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  1. !function(t,e){"object"==typeof exports&&"object"==typeof module?module.exports=e(require("JSON")):"function"==typeof define&&define.amd?define(["JSON"],e):"object"==typeof exports?exports.io=e(require("JSON")):t.io=e(t.JSON)}(this,function(t){return function(t){function e(n){if(r[n])return r[n].exports;var o=r[n]={exports:{},id:n,loaded:!1};return t[n].call(o.exports,o,o.exports,e),o.loaded=!0,o.exports}var r={};return e.m=t,e.c=r,e.p="",e(0)}([function(t,e,r){"use strict";function n(t,e){"object"===("undefined"==typeof t?"undefined":i(t))&&(e=t,t=void 0),e=e||{};var r,n=s(t),a=n.source,p=n.id,u=n.path,f=h[p]&&u in h[p].nsps,l=e.forceNew||e["force new connection"]||!1===e.multiplex||f;return l?r=c(a,e):(h[p]||(h[p]=c(a,e)),r=h[p]),n.query&&!e.query?e.query=n.query:e&&"object"===i(e.query)&&(e.query=o(e.query)),r.socket(n.path,e)}function o(t){var e=[];for(var r in t)t.hasOwnProperty(r)&&e.push(encodeURIComponent(r)+"="+encodeURIComponent(t[r]));return e.join("&")}var 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t=this.engine;this.subs.push(h(t,"data",p(this,"ondata"))),this.subs.push(h(t,"ping",p(this,"onping"))),this.subs.push(h(t,"pong",p(this,"onpong"))),this.subs.push(h(t,"error",p(this,"onerror"))),this.subs.push(h(t,"close",p(this,"onclose"))),this.subs.push(h(this.decoder,"decoded",p(this,"ondecoded")))},n.prototype.onping=function(){this.lastPing=new Date,this.emitAll("ping")},n.prototype.onpong=function(){this.emitAll("pong",new Date-this.lastPing)},n.prototype.ondata=function(t){this.decoder.add(t)},n.prototype.ondecoded=function(t){this.emit("packet",t)},n.prototype.onerror=function(t){this.emitAll("error",t)},n.prototype.socket=function(t,e){function r(){~u(o.connecting,n)||o.connecting.push(n)}var n=this.nsps[t];if(!n){n=new s(this,t,e),this.nsps[t]=n;var o=this;n.on("connecting",r),n.on("connect",function(){n.id=o.engine.id}),this.autoConnect&&r()}return n},n.prototype.destroy=function(t){var 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r=this.subs.shift();r.destroy()}this.packetBuffer=[],this.encoding=!1,this.lastPing=null,this.decoder.destroy()},n.prototype.close=n.prototype.disconnect=function(){this.skipReconnect=!0,this.reconnecting=!1,"opening"===this.readyState&&this.cleanup(),this.backoff.reset(),this.readyState="closed",this.engine&&this.engine.close()},n.prototype.onclose=function(t){this.cleanup(),this.backoff.reset(),this.readyState="closed",this.emit("close",t),this._reconnection&&!this.skipReconnect&&this.reconnect()},n.prototype.reconnect=function(){if(this.reconnecting||this.skipReconnect)return this;var t=this;if(this.backoff.attempts>=this._reconnectionAttempts)this.backoff.reset(),this.emitAll("reconnect_failed"),this.reconnecting=!1;else{var e=this.backoff.duration();this.reconnecting=!0;var r=setTimeout(function(){t.skipReconnect||(t.emitAll("reconnect_attempt",t.backoff.attempts),t.emitAll("reconnecting",t.backoff.attempts),t.skipReconnect||t.open(function(e){e?(t.reconnecting=!1,t.reconnect(),t.emitAll("reconnect_error",e.data)):t.onreconnect()}))},e);this.subs.push({destroy:function(){clearTimeout(r)}})}},n.prototype.onreconnect=function(){var t=this.backoff.attempts;this.reconnecting=!1,this.backoff.reset(),this.updateSocketIds(),this.emitAll("reconnect",t)}},function(t,e,r){t.exports=r(12)},function(t,e,r){t.exports=r(13),t.exports.parser=r(20)},function(t,e,r){(function(e){function n(t,r){if(!(this instanceof n))return new n(t,r);r=r||{},t&&"object"==typeof 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this.query&&(this.query=u.decode(this.query)),this.upgrade=!1!==r.upgrade,this.path=(r.path||"/engine.io").replace(/\/$/,"")+"/",this.forceJSONP=!!r.forceJSONP,this.jsonp=!1!==r.jsonp,this.forceBase64=!!r.forceBase64,this.enablesXDR=!!r.enablesXDR,this.timestampParam=r.timestampParam||"t",this.timestampRequests=r.timestampRequests,this.transports=r.transports||["polling","websocket"],this.readyState="",this.writeBuffer=[],this.prevBufferLen=0,this.policyPort=r.policyPort||843,this.rememberUpgrade=r.rememberUpgrade||!1,this.binaryType=null,this.onlyBinaryUpgrades=r.onlyBinaryUpgrades,this.perMessageDeflate=!1!==r.perMessageDeflate&&(r.perMessageDeflate||{}),!0===this.perMessageDeflate&&(this.perMessageDeflate={}),this.perMessageDeflate&&null==this.perMessageDeflate.threshold&&(this.perMessageDeflate.threshold=1024),this.pfx=r.pfx||null,this.key=r.key||null,this.passphrase=r.passphrase||null,this.cert=r.cert||null,this.ca=r.ca||null,this.ciphers=r.ciphers||null,this.rejectUnauthorized=void 0===r.rejectUnauthorized?null:r.rejectUnauthorized,this.forceNode=!!r.forceNode;var o="object"==typeof e&&e;o.global===o&&(r.extraHeaders&&Object.keys(r.extraHeaders).length>0&&(this.extraHeaders=r.extraHeaders),r.localAddress&&(this.localAddress=r.localAddress)),this.id=null,this.upgrades=null,this.pingInterval=null,this.pingTimeout=null,this.pingIntervalTimer=null,this.pingTimeoutTimer=null,this.open()}function o(t){var e={};for(var r in t)t.hasOwnProperty(r)&&(e[r]=t[r]);return e}var i=r(14),s=r(29),a=(r(3)("engine.io-client:socket"),r(36)),c=r(20),h=r(2),p=r(37),u=r(30);t.exports=n,n.priorWebsocketSuccess=!1,s(n.prototype),n.protocol=c.protocol,n.Socket=n,n.Transport=r(19),n.transports=r(14),n.parser=r(20),n.prototype.createTransport=function(t){var e=o(this.query);e.EIO=c.protocol,e.transport=t,this.id&&(e.sid=this.id);var r=new i[t]({agent:this.agent,hostname:this.hostname,port:this.port,secure:this.secure,path:this.path,query:e,forceJSONP:this.forceJSONP,jsonp:this.jsonp,forceBase64:this.forceBase64,enablesXDR:this.enablesXDR,timestampRequests:this.timestampRequests,timestampParam:this.timestampParam,policyPort:this.policyPort,socket:this,pfx:this.pfx,key:this.key,passphrase:this.passphrase,cert:this.cert,ca:this.ca,ciphers:this.ciphers,rejectUnauthorized:this.rejectUnauthorized,perMessageDeflate:this.perMessageDeflate,extraHeaders:this.extraHeaders,forceNode:this.forceNode,localAddress:this.localAddress});return r},n.prototype.open=function(){var t;if(this.rememberUpgrade&&n.priorWebsocketSuccess&&this.transports.indexOf("websocket")!==-1)t="websocket";else{if(0===this.transports.length){var e=this;return void setTimeout(function(){e.emit("error","No transports available")},0)}t=this.transports[0]}this.readyState="opening";try{t=this.createTransport(t)}catch(t){return this.transports.shift(),void this.open()}t.open(),this.setTransport(t)},n.prototype.setTransport=function(t){var e=this;this.transport&&this.transport.removeAllListeners(),this.transport=t,t.on("drain",function(){e.onDrain()}).on("packet",function(t){e.onPacket(t)}).on("error",function(t){e.onError(t)}).on("close",function(){e.onClose("transport close")})},n.prototype.probe=function(t){function e(){if(u.onlyBinaryUpgrades){var t=!this.supportsBinary&&u.transport.supportsBinary;p=p||t}p||(h.send([{type:"ping",data:"probe"}]),h.once("packet",function(t){if(!p)if("pong"===t.type&&"probe"===t.data){if(u.upgrading=!0,u.emit("upgrading",h),!h)return;n.priorWebsocketSuccess="websocket"===h.name,u.transport.pause(function(){p||"closed"!==u.readyState&&(c(),u.setTransport(h),h.send([{type:"upgrade"}]),u.emit("upgrade",h),h=null,u.upgrading=!1,u.flush())})}else{var e=new Error("probe error");e.transport=h.name,u.emit("upgradeError",e)}}))}function r(){p||(p=!0,c(),h.close(),h=null)}function o(t){var e=new Error("probe error: "+t);e.transport=h.name,r(),u.emit("upgradeError",e)}function i(){o("transport closed")}function s(){o("socket closed")}function a(t){h&&t.name!==h.name&&r()}function c(){h.removeListener("open",e),h.removeListener("error",o),h.removeListener("close",i),u.removeListener("close",s),u.removeListener("upgrading",a)}var h=this.createTransport(t,{probe:1}),p=!1,u=this;n.priorWebsocketSuccess=!1,h.once("open",e),h.once("error",o),h.once("close",i),this.once("close",s),this.once("upgrading",a),h.open()},n.prototype.onOpen=function(){if(this.readyState="open",n.priorWebsocketSuccess="websocket"===this.transport.name,this.emit("open"),this.flush(),"open"===this.readyState&&this.upgrade&&this.transport.pause)for(var t=0,e=this.upgrades.length;t<e;t++)this.probe(this.upgrades[t])},n.prototype.onPacket=function(t){if("opening"===this.readyState||"open"===this.readyState||"closing"===this.readyState)switch(this.emit("packet",t),this.emit("heartbeat"),t.type){case"open":this.onHandshake(p(t.data));break;case"pong":this.setPing(),this.emit("pong");break;case"error":var e=new Error("server error");e.code=t.data,this.onError(e);break;case"message":this.emit("data",t.data),this.emit("message",t.data)}},n.prototype.onHandshake=function(t){this.emit("handshake",t),this.id=t.sid,this.transport.query.sid=t.sid,this.upgrades=this.filterUpgrades(t.upgrades),this.pingInterval=t.pingInterval,this.pingTimeout=t.pingTimeout,this.onOpen(),"closed"!==this.readyState&&(this.setPing(),this.removeListener("heartbeat",this.onHeartbeat),this.on("heartbeat",this.onHeartbeat))},n.prototype.onHeartbeat=function(t){clearTimeout(this.pingTimeoutTimer);var e=this;e.pingTimeoutTimer=setTimeout(function(){"closed"!==e.readyState&&e.onClose("ping timeout")},t||e.pingInterval+e.pingTimeout)},n.prototype.setPing=function(){var t=this;clearTimeout(t.pingIntervalTimer),t.pingIntervalTimer=setTimeout(function(){t.ping(),t.onHeartbeat(t.pingTimeout)},t.pingInterval)},n.prototype.ping=function(){var t=this;this.sendPacket("ping",function(){t.emit("ping")})},n.prototype.onDrain=function(){this.writeBuffer.splice(0,this.prevBufferLen),this.prevBufferLen=0,0===this.writeBuffer.length?this.emit("drain"):this.flush()},n.prototype.flush=function(){"closed"!==this.readyState&&this.transport.writable&&!this.upgrading&&this.writeBuffer.length&&(this.transport.send(this.writeBuffer),this.prevBufferLen=this.writeBuffer.length,this.emit("flush"))},n.prototype.write=n.prototype.send=function(t,e,r){return this.sendPacket("message",t,e,r),this},n.prototype.sendPacket=function(t,e,r,n){if("function"==typeof e&&(n=e,e=void 0),"function"==typeof r&&(n=r,r=null),"closing"!==this.readyState&&"closed"!==this.readyState){r=r||{},r.compress=!1!==r.compress;var o={type:t,data:e,options:r};this.emit("packetCreate",o),this.writeBuffer.push(o),n&&this.once("flush",n),this.flush()}},n.prototype.close=function(){function t(){n.onClose("forced close"),n.transport.close()}function e(){n.removeListener("upgrade",e),n.removeListener("upgradeError",e),t()}function r(){n.once("upgrade",e),n.once("upgradeError",e)}if("opening"===this.readyState||"open"===this.readyState){this.readyState="closing";var n=this;this.writeBuffer.length?this.once("drain",function(){this.upgrading?r():t()}):this.upgrading?r():t()}return this},n.prototype.onError=function(t){n.priorWebsocketSuccess=!1,this.emit("error",t),this.onClose("transport error",t)},n.prototype.onClose=function(t,e){if("opening"===this.readyState||"open"===this.readyState||"closing"===this.readyState){var r=this;clearTimeout(this.pingIntervalTimer),clearTimeout(this.pingTimeoutTimer),this.transport.removeAllListeners("close"),this.transport.close(),this.transport.removeAllListeners(),this.readyState="closed",this.id=null,this.emit("close",t,e),r.writeBuffer=[],r.prevBufferLen=0}},n.prototype.filterUpgrades=function(t){for(var e=[],r=0,n=t.length;r<n;r++)~a(this.transports,t[r])&&e.push(t[r]);return e}}).call(e,function(){return this}())},function(t,e,r){(function(t){function n(e){var r,n=!1,a=!1,c=!1!==e.jsonp;if(t.location){var h="https:"===location.protocol,p=location.port;p||(p=h?443:80),n=e.hostname!==location.hostname||p!==e.port,a=e.secure!==h}if(e.xdomain=n,e.xscheme=a,r=new o(e),"open"in r&&!e.forceJSONP)return new i(e);if(!c)throw new Error("JSONP disabled");return new s(e)}var o=r(15),i=r(17),s=r(33),a=r(34);e.polling=n,e.websocket=a}).call(e,function(){return this}())},function(t,e,r){(function(e){var n=r(16);t.exports=function(t){var r=t.xdomain,o=t.xscheme,i=t.enablesXDR;try{if("undefined"!=typeof XMLHttpRequest&&(!r||n))return new XMLHttpRequest}catch(t){}try{if("undefined"!=typeof XDomainRequest&&!o&&i)return new XDomainRequest}catch(t){}if(!r)try{return new(e[["Active"].concat("Object").join("X")])("Microsoft.XMLHTTP")}catch(t){}}}).call(e,function(){return this}())},function(t,e){try{t.exports="undefined"!=typeof XMLHttpRequest&&"withCredentials"in new XMLHttpRequest}catch(e){t.exports=!1}},function(t,e,r){(function(e){function n(){}function o(t){if(c.call(this,t),this.requestTimeout=t.requestTimeout,e.location){var r="https:"===location.protocol,n=location.port;n||(n=r?443:80),this.xd=t.hostname!==e.location.hostname||n!==t.port,this.xs=t.secure!==r}else this.extraHeaders=t.extraHeaders}function i(t){this.method=t.method||"GET",this.uri=t.uri,this.xd=!!t.xd,this.xs=!!t.xs,this.async=!1!==t.async,this.data=void 0!==t.data?t.data:null,this.agent=t.agent,this.isBinary=t.isBinary,this.supportsBinary=t.supportsBinary,this.enablesXDR=t.enablesXDR,this.requestTimeout=t.requestTimeout,this.pfx=t.pfx,this.key=t.key,this.passphrase=t.passphrase,this.cert=t.cert,this.ca=t.ca,this.ciphers=t.ciphers,this.rejectUnauthorized=t.rejectUnauthorized,this.extraHeaders=t.extraHeaders,this.create()}function s(){for(var t in i.requests)i.requests.hasOwnProperty(t)&&i.requests[t].abort()}var a=r(15),c=r(18),h=r(29),p=r(31);r(3)("engine.io-client:polling-xhr");t.exports=o,t.exports.Request=i,p(o,c),o.prototype.supportsBinary=!0,o.prototype.request=function(t){return t=t||{},t.uri=this.uri(),t.xd=this.xd,t.xs=this.xs,t.agent=this.agent||!1,t.supportsBinary=this.supportsBinary,t.enablesXDR=this.enablesXDR,t.pfx=this.pfx,t.key=this.key,t.passphrase=this.passphrase,t.cert=this.cert,t.ca=this.ca,t.ciphers=this.ciphers,t.rejectUnauthorized=this.rejectUnauthorized,t.requestTimeout=this.requestTimeout,t.extraHeaders=this.extraHeaders,new i(t)},o.prototype.doWrite=function(t,e){var r="string"!=typeof t&&void 0!==t,n=this.request({method:"POST",data:t,isBinary:r}),o=this;n.on("success",e),n.on("error",function(t){o.onError("xhr post error",t)}),this.sendXhr=n},o.prototype.doPoll=function(){var t=this.request(),e=this;t.on("data",function(t){e.onData(t)}),t.on("error",function(t){e.onError("xhr poll error",t)}),this.pollXhr=t},h(i.prototype),i.prototype.create=function(){var t={agent:this.agent,xdomain:this.xd,xscheme:this.xs,enablesXDR:this.enablesXDR};t.pfx=this.pfx,t.key=this.key,t.passphrase=this.passphrase,t.cert=this.cert,t.ca=this.ca,t.ciphers=this.ciphers,t.rejectUnauthorized=this.rejectUnauthorized;var r=this.xhr=new a(t),n=this;try{r.open(this.method,this.uri,this.async);try{if(this.extraHeaders){r.setDisableHeaderCheck(!0);for(var o in this.extraHeaders)this.extraHeaders.hasOwnProperty(o)&&r.setRequestHeader(o,this.extraHeaders[o])}}catch(t){}if(this.supportsBinary&&(r.responseType="arraybuffer"),"POST"===this.method)try{this.isBinary?r.setRequestHeader("Content-type","application/octet-stream"):r.setRequestHeader("Content-type","text/plain;charset=UTF-8")}catch(t){}try{r.setRequestHeader("Accept","*/*")}catch(t){}"withCredentials"in r&&(r.withCredentials=!0),this.requestTimeout&&(r.timeout=this.requestTimeout),this.hasXDR()?(r.onload=function(){n.onLoad()},r.onerror=function(){n.onError(r.responseText)}):r.onreadystatechange=function(){4===r.readyState&&(200===r.status||1223===r.status?n.onLoad():setTimeout(function(){n.onError(r.status)},0))},r.send(this.data)}catch(t){return void setTimeout(function(){n.onError(t)},0)}e.document&&(this.index=i.requestsCount++,i.requests[this.index]=this)},i.prototype.onSuccess=function(){this.emit("success"),this.cleanup()},i.prototype.onData=function(t){this.emit("data",t),this.onSuccess()},i.prototype.onError=function(t){this.emit("error",t),this.cleanup(!0)},i.prototype.cleanup=function(t){if("undefined"!=typeof this.xhr&&null!==this.xhr){if(this.hasXDR()?this.xhr.onload=this.xhr.onerror=n:this.xhr.onreadystatechange=n,t)try{this.xhr.abort()}catch(t){}e.document&&delete i.requests[this.index],this.xhr=null}},i.prototype.onLoad=function(){var t;try{var e;try{e=this.xhr.getResponseHeader("Content-Type").split(";")[0]}catch(t){}if("application/octet-stream"===e)t=this.xhr.response||this.xhr.responseText;else if(this.supportsBinary)try{t=String.fromCharCode.apply(null,new Uint8Array(this.xhr.response))}catch(e){for(var r=new Uint8Array(this.xhr.response),n=[],o=0,i=r.length;o<i;o++)n.push(r[o]);t=String.fromCharCode.apply(null,n)}else t=this.xhr.responseText}catch(t){this.onError(t)}null!=t&&this.onData(t)},i.prototype.hasXDR=function(){return"undefined"!=typeof e.XDomainRequest&&!this.xs&&this.enablesXDR},i.prototype.abort=function(){this.cleanup()},i.requestsCount=0,i.requests={},e.document&&(e.attachEvent?e.attachEvent("onunload",s):e.addEventListener&&e.addEventListener("beforeunload",s,!1))}).call(e,function(){return this}())},function(t,e,r){function n(t){var e=t&&t.forceBase64;h&&!e||(this.supportsBinary=!1),o.call(this,t)}var o=r(19),i=r(30),s=r(20),a=r(31),c=r(32);r(3)("engine.io-client:polling");t.exports=n;var h=function(){var t=r(15),e=new t({xdomain:!1});return null!=e.responseType}();a(n,o),n.prototype.name="polling",n.prototype.doOpen=function(){this.poll()},n.prototype.pause=function(t){function e(){r.readyState="paused",t()}var r=this;if(this.readyState="pausing",this.polling||!this.writable){var n=0;this.polling&&(n++,this.once("pollComplete",function(){--n||e()})),this.writable||(n++,this.once("drain",function(){--n||e()}))}else e()},n.prototype.poll=function(){this.polling=!0,this.doPoll(),this.emit("poll")},n.prototype.onData=function(t){var e=this,r=function(t,r,n){return"opening"===e.readyState&&e.onOpen(),"close"===t.type?(e.onClose(),!1):void e.onPacket(t)};s.decodePayload(t,this.socket.binaryType,r),"closed"!==this.readyState&&(this.polling=!1,this.emit("pollComplete"),"open"===this.readyState&&this.poll())},n.prototype.doClose=function(){function t(){e.write([{type:"close"}])}var e=this;"open"===this.readyState?t():this.once("open",t)},n.prototype.write=function(t){var e=this;this.writable=!1;var r=function(){e.writable=!0,e.emit("drain")};s.encodePayload(t,this.supportsBinary,function(t){e.doWrite(t,r)})},n.prototype.uri=function(){var t=this.query||{},e=this.secure?"https":"http",r="";!1!==this.timestampRequests&&(t[this.timestampParam]=c()),this.supportsBinary||t.sid||(t.b64=1),t=i.encode(t),this.port&&("https"===e&&443!==Number(this.port)||"http"===e&&80!==Number(this.port))&&(r=":"+this.port),t.length&&(t="?"+t);var n=this.hostname.indexOf(":")!==-1;return e+"://"+(n?"["+this.hostname+"]":this.hostname)+r+this.path+t}},function(t,e,r){function n(t){this.path=t.path,this.hostname=t.hostname,this.port=t.port,this.secure=t.secure,this.query=t.query,this.timestampParam=t.timestampParam,this.timestampRequests=t.timestampRequests,this.readyState="",this.agent=t.agent||!1,this.socket=t.socket,this.enablesXDR=t.enablesXDR,this.pfx=t.pfx,this.key=t.key,this.passphrase=t.passphrase,this.cert=t.cert,this.ca=t.ca,this.ciphers=t.ciphers,this.rejectUnauthorized=t.rejectUnauthorized,this.forceNode=t.forceNode,this.extraHeaders=t.extraHeaders,this.localAddress=t.localAddress}var o=r(20),i=r(29);t.exports=n,i(n.prototype),n.prototype.onError=function(t,e){var r=new Error(t);return r.type="TransportError",r.description=e,this.emit("error",r),this},n.prototype.open=function(){return"closed"!==this.readyState&&""!==this.readyState||(this.readyState="opening",this.doOpen()),this},n.prototype.close=function(){return"opening"!==this.readyState&&"open"!==this.readyState||(this.doClose(),this.onClose()),this},n.prototype.send=function(t){if("open"!==this.readyState)throw new Error("Transport not open");this.write(t)},n.prototype.onOpen=function(){this.readyState="open",this.writable=!0,this.emit("open")},n.prototype.onData=function(t){var e=o.decodePacket(t,this.socket.binaryType);this.onPacket(e)},n.prototype.onPacket=function(t){this.emit("packet",t)},n.prototype.onClose=function(){this.readyState="closed",this.emit("close")}},function(t,e,r){(function(t){function n(t,r){var n="b"+e.packets[t.type]+t.data.data;return r(n)}function o(t,r,n){if(!r)return e.encodeBase64Packet(t,n);var o=t.data,i=new Uint8Array(o),s=new Uint8Array(1+o.byteLength);s[0]=v[t.type];for(var a=0;a<i.length;a++)s[a+1]=i[a];return n(s.buffer)}function i(t,r,n){if(!r)return e.encodeBase64Packet(t,n);var o=new FileReader;return o.onload=function(){t.data=o.result,e.encodePacket(t,r,!0,n)},o.readAsArrayBuffer(t.data)}function s(t,r,n){if(!r)return e.encodeBase64Packet(t,n);if(g)return i(t,r,n);var o=new Uint8Array(1);o[0]=v[t.type];var s=new w([o.buffer,t.data]);return n(s)}function a(t){try{t=d.decode(t)}catch(t){return!1}return t}function c(t,e,r){for(var n=new Array(t.length),o=l(t.length,r),i=function(t,r,o){e(r,function(e,r){n[t]=r,o(e,n)})},s=0;s<t.length;s++)i(s,t[s],o)}var h,p=r(21),u=r(22),f=r(23),l=r(24),d=r(25);
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Uint8Array(r.data),c=new Array(a.length),h=0;h<a.length;h++)c[h]=a[h];s=String.fromCharCode.apply(null,c)}return o+=t.btoa(s),n(o)},e.decodePacket=function(t,r,n){if(void 0===t)return k;if("string"==typeof t){if("b"==t.charAt(0))return e.decodeBase64Packet(t.substr(1),r);if(n&&(t=a(t),t===!1))return k;var o=t.charAt(0);return Number(o)==o&&b[o]?t.length>1?{type:b[o],data:t.substring(1)}:{type:b[o]}:k}var i=new Uint8Array(t),o=i[0],s=f(t,1);return w&&"blob"===r&&(s=new w([s])),{type:b[o],data:s}},e.decodeBase64Packet=function(t,e){var r=b[t.charAt(0)];if(!h)return{type:r,data:{base64:!0,data:t.substr(1)}};var n=h.decode(t.substr(1));return"blob"===e&&w&&(n=new w([n])),{type:r,data:n}},e.encodePayload=function(t,r,n){function o(t){return t.length+":"+t}function i(t,n){e.encodePacket(t,!!s&&r,!0,function(t){n(null,o(t))})}"function"==typeof r&&(n=r,r=null);var s=u(t);return r&&s?w&&!g?e.encodePayloadAsBlob(t,n):e.encodePayloadAsArrayBuffer(t,n):t.length?void c(t,i,function(t,e){return n(e.join(""))}):n("0:")},e.decodePayload=function(t,r,n){if("string"!=typeof t)return e.decodePayloadAsBinary(t,r,n);"function"==typeof r&&(n=r,r=null);var o;if(""==t)return n(k,0,1);for(var i,s,a="",c=0,h=t.length;c<h;c++){var p=t.charAt(c);if(":"!=p)a+=p;else{if(""==a||a!=(i=Number(a)))return n(k,0,1);if(s=t.substr(c+1,i),a!=s.length)return n(k,0,1);if(s.length){if(o=e.decodePacket(s,r,!0),k.type==o.type&&k.data==o.data)return n(k,0,1);var u=n(o,c+i,h);if(!1===u)return}c+=i,a=""}}return""!=a?n(k,0,1):void 0},e.encodePayloadAsArrayBuffer=function(t,r){function n(t,r){e.encodePacket(t,!0,!0,function(t){return r(null,t)})}return t.length?void c(t,n,function(t,e){var n=e.reduce(function(t,e){var r;return r="string"==typeof e?e.length:e.byteLength,t+r.toString().length+r+2},0),o=new Uint8Array(n),i=0;return e.forEach(function(t){var e="string"==typeof t,r=t;if(e){for(var n=new Uint8Array(t.length),s=0;s<t.length;s++)n[s]=t.charCodeAt(s);r=n.buffer}e?o[i++]=0:o[i++]=1;for(var a=r.byteLength.toString(),s=0;s<a.length;s++)o[i++]=parseInt(a[s]);o[i++]=255;for(var n=new Uint8Array(r),s=0;s<n.length;s++)o[i++]=n[s]}),r(o.buffer)}):r(new ArrayBuffer(0))},e.encodePayloadAsBlob=function(t,r){function n(t,r){e.encodePacket(t,!0,!0,function(t){var e=new Uint8Array(1);if(e[0]=1,"string"==typeof t){for(var n=new Uint8Array(t.length),o=0;o<t.length;o++)n[o]=t.charCodeAt(o);t=n.buffer,e[0]=0}for(var i=t instanceof ArrayBuffer?t.byteLength:t.size,s=i.toString(),a=new Uint8Array(s.length+1),o=0;o<s.length;o++)a[o]=parseInt(s[o]);if(a[s.length]=255,w){var c=new w([e.buffer,a.buffer,t]);r(null,c)}})}c(t,n,function(t,e){return r(new w(e))})},e.decodePayloadAsBinary=function(t,r,n){"function"==typeof r&&(n=r,r=null);for(var o=t,i=[],s=!1;o.byteLength>0;){for(var a=new Uint8Array(o),c=0===a[0],h="",p=1;255!=a[p];p++){if(h.length>310){s=!0;break}h+=a[p]}if(s)return n(k,0,1);o=f(o,2+h.length),h=parseInt(h);var u=f(o,0,h);if(c)try{u=String.fromCharCode.apply(null,new 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