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Initial commit (a clone of the jsmachines project as of v1.15.3)

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jeffpar 2014-09-27 14:52:57 -07:00
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/**
* @fileoverview Node web server for pcjs.org
* @author <a href="mailto:Jeff@pcjs.org">Jeff Parsons</a> (@jeffpar)
* @version 1.0
* Created 2014-02-01
*
* Copyright © 2012-2014 Jeff Parsons <Jeff@pcjs.org>
*
* This file is part of the JavaScript Machines Project (aka JSMachines) at <http://jsmachines.net/>
* and <http://pcjs.org/>.
*
* JSMachines is free software: you can redistribute it and/or modify it under the terms of the
* GNU General Public License as published by the Free Software Foundation, either version 3
* of the License, or (at your option) any later version.
*
* JSMachines is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
* even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with JSMachines.
* If not, see <http://www.gnu.org/licenses/gpl.html>.
*
* You are required to include the above copyright notice in every source code file of every
* copy or modified version of this work, and to display that copyright notice on every screen
* that loads or runs any version of this software (see Computer.sCopyright).
*
* Some JSMachines files also attempt to load external resource files, such as character-image files,
* ROM files, and disk image files. Those external resource files are not considered part of the
* JSMachines Project for purposes of the GNU General Public License, and the author does not claim
* any copyright as to their contents.
*/
/*
* Usage
* ---
* node server.js [options]
*
* The options supported are basically just pass-through options for the HTMLOut module;
* (eg, --cache, --console, --debug, --rebuild, and --sockets). See HTMLOut for details.
*
* Options specific to this module include --logging, which turns on our own private logging
* (redundant when running on a service like Azure), and --sockets (which we also pass on to
* HTMLOut so that it can enable/disable client-side socket support).
*/
"use strict";
var fs = require("fs");
var path = require("path");
var http = require("http");
var express = require("express");
var slash = require("express-slash");
var proclib = require("./my_modules/shared/lib/proclib");
var args = proclib.getArgs();
var fCache = (args.argv['cache'] === undefined? true : args.argv['cache']);
var fConsole = (args.argv['console'] === undefined? false : args.argv['console']);
var fDebug = (args.argv['debug'] === undefined? false : args.argv['debug']);
var fLogging = (args.argv['logging'] === undefined? false : args.argv['logging']);
var fRebuild = (args.argv['rebuild'] === undefined? false : args.argv['rebuild']);
var fSockets = (args.argv['sockets'] === undefined? false : args.argv['sockets']);
var sServerRoot = __dirname;
var HTMLOut = require("./my_modules/htmlout");
HTMLOut.setRoot(sServerRoot);
/*
* In a production environment, you probably want to leave the 'console',
* 'debug' and 'rebuild' options OFF, which is why we warn if they're enabled.
*/
if (fConsole || fDebug || fRebuild) console.log("warning: non-production options enabled");
HTMLOut.setOptions({'cache': fCache, 'console': fConsole, 'debug': fDebug, 'rebuild': fRebuild, 'sockets': fSockets});
var app = express();
app.enable("strict routing");
app.set('port', process.env.PORT || 8088);
/*
* I already include the following in the <head> tag of my HTML documents:
*
* <link rel="shortcut icon" href="/versions/images/current/favicon.ico" type="image/x-icon">
*
* and if remove that line, browsers stop displaying my favicon, so I'm not sure what the
* following code is doing for me. TODO: Find out!
*/
app.use(express.favicon(path.join(sServerRoot, "./versions/images/current/favicon.ico")));
/*
* For more information about express.logger():
*
* http://www.senchalabs.org/connect/logger.html
*
* NOTE: use {flags: 'a'} to open in append mode instead of write mode. The latter is the default,
* so that a simple server restart will generate a new log file.
*
* TODO: Consider some simple rotation scheme to retain at least a few previous log files.
*/
if (fLogging) {
var streamLog = fs.createWriteStream(path.join(sServerRoot, "./logs/node.log"), {flags: 'w'});
HTMLOut.setOptions({'logfile': streamLog});
app.use(express.logger({ format: 'default', stream: streamLog }));
}
app.use(express.json({limit: '4mb'}));
app.use(express.urlencoded({limit: '4mb'}));
app.use(HTMLOut.filter);
app.use(express.compress());
/*
* The following hack ensures that our JavaScript files are delivered as UTF-8 files.
* You can tell when they're not: the copyright symbol (©) in my file headers doesn't
* display properly.
*
* TODO: Determine if we have any other UTF-8 files that Express fails to deliver as such.
*/
app.use(function(req, res, next) {
if (/.*\.(js|json)$/.test(req.path)) {
res.charset = "utf-8";
}
next();
});
app.use(express.static(sServerRoot));
app.use(slash());
var server = http.createServer(app).listen(app.get('port'), function() {
if (fConsole) console.log('Express server listening on port ' + app.get('port'));
});
/*
* socket.io support is still very experimental, so it should not be enabled by default
*/
if (fSockets) {
var io = require('socket.io').listen(server);
io.sockets.on('connection', function(socket) {
if (fConsole) console.log('A new user connected!');
socket.emit('info', { msg: 'The world is round, there is no up or down.' });
});
}