| 1 | 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{ json, urlencoded } from 'body-parser';\nimport express from 'express';\nimport { Server as HttpServer } from 'http';\nimport { Socket } from 'net';\nimport WebSocket from 'ws';\nimport { Handle } from '@theintern/common';\n\nimport { pullFromArray } from './common/util';\nimport { isErrnoException } from './node/util';\nimport Node from './executors/Node';\nimport { Message } from './channels/Base';\n\nimport instrument from './middleware/instrument';\nimport unhandled from './middleware/unhandled';\nimport finalError from './middleware/finalError';\nimport resolveSuites from './middleware/resolveSuites';\nimport post from './middleware/post';\nimport filterUrl from './middleware/filterUrl';\n\nexport interface Context {\n readonly stopped: boolean;\n readonly basePath: string;\n readonly executor: Node;\n handleMessage(message: Message): Promise<any>;\n}\n\nexport default class Server implements ServerProperties {\n /** Executor managing this Server */\n readonly executor!: Node;\n\n /** Base path to resolve file requests against */\n basePath!: string;\n\n /** Port to use for HTTP connections */\n port!: number;\n\n /**\n * If true, wait for emit handlers to complete before responding to a\n * message\n */\n runInSync!: boolean;\n\n /** Port to use for WebSocket connections */\n socketPort!: number;\n\n get stopped() {\n return !this._httpServer;\n }\n\n protected _app: express.Express | undefined;\n protected _httpServer: HttpServer | undefined;\n protected _sessions:\n | { [id: string]: { listeners: ServerListener[] } }\n | undefined;\n protected _wsServer: WebSocket.Server | undefined;\n protected _wsPingTimers: NodeJS.Timer[];\n\n constructor(options: ServerOptions) {\n Object.assign(\n this,\n {\n basePath: '.',\n runInSync: false,\n },\n options\n );\n this._wsPingTimers = [];\n }\n\n start() {\n let startupError: Error;\n let wsServer: WebSocket.Server;\n let httpServer: HttpServer;\n\n return new Promise<void>((resolve, reject) => {\n const app = (this._app = express());\n this._sessions = {};\n\n this.executor.log(\n 'Listening for WebSocket connections on port',\n this.socketPort\n );\n\n let clientCount = 0;\n wsServer = new WebSocket.Server({ port: this.socketPort });\n wsServer.on('connection', (client) => {\n clientCount++;\n this.executor.log(`WebSocket client ${clientCount} connected`);\n this._handleWebSocket(client, clientCount);\n });\n wsServer.on('error', (error) => {\n if (isErrnoException(error) && error.code === 'EADDRINUSE') {\n const err: NodeJS.ErrnoException = new Error(\n `Something is already listening on the websocket server port (${this.socketPort})`\n );\n err.code = error.code;\n err.errno = error.errno;\n reject(err);\n } else if (!this._wsServer) {\n reject(error);\n } else {\n this.executor.emit('error', error);\n }\n });\n wsServer.on('close', () => {\n for (const timer of this._wsPingTimers) {\n clearInterval(timer);\n }\n });\n\n const context = Object.create(null, {\n stopped: {\n enumerable: true,\n get: () => this.stopped,\n },\n basePath: {\n enumerable: true,\n get: () => this.basePath,\n },\n executor: {\n enumerable: true,\n get: () => this.executor,\n },\n handleMessage: {\n enumerable: false,\n writable: false,\n configurable: false,\n value: (message: Message) => this._handleMessage(message),\n },\n });\n\n // Add \"intern\" object to both request and response objects\n Object.defineProperty(app.request, 'intern', {\n enumerable: true,\n get: () => context,\n });\n Object.defineProperty(app.response, 'intern', {\n enumerable: true,\n get: () => context,\n });\n\n app.use(filterUrl());\n\n // Handle JSON and form-encoded request bodies\n app.use(json({ limit: '1mb' }), urlencoded({ extended: true }));\n\n // Log all requests\n app.use((request, _response, next) => {\n this.executor.log(`${request.method} request for ${request.url}`);\n return next();\n });\n\n const internPath = this.executor.config.internPath;\n\n // Allow resolution using both __intern and node_modules/intern.\n // Note that internPath will always end with a '/'.\n app.use(\n [`/${internPath}__resolveSuites__`, '/__intern/__resolveSuites__'],\n resolveSuites(context)\n );\n\n // Map __intern to config.internPath\n app.use('/__intern', express.static(internPath, { fallthrough: false }));\n\n // TODO: Allow user to add middleware here\n\n app.use(\n instrument(context),\n express.static(this.basePath),\n post(context),\n unhandled(),\n finalError()\n );\n\n httpServer = app.listen(this.port, resolve);\n httpServer.on('error', (error) => {\n if (isErrnoException(error) && error.code === 'EADDRINUSE') {\n const err: NodeJS.ErrnoException = new Error(\n `Something is already listening on the server port (${this.port})`\n );\n err.code = error.code;\n err.errno = error.errno;\n reject(err);\n } else if (!this._httpServer) {\n reject(error);\n } else {\n this.executor.emit('error', error);\n }\n });\n\n const sockets: Socket[] = [];\n\n // If sockets are not manually destroyed then Node.js will keep\n // itself running until they all expire\n httpServer.on('close', () => {\n let socket: Socket | undefined;\n while ((socket = sockets.pop())) {\n socket.destroy();\n }\n });\n\n httpServer.on('connection', (socket) => {\n sockets.push(socket);\n this.executor.log(\n 'HTTP connection opened,',\n sockets.length,\n 'open connections'\n );\n\n socket.on('close', () => {\n let index = sockets.indexOf(socket);\n index !== -1 && sockets.splice(index, 1);\n this.executor.log(\n 'HTTP connection closed,',\n sockets.length,\n 'open connections'\n );\n });\n });\n })\n .then(() => {\n this._wsServer = wsServer;\n this._httpServer = httpServer;\n })\n .catch((error) => {\n startupError = error;\n try {\n wsServer.close();\n } catch (_error) {}\n try {\n httpServer.close();\n } catch (_error) {}\n })\n .then(() => {\n if (startupError) {\n throw startupError;\n }\n });\n }\n\n stop() {\n this.executor.log('Stopping server...');\n const promises: Promise<any>[] = [];\n\n if (this._app && this._httpServer) {\n promises.push(\n new Promise((resolve) => {\n this._httpServer!.close(resolve);\n }).then(() => {\n this.executor.log('Stopped http server');\n this._app = this._httpServer = undefined;\n })\n );\n }\n\n if (this._wsServer) {\n promises.push(\n new Promise((resolve) => {\n this._wsServer!.close(resolve);\n }).then(() => {\n this.executor.log('Stopped ws server');\n this._wsServer = undefined;\n })\n );\n }\n\n return Promise.all(promises);\n }\n\n /**\n * Listen for all events for a specific session\n */\n subscribe(sessionId: string, listener: ServerListener): Handle {\n const listeners = this._getSession(sessionId).listeners;\n listeners.push(listener);\n return {\n destroy: function (this: any) {\n this.destroy = function () {};\n pullFromArray(listeners, listener);\n },\n };\n }\n\n private _getSession(sessionId: string) {\n let session = this._sessions![sessionId];\n if (!session) {\n session = this._sessions![sessionId] = { listeners: [] };\n }\n return session;\n }\n\n private _handleMessage(message: Message): Promise<any> {\n this.executor.log(\n 'Processing message [',\n message.id,\n '] for',\n message.sessionId,\n ':',\n message.name\n );\n\n const promise = this._publish(message);\n if (getShouldWait(this.runInSync, message)) {\n return promise;\n }\n\n // If we're not returning the promise, catch any errors to avoid\n // unhandled rejections\n promise.catch((error) => {\n this.executor.emit('error', error);\n });\n\n return resolvedPromise;\n }\n\n private _handleWebSocket(client: WebSocket, id: number) {\n let isAlive = true;\n\n // Send a ping every 30 seconds to check that the client is alive, and to\n // keep the connection alive\n const timer = setInterval(() => {\n if (!isAlive) {\n client.terminate();\n clearInterval(timer);\n }\n isAlive = false;\n this.executor.log('Sending ping to remote', id);\n client.ping();\n }, 30000);\n\n // Keep track of the heartbeat timer so it can be cleared if the server is\n // stopped.\n this._wsPingTimers.push(timer);\n\n // When a response is received from the client, flag it as still alive\n client.on('pong', () => {\n this.executor.log('Received pong from remote', id);\n isAlive = true;\n });\n\n client.on('message', (data) => {\n this.executor.log('Received WebSocket message from', id);\n const message: Message = JSON.parse(data.toString());\n this._handleMessage(message)\n .catch((error) => this.executor.emit('error', error))\n .then(() => {\n this.executor.log('Sending ack for [', message.id, '] to', id);\n client.send(JSON.stringify({ id: message.id }), (error) => {\n if (error) {\n this.executor.emit(\n 'error',\n new Error(\n `Error sending ack for [ ${message.id} ] to ${id}: ${error.message}`\n )\n );\n }\n });\n });\n });\n\n client.on('error', (error) => {\n this.executor.log(`WebSocket client error for ${id}:`, error);\n this.executor.emit('error', error);\n clearInterval(timer);\n });\n }\n\n private _publish(message: Message) {\n const listeners = this._getSession(message.sessionId).listeners;\n return Promise.all(\n listeners.map((listener) => listener(message.name, message.data))\n );\n }\n}\n\nexport interface ServerProperties {\n basePath: string;\n executor: Node;\n port: number;\n runInSync: boolean;\n socketPort: number;\n}\n\nexport interface ServerListener {\n (name: string, data?: any): void;\n}\n\nexport type ServerOptions = Partial<ServerProperties> & { executor: Node };\n\nconst resolvedPromise = Promise.resolve();\n\n/**\n * Indicate whether Server should wait for an event to process before sending an\n * acknowlegement.\n */\nfunction getShouldWait(waitMode: string | boolean, message: Message) {\n let eventName = message.name;\n\n // never wait for runEnd\n if (eventName === 'runEnd') {\n return false;\n }\n\n let shouldWait = false;\n\n if (waitMode === 'fail') {\n if (\n (eventName === 'testEnd' && message.data.error) ||\n (eventName === 'suiteEnd' && message.data.error) ||\n eventName === 'error'\n ) {\n shouldWait = true;\n }\n } else if (waitMode === true) {\n shouldWait = true;\n } else if (Array.isArray(waitMode) && waitMode.indexOf(eventName) !== -1) {\n shouldWait = true;\n }\n\n return shouldWait;\n}\n"]} |