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Filename : engine.io.esm.min.js
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/*!
 * Engine.IO v6.6.4
 * (c) 2014-2025 Guillermo Rauch
 * Released under the MIT License.
 */
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i=this.writeBuffer[e].data;if(i&&(t+="string"==typeof(s=i)?function(t){let s=0,e=0;for(let i=0,n=t.length;i<n;i++)s=t.charCodeAt(i),s<128?e+=1:s<2048?e+=2:s<55296||s>=57344?e+=3:(i++,e+=4);return e}(s):Math.ceil(1.33*(s.byteLength||s.size))),e>0&&t>this.S)return this.writeBuffer.slice(0,e);t+=2}var s;return this.writeBuffer}Y(){if(!this.R)return!0;const t=Date.now()>this.R;return t&&(this.R=0,x((()=>{this.I("ping timeout")}),this.setTimeoutFn)),t}write(t,s,e){return this.F("message",t,s,e),this}send(t,s,e){return this.F("message",t,s,e),this}F(t,s,e,i){if("function"==typeof s&&(i=s,s=void 0),"function"==typeof e&&(i=e,e=null),"closing"===this.readyState||"closed"===this.readyState)return;(e=e||{}).compress=!1!==e.compress;const n={type:t,data:s,options:e};this.emitReserved("packetCreate",n),this.writeBuffer.push(n),i&&this.once("flush",i),this.flush()}close(){const t=()=>{this.I("forced close"),this.transport.close()},s=()=>{this.off("upgrade",s),this.off("upgradeError",s),t()},e=()=>{this.once("upgrade",s),this.once("upgradeError",s)};return"opening"!==this.readyState&&"open"!==this.readyState||(this.readyState="closing",this.writeBuffer.length?this.once("drain",(()=>{this.upgrading?e():t()})):this.upgrading?e():t()),this}O(t){if(Y.priorWebsocketSuccess=!1,this.opts.tryAllTransports&&this.transports.length>1&&"opening"===this.readyState)return this.transports.shift(),this.N();this.emitReserved("error",t),this.I("transport error",t)}I(t,s){if("opening"===this.readyState||"open"===this.readyState||"closing"===this.readyState){if(this.clearTimeoutFn(this.J),this.transport.removeAllListeners("close"),this.transport.close(),this.transport.removeAllListeners(),K&&(this.$&&removeEventListener("beforeunload",this.$,!1),this.q)){const t=Q.indexOf(this.q);-1!==t&&Q.splice(t,1)}this.readyState="closed",this.id=null,this.emitReserved("close",t,s),this.writeBuffer=[],this.D=0}}}Y.protocol=4;class Z extends Y{constructor(){super(...arguments),this.Z=[]}onOpen(){if(super.onOpen(),"open"===this.readyState&&this.opts.upgrade)for(let t=0;t<this.Z.length;t++)this.tt(this.Z[t])}tt(t){let s=this.createTransport(t),e=!1;Y.priorWebsocketSuccess=!1;const i=()=>{e||(s.send([{type:"ping",data:"probe"}]),s.once("packet",(t=>{if(!e)if("pong"===t.type&&"probe"===t.data){if(this.upgrading=!0,this.emitReserved("upgrading",s),!s)return;Y.priorWebsocketSuccess="websocket"===s.name,this.transport.pause((()=>{e||"closed"!==this.readyState&&(a(),this.setTransport(s),s.send([{type:"upgrade"}]),this.emitReserved("upgrade",s),s=null,this.upgrading=!1,this.flush())}))}else{const t=new Error("probe error");t.transport=s.name,this.emitReserved("upgradeError",t)}})))};function n(){e||(e=!0,a(),s.close(),s=null)}const r=t=>{const e=new Error("probe error: "+t);e.transport=s.name,n(),this.emitReserved("upgradeError",e)};function o(){r("transport closed")}function h(){r("socket closed")}function c(t){s&&t.name!==s.name&&n()}const a=()=>{s.removeListener("open",i),s.removeListener("error",r),s.removeListener("close",o),this.off("close",h),this.off("upgrading",c)};s.once("open",i),s.once("error",r),s.once("close",o),this.once("close",h),this.once("upgrading",c),-1!==this.Z.indexOf("webtransport")&&"webtransport"!==t?this.setTimeoutFn((()=>{e||s.open()}),200):s.open()}onHandshake(t){this.Z=this.st(t.upgrades),super.onHandshake(t)}st(t){const s=[];for(let e=0;e<t.length;e++)~this.transports.indexOf(t[e])&&s.push(t[e]);return s}}class tt extends Z{constructor(t,s={}){const e="object"==typeof t?t:s;(!e.transports||e.transports&&"string"==typeof e.transports[0])&&(e.transports=(e.transports||["polling","websocket","webtransport"]).map((t=>F[t])).filter((t=>!!t))),super(t,e)}}class st extends P{doPoll(){this.et().then((t=>{if(!t.ok)return this.onError("fetch read error",t.status,t);t.text().then((t=>this.onData(t)))})).catch((t=>{this.onError("fetch read error",t)}))}doWrite(t,s){this.et(t).then((t=>{if(!t.ok)return this.onError("fetch write error",t.status,t);s()})).catch((t=>{this.onError("fetch write error",t)}))}et(t){var s;const e=void 0!==t,i=new Headers(this.opts.extraHeaders);return e&&i.set("content-type","text/plain;charset=UTF-8"),null===(s=this.socket.W)||void 0===s||s.appendCookies(i),fetch(this.uri(),{method:e?"POST":"GET",body:e?t:null,headers:i,credentials:this.opts.withCredentials?"include":"omit"}).then((t=>{var s;return null===(s=this.socket.W)||void 0===s||s.parseCookies(t.headers.getSetCookie()),t}))}}const et=tt.protocol;export{st as Fetch,X as NodeWebSocket,$ as NodeXHR,tt as Socket,Z as SocketWithUpgrade,Y as SocketWithoutUpgrade,C as Transport,_ as TransportError,X as WebSocket,V as WebTransport,$ as XHR,O as installTimerFunctions,x as nextTick,J as parse,et as protocol,F as transports};
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