You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
64 lines
1.5 KiB
64 lines
1.5 KiB
'use strict';
|
|
|
|
var inherits = require('inherits')
|
|
, EventEmitter = require('events').EventEmitter
|
|
, EventSourceDriver = require('eventsource')
|
|
;
|
|
|
|
var debug = function() {};
|
|
if (process.env.NODE_ENV !== 'production') {
|
|
debug = require('debug')('sockjs-client:receiver:eventsource');
|
|
}
|
|
|
|
function EventSourceReceiver(url) {
|
|
debug(url);
|
|
EventEmitter.call(this);
|
|
|
|
var self = this;
|
|
var es = this.es = new EventSourceDriver(url);
|
|
es.onmessage = function(e) {
|
|
debug('message', e.data);
|
|
self.emit('message', decodeURI(e.data));
|
|
};
|
|
es.onerror = function(e) {
|
|
debug('error', es.readyState, e);
|
|
// ES on reconnection has readyState = 0 or 1.
|
|
// on network error it's CLOSED = 2
|
|
var reason = (es.readyState !== 2 ? 'network' : 'permanent');
|
|
self._cleanup();
|
|
self._close(reason);
|
|
};
|
|
}
|
|
|
|
inherits(EventSourceReceiver, EventEmitter);
|
|
|
|
EventSourceReceiver.prototype.abort = function() {
|
|
debug('abort');
|
|
this._cleanup();
|
|
this._close('user');
|
|
};
|
|
|
|
EventSourceReceiver.prototype._cleanup = function() {
|
|
debug('cleanup');
|
|
var es = this.es;
|
|
if (es) {
|
|
es.onmessage = es.onerror = null;
|
|
es.close();
|
|
this.es = null;
|
|
}
|
|
};
|
|
|
|
EventSourceReceiver.prototype._close = function(reason) {
|
|
debug('close', reason);
|
|
var self = this;
|
|
// Safari and chrome < 15 crash if we close window before
|
|
// waiting for ES cleanup. See:
|
|
// https://code.google.com/p/chromium/issues/detail?id=89155
|
|
setTimeout(function() {
|
|
self.emit('close', null, reason);
|
|
self.removeAllListeners();
|
|
}, 200);
|
|
};
|
|
|
|
module.exports = EventSourceReceiver;
|