-go-name: Username
         type: object
         x-go-package: github.com/go-gost/x/config
     RedisRecorder:
@@ -870,6 +939,9 @@ definitions:
             type:
                 type: string
                 x-go-name: Type
+            username:
+                type: string
+                x-go-name: Username
         type: object
         x-go-package: github.com/go-gost/x/config
     ResolverConfig:
@@ -983,7 +1055,7 @@ definitions:
                 type: string
                 x-go-name: Hosts
             interface:
-                description: DEPRECATED by metadata.interface since beta.5
+                description: 'Deprecated: use metadata.interface instead'
                 type: string
                 x-go-name: Interface
             limiter:
@@ -1139,6 +1211,11 @@ definitions:
         x-go-package: github.com/go-gost/x/config
     TLSOptions:
         properties:
+            alpn:
+                items:
+                    type: string
+                type: array
+                x-go-name: ALPN
             cipherSuites:
                 items:
                     type: string
@@ -1834,6 +1911,18 @@ paths:
             summary: Update recorder by name, the recorder must already exist.
             tags:
                 - Recorder
+    /config/reload:
+        post:
+            operationId: reloadConfigRequest
+            responses:
+                "200":
+                    $ref: '#/responses/reloadConfigResponse'
+            security:
+                - basicAuth:
+                    - '[]'
+            summary: Hot reload config.
+            tags:
+                - Reload
     /config/resolvers:
         post:
             operationId: createResolverRequest
@@ -2325,6 +2414,12 @@ responses:
             Config: {}
         schema:
             $ref: '#/definitions/Config'
+    reloadConfigResponse:
+        description: successful operation.
+        headers:
+            Data: {}
+        schema:
+            $ref: '#/definitions/Response'
     saveConfigResponse:
         description: successful operation.
         headers:

config/loader/loader.go

@@ -0,0 +1,232 @@
+package loader
+
+import (
+	"github.com/go-gost/core/logger"
+	"github.com/go-gost/x/config"
+	"github.com/go-gost/x/config/parsing"
+	admission_parser "github.com/go-gost/x/config/parsing/admission"
+	auth_parser "github.com/go-gost/x/config/parsing/auth"
+	bypass_parser "github.com/go-gost/x/config/parsing/bypass"
+	chain_parser "github.com/go-gost/x/config/parsing/chain"
+	hop_parser "github.com/go-gost/x/config/parsing/hop"
+	hosts_parser "github.com/go-gost/x/config/parsing/hosts"
+	ingress_parser "github.com/go-gost/x/config/parsing/ingress"
+	limiter_parser "github.com/go-gost/x/config/parsing/limiter"
+	logger_parser "github.com/go-gost/x/config/parsing/logger"
+	observer_parser "github.com/go-gost/x/config/parsing/observer"
+	recorder_parser "github.com/go-gost/x/config/parsing/recorder"
+	resolver_parser "github.com/go-gost/x/config/parsing/resolver"
+	router_parser "github.com/go-gost/x/config/parsing/router"
+	sd_parser "github.com/go-gost/x/config/parsing/sd"
+	service_parser "github.com/go-gost/x/config/parsing/service"
+	"github.com/go-gost/x/registry"
+)
+
+var (
+	defaultLoader *loader = &loader{}
+)
+
+func Load(cfg *config.Config) error {
+	return defaultLoader.Load(cfg)
+}
+
+type loader struct{}
+
+func (l *loader) Load(cfg *config.Config) error {
+	logCfg := cfg.Log
+	if logCfg == nil {
+		logCfg = &config.LogConfig{}
+	}
+	logger.SetDefault(logger_parser.ParseLogger(&config.LoggerConfig{Log: logCfg}))
+
+	tlsCfg, err := parsing.BuildDefaultTLSConfig(cfg.TLS)
+	if err != nil {
+		return err
+	}
+	parsing.SetDefaultTLSConfig(tlsCfg)
+
+	if err := register(cfg); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func register(cfg *config.Config) error {
+	if cfg == nil {
+		return nil
+	}
+
+	for name := range registry.LoggerRegistry().GetAll() {
+		registry.LoggerRegistry().Unregister(name)
+	}
+	for _, loggerCfg := range cfg.Loggers {
+		if err := registry.LoggerRegistry().Register(loggerCfg.Name, logger_parser.ParseLogger(loggerCfg)); err != nil {
+			return err
+		}
+	}
+
+	for name := range registry.AutherRegistry().GetAll() {
+		registry.AutherRegistry().Unregister(name)
+	}
+	for _, autherCfg := range cfg.Authers {
+		if err := registry.AutherRegistry().Register(autherCfg.Name, auth_parser.ParseAuther(autherCfg)); err != nil {
+			return err
+		}
+	}
+
+	for name := range registry.AdmissionRegistry().GetAll() {
+		registry.AdmissionRegistry().Unregister(name)
+	}
+	for _, admissionCfg := range cfg.Admissions {
+		if err := registry.AdmissionRegistry().Register(admissionCfg.Name, admission_parser.ParseAdmission(admissionCfg)); err != nil {
+			return err
+		}
+	}
+
+	for name := range registry.BypassRegistry().GetAll() {
+		registry.BypassRegistry().Unregister(name)
+	}
+	for _, bypassCfg := range cfg.Bypasses {
+		if err := registry.BypassRegistry().Register(bypassCfg.Name, bypass_parser.ParseBypass(bypassCfg)); err != nil {
+			return err
+		}
+	}
+
+	for name := range registry.ResolverRegistry().GetAll() {
+		registry.ResolverRegistry().Unregister(name)
+	}
+	for _, resolverCfg := range cfg.Resolvers {
+		r, err := resolver_parser.ParseResolver(resolverCfg)
+		if err != nil {
+			return err
+		}
+		if err := registry.ResolverRegistry().Register(resolverCfg.Name, r); err != nil {
+			return err
+		}
+	}
+
+	for name := range registry.HostsRegistry().GetAll() {
+		registry.HostsRegistry().Unregister(name)
+	}
+	for _, hostsCfg := range cfg.Hosts {
+		if err := registry.HostsRegistry().Register(hostsCfg.Name, hosts_parser.ParseHostMapper(hostsCfg)); err != nil {
+			return err
+		}
+	}
+
+	for name := range registry.IngressRegistry().GetAll() {
+		registry.IngressRegistry().Unregister(name)
+	}
+	for _, ingressCfg := range cfg.Ingresses {
+		if err := registry.IngressRegistry().Register(ingressCfg.Name, ingress_parser.ParseIngress(ingressCfg)); err != nil {
+			return err
+		}
+	}
+
+	for name := range registry.RouterRegistry().GetAll() {
+		registry.RouterRegistry().Unregister(name)
+	}
+	for _, routerCfg := range cfg.Routers {
+		if err := registry.RouterRegistry().Register(routerCfg.Name, router_parser.ParseRouter(routerCfg)); err != nil {
+			return err
+		}
+	}
+
+	for name := range registry.SDRegistry().GetAll() {
+		registry.SDRegistry().Unregister(name)
+	}
+	for _, sdCfg := range cfg.SDs {
+		if err := registry.SDRegistry().Register(sdCfg.Name, sd_parser.ParseSD(sdCfg)); err != nil {
+			return err
+		}
+	}
+
+	for name := range registry.ObserverRegistry().GetAll() {
+		registry.ObserverRegistry().Unregister(name)
+	}
+	for _, observerCfg := range cfg.Observers {
+		if err := registry.ObserverRegistry().Register(observerCfg.Name, observer_parser.ParseObserver(observerCfg)); err != nil {
+			return err
+		}
+	}
+
+	for name := range registry.RecorderRegistry().GetAll() {
+		registry.RecorderRegistry().Unregister(name)
+	}
+	for _, recorderCfg := range cfg.Recorders {
+		if err := registry.RecorderRegistry().Register(recorderCfg.Name, recorder_parser.ParseRecorder(recorderCfg)); err != nil {
+			return err
+		}
+	}
+
+	for name := range registry.TrafficLimiterRegistry().GetAll() {
+		registry.TrafficLimiterRegistry().Unregister(name)
+	}
+	for _, limiterCfg := range cfg.Limiters {
+		if err := registry.TrafficLimiterRegistry().Register(limiterCfg.Name, limiter_parser.ParseTrafficLimiter(limiterCfg)); err != nil {
+			return err
+		}
+	}
+
+	for name := range registry.ConnLimiterRegistry().GetAll() {
+		registry.ConnLimiterRegistry().Unregister(name)
+	}
+	for _, limiterCfg := range cfg.CLimiters {
+		if err := registry.ConnLimiterRegistry().Register(limiterCfg.Name, limiter_parser.ParseConnLimiter(limiterCfg)); err != nil {
+			return err
+		}
+	}
+
+	for name := range registry.RateLimiterRegistry().GetAll() {
+		registry.RateLimiterRegistry().Unregister(name)
+	}
+	for _, limiterCfg := range cfg.RLimiters {
+		if err := registry.RateLimiterRegistry().Register(limiterCfg.Name, limiter_parser.ParseRateLimiter(limiterCfg)); err != nil {
+			return err
+		}
+	}
+
+	for name := range registry.HopRegistry().GetAll() {
+		registry.HopRegistry().Unregister(name)
+	}
+	for _, hopCfg := range cfg.Hops {
+		hop, err := hop_parser.ParseHop(hopCfg, logger.Default())
+		if err != nil {
+			return err
+		}
+		if err := registry.HopRegistry().Register(hopCfg.Name, hop); err != nil {
+			return err
+		}
+	}
+
+	for name := range registry.ChainRegistry().GetAll() {
+		registry.ChainRegistry().Unregister(name)
+	}
+	for _, chainCfg := range cfg.Chains {
+		c, err := chain_parser.ParseChain(chainCfg, logger.Default())
+		if err != nil {
+			return err
+		}
+		if err := registry.ChainRegistry().Register(chainCfg.Name, c); err != nil {
+			return err
+		}
+	}
+
+	for name := range registry.ServiceRegistry().GetAll() {
+		registry.ServiceRegistry().Unregister(name)
+	}
+	for _, svcCfg := range cfg.Services {
+		svc, err := service_parser.ParseService(svcCfg)
+		if err != nil {
+			return err
+		}
+		if svc != nil {
+			if err := registry.ServiceRegistry().Register(svcCfg.Name, svc); err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}

config/parsing/parser/parser.go

@@ -0,0 +1,206 @@
+package parser
+
+import (
+	"encoding/json"
+	"os"
+	"strings"
+
+	"github.com/go-gost/core/logger"
+	"github.com/go-gost/x/config"
+	"github.com/go-gost/x/config/cmd"
+	xmd "github.com/go-gost/x/metadata"
+	mdutil "github.com/go-gost/x/metadata/util"
+)
+
+var (
+	defaultParser = &parser{}
+)
+
+func Init(args Args) {
+	defaultParser = &parser{
+		args: args,
+	}
+}
+
+func Parse() (*config.Config, error) {
+	return defaultParser.Parse()
+}
+
+type Args struct {
+	CfgFile     string
+	Services    []string
+	Nodes       []string
+	Debug       bool
+	Trace       bool
+	ApiAddr     string
+	MetricsAddr string
+}
+
+type parser struct {
+	args Args
+}
+
+func (p *parser) Parse() (*config.Config, error) {
+	cfg := &config.Config{}
+
+	cfgFile := p.args.CfgFile
+	if cfgFile != "" {
+		cfgFile = strings.TrimSpace(cfgFile)
+		if strings.HasPrefix(cfgFile, "{") && strings.HasSuffix(cfgFile, "}") {
+			if err := json.Unmarshal([]byte(cfgFile), cfg); err != nil {
+				return nil, err
+			}
+		} else {
+			if err := cfg.ReadFile(cfgFile); err != nil {
+				return nil, err
+			}
+		}
+	}
+
+	cmdCfg, err := cmd.BuildConfigFromCmd(p.args.Services, p.args.Nodes)
+	if err != nil {
+		return nil, err
+	}
+	cfg = mergeConfig(cfg, cmdCfg)
+
+	if len(cfg.Services) == 0 && p.args.ApiAddr == "" && cfg.API == nil {
+		if err := cfg.Load(); err != nil {
+			return nil, err
+		}
+	}
+
+	if v := os.Getenv("GOST_LOGGER_LEVEL"); v != "" {
+		cfg.Log = &config.LogConfig{
+			Level: v,
+		}
+	}
+	if v := os.Getenv("GOST_API"); v != "" {
+		cfg.API = &config.APIConfig{
+			Addr: v,
+		}
+	}
+	if v := os.Getenv("GOST_METRICS"); v != "" {
+		cfg.Metrics = &config.MetricsConfig{
+			Addr: v,
+		}
+	}
+	if v := os.Getenv("GOST_PROFILING"); v != "" {
+		cfg.Profiling = &config.ProfilingConfig{
+			Addr: v,
+		}
+	}
+
+	if p.args.Debug || p.args.Trace {
+		if cfg.Log == nil {
+			cfg.Log = &config.LogConfig{}
+		}
+
+		cfg.Log.Level = string(logger.DebugLevel)
+		if p.args.Trace {
+			cfg.Log.Level = string(logger.TraceLevel)
+		}
+	}
+
+	if p.args.ApiAddr != "" {
+		cfg.API = &config.APIConfig{
+			Addr: p.args.ApiAddr,
+		}
+		if url, _ := cmd.Norm(p.args.ApiAddr); url != nil {
+			cfg.API.Addr = url.Host
+			if url.User != nil {
+				username := url.User.Username()
+				password, _ := url.User.Password()
+				cfg.API.Auth = &config.AuthConfig{
+					Username: username,
+					Password: password,
+				}
+			}
+			m := map[string]any{}
+			for k, v := range url.Query() {
+				if len(v) > 0 {
+					m[k] = v[0]
+				}
+			}
+			md := xmd.NewMetadata(m)
+			cfg.API.PathPrefix = mdutil.GetString(md, "pathPrefix")
+			cfg.API.AccessLog = mdutil.GetBool(md, "accesslog")
+		}
+	}
+	if p.args.MetricsAddr != "" {
+		cfg.Metrics = &config.MetricsConfig{
+			Addr: p.args.MetricsAddr,
+		}
+		if url, _ := cmd.Norm(p.args.MetricsAddr); url != nil {
+			cfg.Metrics.Addr = url.Host
+			if url.User != nil {
+				username := url.User.Username()
+				password, _ := url.User.Password()
+				cfg.Metrics.Auth = &config.AuthConfig{
+					Username: username,
+					Password: password,
+				}
+			}
+			m := map[string]any{}
+			for k, v := range url.Query() {
+				if len(v) > 0 {
+					m[k] = v[0]
+				}
+			}
+			md := xmd.NewMetadata(m)
+			cfg.Metrics.Path = mdutil.GetString(md, "path")
+		}
+	}
+
+	return cfg, nil
+}
+
+func mergeConfig(cfg1, cfg2 *config.Config) *config.Config {
+	if cfg1 == nil {
+		return cfg2
+	}
+	if cfg2 == nil {
+		return cfg1
+	}
+
+	cfg := &config.Config{
+		Services:   append(cfg1.Services, cfg2.Services...),
+		Chains:     append(cfg1.Chains, cfg2.Chains...),
+		Hops:       append(cfg1.Hops, cfg2.Hops...),
+		Authers:    append(cfg1.Authers, cfg2.Authers...),
+		Admissions: append(cfg1.Admissions, cfg2.Admissions...),
+		Bypasses:   append(cfg1.Bypasses, cfg2.Bypasses...),
+		Resolvers:  append(cfg1.Resolvers, cfg2.Resolvers...),
+		Hosts:      append(cfg1.Hosts, cfg2.Hosts...),
+		Ingresses:  append(cfg1.Ingresses, cfg2.Ingresses...),
+		SDs:        append(cfg1.SDs, cfg2.SDs...),
+		Recorders:  append(cfg1.Recorders, cfg2.Recorders...),
+		Limiters:   append(cfg1.Limiters, cfg2.Limiters...),
+		CLimiters:  append(cfg1.CLimiters, cfg2.CLimiters...),
+		RLimiters:  append(cfg1.RLimiters, cfg2.RLimiters...),
+		Loggers:    append(cfg1.Loggers, cfg2.Loggers...),
+		Routers:    append(cfg1.Routers, cfg2.Routers...),
+		Observers:  append(cfg1.Observers, cfg2.Observers...),
+		TLS:        cfg1.TLS,
+		Log:        cfg1.Log,
+		API:        cfg1.API,
+		Metrics:    cfg1.Metrics,
+		Profiling:  cfg1.Profiling,
+	}
+	if cfg2.TLS != nil {
+		cfg.TLS = cfg2.TLS
+	}
+	if cfg2.Log != nil {
+		cfg.Log = cfg2.Log
+	}
+	if cfg2.API != nil {
+		cfg.API = cfg2.API
+	}
+	if cfg2.Metrics != nil {
+		cfg.Metrics = cfg2.Metrics
+	}
+	if cfg2.Profiling != nil {
+		cfg.Profiling = cfg2.Profiling
+	}
+
+	return cfg
+}

handler/api/handler.go

@@ -0,0 +1,90 @@
+package api
+
+import (
+	"context"
+	"net"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/go-gost/core/handler"
+	md "github.com/go-gost/core/metadata"
+	"github.com/go-gost/x/api"
+	"github.com/go-gost/x/registry"
+)
+
+func init() {
+	registry.HandlerRegistry().Register("api", NewHandler)
+}
+
+type apiHandler struct {
+	handler http.Handler
+	md      metadata
+	options handler.Options
+}
+
+func NewHandler(opts ...handler.Option) handler.Handler {
+	options := handler.Options{}
+	for _, opt := range opts {
+		opt(&options)
+	}
+
+	return &apiHandler{
+		options: options,
+	}
+}
+
+func (h *apiHandler) Init(md md.Metadata) (err error) {
+	if err = h.parseMetadata(md); err != nil {
+		return
+	}
+
+	gin.SetMode(gin.ReleaseMode)
+
+	r := gin.New()
+	api.Register(r, &api.Options{
+		AccessLog:  h.md.accesslog,
+		PathPrefix: h.md.pathPrefix,
+		Auther:     h.options.Auther,
+	})
+	h.handler = r
+
+	return
+}
+
+func (h *apiHandler) Handle(ctx context.Context, conn net.Conn, opts ...handler.HandleOption) error {
+	l := &singleConnListener{
+		conn: make(chan net.Conn, 1),
+	}
+	l.send(conn)
+
+	s := http.Server{
+		Handler: h.handler,
+	}
+	s.Serve(l)
+
+	return s.Shutdown(ctx)
+}
+
+type singleConnListener struct {
+	conn chan net.Conn
+}
+
+func (l *singleConnListener) Accept() (net.Conn, error) {
+	if conn, ok := <-l.conn; ok {
+		return conn, nil
+	}
+	return nil, net.ErrClosed
+}
+
+func (l *singleConnListener) Close() error {
+	return nil
+}
+
+func (l *singleConnListener) Addr() net.Addr {
+	return &net.TCPAddr{}
+}
+
+func (l *singleConnListener) send(conn net.Conn) {
+	l.conn <- conn
+	close(l.conn)
+}

handler/api/metadata.go

@@ -0,0 +1,17 @@
+package api
+
+import (
+	mdata "github.com/go-gost/core/metadata"
+	mdutil "github.com/go-gost/x/metadata/util"
+)
+
+type metadata struct {
+	accesslog  bool
+	pathPrefix string
+}
+
+func (h *apiHandler) parseMetadata(md mdata.Metadata) (err error) {
+	h.md.accesslog = mdutil.GetBool(md, "api.accessLog", "accessLog")
+	h.md.pathPrefix = mdutil.GetString(md, "api.pathPrefix", "pathPrefix")
+	return
+}

handler/metrics/handler.go

@@ -1,10 +1,9 @@
-package file
+package metrics
 
 import (
 	"context"
 	"net"
 	"net/http"
-	"sync"
 	"time"
 
 	"github.com/go-gost/core/handler"
@@ -20,8 +19,7 @@ func init() {
 
 type metricsHandler struct {
 	handler http.Handler
-	server  *http.Server
+	mux     *http.ServeMux
-	ln      *singleConnListener
 	md      metadata
 	options handler.Options
 }
@@ -42,32 +40,33 @@ func (h *metricsHandler) Init(md md.Metadata) (err error) {
 		return
 	}
 
-	xmetrics.Init(xmetrics.NewMetrics())
+	xmetrics.Enable(true)
+
 	h.handler = promhttp.Handler()
 
 	mux := http.NewServeMux()
 	mux.Handle(h.md.path, http.HandlerFunc(h.handleFunc))
-	h.server = &http.Server{
+	h.mux = mux
-		Handler: mux,
-	}
-
-	h.ln = &singleConnListener{
-		conn: make(chan net.Conn),
-		done: make(chan struct{}),
-	}
-	go h.server.Serve(h.ln)
 
 	return
 }
 
 func (h *metricsHandler) Handle(ctx context.Context, conn net.Conn, opts ...handler.HandleOption) error {
-	h.ln.send(conn)
+	l := &singleConnListener{
+		conn: make(chan net.Conn, 1),
+	}
+	l.send(conn)
 
-	return nil
+	s := http.Server{
+		Handler: h.mux,
+	}
+	s.Serve(l)
+
+	return s.Shutdown(ctx)
 }
 
 func (h *metricsHandler) Close() error {
-	return h.server.Close()
+	return nil
 }
 
 func (h *metricsHandler) handleFunc(w http.ResponseWriter, r *http.Request) {
@@ -88,47 +87,29 @@ func (h *metricsHandler) handleFunc(w http.ResponseWriter, r *http.Request) {
 		"remote":   r.RemoteAddr,
 		"duration": time.Since(start),
 	})
-	log.Debugf("%s %s", r.Method, r.RequestURI)
+	log.Infof("%s %s", r.Method, r.RequestURI)
 }
 
 type singleConnListener struct {
 	conn chan net.Conn
-	addr net.Addr
-	done chan struct{}
-	mu   sync.Mutex
 }
 
 func (l *singleConnListener) Accept() (net.Conn, error) {
-	select {
+	if conn, ok := <-l.conn; ok {
-	case conn := <-l.conn:
 		return conn, nil
-
-	case <-l.done:
-		return nil, net.ErrClosed
 	}
+	return nil, net.ErrClosed
 }
 
 func (l *singleConnListener) Close() error {
-	l.mu.Lock()
-	defer l.mu.Unlock()
-
-	select {
-	case <-l.done:
-	default:
-		close(l.done)
-	}
-
 	return nil
 }
 
 func (l *singleConnListener) Addr() net.Addr {
-	return l.addr
+	return &net.TCPAddr{}
 }
 
 func (l *singleConnListener) send(conn net.Conn) {
-	select {
+	l.conn <- conn
-	case l.conn <- conn:
+	close(l.conn)
-	case <-l.done:
-		return
-	}
 }

handler/metrics/metadata.go

@@ -1,4 +1,4 @@
-package file
+package metrics
 
 import (
 	mdata "github.com/go-gost/core/metadata"

metrics/metrics.go

@@ -1,6 +1,10 @@
 package metrics
 
-import "github.com/go-gost/core/metrics"
+import (
+	"sync/atomic"
+
+	"github.com/go-gost/core/metrics"
+)
 
 const (
 	// Number of services. Labels: host.
@@ -24,29 +28,35 @@ const (
 )
 
 var (
-	global metrics.Metrics = Noop()
+	defaultMetrics metrics.Metrics = NewMetrics()
+	enabled atomic.Bool
 )
 
-func Init(m metrics.Metrics) {
+func Enable(b bool) {
-	if m != nil {
+	enabled.Store(b)
-		global = m
-	} else {
-		global = Noop()
-	}
 }
 
 func IsEnabled() bool {
-	return global != Noop()
+	return enabled.Load()
 }
 
 func GetCounter(name metrics.MetricName, labels metrics.Labels) metrics.Counter {
-	return global.Counter(name, labels)
+	if IsEnabled() {
+		return defaultMetrics.Counter(name, labels)
+	}
+	return noop.Counter(name, labels)
 }
 
 func GetGauge(name metrics.MetricName, labels metrics.Labels) metrics.Gauge {
-	return global.Gauge(name, labels)
+	if IsEnabled() {
+		return defaultMetrics.Gauge(name, labels)
+	}
+	return noop.Gauge(name, labels)
 }
 
 func GetObserver(name metrics.MetricName, labels metrics.Labels) metrics.Observer {
-	return global.Observer(name, labels)
+	if IsEnabled() {
+		return defaultMetrics.Observer(name, labels)
+	}
+	return noop.Observer(name, labels)
 }