/* sockjs-client v1.4.0 | http://sockjs.org | MIT license */
(function(a){"object"===typeof exports&&"undefined"!==typeof module?module.exports=a():"function"===typeof define&&define.amd?define([],a):("undefined"!==typeof window?window:"undefined"!==typeof global?global:"undefined"!==typeof self?self:this).SockJS=a()})(function(){return function(){function a(f,k,d){function c(e,g){if(!k[e]){if(!f[e]){var h="function"==typeof require&&require;if(!g&&h)return h(e,!0);if(b)return b(e,!0);h=Error("Cannot find module '"+e+"'");throw h.code="MODULE_NOT_FOUND",h;}h=k[e]={exports:{}};f[e][0].call(h.exports,function(b){return c(f[e][1][b]||b)},h,h.exports,a,f,k,d)}return k[e].exports}for(var b="function"==typeof require&&require,g=0;g<d.length;g++)c(d[g]);return c}return a}()({1:[function(a,f,k){k="undefined"!==typeof global?global:"undefined"!==typeof self?self:"undefined"!==typeof window?window:{};var d=a("./transport-list");f.exports=a("./main")(d);"_sockjs_onload"in k&&setTimeout(k._sockjs_onload,1)},{"./main":14,"./transport-list":16}],2:[function(a,f,k){function d(){c.call(this);this.initEvent("close",!1,!1);this.wasClean=!1;this.code=0;this.reason=""}k=a("inherits");var c=a("./event");k(d,c);f.exports=d},{"./event":4,inherits:57}],3:[function(a,f,k){function d(){c.call(this)}k=a("inherits");var c=a("./eventtarget");k(d,c);d.prototype.removeAllListeners=function(b){b?delete this._listeners[b]:this._listeners={}};d.prototype.once=function(b,c){function a(){g.removeListener(b,a);d||(d=!0,c.apply(this,arguments))}var g=this,d=!1;this.on(b,a)};d.prototype.emit=function(){var b=this._listeners[arguments[0]];if(b){for(var c=arguments.length,a=Array(c-1),h=1;h<c;h++)a[h-1]=arguments[h];for(c=0;c<b.length;c++)b[c].apply(this,a)}};d.prototype.on=d.prototype.addListener=c.prototype.addEventListener;d.prototype.removeListener=c.prototype.removeEventListener;f.exports.EventEmitter=d},{"./eventtarget":5,inherits:57}],4:[function(a,f,k){function d(c){this.type=c}d.prototype.initEvent=function(c,b,a){this.type=c;this.bubbles=b;this.cancelable=a;this.timeStamp=+new Date;return this};d.prototype.stopPropagation=function(){};d.prototype.preventDefault=function(){};d.CAPTURING_PHASE=1;d.AT_TARGET=2;d.BUBBLING_PHASE=3;f.exports=d},{}],5:[function(a,f,k){function d(){this._listeners={}}d.prototype.addEventListener=function(c,b){c in this._listeners||(this._listeners[c]=[]);var a=this._listeners[c];-1===a.indexOf(b)&&(a=a.concat([b]));this._listeners[c]=a};d.prototype.removeEventListener=function(c,b){var a=this._listeners[c];if(a){var e=a.indexOf(b);-1!==e&&(1<a.length?this._listeners[c]=a.slice(0,e).concat(a.slice(e+1)):delete this._listeners[c])}};d.prototype.dispatchEvent=function(){var a=arguments[0],b=a.type,a=1===arguments.length?[a]:Array.apply(null,arguments);this["on"+b]&&this["on"+b].apply(this,a);if(b in this._listeners)for(var b=this._listeners[b],d=0;d<b.length;d++)b[d].apply(this,a)};f.exports=d},{}],6:[function(a,f,k){function d(b){c.call(this);this.initEvent("message",!1,!1);this.data=b}k=a("inherits");var c=a("./event");k(d,c);f.exports=d},{"./event":4,inherits:57}],7:[function(a,f,k){function d(b){this._transport=b;b.on("message",this._transportMessage.bind(this));b.on("close",this._transportClose.bind(this))}var c=a("json3"),b=a("./utils/iframe");d.prototype._transportClose=function(a,e){b.postMessage("c",c.stringify([a,e]))};d.prototype._transportMessage=function(a){b.postMessage("t",a)};d.prototype._send=function(b){this._transport.send(b)};d.prototype._close=function(){this._transport.close();this._transport.removeAllListeners()};f.exports=d},{"./utils/iframe":47,json3:58}],8:[function(a,f,k){(function(d){var c=a("./utils/url"),b=a("./utils/event"),g=a("json3"),e=a("./facade"),h=a("./info-iframe-receiver"),l=a("./utils/iframe"),r=a("./location"),n=function(){};"production"!==d.env.NODE_ENV&&(n=a("debug")("sockjs-client:iframe-bootstrap"));f.exports=function(a,d){var p={};d.forEach(function(b){b.facadeTransport&&(p[b.facadeTransport.transportName]=b.facadeTransport)});p[h.transportName]=h;var E;a.bootstrap_iframe=function(){var d;l.currentWindowId=r.hash.slice(1);b.attachEvent("message",function(b){if(b.source===parent&&("undefined"===typeof E&&(E=b.origin),b.origin===E)){var h;try{h=g.parse(b.data)}catch(J){n("bad json",b.data);return}if(h.windowId===l.currentWindowId)switch(h.type){case "s":var m;try{m=g.parse(h.data)}catch(J){n("bad json",h.data);break}b=m[0];h=m[1];var f=m[2];m=m[3];n(b,h,f,m);if(b!==a.version)throw Error('Incompatible SockJS! 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g=a("url-parse"),e=a("inherits"),h=a("json3"),l=a("./utils/random"),r=a("./utils/escape"),n=a("./utils/url"),k=a("./utils/event"),m=a("./utils/transport"),p=a("./utils/object"),E=a("./utils/browser"),X=a("./utils/log"),w=a("./event/event"),G=a("./event/eventtarget"),A=a("./location"),R=a("./event/close"),J=a("./event/trans-message"),S=a("./info-receiver"),u=function(){};"production"!==d.env.NODE_ENV&&(u=a("debug")("sockjs-client:main"));var T;e(b,G);b.prototype.close=function(a,c){if(a&&!(1E3===a||3E3<=a&&4999>=a))throw Error("InvalidAccessError: Invalid code");if(c&&123<c.length)throw new SyntaxError("reason argument has an invalid length");this.readyState!==b.CLOSING&&this.readyState!==b.CLOSED&&this._close(a||1E3,c||"Normal closure",!0)};b.prototype.send=function(a){"string"!==typeof a&&(a=""+a);if(this.readyState===b.CONNECTING)throw Error("InvalidStateError: The connection has not been established 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a=Math.max(this._timeout,this._rto*b.roundTrips||5E3);this._transportTimeoutId=setTimeout(this._transportTimeout.bind(this),a);u("using timeout",a);var a=n.addPath(this._transUrl,"/"+this._server+"/"+this._generateSessionId()),d=this._transportOptions[b.transportName];u("transport url",a);a=new b(a,this._transUrl,d);a.on("message",this._transportMessage.bind(this));a.once("close",this._transportClose.bind(this));a.transportName=b.transportName;this._transport=a;return}this._close(2E3,"All transports failed",!1)};b.prototype._transportTimeout=function(){u("_transportTimeout");this.readyState===b.CONNECTING&&(this._transport&&this._transport.close(),this._transportClose(2007,"Transport timed out"))};b.prototype._transportMessage=function(b){u("_transportMessage",b);var a=this,c=b.slice(0,1);b=b.slice(1);var d;switch(c){case "o":this._open();return;case "h":this.dispatchEvent(new w("heartbeat"));u("heartbeat",this.transport);return}if(b)try{d=h.parse(b)}catch(I){u("bad 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g=a("events").EventEmitter,e=a("inherits"),h=a("../../utils/event"),l=a("../../utils/url"),r=c.XMLHttpRequest,n=function(){};"production"!==d.env.NODE_ENV&&(n=a("debug")("sockjs-client:browser:xhr"));e(b,g);b.prototype._start=function(a,c,d,e){var g=this;try{this.xhr=new r}catch(A){}if(this.xhr){c=l.addQuery(c,"t\x3d"+ +new Date);this.unloadRef=h.unloadAdd(function(){n("unload cleanup");g._cleanup(!0)});try{this.xhr.open(a,c,!0),this.timeout&&"timeout"in this.xhr&&(this.xhr.timeout=this.timeout,this.xhr.ontimeout=function(){n("xhr timeout");g.emit("finish",0,"");g._cleanup(!1)})}catch(A){n("exception",A);this.emit("finish",0,"");this._cleanup(!1);return}e&&e.noCredentials||!b.supportsCORS||(n("withCredentials"),this.xhr.withCredentials=!0);if(e&&e.headers)for(var m in e.headers)this.xhr.setRequestHeader(m,e.headers[m]);this.xhr.onreadystatechange=function(){if(g.xhr){var a=g.xhr,b,c;n("readyState",a.readyState);switch(a.readyState){case 3:try{c=a.status,b=a.responseText}catch(S){}n("status",c);1223===c&&(c=204);200===c&&b&&0<b.length&&(n("chunk"),g.emit("chunk",c,b));break;case 4:c=a.status;n("status",c);1223===c&&(c=204);if(12005===c||12029===c)c=0;n("finish",c,a.responseText);g.emit("finish",c,a.responseText);g._cleanup(!1)}}};try{g.xhr.send(d)}catch(A){g.emit("finish",0,""),g._cleanup(!1)}}else n("no xhr"),this.emit("finish",0,"no xhr support"),this._cleanup()};b.prototype._cleanup=function(a){n("cleanup");if(this.xhr){this.removeAllListeners();h.unloadDel(this.unloadRef);this.xhr.onreadystatechange=function(){};this.xhr.ontimeout&&(this.xhr.ontimeout=null);if(a)try{this.xhr.abort()}catch(p){}this.unloadRef=this.xhr=null}};b.prototype.close=function(){n("close");this._cleanup(!0)};b.enabled=!!r;var k=["Active"].concat("Object").join("X");!b.enabled&&k in c&&(n("overriding xmlhttprequest"),r=function(){try{return new c[k]("Microsoft.XMLHTTP")}catch(m){return null}},b.enabled=!!new r);e=!1;try{e="withCredentials"in new r}catch(m){}b.supportsCORS=e;f.exports=b}).call(this,{env:{}},"undefined"!==typeof global?global:"undefined"!==typeof self?self:"undefined"!==typeof window?window:{})},{"../../utils/event":46,"../../utils/url":52,debug:55,events:3,inherits:57}],18:[function(a,f,k){f.exports=("undefined"!==typeof global?global:"undefined"!==typeof self?self:"undefined"!==typeof window?window:{}).EventSource},{}],19:[function(a,f,k){(function(a){var c=a.WebSocket||a.MozWebSocket;f.exports=c?function(a){return new c(a)}:void 0}).call(this,"undefined"!==typeof global?global:"undefined"!==typeof self?self:"undefined"!==typeof window?window:{})},{}],20:[function(a,f,k){function d(a){if(!d.enabled())throw Error("Transport created when disabled");c.call(this,a,"/eventsource",b,g)}k=a("inherits");var c=a("./lib/ajax-based"),b=a("./receiver/eventsource"),g=a("./sender/xhr-cors"),e=a("eventsource");k(d,c);d.enabled=function(){return!!e};d.transportName="eventsource";d.roundTrips=2;f.exports=d},{"./lib/ajax-based":24,"./receiver/eventsource":29,"./sender/xhr-cors":35,eventsource:18,inherits:57}],21:[function(a,f,k){function d(a){if(!c.enabled)throw Error("Transport created when disabled");g.call(this,a,"/htmlfile",c,b)}k=a("inherits");var c=a("./receiver/htmlfile"),b=a("./sender/xhr-local"),g=a("./lib/ajax-based");k(d,g);d.enabled=function(a){return c.enabled&&a.sameOrigin};d.transportName="htmlfile";d.roundTrips=2;f.exports=d},{"./lib/ajax-based":24,"./receiver/htmlfile":30,"./sender/xhr-local":37,inherits:57}],22:[function(a,f,k){(function(d){function c(a,b,d){if(!c.enabled())throw Error("Transport created when disabled");e.call(this);var h=this;this.origin=l.getOrigin(d);this.baseUrl=d;this.transUrl=b;this.transport=a;this.windowId=k.string(8);d=l.addPath(d,"/iframe.html")+"#"+this.windowId;m(a,b,d);this.iframeObj=r.createIframe(d,function(a){m("err callback");h.emit("close",1006,"Unable to load an iframe ("+a+")");h.close()});this.onmessageCallback=this._message.bind(this);n.attachEvent("message",this.onmessageCallback)}var b=a("inherits"),g=a("json3"),e=a("events").EventEmitter,h=a("../version"),l=a("../utils/url"),r=a("../utils/iframe"),n=a("../utils/event"),k=a("../utils/random"),m=function(){};"production"!==d.env.NODE_ENV&&(m=a("debug")("sockjs-client:transport:iframe"));b(c,e);c.prototype.close=function(){m("close");this.removeAllListeners();if(this.iframeObj){n.detachEvent("message",this.onmessageCallback);try{this.postMessage("c")}catch(p){}this.iframeObj.cleanup();this.onmessageCallback=this.iframeObj=null}};c.prototype._message=function(a){m("message",a.data);if(l.isOriginEqual(a.origin,this.origin)){var b;try{b=g.parse(a.data)}catch(w){m("bad json",a.data);return}if(b.windowId!==this.windowId)m("mismatched window id",b.windowId,this.windowId);else switch(b.type){case "s":this.iframeObj.loaded();this.postMessage("s",g.stringify([h,this.transport,this.transUrl,this.baseUrl]));break;case "t":this.emit("message",b.data);break;case "c":var c;try{c=g.parse(b.data)}catch(w){m("bad json",b.data);break}this.emit("close",c[0],c[1]);this.close()}}else m("not same origin",a.origin,this.origin)};c.prototype.postMessage=function(a,b){m("postMessage",a,b);this.iframeObj.post(g.stringify({windowId:this.windowId,type:a,data:b||""}),this.origin)};c.prototype.send=function(a){m("send",a);this.postMessage("m",a)};c.enabled=function(){return r.iframeEnabled};c.transportName="iframe";c.roundTrips=2;f.exports=c}).call(this,{env:{}})},{"../utils/event":46,"../utils/iframe":47,"../utils/random":50,"../utils/url":52,"../version":53,debug:55,events:3,inherits:57,json3:58}],23:[function(a,f,k){(function(d){function c(a){if(!c.enabled())throw Error("Transport created when disabled");g.call(this,a,"/jsonp",h,e)}var b=a("inherits"),g=a("./lib/sender-receiver"),e=a("./receiver/jsonp"),h=a("./sender/jsonp");b(c,g);c.enabled=function(){return!!d.document};c.transportName="jsonp-polling";c.roundTrips=1;c.needBody=!0;f.exports=c}).call(this,"undefined"!==typeof global?global:"undefined"!==typeof self?self:"undefined"!==typeof window?window:{})},{"./lib/sender-receiver":28,"./receiver/jsonp":31,"./sender/jsonp":33,inherits:57}],24:[function(a,f,k){(function(d){function c(a){return function(b,c,d){l("create ajax sender",b,c);var h={};"string"===typeof c&&(h.headers={"Content-type":"text/plain"});b=e.addPath(b,"/xhr_send");var g=new 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a=this,b;this.sendStop=function(){e("sendStop");a.sendStop=null;clearTimeout(b)};b=setTimeout(function(){e("timeout");a.sendStop=null;a.sendSchedule()},25)};c.prototype.sendSchedule=function(){e("sendSchedule",this.sendBuffer.length);var a=this;if(0<this.sendBuffer.length){var b="["+this.sendBuffer.join(",")+"]";this.sendStop=this.sender(this.url,b,function(b){a.sendStop=null;b?(e("error",b),a.emit("close",b.code||1006,"Sending error: "+b),a.close()):a.sendScheduleWait()});this.sendBuffer=[]}};c.prototype._cleanup=function(){e("_cleanup");this.removeAllListeners()};c.prototype.close=function(){e("close");this._cleanup();this.sendStop&&(this.sendStop(),this.sendStop=null)};f.exports=c}).call(this,{env:{}})},{debug:55,events:3,inherits:57}],26:[function(a,f,k){(function(d){var c=a("inherits"),b=a("../iframe"),g=a("../../utils/object");f.exports=function(a){function e(c,d){b.call(this,a.transportName,c,d)}c(e,b);e.enabled=function(c,e){if(!d.document)return!1;var 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b=a("inherits"),g=a("../../utils/url"),e=a("./buffered-sender"),h=a("./polling"),l=function(){};"production"!==d.env.NODE_ENV&&(l=a("debug")("sockjs-client:sender-receiver"));b(c,e);c.prototype.close=function(){e.prototype.close.call(this);l("close");this.removeAllListeners();this.poll&&(this.poll.abort(),this.poll=null)};f.exports=c}).call(this,{env:{}})},{"../../utils/url":52,"./buffered-sender":25,"./polling":27,debug:55,inherits:57}],29:[function(a,f,k){(function(d){function c(a){h(a);g.call(this);var b=this,c=this.es=new e(a);c.onmessage=function(a){h("message",a.data);b.emit("message",decodeURI(a.data))};c.onerror=function(a){h("error",c.readyState,a);a=2!==c.readyState?"network":"permanent";b._cleanup();b._close(a)}}var b=a("inherits"),g=a("events").EventEmitter,e=a("eventsource"),h=function(){};"production"!==d.env.NODE_ENV&&(h=a("debug")("sockjs-client:receiver:eventsource"));b(c,g);c.prototype.abort=function(){h("abort");this._cleanup();this._close("user")};c.prototype._cleanup=function(){h("cleanup");var a=this.es;a&&(a.onmessage=a.onerror=null,a.close(),this.es=null)};c.prototype._close=function(a){h("close",a);var b=this;setTimeout(function(){b.emit("close",null,a);b.removeAllListeners()},200)};f.exports=c}).call(this,{env:{}})},{debug:55,events:3,eventsource:18,inherits:57}],30:[function(a,f,k){(function(d,c){function b(a){n(a);l.call(this);var d=this;e.polluteGlobalNamespace();this.id="a"+k.string(6);a=h.addQuery(a,"c\x3d"+decodeURIComponent(e.WPrefix+"."+this.id));n("using htmlfile",b.htmlfileEnabled);var g=b.htmlfileEnabled?e.createHtmlfile:e.createIframe;c[e.WPrefix][this.id]={start:function(){n("start");d.iframeObj.loaded()},message:function(a){n("message",a);d.emit("message",a)},stop:function(){n("stop");d._cleanup();d._close("network")}};this.iframeObj=g(a,function(){n("callback");d._cleanup();d._close("permanent")})}var g=a("inherits"),e=a("../../utils/iframe"),h=a("../../utils/url"),l=a("events").EventEmitter,k=a("../../utils/random"),n=function(){};"production"!==d.env.NODE_ENV&&(n=a("debug")("sockjs-client:receiver:htmlfile"));g(b,l);b.prototype.abort=function(){n("abort");this._cleanup();this._close("user")};b.prototype._cleanup=function(){n("_cleanup");this.iframeObj&&(this.iframeObj.cleanup(),this.iframeObj=null);delete c[e.WPrefix][this.id]};b.prototype._close=function(a){n("_close",a);this.emit("close",null,a);this.removeAllListeners()};b.htmlfileEnabled=!1;g=["Active"].concat("Object").join("X");if(g in c)try{b.htmlfileEnabled=!!new c[g]("htmlfile")}catch(t){}b.enabled=b.htmlfileEnabled||e.iframeEnabled;f.exports=b}).call(this,{env:{}},"undefined"!==typeof global?global:"undefined"!==typeof self?self:"undefined"!==typeof window?window:{})},{"../../utils/iframe":47,"../../utils/random":50,"../../utils/url":52,debug:55,events:3,inherits:57}],31:[function(a,f,k){(function(d,c){function b(a){t(a);var d=this;n.call(this);g.polluteGlobalNamespace();this.id="a"+e.string(6);a=l.addQuery(a,"c\x3d"+encodeURIComponent(g.WPrefix+"."+this.id));c[g.WPrefix][this.id]=this._callback.bind(this);this._createScript(a);this.timeoutId=setTimeout(function(){t("timeout");d._abort(Error("JSONP script loaded abnormally (timeout)"))},b.timeout)}var g=a("../../utils/iframe"),e=a("../../utils/random"),h=a("../../utils/browser"),l=a("../../utils/url"),k=a("inherits"),n=a("events").EventEmitter,t=function(){};"production"!==d.env.NODE_ENV&&(t=a("debug")("sockjs-client:receiver:jsonp"));k(b,n);b.prototype.abort=function(){t("abort");if(c[g.WPrefix][this.id]){var a=Error("JSONP user aborted read");a.code=1E3;this._abort(a)}};b.timeout=35E3;b.scriptErrorTimeout=1E3;b.prototype._callback=function(a){t("_callback",a);this._cleanup();this.aborting||(a&&(t("message",a),this.emit("message",a)),this.emit("close",null,"network"),this.removeAllListeners())};b.prototype._abort=function(a){t("_abort",a);this._cleanup();this.aborting=!0;this.emit("close",a.code,a.message);this.removeAllListeners()};b.prototype._cleanup=function(){t("_cleanup");clearTimeout(this.timeoutId);this.script2&&(this.script2.parentNode.removeChild(this.script2),this.script2=null);if(this.script){var a=this.script;a.parentNode.removeChild(a);this.script=a.onreadystatechange=a.onerror=a.onload=a.onclick=null}delete c[g.WPrefix][this.id]};b.prototype._scriptError=function(){t("_scriptError");var a=this;this.errorTimer||(this.errorTimer=setTimeout(function(){a.loadedOkay||a._abort(Error("JSONP script loaded abnormally (onerror)"))},b.scriptErrorTimeout))};b.prototype._createScript=function(a){t("_createScript",a);var b=this,d=this.script=c.document.createElement("script"),g;d.id="a"+e.string(8);d.src=a;d.type="text/javascript";d.charset="UTF-8";d.onerror=this._scriptError.bind(this);d.onload=function(){t("onload");b._abort(Error("JSONP script loaded abnormally (onload)"))};d.onreadystatechange=function(){t("onreadystatechange",d.readyState);if(/loaded|closed/.test(d.readyState)){if(d&&d.htmlFor&&d.onclick){b.loadedOkay=!0;try{d.onclick()}catch(w){}}d&&b._abort(Error("JSONP script loaded abnormally (onreadystatechange)"))}};if("undefined"===typeof d.async&&c.document.attachEvent)if(h.isOpera())g=this.script2=c.document.createElement("script"),g.text="try{var a \x3d document.getElementById('"+d.id+"'); if(a)a.onerror();}catch(x){};",d.async=g.async=!1;else{try{d.htmlFor=d.id,d.event="onclick"}catch(w){}d.async=!0}"undefined"!==typeof d.async&&(d.async=!0);a=c.document.getElementsByTagName("head")[0];a.insertBefore(d,a.firstChild);g&&a.insertBefore(g,a.firstChild)};f.exports=b}).call(this,{env:{}},"undefined"!==typeof global?global:"undefined"!==typeof self?self:"undefined"!==typeof window?window:{})},{"../../utils/browser":44,"../../utils/iframe":47,"../../utils/random":50,"../../utils/url":52,debug:55,events:3,inherits:57}],32:[function(a,f,k){(function(d){function c(a,b){e(a);g.call(this);var c=this;this.bufferPosition=0;this.xo=new b("POST",a,null);this.xo.on("chunk",this._chunkHandler.bind(this));this.xo.once("finish",function(a,b){e("finish",a,b);c._chunkHandler(a,b);c.xo=null;var d=200===a?"network":"permanent";e("close",d);c.emit("close",null,d);c._cleanup()})}var b=a("inherits"),g=a("events").EventEmitter,e=function(){};"production"!==d.env.NODE_ENV&&(e=a("debug")("sockjs-client:receiver:xhr"));b(c,g);c.prototype._chunkHandler=function(a,b){e("_chunkHandler",a);if(200===a&&b)for(var c;;this.bufferPosition+=c+1){var d=b.slice(this.bufferPosition);c=d.indexOf("\n");if(-1===c)break;if(d=d.slice(0,c))e("message",d),this.emit("message",d)}};c.prototype._cleanup=function(){e("_cleanup");this.removeAllListeners()};c.prototype.abort=function(){e("abort");this.xo&&(this.xo.close(),e("close"),this.emit("close",null,"user"),this.xo=null);this._cleanup()};f.exports=c}).call(this,{env:{}})},{debug:55,events:3,inherits:57}],33:[function(a,f,k){(function(d,c){function b(a){h("createIframe",a);try{return c.document.createElement('\x3ciframe name\x3d"'+a+'"\x3e')}catch(m){var b=c.document.createElement("iframe");b.name=a;return b}}var 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