CometD library for CJS.

This is little more than taking the CometdD JavaScript library and making each component available via module.exports.

The org.cometd namespace is not needed. Neither is jQuery!

However you need to set up the XHR yourself.

This is based on the CometD 3.0.3 JavaScript library.

Example

let { CometD, LongPollingTransport, Transport } = require('cometd');

// You need to implement the XHR for the transports.
function LongPoller() {

  let transport = Transport.derive(new LongPollingTransport());

  transport.xhrSend = function(packet) => {

    let xhr  = new XMLHttpRequest();
    let data = JSON.parse(packet.body);

    xhr.open('post', packet.url);

    xhr.setRequestHeader('Content-Type', 'application/json;charset=UTF-8');

    xhr.onreadystatechange = () => {

      if (xhr.readyState === 4) {

        if (xhr.status === 200) {

          packet.onSuccess(xhr.responseText);

        } else {

          packet.onError(xhr.statusText, xhr.response);

        }

      }

    };

    xhr.send(JSON.stringify(data));

  };

  return transport;

}

let cometd = new CometD();

cometd.registerTransport('long-polling', new LongPoller());

cometd.init('<somewhere>/cometd');

cometd.addListener('/meta/connect', (message) => {

  console.log(message);

});

Todo

• Look into using EventEmitters in place of the above boilerplate.
• Ensure all the extenstions work as expected.
• Provide more transport examples.

References

cometd at github

cometd JavaScript library docs

Also see

cometd-jquery