code: function streamFile(stats) {
    if (!invokedHtaccess.call(
      this,
      200,
      "onstreamfile",
      stats
    )) {
      var
        stream = fs.createReadStream(this.path, emptyObjet),
        acceptEncoding = contentEncoding(
          this.request.headers['accept-encoding']
        )
      ;
      commonStream["Content-Type"] = polpetta_type(this.ext);
      commonStream["Content-Length"] = stats.size;
      // TODO: avoid if already binary
      if (acceptEncoding) {
        //http://nodejs.org/api/zlib.html
        commonStream["Content-Encoding"] = acceptEncoding;
        stream = stream.pipe(acceptEncoding === "deflate" ?
          zlib.createDeflate() : zlib.createGzip()
        );
      }
      this.response.writeHead(200, commonStream);
      stream.on("error", internalServerError.bind(this));
      stream.pipe(this.response);
    }
  }
docs: once the file has been read ...