forked from zhurui/management
70 lines
1.5 KiB
JavaScript
70 lines
1.5 KiB
JavaScript
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'use strict';
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var EventEmitter = require('events').EventEmitter
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, inherits = require('inherits')
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, JSON3 = require('json3')
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, utils = require('./utils/event')
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, IframeTransport = require('./transport/iframe')
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, InfoReceiverIframe = require('./info-iframe-receiver')
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;
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var debug = function() {};
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if (process.env.NODE_ENV !== 'production') {
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debug = require('debug')('sockjs-client:info-iframe');
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}
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function InfoIframe(baseUrl, url) {
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var self = this;
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EventEmitter.call(this);
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var go = function() {
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var ifr = self.ifr = new IframeTransport(InfoReceiverIframe.transportName, url, baseUrl);
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ifr.once('message', function(msg) {
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if (msg) {
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var d;
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try {
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d = JSON3.parse(msg);
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} catch (e) {
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debug('bad json', msg);
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self.emit('finish');
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self.close();
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return;
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}
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var info = d[0], rtt = d[1];
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self.emit('finish', info, rtt);
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}
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self.close();
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});
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ifr.once('close', function() {
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self.emit('finish');
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self.close();
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});
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};
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// TODO this seems the same as the 'needBody' from transports
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if (!global.document.body) {
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utils.attachEvent('load', go);
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} else {
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go();
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}
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}
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inherits(InfoIframe, EventEmitter);
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InfoIframe.enabled = function() {
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return IframeTransport.enabled();
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};
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InfoIframe.prototype.close = function() {
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if (this.ifr) {
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this.ifr.close();
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}
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this.removeAllListeners();
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this.ifr = null;
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};
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module.exports = InfoIframe;
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