How to use isomorphic-ws - 10 common examples

new Promise((resolve, reject) => {
      this.current_reject = reject;
      this.current_resolve = resolve;

      try {
        this.ws = new WebSocket(server);
      } catch (error) {
        this.ws = { readyState: 3, close: () => {} }; // DISCONNECTED
        reject(new Error("Invalid url", server, " closed"));
        // return this.close().then(() => {
        //     console.log("Invalid url", ws_server, " closed");
        //     // throw new Error("Invalid url", ws_server, " closed")
        //     // return this.current_reject(Error("Invalid websocket url: " + ws_server));
        // })
      }

      this.ws.onopen = this.onOpen;
      this.ws.onerror = this.onError;
      this.ws.onmessage = this.onMessage;
      this.ws.onclose = this.onClose;

      this.connectionTimeout = setTimeout(() => {

const { hostname, port } = window.location;
      url = `${protocol}//${hostname}:${port}/${path}`;
    } else {
      const protocol = config.useHttps ? 'wss:' : 'ws:';
      const { ip, port } = config;
      url = `${protocol}//${ip}:${port}/${path}`;
    }

    const queryParams = `clientType=${clientType}&key=${key}`;

    // ----------------------------------------------------------
    // init string socket
    // ----------------------------------------------------------
    const stringSocketUrl = `${url}?binary=0&${queryParams}`;

    this.ws = new WebSocket(stringSocketUrl);
    log(`string socket initialized - url: ${stringSocketUrl}`);

    const stringSocketPromise = new Promise((resolve, reject) => {
      this.ws.addEventListener('open', resolve);
    });

    // parse incoming messages for pubsub
    this.ws.addEventListener('message', e => {
      const [channel, args] = unpackStringMessage(e.data);
      this._emit(false, channel, ...args);
    });

    // broadcast all `WebSocket` native events
    [ 'open',
      'close',
      'error',

async function processData(data) {
    const buff = Buffer.alloc(data.length + 1);

    buff.writeInt8(streamNum, 0);
    if (data instanceof Buffer) {
      data.copy(buff, 1);
    } else {
      buff.write(data, 1);
    }

    let i = 0;

    try {
      for (; i < tryLimit; ++i) {
        if (ws && ws.readyState === WebSocket.OPEN) {
          ws.send(buff);
          break;
        } else {
          ws = await createWS()
        }
      }
    } catch (e) {
      // TODO: Сonsider to log network errors.
      console.error(e)
      stdin.end()
    }

    if (i >= tryLimit) {
      stdin.end()
    }
  }

public disconnect(): void {
    if (!this.socket) {
      throw new Error("Socket undefined. This must be called after connecting.");
    }

    this.clearTimeout();

    switch (this.socket.readyState) {
      case WebSocket.OPEN:
        this.socket.close(1000 /* Normal Closure */);
        break;
      case WebSocket.CLOSED:
        // nothing to be done
        break;
      case WebSocket.CONNECTING:
        // imitate missing abort API
        this.socket.onopen = () => 0;
        this.socket.onclose = () => 0;
        this.socket.onerror = () => 0;
        this.socket.onmessage = () => 0;
        this.socket = undefined;
        if (this.closeHandler) {
          this.closeHandler({ wasClean: false, code: 4001 });
        }
        break;
      case WebSocket.CLOSING:
        // already closing. Let it proceed
        break;

break;
      case WebSocket.CLOSED:
        // nothing to be done
        break;
      case WebSocket.CONNECTING:
        // imitate missing abort API
        this.socket.onopen = () => 0;
        this.socket.onclose = () => 0;
        this.socket.onerror = () => 0;
        this.socket.onmessage = () => 0;
        this.socket = undefined;
        if (this.closeHandler) {
          this.closeHandler({ wasClean: false, code: 4001 });
        }
        break;
      case WebSocket.CLOSING:
        // already closing. Let it proceed
        break;
      default:
        throw new Error(`Unknown readyState: ${this.socket.readyState}`);
    }
  }

return new Promise((resolve, reject) => {
      if (!this.socket) {
        throw new Error("Socket undefined. This must be called after connecting.");
      }

      if (this.closed) {
        throw new Error("Socket was closed, so no data can be sent anymore.");
      }

      // this exception should be thrown by send() automatically according to
      // https://developer.mozilla.org/de/docs/Web/API/WebSocket#send() but it does not work in browsers
      if (this.socket.readyState !== WebSocket.OPEN) {
        throw new Error("Websocket is not open");
      }

      if (environmentIsNodeJs()) {
        this.socket.send(data, err => (err ? reject(err) : resolve()));
      } else {
        // Browser websocket send method does not accept a callback
        this.socket.send(data);
        resolve();
      }
    });
  }

public disconnect(): void {
    if (!this.socket) {
      throw new Error("Socket undefined. This must be called after connecting.");
    }

    this.clearTimeout();

    switch (this.socket.readyState) {
      case WebSocket.OPEN:
        this.socket.close(1000 /* Normal Closure */);
        break;
      case WebSocket.CLOSED:
        // nothing to be done
        break;
      case WebSocket.CONNECTING:
        // imitate missing abort API
        this.socket.onopen = () => 0;
        this.socket.onclose = () => 0;
        this.socket.onerror = () => 0;
        this.socket.onmessage = () => 0;
        this.socket = undefined;
        if (this.closeHandler) {
          this.closeHandler({ wasClean: false, code: 4001 });
        }
        break;
      case WebSocket.CLOSING:
        // already closing. Let it proceed
        break;
      default:
        throw new Error(`Unknown readyState: ${this.socket.readyState}`);
    }

private init(): void {
    this.ws = new WebSocket(this.provider);
    this.ws.onopen = (): void => {
      window.console.log("[antenna-ws] connected");
    };
    this.ws.onclose = (): void => {
      window.console.log("[antenna-ws] disconnected");
    };
  }

createGatewayServer = (internalRequestHandler, connectionHandler = defaultConnectionHandler, options = { }) => {
    const serverOption = {}
    if ('port' in options) {
      serverOption.port = options.port
    } else if ('server' in options)  {
      serverOption.server = options.server
    } else if ('noServer' in options) {
      serverOption.noServer = options.noServer
    }
    const server = new WebSocket.Server(serverOption)
    server.on('connection', async (socket, req) => {
      try {
        const { id } = await connectionHandler(socket, req)
        socket.id = id
        this.clientMap[id] = socket
        socket.on('message', (msg) => this.handleGatewayMessage(msg, socket))
        socket.on('close', () => {
          delete this.clientMap[id]
        })
      } catch (e) {
        console.log(e)
        socket.terminate()
      }
    })
    this.replaceInternalSocket(internalRequestHandler)
    return server

async _getWebsocket () {
    const wsUrl = 'ws' + (this.instance.secure ? 's' : '') + '://' + this.instance.host + ':' + this.instance.port + '/Websocket?wrapper_key=' + this.wrapperKey
    let wsClient

    if (!this.multiuser.masterAddress) {
      wsClient = new WebSocket(wsUrl)
    } else {
      wsClient = new WebSocket(wsUrl, [], { headers: { Cookie: 'master_address=' + this.multiuser.masterAddress } })
    }

    wsClient.onmessage = this._onRequest.bind(this)
    wsClient.onopen = this._onOpenWebsocket.bind(this)
    wsClient.onerror = this._onErrorWebsocket.bind(this)
    wsClient.onclose = this._onCloseWebsocket.bind(this)

    return wsClient
  }