TypeScript Socket.setTimeout方法代碼示例

/*
If we connect to the machine, send one initial query and then stop, how long
can we idle until the machine terminates our connection?

Testing shows that this doesn't seem to be one consistent timeout, and that
instead it's however long it takes until the wifi flakes out a little bit.
*/
function guessIdleTimeout() {
  log.info('Estimating idle time...');
  let start = Date.now();

  let sock = new Socket();
  sock.setTimeout(10000);
  killOnProcessExit(sock);
  sock.on('data', function (data) {
    log.inbound(escapeUnprintables(data));
    if (String(data) === '*HELLO*') {
      setTimeout(function () {
        let msg = Checksum.attach('r00000001');
        log.outbound(msg);
        sock.write(msg);
      }, 100);
    }
  });
  sock.on('error', err => {
    let elapsed = Date.now() - start;
    log.info('elapsed', elapsed, 'ms');
    log.error(err);
    process.exit(1);
  });
  log.info('Connecting to %s:%s ...', DEST_HOST, DEST_PORT);
  sock.connect(DEST_PORT, DEST_HOST, function () {
    log.info('Connected');
    setInterval(() => {
      let elapsed = Date.now() - start;
      log.info('elapsed', elapsed, 'ms');
    }, 10000);
  });
}

function createClientSocket(endpointUrl: string): Socket {
    // create a socket based on Url
    const ep = parseEndpointUrl(endpointUrl);
    const port = parseInt( ep.port!, 10);
    const hostname = ep.hostname!;
    let socket: Socket;
    switch (ep.protocol) {
        case "opc.tcp:":

            socket = createConnection({ host: hostname, port });

            // Setting true for noDelay will immediately fire off data each time socket.write() is called.
            socket.setNoDelay(true);

            socket.setTimeout(0);

            socket.on("timeout", () => {
                debugLog("Socket has timed out");
            });

            return socket;
        case "fake:":
            socket = getFakeTransport();
            assert(ep.protocol === "fake:", " Unsupported transport protocol");
            process.nextTick(() => socket.emit("connect"));
            return socket;

        case "websocket:":
        case "http:":
        case "https:FF":
        default:
            throw new Error("this transport protocol is currently not supported :" + ep.protocol);

    }
}

function memoryMap() {
  log.info('Reading memory...');

  //build up the socket
  let sock = new Socket();
  sock.setTimeout(10000);
  killOnProcessExit(sock);
  sock.on('error', err => {
    log.error(err);
    process.exit(1);
  });
  log.info('Connecting to %s:%s ...', DEST_HOST, DEST_PORT);

  sock.connect(DEST_PORT, DEST_HOST, function () {
    log.info('Connected');
  });

  //wait for first *HELLO* before starting the polling
  sock.once('data', function(data) {
    if (data) data = String(data);
    log.inbound(data);
    setTimeout(pollingLoop, 150);
  });
  //polling loop

  //store succesfully-read values here
  let values:(number|null)[] = new Array(0xFFFF);
  for (let i = 0; i < values.length; i++) {
    values[i] = 0;
  }
  let offset = 0x00;
  const startTime = Date.now();
  function pollingLoop() {
    readByte(sock, offset, (readable:boolean, value?:number) => {
      log.normal('byte', to4hex(offset), readable ? STATUS_OK : STATUS_ERR, value);
      //forecast ETA
      let elapsed = Date.now() - startTime;
      let total = elapsed * (0xffff / (offset + 1));
      let remain = total - elapsed;
      log.info('progress: elapsed', Math.round(elapsed/1000), 'sec; estimated remain', Math.round(remain / 1000), 'sec');
      //write to file... occasionally
      values[offset] = readable ? value : null;
      if (offset % 0x100 === 0) {
        log.info('SAVING RESULTS TO DISK');
        fs.writeFileSync('memscan.json', JSON.stringify(values));
      }
      //next
      offset += 1;
      if (offset <= 0xffff) {
        setTimeout(pollingLoop, 150);
      } else {
        log.info('SAVING RESULTS TO DISK');
        fs.writeFileSync('memscan.json', JSON.stringify(values));
        process.exit(0);
      }
    });
  }
}

    /**
     * @method _install_socket
     * @param socket {Socket}
     * @protected
     */
    protected _install_socket(socket: Socket) {

        assert(socket);
        this._socket = socket;
        if (doDebug) {
            debugLog("_install_socket ", this.name);
        }

        // install packet assembler ...
        this.packetAssembler = new PacketAssembler({
            readMessageFunc: readRawMessageHeader,

            minimumSizeInBytes: this.headerSize
        });

        if (!this.packetAssembler) {
            throw new Error("Internal Error");
        }
        this.packetAssembler.on("message", (messageChunk: Buffer) => this._on_message_received(messageChunk));

        this._socket
          .on("data", (data: Buffer) => this._on_socket_data(data))
          .on("close", (hadError) => this._on_socket_close(hadError))
          .on("end", (err: Error) => this._on_socket_end(err))
          .on("error", (err: Error) => this._on_socket_error(err));

        const doDestroyOnTimeout = false;
        if (doDestroyOnTimeout) {
            // set socket timeout
            debugLog("setting _socket.setTimeout to ", this.timeout);
            this._socket.setTimeout(this.timeout, () => {
                debugLog(` _socket ${this.name} has timed out (timeout = ${this.timeout})`);
                if (this._socket) {
                    this._socket.destroy();
                    // 08/2008 shall we do this ?
                    this._socket.removeAllListeners();
                    this._socket = null;
                }
            });
        }
    }

    const connect = () => {
      attempt++;

      const socket = new net.Socket();
      socket.once('error', () => {
        if (attempt < maxAttempts) {
          setTimeout(connect, retryIntervalMs);
        } else {
          reject(new errors.ServerUnreachable());
        }
      });

      if (timeout > 0) {
        socket.setTimeout(timeout);
      }

      socket.connect({host, port}, () => {
        socket.end();
        fulfill();
      });
    };

 request.on("socket", function (socket: Socket) {
   socket.setTimeout(60 * 1000, () => {
     callback(new Error("Request timed out"))
     request.abort()
   })
 })