aaac7fed
 liuqimichale
add
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'use strict';
var urlUtils = require('./utils/url')
, eventUtils = require('./utils/event')
, JSON3 = require('json3')
, FacadeJS = require('./facade')
, InfoIframeReceiver = require('./info-iframe-receiver')
, iframeUtils = require('./utils/iframe')
, loc = require('./location')
;
var debug = function() {};
if (process.env.NODE_ENV !== 'production') {
debug = require('debug')('sockjs-client:iframe-bootstrap');
}
module.exports = function(SockJS, availableTransports) {
var transportMap = {};
availableTransports.forEach(function(at) {
if (at.facadeTransport) {
transportMap[at.facadeTransport.transportName] = at.facadeTransport;
}
});
// hard-coded for the info iframe
// TODO see if we can make this more dynamic
transportMap[InfoIframeReceiver.transportName] = InfoIframeReceiver;
var parentOrigin;
/* eslint-disable camelcase */
SockJS.bootstrap_iframe = function() {
/* eslint-enable camelcase */
var facade;
iframeUtils.currentWindowId = loc.hash.slice(1);
var onMessage = function(e) {
if (e.source !== parent) {
return;
}
if (typeof parentOrigin === 'undefined') {
parentOrigin = e.origin;
}
if (e.origin !== parentOrigin) {
return;
}
var iframeMessage;
try {
iframeMessage = JSON3.parse(e.data);
} catch (ignored) {
debug('bad json', e.data);
return;
}
if (iframeMessage.windowId !== iframeUtils.currentWindowId) {
return;
}
switch (iframeMessage.type) {
case 's':
var p;
try {
p = JSON3.parse(iframeMessage.data);
} catch (ignored) {
debug('bad json', iframeMessage.data);
break;
}
var version = p[0];
var transport = p[1];
var transUrl = p[2];
var baseUrl = p[3];
debug(version, transport, transUrl, baseUrl);
// change this to semver logic
if (version !== SockJS.version) {
throw new Error('Incompatible SockJS! Main site uses:' +
' "' + version + '", the iframe:' +
' "' + SockJS.version + '".');
}
if (!urlUtils.isOriginEqual(transUrl, loc.href) ||
!urlUtils.isOriginEqual(baseUrl, loc.href)) {
throw new Error('Can\'t connect to different domain from within an ' +
'iframe. (' + loc.href + ', ' + transUrl + ', ' + baseUrl + ')');
}
facade = new FacadeJS(new transportMap[transport](transUrl, baseUrl));
break;
case 'm':
facade._send(iframeMessage.data);
break;
case 'c':
if (facade) {
facade._close();
}
facade = null;
break;
}
};
eventUtils.attachEvent('message', onMessage);
// Start
iframeUtils.postMessage('s');
};
};
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