92 lines
2.6 KiB
TypeScript
92 lines
2.6 KiB
TypeScript
/*
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Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
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Copyright (C) 2023 Spacebar and Spacebar Contributors
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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import { Payload, WebSocket } from "@spacebar/gateway";
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import fs from "fs/promises";
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import path from "path";
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import { ErlpackType, JSONReplacer } from "@spacebar/util";
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let erlpack: ErlpackType | null = null;
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try {
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erlpack = require("erlpack") as ErlpackType;
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} catch (e) {
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// empty
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}
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// don't care
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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const recurseJsonReplace = (json: any) => {
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for (const key in json) {
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// eslint-disable-next-line no-prototype-builtins
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if (!json.hasOwnProperty(key)) continue;
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json[key] = JSONReplacer.call(json, key, json[key]);
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if (typeof json[key] == "object" && json[key] !== null)
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json[key] = recurseJsonReplace(json[key]);
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}
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return json;
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};
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export function Send(socket: WebSocket, data: Payload) {
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if (process.env.WS_VERBOSE)
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console.log(`[Websocket] Outgoing message: ${JSON.stringify(data)}`);
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if (process.env.WS_DUMP) {
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const id = socket.session_id || "unknown";
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(async () => {
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await fs.mkdir(path.join("dump", id), {
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recursive: true,
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});
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await fs.writeFile(
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path.join("dump", id, `${Date.now()}.out.json`),
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JSON.stringify(data, null, 2),
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);
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})();
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}
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let buffer: Buffer | string;
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if (socket.encoding === "etf" && erlpack) {
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// Erlpack doesn't like Date objects, encodes them as {}
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data = recurseJsonReplace(data);
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buffer = erlpack.pack(data);
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}
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// TODO: encode circular object
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else if (socket.encoding === "json")
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buffer = JSON.stringify(data, JSONReplacer);
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else return;
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// TODO: compression
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if (socket.deflate) {
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buffer = socket.deflate.process(buffer) as Buffer;
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}
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return new Promise((res, rej) => {
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if (socket.readyState !== 1) {
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// return rej("socket not open");
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socket.close();
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return;
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}
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socket.send(buffer, (err) => {
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if (err) return rej(err);
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return res(null);
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});
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});
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}
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