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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <string>
#include "base/strings/string_piece.h"
#include "net/base/net_export.h"
#include "net/http/http_util.h"
namespace net {
// Breaks up a challenge string into the the auth scheme and parameter list,
// according to RFC 2617 Sec 1.2:
// challenge = auth-scheme 1*SP 1#auth-param
// Depending on the challenge scheme, it may be appropriate to interpret the
// parameters as either a base-64 encoded string or a comma-delimited list
// of name-value pairs. param_pairs() and base64_param() methods are provided
// to support either usage.
class NET_EXPORT_PRIVATE HttpAuthChallengeTokenizer {
HttpAuthChallengeTokenizer(std::string::const_iterator begin,
std::string::const_iterator end);
// Get the original text.
std::string challenge_text() const {
return std::string(begin_, end_);
// Get the authenthication scheme of the challenge. The returned scheme is
// always lowercase.
const std::string& auth_scheme() const { return lower_case_scheme_; }
std::string::const_iterator params_begin() const { return params_begin_; }
std::string::const_iterator params_end() const { return params_end_; }
HttpUtil::NameValuePairsIterator param_pairs() const;
std::string base64_param() const;
void Init(std::string::const_iterator begin,
std::string::const_iterator end);
std::string::const_iterator begin_;
std::string::const_iterator end_;
std::string::const_iterator params_begin_;
std::string::const_iterator params_end_;
std::string lower_case_scheme_;
} // namespace net