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authorSebastien Douheret <sebastien.douheret@iot.bzh>2017-09-25 14:15:16 +0200
committerSebastien Douheret <sebastien.douheret@iot.bzh>2017-10-06 18:25:04 +0200
commit97ca1f277dc8b6973d6fa67add5593a9c395ce60 (patch)
tree761649d7771e8699a67567476c17fb2fa0e28e57 /lib/webserver/server.go
parent12a20d0905b0d3e7e0f4c9ec8ee619f683256d71 (diff)
Added webapp Dashboard + logic to interact with server.
Signed-off-by: Sebastien Douheret <sebastien.douheret@iot.bzh>
Diffstat (limited to 'lib/webserver/server.go')
-rw-r--r--lib/webserver/server.go226
1 files changed, 0 insertions, 226 deletions
diff --git a/lib/webserver/server.go b/lib/webserver/server.go
deleted file mode 100644
index b835a65..0000000
--- a/lib/webserver/server.go
+++ /dev/null
@@ -1,226 +0,0 @@
-package webserver
-
-import (
- "fmt"
- "net/http"
- "strings"
-
- "github.com/Sirupsen/logrus"
- "github.com/gin-gonic/gin"
- "github.com/googollee/go-socket.io"
- "github.com/iotbzh/xds-agent/lib/apiv1"
- "github.com/iotbzh/xds-agent/lib/session"
- "github.com/iotbzh/xds-agent/lib/xdsconfig"
-)
-
-// ServerService .
-type ServerService struct {
- router *gin.Engine
- api *apiv1.APIService
- sIOServer *socketio.Server
- webApp *gin.RouterGroup
- cfg *xdsconfig.Config
- sessions *session.Sessions
- log *logrus.Logger
- stop chan struct{} // signals intentional stop
-}
-
-const indexFilename = "index.html"
-const cookieMaxAge = "3600"
-
-// New creates an instance of ServerService
-func New(conf *xdsconfig.Config, log *logrus.Logger) *ServerService {
-
- // Setup logging for gin router
- if log.Level == logrus.DebugLevel {
- gin.SetMode(gin.DebugMode)
- } else {
- gin.SetMode(gin.ReleaseMode)
- }
-
- // TODO
- // - try to bind gin DefaultWriter & DefaultErrorWriter to logrus logger
- // - try to fix pb about isTerminal=false when out is in VSC Debug Console
- //gin.DefaultWriter = ??
- //gin.DefaultErrorWriter = ??
-
- // Creates gin router
- r := gin.New()
-
- svr := &ServerService{
- router: r,
- api: nil,
- sIOServer: nil,
- webApp: nil,
- cfg: conf,
- log: log,
- sessions: nil,
- stop: make(chan struct{}),
- }
-
- return svr
-}
-
-// Serve starts a new instance of the Web Server
-func (s *ServerService) Serve() error {
- var err error
-
- // Setup middlewares
- s.router.Use(gin.Logger())
- s.router.Use(gin.Recovery())
- s.router.Use(s.middlewareCORS())
- s.router.Use(s.middlewareXDSDetails())
- s.router.Use(s.middlewareCSRF())
-
- // Sessions manager
- s.sessions = session.NewClientSessions(s.router, s.log, cookieMaxAge)
-
- s.router.GET("", s.slashHandler)
-
- // Create REST API
- s.api = apiv1.New(s.sessions, s.cfg, s.log, s.router)
-
- // Websocket routes
- s.sIOServer, err = socketio.NewServer(nil)
- if err != nil {
- s.log.Fatalln(err)
- }
-
- s.router.GET("/socket.io/", s.socketHandler)
- s.router.POST("/socket.io/", s.socketHandler)
- /* TODO: do we want to support ws://... ?
- s.router.Handle("WS", "/socket.io/", s.socketHandler)
- s.router.Handle("WSS", "/socket.io/", s.socketHandler)
- */
-
- // Serve in the background
- serveError := make(chan error, 1)
- go func() {
- fmt.Printf("Web Server running on localhost:%s ...\n", s.cfg.HTTPPort)
- serveError <- http.ListenAndServe(":"+s.cfg.HTTPPort, s.router)
- }()
-
- fmt.Printf("XDS agent running...\n")
-
- // Wait for stop, restart or error signals
- select {
- case <-s.stop:
- // Shutting down permanently
- s.sessions.Stop()
- s.log.Infoln("shutting down (stop)")
- case err = <-serveError:
- // Error due to listen/serve failure
- s.log.Errorln(err)
- }
-
- return nil
-}
-
-// Stop web server
-func (s *ServerService) Stop() {
- close(s.stop)
-}
-
-// serveSlash provides response to GET "/"
-func (s *ServerService) slashHandler(c *gin.Context) {
- c.String(200, "Hello from XDS agent!")
-}
-
-// Add details in Header
-func (s *ServerService) middlewareXDSDetails() gin.HandlerFunc {
- return func(c *gin.Context) {
- c.Header("XDS-Agent-Version", s.cfg.Version)
- c.Header("XDS-API-Version", s.cfg.APIVersion)
- c.Next()
- }
-}
-
-func (s *ServerService) isValidAPIKey(key string) bool {
- return (key == s.cfg.FileConf.XDSAPIKey && key != "")
-}
-
-func (s *ServerService) middlewareCSRF() gin.HandlerFunc {
- return func(c *gin.Context) {
- // Allow requests carrying a valid API key
- if s.isValidAPIKey(c.Request.Header.Get("X-API-Key")) {
- // Set the access-control-allow-origin header for CORS requests
- // since a valid API key has been provided
- c.Header("Access-Control-Allow-Origin", "*")
- c.Next()
- return
- }
-
- // Allow io.socket request
- if strings.HasPrefix(c.Request.URL.Path, "/socket.io") {
- c.Next()
- return
- }
-
- /* FIXME Add really CSRF support
-
- // Allow requests for anything not under the protected path prefix,
- // and set a CSRF cookie if there isn't already a valid one.
- if !strings.HasPrefix(c.Request.URL.Path, prefix) {
- cookie, err := c.Cookie("CSRF-Token-" + unique)
- if err != nil || !validCsrfToken(cookie.Value) {
- s.log.Debugln("new CSRF cookie in response to request for", c.Request.URL)
- c.SetCookie("CSRF-Token-"+unique, newCsrfToken(), 600, "/", "", false, false)
- }
- c.Next()
- return
- }
-
- // Verify the CSRF token
- token := c.Request.Header.Get("X-CSRF-Token-" + unique)
- if !validCsrfToken(token) {
- c.AbortWithError(403, "CSRF Error")
- return
- }
-
- c.Next()
- */
- c.AbortWithError(403, fmt.Errorf("Not valid API key"))
- }
-}
-
-// CORS middleware
-func (s *ServerService) middlewareCORS() gin.HandlerFunc {
- return func(c *gin.Context) {
- if c.Request.Method == "OPTIONS" {
- c.Header("Access-Control-Allow-Origin", "*")
- c.Header("Access-Control-Allow-Headers", "Content-Type, X-API-Key")
- c.Header("Access-Control-Allow-Methods", "GET, POST, DELETE")
- c.Header("Access-Control-Max-Age", cookieMaxAge)
- c.AbortWithStatus(204)
- return
- }
- c.Next()
- }
-}
-
-// socketHandler is the handler for the "main" websocket connection
-func (s *ServerService) socketHandler(c *gin.Context) {
-
- // Retrieve user session
- sess := s.sessions.Get(c)
- if sess == nil {
- c.JSON(500, gin.H{"error": "Cannot retrieve session"})
- return
- }
-
- s.sIOServer.On("connection", func(so socketio.Socket) {
- s.log.Debugf("WS Connected (SID=%v)", so.Id())
- s.sessions.UpdateIOSocket(sess.ID, &so)
-
- so.On("disconnection", func() {
- s.log.Debugf("WS disconnected (SID=%v)", so.Id())
- s.sessions.UpdateIOSocket(sess.ID, nil)
- })
- })
-
- s.sIOServer.On("error", func(so socketio.Socket, err error) {
- s.log.Errorf("WS SID=%v Error : %v", so.Id(), err.Error())
- })
-
- s.sIOServer.ServeHTTP(c.Writer, c.Request)
-}