"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.serveFile = exports.restoreAdapter = exports.patchAdapter = void 0;
const socket_io_adapter_1 = require("socket.io-adapter");
const fs_1 = require("fs");
const debug_1 = __importDefault(require("debug"));
const debug = (0, debug_1.default)("socket.io:adapter-uws");
const SEPARATOR = "\x1f"; // see https://en.wikipedia.org/wiki/Delimiter#ASCII_delimited_text
const { addAll, del, broadcast } = socket_io_adapter_1.Adapter.prototype;
function patchAdapter(app /* : TemplatedApp */) {
socket_io_adapter_1.Adapter.prototype.addAll = function (id, rooms) {
const isNew = !this.sids.has(id);
addAll.call(this, id, rooms);
const socket = this.nsp.sockets.get(id);
if (!socket) {
return;
}
if (socket.conn.transport.name === "websocket") {
subscribe(this.nsp.name, socket, isNew, rooms);
return;
}
if (isNew) {
socket.conn.on("upgrade", () => {
const rooms = this.sids.get(id);
if (rooms) {
subscribe(this.nsp.name, socket, isNew, rooms);
}
});
}
};
socket_io_adapter_1.Adapter.prototype.del = function (id, room) {
del.call(this, id, room);
const socket = this.nsp.sockets.get(id);
if (socket && socket.conn.transport.name === "websocket") {
// @ts-ignore
const sessionId = socket.conn.id;
// @ts-ignore
const websocket = socket.conn.transport.socket;
const topic = `${this.nsp.name}${SEPARATOR}${room}`;
debug("unsubscribe connection %s from topic %s", sessionId, topic);
websocket.unsubscribe(topic);
}
};
socket_io_adapter_1.Adapter.prototype.broadcast = function (packet, opts) {
const useFastPublish = opts.rooms.size <= 1 && opts.except.size === 0;
if (!useFastPublish) {
broadcast.call(this, packet, opts);
return;
}
const flags = opts.flags || {};
const basePacketOpts = {
preEncoded: true,
volatile: flags.volatile,
compress: flags.compress,
};
packet.nsp = this.nsp.name;
const encodedPackets = this.encoder.encode(packet);
const topic = opts.rooms.size === 0
? this.nsp.name
: `${this.nsp.name}${SEPARATOR}${opts.rooms.keys().next().value}`;
debug("fast publish to %s", topic);
// fast publish for clients connected with WebSocket
encodedPackets.forEach((encodedPacket) => {
const isBinary = typeof encodedPacket !== "string";
// "4" being the message type in the Engine.IO protocol, see https://github.com/socketio/engine.io-protocol
app.publish(topic, isBinary ? encodedPacket : "4" + encodedPacket, isBinary);
});
this.apply(opts, (socket) => {
if (socket.conn.transport.name !== "websocket") {
// classic publish for clients connected with HTTP long-polling
socket.client.writeToEngine(encodedPackets, basePacketOpts);
}
});
};
}
exports.patchAdapter = patchAdapter;
function subscribe(namespaceName, socket, isNew, rooms) {
// @ts-ignore
const sessionId = socket.conn.id;
// @ts-ignore
const websocket = socket.conn.transport.socket;
if (isNew) {
debug("subscribe connection %s to topic %s", sessionId, namespaceName);
websocket.subscribe(namespaceName);
}
rooms.forEach((room) => {
const topic = `${namespaceName}${SEPARATOR}${room}`; // '#' can be used as wildcard
debug("subscribe connection %s to topic %s", sessionId, topic);
websocket.subscribe(topic);
});
}
function restoreAdapter() {
socket_io_adapter_1.Adapter.prototype.addAll = addAll;
socket_io_adapter_1.Adapter.prototype.del = del;
socket_io_adapter_1.Adapter.prototype.broadcast = broadcast;
}
exports.restoreAdapter = restoreAdapter;
const toArrayBuffer = (buffer) => {
const { buffer: arrayBuffer, byteOffset, byteLength } = buffer;
return arrayBuffer.slice(byteOffset, byteOffset + byteLength);
};
// imported from https://github.com/kolodziejczak-sz/uwebsocket-serve
function serveFile(res /* : HttpResponse */, filepath) {
const { size } = (0, fs_1.statSync)(filepath);
const readStream = (0, fs_1.createReadStream)(filepath);
const destroyReadStream = () => !readStream.destroyed && readStream.destroy();
const onError = (error) => {
destroyReadStream();
throw error;
};
const onDataChunk = (chunk) => {
const arrayBufferChunk = toArrayBuffer(chunk);
const lastOffset = res.getWriteOffset();
const [ok, done] = res.tryEnd(arrayBufferChunk, size);
if (!done && !ok) {
readStream.pause();
res.onWritable((offset) => {
const [ok, done] = res.tryEnd(arrayBufferChunk.slice(offset - lastOffset), size);
if (!done && ok) {
readStream.resume();
}
return ok;
});
}
};
res.onAborted(destroyReadStream);
readStream
.on("data", onDataChunk)
.on("error", onError)
.on("end", destroyReadStream);
}
exports.serveFile = serveFile;