| 'use strict'; |
| |
| var eventUtils = require('./event') |
| , JSON3 = require('json3') |
| , browser = require('./browser') |
| ; |
| |
| var debug = function() {}; |
| if (process.env.NODE_ENV !== 'production') { |
| debug = require('debug')('sockjs-client:utils:iframe'); |
| } |
| |
| module.exports = { |
| WPrefix: '_jp' |
| , currentWindowId: null |
| |
| , polluteGlobalNamespace: function() { |
| if (!(module.exports.WPrefix in global)) { |
| global[module.exports.WPrefix] = {}; |
| } |
| } |
| |
| , postMessage: function(type, data) { |
| if (global.parent !== global) { |
| global.parent.postMessage(JSON3.stringify({ |
| windowId: module.exports.currentWindowId |
| , type: type |
| , data: data || '' |
| }), '*'); |
| } else { |
| debug('Cannot postMessage, no parent window.', type, data); |
| } |
| } |
| |
| , createIframe: function(iframeUrl, errorCallback) { |
| var iframe = global.document.createElement('iframe'); |
| var tref, unloadRef; |
| var unattach = function() { |
| debug('unattach'); |
| clearTimeout(tref); |
| // Explorer had problems with that. |
| try { |
| iframe.onload = null; |
| } catch (x) { |
| // intentionally empty |
| } |
| iframe.onerror = null; |
| }; |
| var cleanup = function() { |
| debug('cleanup'); |
| if (iframe) { |
| unattach(); |
| // This timeout makes chrome fire onbeforeunload event |
| // within iframe. Without the timeout it goes straight to |
| // onunload. |
| setTimeout(function() { |
| if (iframe) { |
| iframe.parentNode.removeChild(iframe); |
| } |
| iframe = null; |
| }, 0); |
| eventUtils.unloadDel(unloadRef); |
| } |
| }; |
| var onerror = function(err) { |
| debug('onerror', err); |
| if (iframe) { |
| cleanup(); |
| errorCallback(err); |
| } |
| }; |
| var post = function(msg, origin) { |
| debug('post', msg, origin); |
| setTimeout(function() { |
| try { |
| // When the iframe is not loaded, IE raises an exception |
| // on 'contentWindow'. |
| if (iframe && iframe.contentWindow) { |
| iframe.contentWindow.postMessage(msg, origin); |
| } |
| } catch (x) { |
| // intentionally empty |
| } |
| }, 0); |
| }; |
| |
| iframe.src = iframeUrl; |
| iframe.style.display = 'none'; |
| iframe.style.position = 'absolute'; |
| iframe.onerror = function() { |
| onerror('onerror'); |
| }; |
| iframe.onload = function() { |
| debug('onload'); |
| // `onload` is triggered before scripts on the iframe are |
| // executed. Give it few seconds to actually load stuff. |
| clearTimeout(tref); |
| tref = setTimeout(function() { |
| onerror('onload timeout'); |
| }, 2000); |
| }; |
| global.document.body.appendChild(iframe); |
| tref = setTimeout(function() { |
| onerror('timeout'); |
| }, 15000); |
| unloadRef = eventUtils.unloadAdd(cleanup); |
| return { |
| post: post |
| , cleanup: cleanup |
| , loaded: unattach |
| }; |
| } |
| |
| /* eslint no-undef: "off", new-cap: "off" */ |
| , createHtmlfile: function(iframeUrl, errorCallback) { |
| var axo = ['Active'].concat('Object').join('X'); |
| var doc = new global[axo]('htmlfile'); |
| var tref, unloadRef; |
| var iframe; |
| var unattach = function() { |
| clearTimeout(tref); |
| iframe.onerror = null; |
| }; |
| var cleanup = function() { |
| if (doc) { |
| unattach(); |
| eventUtils.unloadDel(unloadRef); |
| iframe.parentNode.removeChild(iframe); |
| iframe = doc = null; |
| CollectGarbage(); |
| } |
| }; |
| var onerror = function(r) { |
| debug('onerror', r); |
| if (doc) { |
| cleanup(); |
| errorCallback(r); |
| } |
| }; |
| var post = function(msg, origin) { |
| try { |
| // When the iframe is not loaded, IE raises an exception |
| // on 'contentWindow'. |
| setTimeout(function() { |
| if (iframe && iframe.contentWindow) { |
| iframe.contentWindow.postMessage(msg, origin); |
| } |
| }, 0); |
| } catch (x) { |
| // intentionally empty |
| } |
| }; |
| |
| doc.open(); |
| doc.write('<html><s' + 'cript>' + |
| 'document.domain="' + global.document.domain + '";' + |
| '</s' + 'cript></html>'); |
| doc.close(); |
| doc.parentWindow[module.exports.WPrefix] = global[module.exports.WPrefix]; |
| var c = doc.createElement('div'); |
| doc.body.appendChild(c); |
| iframe = doc.createElement('iframe'); |
| c.appendChild(iframe); |
| iframe.src = iframeUrl; |
| iframe.onerror = function() { |
| onerror('onerror'); |
| }; |
| tref = setTimeout(function() { |
| onerror('timeout'); |
| }, 15000); |
| unloadRef = eventUtils.unloadAdd(cleanup); |
| return { |
| post: post |
| , cleanup: cleanup |
| , loaded: unattach |
| }; |
| } |
| }; |
| |
| module.exports.iframeEnabled = false; |
| if (global.document) { |
| // postMessage misbehaves in konqueror 4.6.5 - the messages are delivered with |
| // huge delay, or not at all. |
| module.exports.iframeEnabled = (typeof global.postMessage === 'function' || |
| typeof global.postMessage === 'object') && (!browser.isKonqueror()); |
| } |
