66 lines
2 KiB
JavaScript
66 lines
2 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.WebTransport = void 0;
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const transport_1 = require("../transport");
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const debug_1 = require("debug");
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const engine_io_parser_1 = require("engine.io-parser");
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const debug = (0, debug_1.default)("engine:webtransport");
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/**
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* Reference: https://developer.mozilla.org/en-US/docs/Web/API/WebTransport_API
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*/
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class WebTransport extends transport_1.Transport {
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constructor(session, stream, reader) {
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super({ _query: { EIO: "4" } });
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this.session = session;
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const transformStream = (0, engine_io_parser_1.createPacketEncoderStream)();
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transformStream.readable.pipeTo(stream.writable).catch(() => {
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debug("the stream was closed");
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});
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this.writer = transformStream.writable.getWriter();
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(async () => {
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try {
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while (true) {
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const { value, done } = await reader.read();
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if (done) {
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debug("session is closed");
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break;
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}
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debug("received chunk: %o", value);
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this.onPacket(value);
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}
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}
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catch (e) {
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debug("error while reading: %s", e.message);
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}
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})();
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session.closed.then(() => this.onClose());
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this.writable = true;
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}
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get name() {
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return "webtransport";
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}
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get supportsFraming() {
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return true;
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}
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async send(packets) {
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this.writable = false;
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try {
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for (let i = 0; i < packets.length; i++) {
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const packet = packets[i];
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await this.writer.write(packet);
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}
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}
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catch (e) {
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debug("error while writing: %s", e.message);
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}
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this.writable = true;
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this.emit("drain");
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}
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doClose(fn) {
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debug("closing WebTransport session");
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this.session.close();
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fn && fn();
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}
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}
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exports.WebTransport = WebTransport;
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