81 lines
2.9 KiB
JavaScript
81 lines
2.9 KiB
JavaScript
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();
|
|
}
|
|
}
|