/opt/canhelp/node_modules/engine.io-client/build/esm/transports
Edit: /opt/canhelp/node_modules/engine.io-client/build/esm/transports/webtransport.js (2978B)
import { Transport } from "../transport.js";
import { nextTick } from "../globals.node.js";
import { createPacketDecoderStream, createPacketEncoderStream, } from "engine.io-parser";
/**
* WebTransport transport based on the built-in `WebTransport` object.
*
* Usage: browser, Node.js (with the `@fails-components/webtransport` package)
*
* @see https://developer.mozilla.org/en-US/docs/Web/API/WebTransport
* @see https://caniuse.com/webtransport
*/
export class WT extends Transport {
get name() {
return "webtransport";
}
doOpen() {
try {
// @ts-ignore
this._transport = new WebTransport(this.createUri("https"), this.opts.transportOptions[this.name]);
}
catch (err) {
return this.emitReserved("error", err);
}
this._transport.closed
.then(() => {
this.onClose();
})
.catch((err) => {
this.onError("webtransport error", err);
});
// note: we could have used async/await, but that would require some additional polyfills
this._transport.ready.then(() => {
this._transport.createBidirectionalStream().then((stream) => {
const decoderStream = createPacketDecoderStream(Number.MAX_SAFE_INTEGER, this.socket.binaryType);
const reader = stream.readable.pipeThrough(decoderStream).getReader();
const encoderStream = createPacketEncoderStream();
encoderStream.readable.pipeTo(stream.writable);
this._writer = encoderStream.writable.getWriter();
const read = () => {
reader
.read()
.then(({ done, value }) => {
if (done) {
return;
}
this.onPacket(value);
read();
})
.catch((err) => {
});
};
read();
const packet = { type: "open" };
if (this.query.sid) {
packet.data = `{"sid":"${this.query.sid}"}`;
}
this._writer.write(packet).then(() => this.onOpen());
});
});
}
write(packets) {
this.writable = false;
for (let i = 0; i < packets.length; i++) {
const packet = packets[i];
const lastPacket = i === packets.length - 1;
this._writer.write(packet).then(() => {
if (lastPacket) {
nextTick(() => {
this.writable = true;
this.emitReserved("drain");
}, this.setTimeoutFn);
}
});
}
}
doClose() {
var _a;
(_a = this._transport) === null || _a === void 0 ? void 0 : _a.close();
}
}