80 lines
2.3 KiB
JavaScript
80 lines
2.3 KiB
JavaScript
const net = require('net');
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const eol = require('os').EOL;
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const crypto = require('crypto');
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const HASH_ALG = 'sha256';
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const NAME_LEN = 10;
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var srvr = net.createServer();
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var clientList = [];
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srvr.on('connection', function (client) {
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client.name = calcName(client.remoteAddress, client.remotePort);
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client.write('Welcome, ' + client.name + eol);
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clientList.push(client);
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client.on("data", function (data) {
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if (data.at(0) !== "\\".charCodeAt(0)) {
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broadcast(data, client);
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return;
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}
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command = data
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.subarray(1)
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.toString()
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.split(/[\s\r\n]+/)
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.filter((s) => s.length > 0);
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console.log(command);
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switch (command[0]) {
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case "list":
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const list = clientList.map((c) => c.name).join(eol);
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client.write("Connected Users" + eol + list + eol);
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break;
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case "rename":
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if (command.length !== 2) {
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client.write("Usage: \\rename <newname>" + eol);
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break;
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}
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const oldName = client.name;
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client.name = command[1];
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client.write("You are now known as " + client.name + eol);
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broadcast(oldName + " is now known as " + client.name + eol, client);
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break;
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case "private":
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if (command.length < 3) {
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client.write("Usage: \\private <name> <msg>" + eol);
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break;
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}
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const targetName = command[1];
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const msg = command.slice(2).join(" ");
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const targetClient = clientList.find((c) => c.name === targetName);
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if (targetClient) {
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targetClient.write("(Private) " + client.name + " says " + msg + eol);
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client.write("(Private) To " + targetClient.name + ": " + msg + eol);
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} else {
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client.write("User " + targetName + " not found." + eol);
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}
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break;
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default:
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client.write("Unknown command: " + command[0] + eol);
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}
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});
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});
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function calcName(remoteAddress, remotePort) {
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let data = remoteAddress + ":" + remotePort;
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let h = crypto.createHash(HASH_ALG).update(data).digest('hex')
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return h.substring(0, NAME_LEN);
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}
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function broadcast(data, client) {
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for (var i in clientList) {
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if (client !== clientList[i]) {
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clientList[i].write(client.name + " says " + data);
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}
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}
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}
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srvr.listen(9000);
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