var fs = require("fs");

XMLHttpRequest = function() {

  var self = this,

      info = self._info = {},

      headers = {},

      url;

  // TODO handle file system errors?

  self.open = function(m, u, a) {

    info.url = u;

    info.async = a;

    Object.freeze(info);

    self.send = a ? read : readSync;

  };

  self.overrideMimeType = function(x) {

    info.mimeType = x;

  };

  function read() {

    fs.readFile(info.url, "binary", function(e, d) {

      if (e) {

        self.status = 404; // assumed

      } else {

        self.status = 200;

        self.responseText = d;

        self.responseXML = {_xml: d};

        headers["Content-Length"] = d.length;

      }

      self.readyState = 4;

      XMLHttpRequest._last = self;

      if (self.onreadystatechange) self.onreadystatechange();

    });

  }

  function readSync() {

    try {

      var d = fs.readFileSync(info.url, "binary");

      self.status = 200;

      self.responseText = d;

      self.responseXML = {_xml: d};

      headers["Content-Length"] = d.length;

    } catch (e) {

      self.status = 404; // assumed

    }

    self.readyState = 4;

    XMLHttpRequest._last = self;

    if (self.onreadystatechange) self.onreadystatechange();

  }

  self.getResponseHeader = function(n) {

    return headers[n];

  };

};