120 lines
3.5 KiB
TypeScript
120 lines
3.5 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 * as Sentry from "@sentry/node";
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import { CLOSECODES, OPCODES, Payload, WebSocket } from "@spacebar/gateway";
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import { ErlpackType, PayloadSchema } from "@spacebar/util";
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import fs from "fs/promises";
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import BigIntJson from "json-bigint";
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import path from "path";
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import WS from "ws";
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import OPCodeHandlers from "../opcodes";
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import { check } from "../opcodes/instanceOf";
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const bigIntJson = BigIntJson({ storeAsString: true });
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let erlpack: ErlpackType | null = null;
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try {
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erlpack = require("@yukikaze-bot/erlpack") as ErlpackType;
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} catch (e) {
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console.log("Failed to import @yukikaze-bot/erlpack: ", e);
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}
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export async function Message(this: WebSocket, buffer: WS.Data) {
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// TODO: compression
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let data: Payload;
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if (
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(buffer instanceof Buffer && buffer[0] === 123) || // ASCII 123 = `{`. Bad check for JSON
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typeof buffer === "string"
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) {
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data = bigIntJson.parse(buffer.toString());
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} else if (this.encoding === "json" && buffer instanceof Buffer) {
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if (this.inflate) {
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try {
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buffer = this.inflate.process(buffer);
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} catch {
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buffer = buffer.toString();
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}
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}
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data = bigIntJson.parse(buffer as string);
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} else if (this.encoding === "etf" && buffer instanceof Buffer && erlpack) {
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try {
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data = erlpack.unpack(buffer);
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} catch {
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return this.close(CLOSECODES.Decode_error);
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}
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} else return this.close(CLOSECODES.Decode_error);
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if (process.env.WS_VERBOSE)
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console.log(`[Websocket] Incomming message: ${JSON.stringify(data)}`);
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if (process.env.WS_DUMP) {
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const id = this.session_id || "unknown";
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await fs.mkdir(path.join("dump", id), { recursive: true });
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await fs.writeFile(
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path.join("dump", id, `${Date.now()}.in.json`),
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JSON.stringify(data, null, 2),
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);
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if (!this.session_id)
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console.log(
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"[Gateway] Unknown session id, dumping to unknown folder",
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);
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}
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check.call(this, PayloadSchema, data);
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const OPCodeHandler = OPCodeHandlers[data.op];
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if (!OPCodeHandler) {
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console.error("[Gateway] Unkown opcode " + data.op);
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// TODO: if all opcodes are implemented comment this out:
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// this.close(CLOSECODES.Unknown_opcode);
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return;
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}
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try {
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return await Sentry.startSpan(
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// Emma [it/its]@Rory&: is this the right function to migrate to in v8?
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{
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op: "websocket.server",
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name: `GATEWAY ${OPCODES[data.op]}`,
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attributes: {
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// this needs to be reworked :)
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...data.d,
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token: data?.d?.token ? "[Redacted]" : undefined,
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},
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},
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async () => {
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const ret = await OPCodeHandler.call(this, data);
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Sentry.setUser({ id: this.user_id });
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return ret;
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},
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);
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} catch (error) {
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Sentry.captureException(error, {
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user: {
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id: this.user_id,
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},
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});
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console.error(`Error: Op ${data.op}`, error);
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// if (!this.CLOSED && this.CLOSING)
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return this.close(CLOSECODES.Unknown_error);
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}
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}
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