fu.js

var createServer = require("http").createServer;
var readFile = require("fs").readFile;
var sys = require("util");
var url = require("url");
DEBUG = false;

var fu = exports;

var NOT_FOUND = "Not Found\n";

function notFound(req, res) {
    res.writeHead(404, {
        "Content-Type": "text/plain",
        "Content-Length": NOT_FOUND.length
    });
    res.end(NOT_FOUND);
}

var getMap = {};

fu.get = function(path, handler) {
    getMap[path] = handler;
};

var server = createServer(function(req, res) {
    if (req.method === "GET" || req.method === "HEAD") {
        var handler = getMap[url.parse(req.url).pathname] || notFound;

        res.simpleText = function(code, body) {
            res.writeHead(code, {
                "Content-Type": "text/plain",
                "Content-Length": body.length
            });
            res.end(body);
        };

        res.simpleJSON = function(code, obj) {
            var body = new Buffer(JSON.stringify(obj));
            res.writeHead(code, {
                "Content-Type": "text/json",
                "Content-Length": body.length
            });
            res.end(body);
        };

        handler(req, res);
    }
});

fu.listen = function(port, host) {
    server.listen(port, host);
};

fu.close = function() {
    server.close();
};

function extname(path) {
    var index = path.lastIndexOf(".");
    return index < 0 ? "" : path.substring(index);
}

fu.staticHandler = function(filename) {
    var body, headers;
    var content_type = fu.mime.lookupExtension(extname(filename));

    function loadResponseData(callback) {
        if (body && headers && !DEBUG) {
            callback();
            return;
        }

        sys.puts("loading " + filename + "...");
        readFile(filename, function(err, data) {
            if (err) {
                sys.puts("Error loading " + filename);
            }
            else {
                body = data;
                headers = {
                    "Content-Type": content_type,
                    "Content-Length": body.length
                };
                if (!DEBUG) headers["Cache-Control"] = "public";
                sys.puts("static file " + filename + " loaded");
                callback();
            }
        });
    }

    return function(req, res) {
        loadResponseData(function() {
            res.writeHead(200, headers);
            res.end(req.method === "HEAD" ? "" : body);
        });
    }
};

// stolen from jack- thanks
fu.mime = {
    // returns MIME type for extension, or fallback, or octet-steam
    lookupExtension: function(ext, fallback) {
        return fu.mime.TYPES[ext.toLowerCase()] || fallback || 'application/octet-stream';
    },

    // List of most common mime-types, stolen from Rack.
    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"
    }
};