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engine.io.esm.min.js

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  1. /*!
    2. 

  2.  * Engine.IO v6.2.2
    3. 

  3.  * (c) 2014-2022 Guillermo Rauch
    4. 

  4.  * Released under the MIT License.
    5. 

  5.  */
    6. 

  6. const t=Object.create(null);t.open="0",t.close="1",t.ping="2",t.pong="3",t.message="4",t.upgrade="5",t.noop="6";const e=Object.create(null);Object.keys(t).forEach((s=>{e[t[s]]=s}));const s={type:"error",data:"parser error"},r="function"==typeof Blob||"undefined"!=typeof Blob&&"[object BlobConstructor]"===Object.prototype.toString.call(Blob),o="function"==typeof ArrayBuffer,i=({type:e,data:s},i,a)=>{return r&&s instanceof Blob?i?a(s):n(s,a):o&&(s instanceof ArrayBuffer||(h=s,"function"==typeof ArrayBuffer.isView?ArrayBuffer.isView(h):h&&h.buffer instanceof ArrayBuffer))?i?a(s):n(new Blob([s]),a):a(t[e]+(s||""));var h},n=(t,e)=>{const s=new FileReader;return s.onload=function(){const t=s.result.split(",")[1];e("b"+t)},s.readAsDataURL(t)};for(var a="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",h="undefined"==typeof Uint8Array?[]:new Uint8Array(256),p=0;p<a.length;p++)h[a.charCodeAt(p)]=p;const c="function"==typeof ArrayBuffer,l=(t,r)=>{if("string"!=typeof t)return{type:"message",data:d(t,r)};const o=t.charAt(0);if("b"===o)return{type:"message",data:u(t.substring(1),r)};return e[o]?t.length>1?{type:e[o],data:t.substring(1)}:{type:e[o]}:s},u=(t,e)=>{if(c){const s=function(t){var e,s,r,o,i,n=.75*t.length,a=t.length,p=0;"="===t[t.length-1]&&(n--,"="===t[t.length-2]&&n--);var c=new ArrayBuffer(n),l=new Uint8Array(c);for(e=0;e<a;e+=4)s=h[t.charCodeAt(e)],r=h[t.charCodeAt(e+1)],o=h[t.charCodeAt(e+2)],i=h[t.charCodeAt(e+3)],l[p++]=s<<2|r>>4,l[p++]=(15&r)<<4|o>>2,l[p++]=(3&o)<<6|63&i;return c}(t);return d(s,e)}return{base64:!0,data:t}},d=(t,e)=>"blob"===e&&t instanceof ArrayBuffer?new Blob([t]):t,f=String.fromCharCode(30);function y(t){if(t)return function(t){for(var e in y.prototype)t[e]=y.prototype[e];return t}(t)}y.prototype.on=y.prototype.addEventListener=function(t,e){return this._callbacks=this._callbacks||{},(this._callbacks["$"+t]=this._callbacks["$"+t]||[]).push(e),this},y.prototype.once=function(t,e){function s(){this.off(t,s),e.apply(this,arguments)}return s.fn=e,this.on(t,s),this},y.prototype.off=y.prototype.removeListener=y.prototype.removeAllListeners=y.prototype.removeEventListener=function(t,e){if(this._callbacks=this._callbacks||{},0==arguments.length)return this._callbacks={},this;var s,r=this._callbacks["$"+t];if(!r)return this;if(1==arguments.length)return delete this._callbacks["$"+t],this;for(var o=0;o<r.length;o++)if((s=r[o])===e||s.fn===e){r.splice(o,1);break}return 0===r.length&&delete this._callbacks["$"+t],this},y.prototype.emit=function(t){this._callbacks=this._callbacks||{};for(var e=new Array(arguments.length-1),s=this._callbacks["$"+t],r=1;r<arguments.length;r++)e[r-1]=arguments[r];if(s){r=0;for(var o=(s=s.slice(0)).length;r<o;++r)s[r].apply(this,e)}return this},y.prototype.emitReserved=y.prototype.emit,y.prototype.listeners=function(t){return 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r}(0,i.path),i.queryKey=function(t,e){const s={};return e.replace(/(?:^|&)([^&=]*)=?([^&]*)/g,(function(t,e,r){e&&(s[e]=r)})),s}(0,i.query),i}class $ extends y{constructor(t,e={}){super(),t&&"object"==typeof t&&(e=t,t=null),t?(t=X(t),e.hostname=t.host,e.secure="https"===t.protocol||"wss"===t.protocol,e.port=t.port,t.query&&(e.query=t.query)):e.host&&(e.hostname=X(e.host).host),w(this,e),this.secure=null!=e.secure?e.secure:"undefined"!=typeof location&&"https:"===location.protocol,e.hostname&&!e.port&&(e.port=this.secure?"443":"80"),this.hostname=e.hostname||("undefined"!=typeof location?location.hostname:"localhost"),this.port=e.port||("undefined"!=typeof location&&location.port?location.port:this.secure?"443":"80"),this.transports=e.transports||["polling","websocket"],this.readyState="",this.writeBuffer=[],this.prevBufferLen=0,this.opts=Object.assign({path:"/engine.io",agent:!1,withCredentials:!1,upgrade:!0,timestampParam:"t",rememberUpgrade:!1,rejectUnauthorized:!0,perMessageDeflate:{threshold:1024},transportOptions:{},closeOnBeforeunload:!0},e),this.opts.path=this.opts.path.replace(/\/$/,"")+"/","string"==typeof this.opts.query&&(this.opts.query=function(t){let e={},s=t.split("&");for(let t=0,r=s.length;t<r;t++){let r=s[t].split("=");e[decodeURIComponent(r[0])]=decodeURIComponent(r[1])}return e}(this.opts.query)),this.id=null,this.upgrades=null,this.pingInterval=null,this.pingTimeout=null,this.pingTimeoutTimer=null,"function"==typeof addEventListener&&(this.opts.closeOnBeforeunload&&addEventListener("beforeunload",(()=>{this.transport&&(this.transport.removeAllListeners(),this.transport.close())}),!1),"localhost"!==this.hostname&&(this.offlineEventListener=()=>{this.onClose("transport close",{description:"network connection lost"})},addEventListener("offline",this.offlineEventListener,!1))),this.open()}createTransport(t){const e=Object.assign({},this.opts.query);e.EIO=4,e.transport=t,this.id&&(e.sid=this.id);const s=Object.assign({},this.opts.transportOptions[t],this.opts,{query:e,socket:this,hostname:this.hostname,secure:this.secure,port:this.port});return new M[t](s)}open(){let t;if(this.opts.rememberUpgrade&&$.priorWebsocketSuccess&&-1!==this.transports.indexOf("websocket"))t="websocket";else{if(0===this.transports.length)return void this.setTimeoutFn((()=>{this.emitReserved("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)}setTransport(t){this.transport&&this.transport.removeAllListeners(),this.transport=t,t.on("drain",this.onDrain.bind(this)).on("packet",this.onPacket.bind(this)).on("error",this.onError.bind(this)).on("close",(t=>this.onClose("transport close",t)))}probe(t){let e=this.createTransport(t),s=!1;$.priorWebsocketSuccess=!1;const r=()=>{s||(e.send([{type:"ping",data:"probe"}]),e.once("packet",(t=>{if(!s)if("pong"===t.type&&"probe"===t.data){if(this.upgrading=!0,this.emitReserved("upgrading",e),!e)return;$.priorWebsocketSuccess="websocket"===e.name,this.transport.pause((()=>{s||"closed"!==this.readyState&&(p(),this.setTransport(e),e.send([{type:"upgrade"}]),this.emitReserved("upgrade",e),e=null,this.upgrading=!1,this.flush())}))}else{const t=new Error("probe error");t.transport=e.name,this.emitReserved("upgradeError",t)}})))};function o(){s||(s=!0,p(),e.close(),e=null)}const i=t=>{const s=new Error("probe error: "+t);s.transport=e.name,o(),this.emitReserved("upgradeError",s)};function n(){i("transport closed")}function a(){i("socket closed")}function h(t){e&&t.name!==e.name&&o()}const p=()=>{e.removeListener("open",r),e.removeListener("error",i),e.removeListener("close",n),this.off("close",a),this.off("upgrading",h)};e.once("open",r),e.once("error",i),e.once("close",n),this.once("close",a),this.once("upgrading",h),e.open()}onOpen(){if(this.readyState="open",$.priorWebsocketSuccess="websocket"===this.transport.name,this.emitReserved("open"),this.flush(),"open"===this.readyState&&this.opts.upgrade&&this.transport.pause){let t=0;const e=this.upgrades.length;for(;t<e;t++)this.probe(this.upgrades[t])}}onPacket(t){if("opening"===this.readyState||"open"===this.readyState||"closing"===this.readyState)switch(this.emitReserved("packet",t),this.emitReserved("heartbeat"),t.type){case"open":this.onHandshake(JSON.parse(t.data));break;case"ping":this.resetPingTimeout(),this.sendPacket("pong"),this.emitReserved("ping"),this.emitReserved("pong");break;case"error":const e=new Error("server error");e.code=t.data,this.onError(e);break;case"message":this.emitReserved("data",t.data),this.emitReserved("message",t.data)}}onHandshake(t){this.emitReserved("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.maxPayload=t.maxPayload,this.onOpen(),"closed"!==this.readyState&&this.resetPingTimeout()}resetPingTimeout(){this.clearTimeoutFn(this.pingTimeoutTimer),this.pingTimeoutTimer=this.setTimeoutFn((()=>{this.onClose("ping timeout")}),this.pingInterval+this.pingTimeout),this.opts.autoUnref&&this.pingTimeoutTimer.unref()}onDrain(){this.writeBuffer.splice(0,this.prevBufferLen),this.prevBufferLen=0,0===this.writeBuffer.length?this.emitReserved("drain"):this.flush()}flush(){if("closed"!==this.readyState&&this.transport.writable&&!this.upgrading&&this.writeBuffer.length){const t=this.getWritablePackets();this.transport.send(t),this.prevBufferLen=t.length,this.emitReserved("flush")}}getWritablePackets(){if(!(this.maxPayload&&"polling"===this.transport.name&&this.writeBuffer.length>1))return this.writeBuffer;let t=1;for(let s=0;s<this.writeBuffer.length;s++){const r=this.writeBuffer[s].data;if(r&&(t+="string"==typeof(e=r)?function(t){let e=0,s=0;for(let r=0,o=t.length;r<o;r++)e=t.charCodeAt(r),e<128?s+=1:e<2048?s+=2:e<55296||e>=57344?s+=3:(r++,s+=4);return s}(e):Math.ceil(1.33*(e.byteLength||e.size))),s>0&&t>this.maxPayload)return this.writeBuffer.slice(0,s);t+=2}var e;return this.writeBuffer}write(t,e,s){return this.sendPacket("message",t,e,s),this}send(t,e,s){return this.sendPacket("message",t,e,s),this}sendPacket(t,e,s,r){if("function"==typeof e&&(r=e,e=void 0),"function"==typeof s&&(r=s,s=null),"closing"===this.readyState||"closed"===this.readyState)return;(s=s||{}).compress=!1!==s.compress;const o={type:t,data:e,options:s};this.emitReserved("packetCreate",o),this.writeBuffer.push(o),r&&this.once("flush",r),this.flush()}close(){const t=()=>{this.onClose("forced close"),this.transport.close()},e=()=>{this.off("upgrade",e),this.off("upgradeError",e),t()},s=()=>{this.once("upgrade",e),this.once("upgradeError",e)};return"opening"!==this.readyState&&"open"!==this.readyState||(this.readyState="closing",this.writeBuffer.length?this.once("drain",(()=>{this.upgrading?s():t()})):this.upgrading?s():t()),this}onError(t){$.priorWebsocketSuccess=!1,this.emitReserved("error",t),this.onClose("transport error",t)}onClose(t,e){"opening"!==this.readyState&&"open"!==this.readyState&&"closing"!==this.readyState||(this.clearTimeoutFn(this.pingTimeoutTimer),this.transport.removeAllListeners("close"),this.transport.close(),this.transport.removeAllListeners(),"function"==typeof removeEventListener&&removeEventListener("offline",this.offlineEventListener,!1),this.readyState="closed",this.id=null,this.emitReserved("close",t,e),this.writeBuffer=[],this.prevBufferLen=0)}filterUpgrades(t){const e=[];let s=0;const r=t.length;for(;s<r;s++)~this.transports.indexOf(t[s])&&e.push(t[s]);return e}}$.protocol=4;const z=$.protocol;export{$ as Socket,x as Transport,w as installTimerFunctions,X as parse,z as protocol,M as transports};
    7. 

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