'use strict';
|
|
var EventEmitter = require('events').EventEmitter
|
, inherits = require('inherits')
|
, utils = require('./utils/event')
|
, IframeTransport = require('./transport/iframe')
|
, InfoReceiverIframe = require('./info-iframe-receiver')
|
;
|
|
var debug = function() {};
|
if (process.env.NODE_ENV !== 'production') {
|
debug = require('debug')('sockjs-client:info-iframe');
|
}
|
|
function InfoIframe(baseUrl, url) {
|
var self = this;
|
EventEmitter.call(this);
|
|
var go = function() {
|
var ifr = self.ifr = new IframeTransport(InfoReceiverIframe.transportName, url, baseUrl);
|
|
ifr.once('message', function(msg) {
|
if (msg) {
|
var d;
|
try {
|
d = JSON.parse(msg);
|
} catch (e) {
|
debug('bad json', msg);
|
self.emit('finish');
|
self.close();
|
return;
|
}
|
|
var info = d[0], rtt = d[1];
|
self.emit('finish', info, rtt);
|
}
|
self.close();
|
});
|
|
ifr.once('close', function() {
|
self.emit('finish');
|
self.close();
|
});
|
};
|
|
// TODO this seems the same as the 'needBody' from transports
|
if (!global.document.body) {
|
utils.attachEvent('load', go);
|
} else {
|
go();
|
}
|
}
|
|
inherits(InfoIframe, EventEmitter);
|
|
InfoIframe.enabled = function() {
|
return IframeTransport.enabled();
|
};
|
|
InfoIframe.prototype.close = function() {
|
if (this.ifr) {
|
this.ifr.close();
|
}
|
this.removeAllListeners();
|
this.ifr = null;
|
};
|
|
module.exports = InfoIframe;
|
