390 lines
15 KiB
TypeScript
390 lines
15 KiB
TypeScript
//start ws server with socket.io
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const SerAny = require('serialize-anything');
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var http = require('http');
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var express = require('express');
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import { Request, Response } from 'express';
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var app = express();
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var server = http.createServer(app);
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var port = process.env.PORT || 8480;
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var fs = require('fs');
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const { Server } = require("socket.io");
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const { abort } = require('process');
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import { Socket } from 'socket.io';
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const io = new Server(server);
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app.get('/', (req:Request, res:Response) => {
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res.sendFile(__dirname + '/index.html');
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});
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//initialize buffer
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//var buffer = [];
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//add type for typescript
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var buffer: { [id: string]: string } = {};
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//var filesystem = [];
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var filesystem: any = {};
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//var curdir = [];
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var curdir: any = {};
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//var sessions = [];
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var sessions: any = {};
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//var curdirx = [];
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var curdirx: any = {};
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//on connection
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function sendbuffer(socket:Socket, bufferx: { [id: string]: string }) {
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var bufx = bufferx[socket.id];
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//add placeholder character(reserved unicode) for blinking cursor in client;
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bufx += "\u2588";
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socket.emit('buffer', bufx);
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}
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io.on('connection', (socket:Socket) => {
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console.log('a user connected');
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buffer[socket.id] = "";
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filesystem[socket.id] = {};
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curdir[socket.id] = filesystem[socket.id];
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curdirx[socket.id] = [];
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//welcome message
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buffer[socket.id] = "Welcome to the console!\n";
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buffer[socket.id] += "Type 'help' to see the available commands.\n";
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buffer[socket.id] += "#";
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//send buffer
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sendbuffer(socket, buffer);
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socket.on('keypress', (data) => {
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console.log('a key was pressed');
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//get key
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//convert data to string
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var key = String.fromCharCode(data);
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//convert key to lowercase
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key = key.toLowerCase();
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console.log(data);
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//check if key is printable character or digit or . or space etc
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//check if key is enter
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if (data == 8){
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//backspace
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//if line is not empty remove last character if it is not the first character
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var lines = buffer[socket.id].split("\n");
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if (lines[lines.length - 1] != "#") {
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lines[lines.length - 1] = lines[lines.length - 1].slice(0, -1);
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buffer[socket.id] = lines.join("\n");
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}
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}
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else if(data == 13) {
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//execute command
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let lines = buffer[socket.id].split('\n');
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let command = lines[lines.length-1];
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//remove # from command
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command = command.substring(1);
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//remove \n and everything after
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command = command.substring(command.indexOf('\n'), command.length);
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let args = command.split(' ');
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let commandName = args[0];
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let commandArgs = args.slice(1);
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//remove trailing spaces
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commandArgs = commandArgs.map(function(arg) {
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return arg.trim();
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});
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//add \n to buffer
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buffer[socket.id] += "\n";
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//remove # in beginning of commandname
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console.log("Executing command: \"" + commandName + "\" with arguments: \"" + commandArgs + "\"");
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resolveCommand(commandName, socket, commandArgs);
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}
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else{
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//add key to buffer
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buffer[socket.id] += key;
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}
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//send buffer to client
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sendbuffer(socket, buffer);
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});
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});
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io.on('disconnect', (socket:Socket) => {
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console.log('user disconnected');
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buffer[socket.id] = "";
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});
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function resolveCommand(commandname:string, socket:Socket, args:string[]) {
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switch (commandname) {
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case "help":
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buffer[socket.id] += "Available commands:\n";
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buffer[socket.id] += "help - shows this help\n";
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buffer[socket.id] += "clear - clears the console\n";
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buffer[socket.id] += "exit - exits the console\n";
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buffer[socket.id] += "ls - lists the files in the current directory\n";
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buffer[socket.id] += "cd - changes the current directory\n";
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buffer[socket.id] += "echo - prints the arguments\n";
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buffer[socket.id] += "mkdir - creates a new directory\n";
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buffer[socket.id] += "cat - prints the contents of a file\n";
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buffer[socket.id] += "touch - creates a new file\n";
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buffer[socket.id] += "rm - removes a file\n";
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buffer[socket.id] += "mv - moves a file\n";
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buffer[socket.id] += "cp - copies a file\n";
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buffer[socket.id] += "rmdir - removes a directory\n";
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//spam
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buffer[socket.id] += "spam - spams the console\n";
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//command to write rest of args to file
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buffer[socket.id] += "write - writes the arguments to a file\n";
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//command to take a screenshot which is saved in the current directory with filename from args
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buffer[socket.id] += "screenshot - takes a screenshot\n";
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break;
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case "savesess":
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if (args.length == 2) {
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if (args[0] == "kryptic") {
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sessions[args[1]] = [];
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sessions[args[1]]["buffer"] = buffer[socket.id].slice();
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sessions[args[1]]["filesystem"] = JSON.parse(JSON.stringify(filesystem[socket.id]));
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sessions[args[1]]["curdir"] = JSON.parse(JSON.stringify(curdir[socket.id]));
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var data = SerAny.serialize(sessions);
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//write all sessions to a single file called sessions.json
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fs.writeFileSync("./sessions.json", data);
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buffer[socket.id] += "Session saved.\n";
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}
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else {
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buffer[socket.id] += "Invalid command.";
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}
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}
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else {
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buffer[socket.id] += "Invalid command.";
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}
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break;
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case "loadsess":
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if (args.length == 1) {
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sessions = SerAny.deserialize(fs.readFileSync("./sessions.json"));
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if(sessions[args[0]] != undefined) {
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filesystem[socket.id] = sessions[args[0]]["filesystem"];
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curdir[socket.id] = sessions[args[0]]["curdir"];
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buffer[socket.id] = sessions[args[0]]["buffer"];
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buffer[socket.id] += "Session loaded.\n";
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}
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}
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else {
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}
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break;
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case "wee":
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buffer[socket.id] += "woo\n";
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break;
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case "woo":
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buffer[socket.id] += "wee\n";
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break;
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//implement more commands
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case "screenshot":
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curdir[socket.id][args[0]] = buffer[socket.id];
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buffer[socket.id] += "Screenshot saved to " + args[0] + "\n";
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break;
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case "rm":
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if (curdir[socket.id][args[0]] != undefined) {
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if (typeof curdir[socket.id][args[0]] == "string") {
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delete curdir[socket.id][args[0]];
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buffer[socket.id] += "File " + args[0] + " removed\n";
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}
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else {
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buffer[socket.id] += "Error: " + args[0] + " is not a file\n";
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}
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}
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else {
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buffer[socket.id] += "Error: " + args[0] + " does not exist\n";
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}
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break;
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case "mv":
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if (curdir[socket.id][args[0]] != undefined) {
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if (typeof curdir[socket.id][args[0]] == "string") {
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curdir[socket.id][args[1]] = curdir[socket.id][args[0]];
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delete curdir[socket.id][args[0]];
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buffer[socket.id] += "File " + args[0] + " moved to " + args[1] + "\n";
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}
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else {
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buffer[socket.id] += "Error: " + args[0] + " is not a file\n";
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}
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}
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else {
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buffer[socket.id] += "Error: " + args[0] + " does not exist\n";
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}
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break;
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case "cp":
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if (curdir[socket.id][args[0]] != undefined) {
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if (typeof curdir[socket.id][args[0]] == "string") {
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curdir[socket.id][args[1]] = curdir[socket.id][args[0]].slice(0);
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buffer[socket.id] += "File " + args[0] + " copied to " + args[1] + "\n";
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}
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else {
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buffer[socket.id] += "Error: " + args[0] + " is not a file\n";
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}
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}
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else {
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buffer[socket.id] += "Error: " + args[0] + " does not exist\n";
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}
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break;
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case "rmdir":
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if (curdir[socket.id][args[0]] != undefined) {
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if (typeof curdir[socket.id][args[0]] == "object") {
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delete curdir[socket.id][args[0]];
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buffer[socket.id] += "Directory " + args[0] + " removed\n";
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}
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else {
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buffer[socket.id] += "Error: " + args[0] + " is not a directory\n";
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}
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}
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else {
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buffer[socket.id] += "Error: " + args[0] + " does not exist\n";
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}
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break;
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case "spam":
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//spam arguments times from first argument
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for (let i = 0; i < parseInt(args[0]); i++) {
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buffer[socket.id] += args.slice(1).join(" ") + "\n";
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}
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break;
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case "touch":
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if (args.length == 0) {
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buffer[socket.id] += "touch: missing operand\n";
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}
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else {
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curdir[socket.id][args[0]] = "";
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}
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break;
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case "write":
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if (args.length == 0) {
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buffer[socket.id] += "write: missing operand\n";
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}
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else {
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curdir[socket.id][args[0]] = "";
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for (let i = 1; i < args.length; i++) {
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curdir[socket.id][args[0]] += args[i] + " ";
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}
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}
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break;
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case "cat":
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if (args.length == 0) {
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buffer[socket.id] += "cat: missing operand\n";
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}
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else {
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let file = args[0];
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if (curdir[socket.id][file] == undefined) {
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buffer[socket.id] += "cat: " + file + ": No such file or directory\n";
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}
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//check if type string
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else if(typeof curdir[socket.id][file] == "string") {
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buffer[socket.id] += curdir[socket.id][file] + "\n";
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}
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else{
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buffer[socket.id] += "cat: " + file + ": Is not a file\n";
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}
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}
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break;
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case "echo":
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buffer[socket.id] += args.join(' ');
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buffer[socket.id] += "\n";
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break;
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case "clear":
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buffer[socket.id] = "";
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break;
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case "exit":
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buffer[socket.id] = "";
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buffer[socket.id] += "Bye!\n";
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socket.disconnect();
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break;
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case "ls":
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buffer[socket.id] += "Files in the current directory:\n";
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//list only first level files
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for (var key in curdir[socket.id]) {
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//buffer[socket.id] += key + "\n";
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//also print if it is a directory or file
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if (typeof curdir[socket.id][key] == "string") {
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buffer[socket.id] += key + " (file)\n";
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}
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else if (typeof curdir[socket.id][key] == "object") {
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buffer[socket.id] += key + " (directory)\n";
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}
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else {
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buffer[socket.id] += key + " (unknown)\n";
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}
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}
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break;
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case "cd":
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if (args.length == 0) {
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buffer[socket.id] += "Please specify a directory.\n";
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}
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else {
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if(args[0] == "..") {
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//go up one directory
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//recursively scan filesystem until we find curdir and then set curdir to its parent
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//check curdirx is not empty
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if (curdirx[socket.id].length > 0) {
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//pop off last element
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var sync = "filesystem[socket.id]";
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for(let i = 0; i < curdirx[socket.id].length; i++) {
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sync += "['" + curdirx[socket.id][i] + "']";
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}
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sync += " = curdir[socket.id];";
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console.log(sync);
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eval(sync);
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curdirx[socket.id].pop();
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//curdir = filesystem[socket.id][(curdirx[socket.id][0])][(curdirx[socket.id][1])].......;
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//i know i shouldnt use eval but I don't know any other way to do this
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var cmdexec = "curdir[socket.id] = filesystem[socket.id]";
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//syncing = write curdir to a path in the filesystem
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for (let i = 0; i < curdirx[socket.id].length; i++) {
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cmdexec += "[(curdirx[socket.id][" + i + "])]";
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}
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eval(cmdexec);
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}
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}
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else {
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if (curdir[socket.id][args[0]] != undefined) {
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//check if type dict
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if (typeof curdir[socket.id][args[0]] == "object") {
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curdir[socket.id] = curdir[socket.id][args[0]];
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buffer[socket.id] += "Changed directory to " + args[0] + "\n";
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curdirx[socket.id].push(args[0]);
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}
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else{
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buffer[socket.id] += "cd: " + args[0] + ": Is not a directory\n";
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}
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}
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else {
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buffer[socket.id] += "Directory " + args[0] + " does not exist.\n";
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}
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}
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}
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break;
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case "pwd":
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var curdirasstring = curdirx[socket.id].join("/");
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buffer[socket.id] += "Current directory: " + curdirasstring + "\n";
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break;
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case "mkdir":
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if (args.length == 0) {
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buffer[socket.id] += "Please specify a directory.\n";
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}
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else {
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if (curdir[socket.id][args[0]]) {
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buffer[socket.id] += "Directory " + args[0] + " already exists.\n";
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}
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else {
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curdir[socket.id][args[0]] = {};
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buffer[socket.id] += "Created directory " + args[0] + "\n";
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}
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}
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break;
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//invalid command
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default:
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buffer[socket.id] += "Invalid command.\n";
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}
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buffer[socket.id] += "#";
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}
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server.listen(port, function() {
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console.log('Server listening at port %d', port);
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}); |