if (hashIndex >= 0) {
      hashStr = url.substring(hashIndex);
      buf.push("&hash=");
      buf.push(encodeURIComponent(hashStr));
      buf.push(hashStr);
    }
  });

  $result.on("click", "a.favorite", function(e) {
    var $favorite = $(this),
        values = $favorite.attr("href").split("#"),
        actionUrl,
        docId;
    if (values.length === 2 && $queryId.length > 0) {

		s.writeErrorResponse(w, errInvalidArgument)
		return
	}
	var verifier *BitrotVerifier
	if r.Form.Get(storageRESTBitrotAlgo) != "" {
		hashStr := r.Form.Get(storageRESTBitrotHash)
		var hash []byte
		hash, err = hex.DecodeString(hashStr)
		if err != nil {
			s.writeErrorResponse(w, err)
			return
		}
		verifier = NewBitrotVerifier(BitrotAlgorithmFromString(r.Form.Get(storageRESTBitrotAlgo)), hash)