@eagleoutice/flowr-dev/cli/repl/server/net.js

Static Dataflow Analyzer and Program Slicer for the R Programming Language

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.NetServer = exports.WebSocketWrapper = exports.WebSocketServerWrapper = void 0;
/**
 * This is just a simple layer to allow me to mock the server's behavior in tests.
 */
const net_1 = __importDefault(require("net"));
const ws_1 = require("ws");
const server_1 = require("./server");
class WebSocketServerWrapper {
    server;
    connectHandler;
    onConnect(handler) {
        this.connectHandler = handler;
    }
    start(port) {
        this.server = new ws_1.WebSocketServer({ port, maxPayload: 1024 * 1024 * 1024 * 1024 });
        this.server.on('error', (e) => reportListenFailure(port, e));
        server_1.serverLog.info('WebSocket-Server wrapper is active!');
        this.server.on('connection', c => this.connectHandler?.(new WebSocketWrapper(c)));
    }
}
exports.WebSocketServerWrapper = WebSocketServerWrapper;
class WebSocketWrapper {
    socket;
    remoteAddress;
    remotePort;
    constructor(socket) {
        this.socket = socket;
        this.remoteAddress = socket.url;
    }
    write(data) {
        this.socket.send(data);
    }
    end() {
        this.socket.close();
    }
    on(event, listener) {
        if (event === 'data') {
            this.socket.on('message', listener);
        }
        else {
            this.socket.on(event, listener);
        }
    }
}
exports.WebSocketWrapper = WebSocketWrapper;
class NetServer {
    server;
    constructor() {
        this.server = net_1.default.createServer();
    }
    onConnect(handler) {
        this.server.on('connection', handler);
    }
    start(port) {
        this.server.on('error', (e) => reportListenFailure(port, e));
        this.server.listen(port);
    }
}
exports.NetServer = NetServer;
/** Log a clear, actionable message for a server that failed to bind its port, then exit (there is nothing left to serve). */
function reportListenFailure(port, e) {
    if (e.code === 'EADDRINUSE') {
        server_1.serverLog.error(`Port ${port} is already in use. Pick another port with --port <number> or stop the process using it.`);
    }
    else if (e.code === 'EACCES') {
        server_1.serverLog.error(`Not allowed to listen on port ${port} (permission denied). Try a port above 1024 with --port <number>.`);
    }
    else {
        server_1.serverLog.error(`Failed to start the server on port ${port}: ${e.message}`);
    }
    process.exit(1);
}
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