feat: migrate to ws-multiplex

Switches to the ws-multiplex package for websocket multiplexing.

BREAKING CHANGE: This brings in a protocol version bump and is not compatible with older clients.

.gitignore

@@ -4,4 +4,4 @@ build.env
 build.js
 exposrd.mjs
 dist
-.pkg-cache
+out

.mocharc.json

@@ -0,0 +1,8 @@
+{
+	"extension": ["js", "ts"],
+	"require": "ts-node/register",
+	"node-option": [
+		"experimental-specifier-resolution=node",
+		"loader=ts-node/esm"
+	]
+}

package.json

@@ -21,6 +21,7 @@
     "Makefile"
   ],
   "dependencies": {
+    "@exposr/ws-multiplex": "^1.2.0",
     "better-sqlite3": "^8.3.0",
     "content-type": "^1.0.5",
     "koa": "^2.14.1",
@@ -40,18 +41,26 @@
   "devDependencies": {
     "@rollup/plugin-commonjs": "^24.0.1",
     "@rollup/plugin-json": "^6.0.0",
+    "@types/node": "^20.5.0",
+    "@types/ws": "^8.5.5",
     "commit-and-tag-version": "^11.2.1",
     "mocha": "^10.2.0",
     "rollup": "^3.18.0",
     "sinon": "^15.0.3",
+    "ts-node": "^10.9.1",
+    "typescript": "^5.1.6",
     "yaml": "^2.2.2"
   },
   "scripts": {
     "prepack": "yarn run version && yarn run bundle",
     "postpack": "rm build.env exposrd.mjs",
     "release": "standard-version",
     "version": "scripts/build-version.sh",
-    "bundle": "rollup exposrd.js --file exposrd.mjs --format es -p @rollup/plugin-commonjs  -p @rollup/plugin-json",
+    "prebuild": "rm -fr out && mkdir out && cp package.json out",
+    "build": "tsc",
+    "dev": "ts-node-esm exposrd.js",
+    "prebundle": "yarn run build",
+    "bundle": "rollup out/exposrd.js --file exposrd.mjs --format es -p @rollup/plugin-commonjs  -p @rollup/plugin-json",
     "dist": "scripts/build-dist.sh",
     "test": "scripts/run-test.sh"
   }

src/ingress/http-ingress.js

@@ -152,6 +152,7 @@ class HttpIngress {
     _createAgent(tunnelId) {
         const agent = new Agent({
             keepAlive: true,
+            timeout: this._agent_ttl * 1000,
         });
 
         agent.createConnection = (opts, callback) => {

src/transport/ws/ws-endpoint.js

@@ -24,6 +24,7 @@ class WebSocketEndpoint {
         this.tunnelService = new TunnelService();
         this.wss = new WebSocketServer({ noServer: true });
         this.destroyed = false;
+        this.connections = [];
 
         this._upgradeHandler = this.httpListener.use('upgrade', { logger: this.logger }, async (ctx, next) => {
             if (!await this.handleUpgrade(ctx.req, ctx.sock, ctx.head)) {
@@ -56,9 +57,13 @@ class WebSocketEndpoint {
     async destroy() {
         this.destroyed = true;
         this.httpListener.removeHandler('upgrade', this._upgradeHandler);
-        this.wss.clients.forEach((client) => {
-            client.close(1001, "Server shutting down");
-        });
+        for (const connection of this.connections) {
+            const {wst, ws} = connection;
+            await wst.destroy();
+            ws.close(1001, "Server shutting down");
+        }
+        this.connections = [];
+        this.wss.close();
         return Promise.allSettled([
             this.tunnelService.destroy(),
             Listener.release('http', this.opts.port),
@@ -167,8 +172,10 @@ class WebSocketEndpoint {
                         operation: 'upgrade',
                         msg: 'failed to connect transport'
                     });
-                ws.close(1008, "unable to establish tunnel");
                 transport.destroy();
+                ws.close(1008, "unable to establish tunnel");
+            } else {
+                this.connections.push({transport, ws});
             }
         });
         return true;