Move WebSocket API to it's own package and add websocket v4 endpoint (#5881)

api4/websocket.go

@@ -0,0 +1,46 @@
+// Copyright (c) 2017 Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package api4
+
+import (
+	"net/http"
+
+	l4g "github.com/alecthomas/log4go"
+	"github.com/gorilla/websocket"
+	"github.com/mattermost/platform/app"
+	"github.com/mattermost/platform/model"
+	"github.com/mattermost/platform/utils"
+)
+
+func InitWebSocket() {
+	l4g.Debug(utils.T("api.web_socket.init.debug"))
+
+	BaseRoutes.ApiRoot.Handle("/websocket", ApiHandlerTrustRequester(connectWebSocket)).Methods("GET")
+}
+
+func connectWebSocket(c *Context, w http.ResponseWriter, r *http.Request) {
+	originChecker := utils.GetOriginChecker(r)
+
+	upgrader := websocket.Upgrader{
+		ReadBufferSize:  model.SOCKET_MAX_MESSAGE_SIZE_KB,
+		WriteBufferSize: model.SOCKET_MAX_MESSAGE_SIZE_KB,
+		CheckOrigin:     originChecker,
+	}
+
+	ws, err := upgrader.Upgrade(w, r, nil)
+	if err != nil {
+		l4g.Error(utils.T("api.web_socket.connect.error"), err)
+		c.Err = model.NewLocAppError("connect", "api.web_socket.connect.upgrade.app_error", nil, "")
+		return
+	}
+
+	wc := app.NewWebConn(ws, c.Session, c.T, "")
+
+	if len(c.Session.UserId) > 0 {
+		app.HubRegister(wc)
+	}
+
+	go wc.WritePump()
+	wc.ReadPump()
+}