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bitnetwork/server.js

Last active July 8, 2023 21:09
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A telnet server written in Node.js
Raw
server.js
var lib_net = require("net");
var lib_chalk = require("chalk");
var clients = {};
var lastId = -1;
function cleanInput(data) {
return data.toString().replace(/(\r\n|\n|\r)/gm,"");
}
function clipText(text, seperator, delimiter) {
var output = "";
for (var i=0; i<text.length; i+=seperator) {
output += text.substring(i, i + seperator) + delimiter;
}
output = output.substring(0, output.length - delimiter.length);
return output;
}
function redraw(display) {
var output = "";
for (var i=0; i<display.length; i++) {
output += "\r\n" + display[i].join("");
}
return output;
}
function clear(lines) {
return "\r\n".repeat(lines || 40);
}
function socketHandler(socket) {
// Figure out how to stop linemode & echo by default.
lastId++;
clients[lastId] = {socket: socket};
var id = lastId;
var mode = "title";
var display = [];
for (var i=0; i<20; i++) {
display[i] = [];
for (var j=0; j<80; j++) {
display[i][j] = " ";
}
}
/*
╔══════════════════════════════════════════════════════════════════════════════╗
║ ___ _ _ ___ ___ ___ ║
║ | _ |_) |_ | _ ) _ ) __| Server: Bit BBS ║
║ | _ \ | _| | _ \ _ \__ \ Client: XXX.XXX.XXX.XXX ║
║ |___/_|\__| |___/___/___/ Timestamp: hh:mm:ss DD/MM/YYYY ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ Welcome to the Bit BBS server! Do note that your client should be in ║
║ character mode, that is where keystrokes are sent to the server directly. If ║
║ your client is not in this mode, do try `mode character` in your client's ║
║ terminal with the escape character, or if you are using a client with a GUI, ║
║ try looking in the connection configuration. A color enabled terminal is ║
║ also required to use the board. Type / for the command menu at any time. ║
║ ║
║ Press any key to continue... ║
║ ║
╚══════════════════════════════════════════════════════════════════════════════╝
*/
display = [ "╔══════════════════════════════════════════════════════════════════════════════╗".split(""),
"║ ___ _ _ ___ ___ ___ ║".split(""),
"║ | _ |_) |_ | _ ) _ ) __| Server: Bit BBS ║".split(""),
"║ | _ \\ | _| | _ \\ _ \\__ \\ Client: XXX.XXX.XXX.XXX ║".split(""),
"║ |___/_|\\__| |___/___/___/ Timestamp: hh:mm:ss DD/MM/YYYY ║".split(""),
"║ ║".split(""),
"║ ║".split(""),
"║ ║".split(""),
"║ ║".split(""),
"║ ║".split(""),
"║ Welcome to the Bit BBS server! Do note that your client should be in ║".split(""),
"║ character mode, that is where keystrokes are sent to the server directly. If ║".split(""),
"║ your client is not in this mode, do try `mode character` in your client's ║".split(""),
"║ terminal with the escape character, or if you are using a client with a GUI, ║".split(""),
"║ try looking in the connection configuration. A color enabled terminal is ║".split(""),
"║ also required to use the board. Type / for the command menu at any time. ║".split(""),
"║ ║".split(""),
"║ Press any key to continue... ║".split(""),
"║ ║".split(""),
"╚══════════════════════════════════════════════════════════════════════════════╝".split("")
];
var now = new Date();
var formatedNow = (now.getHours()).toString().length === 1 ? "0" + (now.getHours()) : (now.getHours()).toString();
formatedNow += ":" + ((now.getMinutes()).toString().length === 1 ? "0" + (now.getMinutes()) : (now.getMinutes()).toString());
formatedNow += ":" + ((now.getSeconds()).toString().length === 1 ? "0" + (now.getSeconds()) : (now.getSeconds()).toString());
formatedNow += " " + ((now.getDate()).toString().length === 1 ? "0" + (now.getDate()) : (now.getDate()).toString());
formatedNow += "/" + ((now.getMonth() + 1).toString().length === 1 ? "0" + (now.getMonth() + 1) : (now.getMonth() + 1).toString());
formatedNow += "/" + (now.getFullYear());
// Client address
for (var i=0; i<15; i++) {
display[3][54 + i] = socket.remoteAddress.toString()[i] || " ";
}
// Timestamp
for (var i=0; i<19; i++) {
display[4][57 + i] = formatedNow[i] || " ";
}
socket.write(clear());
socket.write(redraw(display));
mode = "title_continue";
var typing = "";
function switchMode(mode) {
switch (mode) {
case "slash":
/*
╔══════════════════════════════════════════════════════════════════════════════╗
║ Bit BBS // Guest // XXX.XXX.XXX.XXX // hh:mm:ss DD/MM/YYYY ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ Slash > / ║
╚══════════════════════════════════════════════════════════════════════════════╝
*/
display[18] = "║ Slash > / ║".split("");
// Color
for (var i=0; i<78; i++) {
display[18][i + 1] = lib_chalk.bgRed(display[18][i + 1]);
}
socket.write(clear());
socket.write(redraw(display));
break;
case "main":
/*
╔══════════════════════════════════════════════════════════════════════════════╗
║ Bit BBS // Guest // XXX.XXX.XXX.XXX // hh:mm:ss DD/MM/YYYY ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
║ ║
╚══════════════════════════════════════════════════════════════════════════════╝
*/
display = [ "╔══════════════════════════════════════════════════════════════════════════════╗".split(""),
"║ Bit BBS // Guest // XXX.XXX.XXX.XXX // hh:mm:ss DD/MM/YYYY ║".split(""),
"║ ║".split(""),
"║ ║".split(""),
"║ ║".split(""),
"║ ║".split(""),
"║ ║".split(""),
"║ ║".split(""),
"║ ║".split(""),
"║ ║".split(""),
"║ ║".split(""),
"║ ║".split(""),
"║ ║".split(""),
"║ ║".split(""),
"║ ║".split(""),
"║ ║".split(""),
"║ ║".split(""),
"║ ║".split(""),
"║ ║".split(""),
"╚══════════════════════════════════════════════════════════════════════════════╝".split("")
];
var now = new Date();
var formatedNow = (now.getHours()).toString().length === 1 ? "0" + (now.getHours()) : (now.getHours()).toString();
formatedNow += ":" + ((now.getMinutes()).toString().length === 1 ? "0" + (now.getMinutes()) : (now.getMinutes()).toString());
formatedNow += ":" + ((now.getSeconds()).toString().length === 1 ? "0" + (now.getSeconds()) : (now.getSeconds()).toString());
formatedNow += " " + ((now.getDate()).toString().length === 1 ? "0" + (now.getDate()) : (now.getDate()).toString());
formatedNow += "/" + ((now.getMonth() + 1).toString().length === 1 ? "0" + (now.getMonth() + 1) : (now.getMonth() + 1).toString());
formatedNow += "/" + (now.getFullYear());
// Client address
for (var i=0; i<15; i++) {
display[1][37 + i] = socket.remoteAddress.toString()[i] || " ";
}
// Timestamp
for (var i=0; i<19; i++) {
display[1][58 + i] = formatedNow[i] || " ";
}
// Color
for (var i=0; i<78; i++) {
display[1][i + 1] = lib_chalk.bgGreen(display[1][i + 1]);
}
socket.write(clear());
socket.write(redraw(display));
break;
}
}
socket.on("data", function(data) {
var char = new Buffer(data).toString("base64");
console.log( data + " || " + (new Buffer(data).toString().charCodeAt(0)) + " (" + data.length + ") @ " + mode + " ==> " + char );
if (char === "//0D//0B") {
return;
}
if (char === "Lw==" && (mode !== "title" && mode !== "title_continue" && mode !== "slash")) {
mode = "slash";
switchMode("slash");
return;
}
switch (mode) {
case "slash":
if (char === "Gw==" || char === "Lw==") {
mode = "main";
switchMode("main");
break;
}
break;
case "title_continue":
mode = "main";
switchMode("main");
break;
case "main":
switchMode("main");
break;
}
});
socket.on("end", function() {
clients[id].socket.end();
delete clients[id];
});
}
var server = lib_net.createServer(socketHandler);
server.listen(8023);
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