95 lines
3.6 KiB
JavaScript
95 lines
3.6 KiB
JavaScript
"use strict";
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var __importDefault = (this && this.__importDefault) || function (mod) {
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return (mod && mod.__esModule) ? mod : { "default": mod };
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.WT = void 0;
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const transport_js_1 = require("../transport.js");
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const globals_node_js_1 = require("../globals.node.js");
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const engine_io_parser_1 = require("engine.io-parser");
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const debug_1 = __importDefault(require("debug")); // debug()
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const debug = (0, debug_1.default)("engine.io-client:webtransport"); // debug()
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/**
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* WebTransport transport based on the built-in `WebTransport` object.
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*
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* Usage: browser, Node.js (with the `@fails-components/webtransport` package)
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*
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* @see https://developer.mozilla.org/en-US/docs/Web/API/WebTransport
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* @see https://caniuse.com/webtransport
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*/
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class WT extends transport_js_1.Transport {
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get name() {
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return "webtransport";
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}
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doOpen() {
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try {
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// @ts-ignore
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this._transport = new WebTransport(this.createUri("https"), this.opts.transportOptions[this.name]);
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}
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catch (err) {
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return this.emitReserved("error", err);
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}
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this._transport.closed
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.then(() => {
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debug("transport closed gracefully");
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this.onClose();
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})
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.catch((err) => {
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debug("transport closed due to %s", err);
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this.onError("webtransport error", err);
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});
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// note: we could have used async/await, but that would require some additional polyfills
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this._transport.ready.then(() => {
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this._transport.createBidirectionalStream().then((stream) => {
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const decoderStream = (0, engine_io_parser_1.createPacketDecoderStream)(Number.MAX_SAFE_INTEGER, this.socket.binaryType);
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const reader = stream.readable.pipeThrough(decoderStream).getReader();
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const encoderStream = (0, engine_io_parser_1.createPacketEncoderStream)();
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encoderStream.readable.pipeTo(stream.writable);
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this._writer = encoderStream.writable.getWriter();
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const read = () => {
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reader
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.read()
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.then(({ done, value }) => {
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if (done) {
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debug("session is closed");
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return;
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}
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debug("received chunk: %o", value);
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this.onPacket(value);
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read();
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})
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.catch((err) => {
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debug("an error occurred while reading: %s", err);
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});
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};
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read();
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const packet = { type: "open" };
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if (this.query.sid) {
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packet.data = `{"sid":"${this.query.sid}"}`;
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}
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this._writer.write(packet).then(() => this.onOpen());
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});
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});
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}
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write(packets) {
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this.writable = false;
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for (let i = 0; i < packets.length; i++) {
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const packet = packets[i];
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const lastPacket = i === packets.length - 1;
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this._writer.write(packet).then(() => {
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if (lastPacket) {
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(0, globals_node_js_1.nextTick)(() => {
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this.writable = true;
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this.emitReserved("drain");
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}, this.setTimeoutFn);
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}
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});
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}
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}
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doClose() {
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var _a;
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(_a = this._transport) === null || _a === void 0 ? void 0 : _a.close();
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}
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}
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exports.WT = WT;
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