1 line
5.7 KiB
JSON
1 line
5.7 KiB
JSON
{"ast":null,"code":"'use strict';\n\nvar utils = require('../../utils/iframe'),\n random = require('../../utils/random'),\n browser = require('../../utils/browser'),\n urlUtils = require('../../utils/url'),\n inherits = require('inherits'),\n EventEmitter = require('events').EventEmitter;\n\nvar debug = function debug() {};\n\nif (process.env.NODE_ENV !== 'production') {\n debug = require('debug')('sockjs-client:receiver:jsonp');\n}\n\nfunction JsonpReceiver(url) {\n debug(url);\n var self = this;\n EventEmitter.call(this);\n utils.polluteGlobalNamespace();\n this.id = 'a' + random.string(6);\n var urlWithId = urlUtils.addQuery(url, 'c=' + encodeURIComponent(utils.WPrefix + '.' + this.id));\n global[utils.WPrefix][this.id] = this._callback.bind(this);\n\n this._createScript(urlWithId); // Fallback mostly for Konqueror - stupid timer, 35 seconds shall be plenty.\n\n\n this.timeoutId = setTimeout(function () {\n debug('timeout');\n\n self._abort(new Error('JSONP script loaded abnormally (timeout)'));\n }, JsonpReceiver.timeout);\n}\n\ninherits(JsonpReceiver, EventEmitter);\n\nJsonpReceiver.prototype.abort = function () {\n debug('abort');\n\n if (global[utils.WPrefix][this.id]) {\n var err = new Error('JSONP user aborted read');\n err.code = 1000;\n\n this._abort(err);\n }\n};\n\nJsonpReceiver.timeout = 35000;\nJsonpReceiver.scriptErrorTimeout = 1000;\n\nJsonpReceiver.prototype._callback = function (data) {\n debug('_callback', data);\n\n this._cleanup();\n\n if (this.aborting) {\n return;\n }\n\n if (data) {\n debug('message', data);\n this.emit('message', data);\n }\n\n this.emit('close', null, 'network');\n this.removeAllListeners();\n};\n\nJsonpReceiver.prototype._abort = function (err) {\n debug('_abort', err);\n\n this._cleanup();\n\n this.aborting = true;\n this.emit('close', err.code, err.message);\n this.removeAllListeners();\n};\n\nJsonpReceiver.prototype._cleanup = function () {\n debug('_cleanup');\n clearTimeout(this.timeoutId);\n\n if (this.script2) {\n this.script2.parentNode.removeChild(this.script2);\n this.script2 = null;\n }\n\n if (this.script) {\n var script = this.script; // Unfortunately, you can't really abort script loading of\n // the script.\n\n script.parentNode.removeChild(script);\n script.onreadystatechange = script.onerror = script.onload = script.onclick = null;\n this.script = null;\n }\n\n delete global[utils.WPrefix][this.id];\n};\n\nJsonpReceiver.prototype._scriptError = function () {\n debug('_scriptError');\n var self = this;\n\n if (this.errorTimer) {\n return;\n }\n\n this.errorTimer = setTimeout(function () {\n if (!self.loadedOkay) {\n self._abort(new Error('JSONP script loaded abnormally (onerror)'));\n }\n }, JsonpReceiver.scriptErrorTimeout);\n};\n\nJsonpReceiver.prototype._createScript = function (url) {\n debug('_createScript', url);\n var self = this;\n var script = this.script = global.document.createElement('script');\n var script2; // Opera synchronous load trick.\n\n script.id = 'a' + random.string(8);\n script.src = url;\n script.type = 'text/javascript';\n script.charset = 'UTF-8';\n script.onerror = this._scriptError.bind(this);\n\n script.onload = function () {\n debug('onload');\n\n self._abort(new Error('JSONP script loaded abnormally (onload)'));\n }; // IE9 fires 'error' event after onreadystatechange or before, in random order.\n // Use loadedOkay to determine if actually errored\n\n\n script.onreadystatechange = function () {\n debug('onreadystatechange', script.readyState);\n\n if (/loaded|closed/.test(script.readyState)) {\n if (script && script.htmlFor && script.onclick) {\n self.loadedOkay = true;\n\n try {\n // In IE, actually execute the script.\n script.onclick();\n } catch (x) {// intentionally empty\n }\n }\n\n if (script) {\n self._abort(new Error('JSONP script loaded abnormally (onreadystatechange)'));\n }\n }\n }; // IE: event/htmlFor/onclick trick.\n // One can't rely on proper order for onreadystatechange. In order to\n // make sure, set a 'htmlFor' and 'event' properties, so that\n // script code will be installed as 'onclick' handler for the\n // script object. Later, onreadystatechange, manually execute this\n // code. FF and Chrome doesn't work with 'event' and 'htmlFor'\n // set. For reference see:\n // http://jaubourg.net/2010/07/loading-script-as-onclick-handler-of.html\n // Also, read on that about script ordering:\n // http://wiki.whatwg.org/wiki/Dynamic_Script_Execution_Order\n\n\n if (typeof script.async === 'undefined' && global.document.attachEvent) {\n // According to mozilla docs, in recent browsers script.async defaults\n // to 'true', so we may use it to detect a good browser:\n // https://developer.mozilla.org/en/HTML/Element/script\n if (!browser.isOpera()) {\n // Naively assume we're in IE\n try {\n script.htmlFor = script.id;\n script.event = 'onclick';\n } catch (x) {// intentionally empty\n }\n\n script.async = true;\n } else {\n // Opera, second sync script hack\n script2 = this.script2 = global.document.createElement('script');\n script2.text = \"try{var a = document.getElementById('\" + script.id + \"'); if(a)a.onerror();}catch(x){};\";\n script.async = script2.async = false;\n }\n }\n\n if (typeof script.async !== 'undefined') {\n script.async = true;\n }\n\n var head = global.document.getElementsByTagName('head')[0];\n head.insertBefore(script, head.firstChild);\n\n if (script2) {\n head.insertBefore(script2, head.firstChild);\n }\n};\n\nmodule.exports = JsonpReceiver;","map":null,"metadata":{},"sourceType":"script"} |