fu.js

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

var fu = exports;

var NOT_FOUND = "Not Found\n";

function notFound(req, res) {
  res.sendHeader(404, [ ["Content-Type", "text/plain"]
                      , ["Content-Length", NOT_FOUND.length]
                      ]);
  res.write(NOT_FOUND);
  res.close();
}

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.sendHeader(code, [ ["Content-Type", "text/plain"]
                           , ["Content-Length", body.length]
                           ]);
      res.write(body);
      res.close();
    };

    res.simpleJSON = function (code, obj) {
      var body = JSON.stringify(obj);
      res.sendHeader(code, [ ["Content-Type", "text/json"]
                           , ["Content-Length", body.length]
                           ]);
      res.write(body);
      res.close();
    };

    handler(req, res);
  }
});

fu.listen = function (port, host) {
  server.listen(port, host);
  sys.puts("Server at http://" + (host || "127.0.0.1") + ":" + port.toString() + "/");
};

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));
  var encoding = (content_type.slice(0,4) === "text" ? "utf8" : "binary");

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

    sys.puts("loading " + filename + "...");
    readFile(filename, encoding, 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.push(["Cache-Control", "public"]);
         
        sys.puts("static file " + filename + " loaded");
        callback();
      }
    });
  }

  return function (req, res) {
    loadResponseData(function () {
      res.sendHeader(200, headers);
      res.write(body, encoding);
      res.close();
    });
  }
};

// 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"
          }
};