Expose websocket server to plugins

Same reasoning used when exposing Express.

src/node/plugin.ts

@@ -7,7 +7,7 @@ import * as pluginapi from "../../typings/pluginapi"
 import { version } from "./constants"
 import { proxy } from "./proxy"
 import * as util from "./util"
-import { Router as WsRouter, WebsocketRouter } from "./wsRouter"
+import { Router as WsRouter, WebsocketRouter, wss } from "./wsRouter"
 const fsp = fs.promises
 
 /**
@@ -24,6 +24,7 @@ require("module")._load = function (request: string, parent: object, isMain: boo
       Level,
       proxy,
       WsRouter,
+      wss,
     }
   }
   return originalLoad.apply(this, [request, parent, isMain])

test/test-plugin/src/index.ts

@@ -1,8 +1,5 @@
 import * as cs from "code-server"
 import * as fspath from "path"
-import Websocket from "ws"
-
-const wss = new Websocket.Server({ noServer: true })
 
 export const plugin: cs.Plugin = {
   displayName: "Test Plugin",
@@ -28,7 +25,7 @@ export const plugin: cs.Plugin = {
   wsRouter() {
     const wr = cs.WsRouter()
     wr.ws("/test-app", (req) => {
-      wss.handleUpgrade(req, req.socket, req.head, (ws) => {
+      cs.wss.handleUpgrade(req, req.socket, req.head, (ws) => {
         ws.send("hello")
       })
     })

typings/pluginapi.d.ts

@@ -6,6 +6,7 @@ import * as express from "express"
 import * as expressCore from "express-serve-static-core"
 import ProxyServer from "http-proxy"
 import * as net from "net"
+import Websocket from "ws"
 
 /**
  * Overlay
@@ -102,6 +103,11 @@ export interface WebsocketRouter {
  */
 export function WsRouter(): WebsocketRouter
 
+/**
+ * The websocket server used by code-server.
+ */
+export const wss: Websocket.Server
+
 /**
  * The Express import used by code-server.
  *
@@ -110,7 +116,6 @@ export function WsRouter(): WebsocketRouter
  * instances.
  */
 export { express }
-
 /**
  * Use to add a field to a log.
  *