11 "github.com/Sirupsen/logrus"
12 "github.com/gin-contrib/static"
13 "github.com/gin-gonic/gin"
14 "github.com/googollee/go-socket.io"
15 "github.com/iotbzh/xds-server/lib/apiv1"
16 "github.com/iotbzh/xds-server/lib/crosssdk"
17 "github.com/iotbzh/xds-server/lib/model"
18 "github.com/iotbzh/xds-server/lib/session"
19 "github.com/iotbzh/xds-server/lib/xdsconfig"
26 sIOServer *socketio.Server
27 webApp *gin.RouterGroup
29 sessions *session.Sessions
30 mfolders *model.Folders
33 stop chan struct{} // signals intentional stop
36 const indexFilename = "index.html"
37 const cookieMaxAge = "3600"
39 // New creates an instance of Server
40 func New(cfg *xdsconfig.Config, mfolders *model.Folders, sdks *crosssdk.SDKs, logr *logrus.Logger) *Server {
42 // Setup logging for gin router
43 if logr.Level == logrus.DebugLevel {
44 gin.SetMode(gin.DebugMode)
46 gin.SetMode(gin.ReleaseMode)
49 // Redirect gin logs into logrus logger
50 gin.DefaultWriter = logr.Out
51 gin.DefaultErrorWriter = logr.Out
52 log.SetOutput(logr.Out)
54 // FIXME - fix pb about isTerminal=false when out is in VSC Debug Console
69 stop: make(chan struct{}),
75 // Serve starts a new instance of the Web Server
76 func (s *Server) Serve() error {
80 s.router.Use(gin.Logger())
81 s.router.Use(gin.Recovery())
82 s.router.Use(s.middlewareXDSDetails())
83 s.router.Use(s.middlewareCORS())
86 s.sessions = session.NewClientSessions(s.router, s.log, cookieMaxAge)
89 s.api = apiv1.New(s.router, s.sessions, s.cfg, s.mfolders, s.sdks)
92 s.sIOServer, err = socketio.NewServer(nil)
97 s.router.GET("/socket.io/", s.socketHandler)
98 s.router.POST("/socket.io/", s.socketHandler)
99 /* TODO: do we want to support ws://... ?
100 s.router.Handle("WS", "/socket.io/", s.socketHandler)
101 s.router.Handle("WSS", "/socket.io/", s.socketHandler)
104 // Web Application (serve on / )
105 idxFile := path.Join(s.cfg.FileConf.WebAppDir, indexFilename)
106 if _, err := os.Stat(idxFile); err != nil {
107 s.log.Fatalln("Web app directory not found, check/use webAppDir setting in config file: ", idxFile)
109 s.log.Infof("Serve WEB app dir: %s", s.cfg.FileConf.WebAppDir)
110 s.router.Use(static.Serve("/", static.LocalFile(s.cfg.FileConf.WebAppDir, true)))
111 s.webApp = s.router.Group("/", s.serveIndexFile)
116 // Serve in the background
117 serveError := make(chan error, 1)
119 fmt.Printf("Web Server running on localhost:%s ...\n", s.cfg.FileConf.HTTPPort)
120 serveError <- http.ListenAndServe(":"+s.cfg.FileConf.HTTPPort, s.router)
123 // Wait for stop, restart or error signals
126 // Shutting down permanently
128 s.log.Infoln("shutting down (stop)")
129 case err = <-serveError:
130 // Error due to listen/serve failure
138 func (s *Server) Stop() {
142 // serveIndexFile provides initial file (eg. index.html) of webapp
143 func (s *Server) serveIndexFile(c *gin.Context) {
144 c.HTML(200, indexFilename, gin.H{})
147 // Add details in Header
148 func (s *Server) middlewareXDSDetails() gin.HandlerFunc {
149 return func(c *gin.Context) {
150 c.Header("XDS-Version", s.cfg.Version)
151 c.Header("XDS-API-Version", s.cfg.APIVersion)
157 func (s *Server) middlewareCORS() gin.HandlerFunc {
158 return func(c *gin.Context) {
159 if c.Request.Method == "OPTIONS" {
160 c.Header("Access-Control-Allow-Origin", "*")
161 c.Header("Access-Control-Allow-Headers", "Content-Type")
162 c.Header("Access-Control-Allow-Methods", "GET, POST, DELETE")
163 c.Header("Access-Control-Max-Age", cookieMaxAge)
164 c.AbortWithStatus(204)
172 // socketHandler is the handler for the "main" websocket connection
173 func (s *Server) socketHandler(c *gin.Context) {
175 // Retrieve user session
176 sess := s.sessions.Get(c)
178 c.JSON(500, gin.H{"error": "Cannot retrieve session"})
182 s.sIOServer.On("connection", func(so socketio.Socket) {
183 s.log.Debugf("WS Connected (SID=%v)", so.Id())
184 s.sessions.UpdateIOSocket(sess.ID, &so)
186 so.On("disconnection", func() {
187 s.log.Debugf("WS disconnected (SID=%v)", so.Id())
188 s.sessions.UpdateIOSocket(sess.ID, nil)
192 s.sIOServer.On("error", func(so socketio.Socket, err error) {
193 s.log.Errorf("WS SID=%v Error : %v", so.Id(), err.Error())
196 s.sIOServer.ServeHTTP(c.Writer, c.Request)