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annotate rlgwebd.js @ 40:f7116eb3f791

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rlgwebd.js: refactor some game-starting code. Separate things like checking for games in progress, starting a new game, and figuring out where the lockfile and ttyrec should go. This allows e.g. the games-in-progress check to be used to create status messages. It also keeps the argument list for the TermSession constructor to a sensible size.
author John "Elwin" Edwards <elwin@sdf.org>
date Fri, 08 Jun 2012 18:11:47 -0700
parents e8ac0e3d2614
children 8f6bc0df58fa
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1 #!/usr/bin/env node
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2
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3 // If you can't quite trust node to find it on its own
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4 var localModules = '/usr/local/lib/node_modules/';
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5 var http = require('http');
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6 var net = require('net');
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7 var url = require('url');
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8 var path = require('path');
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9 var fs = require('fs');
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10 var child_process = require('child_process');
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11 var daemon = require(path.join(localModules, "daemon"));
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13 /* Configuration variables */
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14 // These first two files are NOT in the chroot.
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15 var ctlsocket = "/var/local/rlgwebd/ctl";
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16 var logfile = "/var/local/rlgwebd/log";
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17 var httpPort = 8080;
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18 var chrootDir = "/var/dgl/";
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19 var dropToUID = 501;
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20 var dropToGID = 501;
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21 var serveStaticRoot = "/var/www/"; // inside the chroot
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22 var playtimeout = 3600000; // Idle time before games are autosaved, in ms
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24 /* Data on the games available. */
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25 var games = {
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26 "rogue3": {
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27 "name": "Rogue V3",
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28 "uname": "rogue3",
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29 "path": "/bin/rogue3"
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30 },
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31 "rogue4": {
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32 "name": "Rogue V4",
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33 "uname": "rogue4",
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34 "path": "/bin/rogue4"
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35 },
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36 "rogue5": {
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37 "name": "Rogue V5",
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38 "uname": "rogue5",
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39 "path": "/bin/rogue5"
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40 },
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41 "srogue": {
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42 "name": "Super-Rogue",
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43 "uname": "srogue",
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44 "path": "/bin/srogue"
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45 }
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46 };
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48 /* Global state */
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49 var logins = {};
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50 var sessions = {};
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51 var allowlogin = true;
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52
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53 /* Constructor for TermSessions. Note that it opens the terminal and
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54 * adds itself to the sessions dict. It currently assumes the user has
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55 * been authenticated.
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56 */
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57 /* TODO take a callback, or emit success/err events. */
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58 function TermSession(game, user, dims) {
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59 /* First make sure starting the game will work. */
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60 if (game in games) {
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61 this.game = games[game];
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62 }
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63 else {
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64 // TODO: throw an exception instead
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65 return null;
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66 }
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67 this.player = String(user);
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68 /* This order seems to best avoid race conditions... */
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69 this.alive = false;
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70 this.sessid = randkey(2);
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71 while (this.sessid in sessions) {
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72 this.sessid = randkey(2);
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73 }
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74 /* Grab a spot in the sessions table. */
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75 sessions[this.sessid] = this;
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76 /* State for messaging. */
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77 this.nsend = 0;
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78 this.nrecv = 0;
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79 this.msgQ = []
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80 this.Qtimeout = null;
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81 /* Set up the sizes. */
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82 this.w = Math.floor(Number(dims[1]));
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