tenebrous-dicebot/api/node_modules/sockjs-client/lib/transport/lib/polling.js

58 lines
1.3 KiB
JavaScript

'use strict';
var inherits = require('inherits')
, EventEmitter = require('events').EventEmitter
;
var debug = function() {};
if (process.env.NODE_ENV !== 'production') {
debug = require('debug')('sockjs-client:polling');
}
function Polling(Receiver, receiveUrl, AjaxObject) {
debug(receiveUrl);
EventEmitter.call(this);
this.Receiver = Receiver;
this.receiveUrl = receiveUrl;
this.AjaxObject = AjaxObject;
this._scheduleReceiver();
}
inherits(Polling, EventEmitter);
Polling.prototype._scheduleReceiver = function() {
debug('_scheduleReceiver');
var self = this;
var poll = this.poll = new this.Receiver(this.receiveUrl, this.AjaxObject);
poll.on('message', function(msg) {
debug('message', msg);
self.emit('message', msg);
});
poll.once('close', function(code, reason) {
debug('close', code, reason, self.pollIsClosing);
self.poll = poll = null;
if (!self.pollIsClosing) {
if (reason === 'network') {
self._scheduleReceiver();
} else {
self.emit('close', code || 1006, reason);
self.removeAllListeners();
}
}
});
};
Polling.prototype.abort = function() {
debug('abort');
this.removeAllListeners();
this.pollIsClosing = true;
if (this.poll) {
this.poll.abort();
}
};
module.exports = Polling;