sing-box/experimental/clashapi/server.go

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package clashapi
import (
"bytes"
"context"
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"errors"
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"net"
"net/http"
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"os"
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"strings"
"time"
"github.com/sagernet/sing-box/adapter"
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"github.com/sagernet/sing-box/common/json"
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"github.com/sagernet/sing-box/common/urltest"
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C "github.com/sagernet/sing-box/constant"
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"github.com/sagernet/sing-box/experimental/clashapi/trafficontrol"
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"github.com/sagernet/sing-box/log"
"github.com/sagernet/sing-box/option"
E "github.com/sagernet/sing/common/exceptions"
F "github.com/sagernet/sing/common/format"
N "github.com/sagernet/sing/common/network"
"github.com/go-chi/chi/v5"
"github.com/go-chi/cors"
"github.com/go-chi/render"
"github.com/gorilla/websocket"
)
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var _ adapter.ClashServer = (*Server)(nil)
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type Server struct {
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router adapter.Router
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logger log.Logger
httpServer *http.Server
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trafficManager *trafficontrol.Manager
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urlTestHistory *urltest.HistoryStorage
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}
func NewServer(router adapter.Router, logFactory log.ObservableFactory, options option.ClashAPIOptions) *Server {
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trafficManager := trafficontrol.NewManager()
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chiRouter := chi.NewRouter()
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server := &Server{
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router,
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logFactory.NewLogger("clash-api"),
&http.Server{
Addr: options.ExternalController,
Handler: chiRouter,
},
trafficManager,
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urltest.NewHistoryStorage(),
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}
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cors := cors.New(cors.Options{
AllowedOrigins: []string{"*"},
AllowedMethods: []string{"GET", "POST", "PUT", "PATCH", "DELETE"},
AllowedHeaders: []string{"Content-Type", "Authorization"},
MaxAge: 300,
})
chiRouter.Use(cors.Handler)
chiRouter.Group(func(r chi.Router) {
r.Use(authentication(options.Secret))
r.Get("/", hello)
r.Get("/logs", getLogs(logFactory))
r.Get("/traffic", traffic(trafficManager))
r.Get("/version", version)
r.Mount("/configs", configRouter(logFactory))
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r.Mount("/proxies", proxyRouter(server, router))
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r.Mount("/rules", ruleRouter(router))
r.Mount("/connections", connectionRouter(trafficManager))
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r.Mount("/providers/proxies", proxyProviderRouter())
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r.Mount("/providers/rules", ruleProviderRouter())
r.Mount("/script", scriptRouter())
r.Mount("/profile", profileRouter())
r.Mount("/cache", cacheRouter())
})
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if options.ExternalUI != "" {
chiRouter.Group(func(r chi.Router) {
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fs := http.StripPrefix("/ui", http.FileServer(http.Dir(os.ExpandEnv(options.ExternalUI))))
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r.Get("/ui", http.RedirectHandler("/ui/", http.StatusTemporaryRedirect).ServeHTTP)
r.Get("/ui/*", func(w http.ResponseWriter, r *http.Request) {
fs.ServeHTTP(w, r)
})
})
}
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return server
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}
func (s *Server) Start() error {
listener, err := net.Listen("tcp", s.httpServer.Addr)
if err != nil {
return E.Cause(err, "external controller listen error")
}
s.logger.Info("restful api listening at ", listener.Addr())
go func() {
err = s.httpServer.Serve(listener)
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if err != nil && !errors.Is(err, http.ErrServerClosed) {
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s.logger.Error("external controller serve error: ", err)
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}
}()
return nil
}
func (s *Server) Close() error {
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s.httpServer.Close()
s.trafficManager.Close()
return nil
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}
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func (s *Server) RoutedConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext, matchedRule adapter.Rule) (net.Conn, adapter.Tracker) {
tracker := trafficontrol.NewTCPTracker(conn, s.trafficManager, castMetadata(metadata), s.router, matchedRule)
return tracker, tracker
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}
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func (s *Server) RoutedPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext, matchedRule adapter.Rule) (N.PacketConn, adapter.Tracker) {
tracker := trafficontrol.NewUDPTracker(conn, s.trafficManager, castMetadata(metadata), s.router, matchedRule)
return tracker, tracker
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}
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func castMetadata(metadata adapter.InboundContext) trafficontrol.Metadata {
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var inbound string
if metadata.Inbound != "" {
inbound = metadata.InboundType + "/" + metadata.Inbound
} else {
inbound = metadata.InboundType
}
var domain string
if metadata.Domain != "" {
domain = metadata.Domain
} else {
domain = metadata.Destination.Fqdn
}
var processPath string
if metadata.ProcessInfo != nil {
if metadata.ProcessInfo.ProcessPath != "" {
processPath = metadata.ProcessInfo.ProcessPath
} else if metadata.ProcessInfo.PackageName != "" {
processPath = metadata.ProcessInfo.PackageName
}
if processPath == "" {
if metadata.ProcessInfo.UserId != -1 {
processPath = F.ToString(metadata.ProcessInfo.UserId)
}
} else if metadata.ProcessInfo.User != "" {
processPath = F.ToString(processPath, " (", metadata.ProcessInfo.User, ")")
} else if metadata.ProcessInfo.UserId != -1 {
processPath = F.ToString(processPath, " (", metadata.ProcessInfo.UserId, ")")
}
}
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return trafficontrol.Metadata{
NetWork: metadata.Network,
Type: inbound,
SrcIP: metadata.Source.Addr,
DstIP: metadata.Destination.Addr,
SrcPort: F.ToString(metadata.Source.Port),
DstPort: F.ToString(metadata.Destination.Port),
Host: domain,
DNSMode: "normal",
ProcessPath: processPath,
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}
}
func authentication(serverSecret string) func(next http.Handler) http.Handler {
return func(next http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
if serverSecret == "" {
next.ServeHTTP(w, r)
return
}
// Browser websocket not support custom header
if websocket.IsWebSocketUpgrade(r) && r.URL.Query().Get("token") != "" {
token := r.URL.Query().Get("token")
if token != serverSecret {
render.Status(r, http.StatusUnauthorized)
render.JSON(w, r, ErrUnauthorized)
return
}
next.ServeHTTP(w, r)
return
}
header := r.Header.Get("Authorization")
bearer, token, found := strings.Cut(header, " ")
hasInvalidHeader := bearer != "Bearer"
hasInvalidSecret := !found || token != serverSecret
if hasInvalidHeader || hasInvalidSecret {
render.Status(r, http.StatusUnauthorized)
render.JSON(w, r, ErrUnauthorized)
return
}
next.ServeHTTP(w, r)
}
return http.HandlerFunc(fn)
}
}
func hello(w http.ResponseWriter, r *http.Request) {
render.JSON(w, r, render.M{"hello": "clash"})
}
var upgrader = websocket.Upgrader{
CheckOrigin: func(r *http.Request) bool {
return true
},
}
type Traffic struct {
Up int64 `json:"up"`
Down int64 `json:"down"`
}
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func traffic(trafficManager *trafficontrol.Manager) func(w http.ResponseWriter, r *http.Request) {
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return func(w http.ResponseWriter, r *http.Request) {
var wsConn *websocket.Conn
if websocket.IsWebSocketUpgrade(r) {
var err error
wsConn, err = upgrader.Upgrade(w, r, nil)
if err != nil {
return
}
}
if wsConn == nil {
w.Header().Set("Content-Type", "application/json")
render.Status(r, http.StatusOK)
}
tick := time.NewTicker(time.Second)
defer tick.Stop()
buf := &bytes.Buffer{}
var err error
for range tick.C {
buf.Reset()
up, down := trafficManager.Now()
if err := json.NewEncoder(buf).Encode(Traffic{
Up: up,
Down: down,
}); err != nil {
break
}
if wsConn == nil {
_, err = w.Write(buf.Bytes())
w.(http.Flusher).Flush()
} else {
err = wsConn.WriteMessage(websocket.TextMessage, buf.Bytes())
}
if err != nil {
break
}
}
}
}
type Log struct {
Type string `json:"type"`
Payload string `json:"payload"`
}
func getLogs(logFactory log.ObservableFactory) func(w http.ResponseWriter, r *http.Request) {
return func(w http.ResponseWriter, r *http.Request) {
levelText := r.URL.Query().Get("level")
if levelText == "" {
levelText = "info"
}
level, ok := log.ParseLevel(levelText)
if ok != nil {
render.Status(r, http.StatusBadRequest)
render.JSON(w, r, ErrBadRequest)
return
}
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subscription, done, err := logFactory.Subscribe()
if err != nil {
render.Status(r, http.StatusNoContent)
return
}
defer logFactory.UnSubscribe(subscription)
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var wsConn *websocket.Conn
if websocket.IsWebSocketUpgrade(r) {
var err error
wsConn, err = upgrader.Upgrade(w, r, nil)
if err != nil {
return
}
}
if wsConn == nil {
w.Header().Set("Content-Type", "application/json")
render.Status(r, http.StatusOK)
}
buf := &bytes.Buffer{}
var logEntry log.Entry
for {
select {
case <-done:
return
case logEntry = <-subscription:
}
if logEntry.Level > level {
continue
}
buf.Reset()
err = json.NewEncoder(buf).Encode(Log{
Type: log.FormatLevel(logEntry.Level),
Payload: logEntry.Message,
})
if err != nil {
break
}
if wsConn == nil {
_, err = w.Write(buf.Bytes())
w.(http.Flusher).Flush()
} else {
err = wsConn.WriteMessage(websocket.TextMessage, buf.Bytes())
}
if err != nil {
break
}
}
}
}
func version(w http.ResponseWriter, r *http.Request) {
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render.JSON(w, r, render.M{"version": "sing-box " + C.Version, "premium": true})
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}