[feature] separate subscription service

Co-Authored-By: Alireza Ahmadi <alireza7@gmail.com>

sub/sub.go

@@ -0,0 +1,171 @@
+package sub
+
+import (
+	"context"
+	"crypto/tls"
+	"io"
+	"net"
+	"net/http"
+	"strconv"
+	"strings"
+	"x-ui/config"
+	"x-ui/logger"
+	"x-ui/util/common"
+	"x-ui/web/network"
+	"x-ui/web/service"
+
+	"github.com/gin-gonic/gin"
+)
+
+type Server struct {
+	httpServer *http.Server
+	listener   net.Listener
+
+	sub            *SUBController
+	settingService service.SettingService
+
+	ctx    context.Context
+	cancel context.CancelFunc
+}
+
+func NewServer() *Server {
+	ctx, cancel := context.WithCancel(context.Background())
+	return &Server{
+		ctx:    ctx,
+		cancel: cancel,
+	}
+}
+
+func (s *Server) initRouter() (*gin.Engine, error) {
+	if config.IsDebug() {
+		gin.SetMode(gin.DebugMode)
+	} else {
+		gin.DefaultWriter = io.Discard
+		gin.DefaultErrorWriter = io.Discard
+		gin.SetMode(gin.ReleaseMode)
+	}
+
+	engine := gin.Default()
+
+	subPath, err := s.settingService.GetSubPath()
+	if err != nil {
+		return nil, err
+	}
+
+	subDomain, err := s.settingService.GetSubDomain()
+	if err != nil {
+		return nil, err
+	}
+
+	if subDomain != "" {
+		validateDomain := func(c *gin.Context) {
+			host := strings.Split(c.Request.Host, ":")[0]
+
+			if host != subDomain {
+				c.AbortWithStatus(http.StatusForbidden)
+				return
+			}
+
+			c.Next()
+		}
+
+		engine.Use(validateDomain)
+	}
+
+	g := engine.Group(subPath)
+
+	s.sub = NewSUBController(g)
+
+	return engine, nil
+}
+
+func (s *Server) Start() (err error) {
+	//This is an anonymous function, no function name
+	defer func() {
+		if err != nil {
+			s.Stop()
+		}
+	}()
+
+	subEnable, err := s.settingService.GetSubEnable()
+	if err != nil {
+		return err
+	}
+	if !subEnable {
+		return nil
+	}
+
+	engine, err := s.initRouter()
+	if err != nil {
+		return err
+	}
+
+	certFile, err := s.settingService.GetSubCertFile()
+	if err != nil {
+		return err
+	}
+	keyFile, err := s.settingService.GetSubKeyFile()
+	if err != nil {
+		return err
+	}
+	listen, err := s.settingService.GetSubListen()
+	if err != nil {
+		return err
+	}
+	port, err := s.settingService.GetSubPort()
+	if err != nil {
+		return err
+	}
+	listenAddr := net.JoinHostPort(listen, strconv.Itoa(port))
+	listener, err := net.Listen("tcp", listenAddr)
+	if err != nil {
+		return err
+	}
+	if certFile != "" || keyFile != "" {
+		cert, err := tls.LoadX509KeyPair(certFile, keyFile)
+		if err != nil {
+			listener.Close()
+			return err
+		}
+		c := &tls.Config{
+			Certificates: []tls.Certificate{cert},
+		}
+		listener = network.NewAutoHttpsListener(listener)
+		listener = tls.NewListener(listener, c)
+	}
+
+	if certFile != "" || keyFile != "" {
+		logger.Info("Sub server run https on", listener.Addr())
+	} else {
+		logger.Info("Sub server run http on", listener.Addr())
+	}
+	s.listener = listener
+
+	s.httpServer = &http.Server{
+		Handler: engine,
+	}
+
+	go func() {
+		s.httpServer.Serve(listener)
+	}()
+
+	return nil
+}
+
+func (s *Server) Stop() error {
+	s.cancel()
+
+	var err1 error
+	var err2 error
+	if s.httpServer != nil {
+		err1 = s.httpServer.Shutdown(s.ctx)
+	}
+	if s.listener != nil {
+		err2 = s.listener.Close()
+	}
+	return common.Combine(err1, err2)
+}
+
+func (s *Server) GetCtx() context.Context {
+	return s.ctx
+}