serve.js

/*global require, process */
(function() {
	var http = require('http'), posix = require('posix'), url = require('url'), cache = {}, mime_types = {};

	function extname(path) {
		var index = path.lastIndexOf('.');
		if (index < 0) {
			return;
		}
		return path.slice(index + 1);
	}

	http.createServer(function(req, res) {
		var parsed_url = url.parse(req.url), path = ('.' + parsed_url.pathname).replace(/\.{2,}\//g, './'), content = cache[path];
		if(content) {
			res.sendHeader(200, {'Content-Type': mime_types[extname(path)], 'Content-Length': content.length});
			res.sendBody(content, 'binary');
			res.finish();
		} else {
			posix.cat(path, 'binary').addCallback(function(content) {
				cache[path] = content;
				res.sendHeader(200, {'Content-Type': mime_types[extname(path)], 'Content-Length': content.length});
				res.sendBody(content, 'binary');
				res.finish();
			}).addErrback(function() {
				res.sendHeader(500, {'Content-Type': 'text/html'});
				res.sendBody('An error occurred when opening ' + path + '.');
				res.finish();
			});
		}
	}).listen(process.ARGV[2], process.ARGV[3]);

	mime_types = {
		'3gp'     : 'video/3gpp',
		'a'       : 'application/octet-stream',
		'ai'      : 'application/postscript',
		'aif'     : 'audio/x-aiff',
		'aiff'    : 'audio/x-aiff',
		'asc'     : 'application/pgp-signature',
		'asf'     : 'video/x-ms-asf',
		'asm'     : 'text/x-asm',
		'asx'     : 'video/x-ms-asf',
		'atom'    : 'application/atom+xml',
		'au'      : 'audio/basic',
		'avi'     : 'video/x-msvideo',
		'bat'     : 'application/x-msdownload',
		'bin'     : 'application/octet-stream',
		'bmp'     : 'image/bmp',
		'bz2'     : 'application/x-bzip2',
		'c'       : 'text/x-c',
		'cab'     : 'application/vnd.ms-cab-compressed',
		'cc'      : 'text/x-c',
		'chm'     : 'application/vnd.ms-htmlhelp',
		'class'   : 'application/octet-stream',
		'com'     : 'application/x-msdownload',
		'conf'    : 'text/plain',
		'cpp'     : 'text/x-c',
		'crt'     : 'application/x-x509-ca-cert',
		'css'     : 'text/css',
		'csv'     : 'text/csv',
		'cxx'     : 'text/x-c',
		'deb'     : 'application/x-debian-package',
		'der'     : 'application/x-x509-ca-cert',
		'diff'    : 'text/x-diff',
		'djv'     : 'image/vnd.djvu',
		'djvu'    : 'image/vnd.djvu',
		'dll'     : 'application/x-msdownload',
		'dmg'     : 'application/octet-stream',
		'doc'     : 'application/msword',
		'dot'     : 'application/msword',
		'dtd'     : 'application/xml-dtd',
		'dvi'     : 'application/x-dvi',
		'ear'     : 'application/java-archive',
		'eml'     : 'message/rfc822',
		'eps'     : 'application/postscript',
		'exe'     : 'application/x-msdownload',
		'f'       : 'text/x-fortran',
		'f77'     : 'text/x-fortran',
		'f90'     : 'text/x-fortran',
		'flv'     : 'video/x-flv',
		'for'     : 'text/x-fortran',
		'gem'     : 'application/octet-stream',
		'gemspec' : 'text/x-script.ruby',
		'gif'     : 'image/gif',
		'gz'      : 'application/x-gzip',
		'h'       : 'text/x-c',
		'hh'      : 'text/x-c',
		'htm'     : 'text/html',
		'html'    : 'text/html',
		'ico'     : 'image/vnd.microsoft.icon',
		'ics'     : 'text/calendar',
		'ifb'     : 'text/calendar',
		'iso'     : 'application/octet-stream',
		'jar'     : 'application/java-archive',
		'java'    : 'text/x-java-source',
		'jnlp'    : 'application/x-java-jnlp-file',
		'jpeg'    : 'image/jpeg',
		'jpg'     : 'image/jpeg',
		'js'      : 'application/javascript',
		'json'    : 'application/json',
		'log'     : 'text/plain',
		'm3u'     : 'audio/x-mpegurl',
		'm4v'     : 'video/mp4',
		'man'     : 'text/troff',
		'mathml'  : 'application/mathml+xml',
		'mbox'    : 'application/mbox',
		'mdoc'    : 'text/troff',
		'me'      : 'text/troff',
		'mid'     : 'audio/midi',
		'midi'    : 'audio/midi',
		'mime'    : 'message/rfc822',
		'mml'     : 'application/mathml+xml',
		'mng'     : 'video/x-mng',
		'mov'     : 'video/quicktime',
		'mp3'     : 'audio/mpeg',
		'mp4'     : 'video/mp4',
		'mp4v'    : 'video/mp4',
		'mpeg'    : 'video/mpeg',
		'mpg'     : 'video/mpeg',
		'ms'      : 'text/troff',
		'msi'     : 'application/x-msdownload',
		'odp'     : 'application/vnd.oasis.opendocument.presentation',
		'ods'     : 'application/vnd.oasis.opendocument.spreadsheet',
		'odt'     : 'application/vnd.oasis.opendocument.text',
		'ogg'     : 'application/ogg',
		'p'       : 'text/x-pascal',
		'pas'     : 'text/x-pascal',
		'pbm'     : 'image/x-portable-bitmap',
		'pdf'     : 'application/pdf',
		'pem'     : 'application/x-x509-ca-cert',
		'pgm'     : 'image/x-portable-graymap',
		'pgp'     : 'application/pgp-encrypted',
		'pkg'     : 'application/octet-stream',
		'pl'      : 'text/x-script.perl',
		'pm'      : 'text/x-script.perl-module',
		'png'     : 'image/png',
		'pnm'     : 'image/x-portable-anymap',
		'ppm'     : 'image/x-portable-pixmap',
		'pps'     : 'application/vnd.ms-powerpoint',
		'ppt'     : 'application/vnd.ms-powerpoint',
		'ps'      : 'application/postscript',
		'psd'     : 'image/vnd.adobe.photoshop',
		'py'      : 'text/x-script.python',
		'qt'      : 'video/quicktime',
		'ra'      : 'audio/x-pn-realaudio',
		'rake'    : 'text/x-script.ruby',
		'ram'     : 'audio/x-pn-realaudio',
		'rar'     : 'application/x-rar-compressed',
		'rb'      : 'text/x-script.ruby',
		'rdf'     : 'application/rdf+xml',
		'roff'    : 'text/troff',
		'rpm'     : 'application/x-redhat-package-manager',
		'rss'     : 'application/rss+xml',
		'rtf'     : 'application/rtf',
		'ru'      : 'text/x-script.ruby',
		's'       : 'text/x-asm',
		'sgm'     : 'text/sgml',
		'sgml'    : 'text/sgml',
		'sh'      : 'application/x-sh',
		'sig'     : 'application/pgp-signature',
		'snd'     : 'audio/basic',
		'so'      : 'application/octet-stream',
		'svg'     : 'image/svg+xml',
		'svgz'    : 'image/svg+xml',
		'swf'     : 'application/x-shockwave-flash',
		't'       : 'text/troff',
		'tar'     : 'application/x-tar',
		'tbz'     : 'application/x-bzip-compressed-tar',
		'tcl'     : 'application/x-tcl',
		'tex'     : 'application/x-tex',
		'texi'    : 'application/x-texinfo',
		'texinfo' : 'application/x-texinfo',
		'text'    : 'text/plain',
		'tif'     : 'image/tiff',
		'tiff'    : 'image/tiff',
		'torrent' : 'application/x-bittorrent',
		'tr'      : 'text/troff',
		'txt'     : 'text/plain',
		'vcf'     : 'text/x-vcard',
		'vcs'     : 'text/x-vcalendar',
		'vrml'    : 'model/vrml',
		'war'     : 'application/java-archive',
		'wav'     : 'audio/x-wav',
		'wma'     : 'audio/x-ms-wma',
		'wmv'     : 'video/x-ms-wmv',
		'wmx'     : 'video/x-ms-wmx',
		'wrl'     : 'model/vrml',
		'wsdl'    : 'application/wsdl+xml',
		'xbm'     : 'image/x-xbitmap',
		'xhtml'   : 'application/xhtml+xml',
		'xls'     : 'application/vnd.ms-excel',
		'xml'     : 'application/xml',
		'xpm'     : 'image/x-xpixmap',
		'xsl'     : 'application/xml',
		'xslt'    : 'application/xslt+xml',
		'yaml'    : 'text/yaml',
		'yml'     : 'text/yaml',
		'zip'     : 'application/zip'
	};
}());