Merge pull request #400 from thecodingmachine/fix/disconnect

FIX: the server now closes the socket after 30s of no pong

back/src/Controller/IoSocketController.ts

@@ -20,7 +20,7 @@ import {parse} from "query-string";
 import {jwtTokenManager} from "../Services/JWTTokenManager";
 import {adminApi, CharacterTexture, FetchMemberDataByUuidResponse} from "../Services/AdminApi";
 import {SocketManager, socketManager} from "../Services/SocketManager";
-import {emitInBatch, resetPing} from "../Services/IoSocketHelpers";
+import {emitInBatch, pongMaxInterval, refresLogoutTimerOnPong, resetPing} from "../Services/IoSocketHelpers";
 import {clientEventsEmitter} from "../Services/ClientEventsEmitter";
 import {ADMIN_API_TOKEN, ADMIN_API_URL} from "../Enum/EnvironmentVariable";
 
@@ -240,6 +240,7 @@ export class IoSocketController {
                 const client = this.initClient(ws); //todo: into the upgrade instead?
                 socketManager.handleJoinRoom(client);
                 resetPing(client);
+                refresLogoutTimerOnPong(ws as ExSocketInterface);
 
                 //get data information and show messages
                 if (ADMIN_API_URL) {
@@ -292,6 +293,9 @@ export class IoSocketController {
             drain: (ws) => {
                 console.log('WebSocket backpressure: ' + ws.getBufferedAmount());
             },
+            pong(ws) {
+                refresLogoutTimerOnPong(ws as ExSocketInterface);
+            },
             close: (ws, code, message) => {
                 const Client = (ws as ExSocketInterface);
                 try {

back/src/Model/Websocket/ExSocketInterface.ts

@@ -26,6 +26,7 @@ export interface ExSocketInterface extends WebSocket, Identificable {
     batchedMessages: BatchMessage;
     batchTimeout: NodeJS.Timeout|null;
     pingTimeout: NodeJS.Timeout|null;
+    pongTimeout: NodeJS.Timeout|null;
     disconnecting: boolean,
     tags: string[],
     textures: CharacterTexture[],

back/src/Services/IoSocketHelpers.ts

@@ -48,3 +48,12 @@ export function emitError(Client: ExSocketInterface, message: string): void {
     }
     console.warn(message);
 }
+
+export const pongMaxInterval = 30000; // the maximum duration (in ms) between pongs before we shutdown the connexion.
+
+export function refresLogoutTimerOnPong(ws: ExSocketInterface): void {
+    if(ws.pongTimeout) clearTimeout(ws.pongTimeout);
+    ws.pongTimeout = setTimeout(() => {
+        ws.close();
+    }, pongMaxInterval);
+}