/* <!-- copyright */
/*
 * aria2 - The high speed download utility
 *
 * Copyright (C) 2006 Tatsuhiro Tsujikawa
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * In addition, as a special exception, the copyright holders give
 * permission to link the code of portions of this program with the
 * OpenSSL library under certain conditions as described in each
 * individual source file, and distribute linked combinations
 * including the two.
 * You must obey the GNU General Public License in all respects
 * for all of the code used other than OpenSSL.  If you modify
 * file(s) with this exception, you may extend this exception to your
 * version of the file(s), but you are not obligated to do so.  If you
 * do not wish to do so, delete this exception statement from your
 * version.  If you delete this exception statement from all source
 * files in the program, then also delete it here.
 */
/* copyright --> */
#ifndef _D_HTTP_HEADER_PROCESSOR_H_
#define _D_HTTP_HEADER_PROCESSOR_H_

#include "common.h"
#include "SharedHandle.h"
#include <utility>
#include <string>

namespace aria2 {

class HttpHeader;

class HttpHeaderProcessor {
private:
  std::string buf_;
  size_t limit_;

  void checkHeaderLimit(size_t incomingLength);

public:
  HttpHeaderProcessor();

  ~HttpHeaderProcessor();

  void update(const unsigned char* data, size_t length);

  void update(const std::string& data);

  /**
   * Returns true if end of header is reached.
   */
  bool eoh() const;

  /**
   * Retruns the number of bytes beyond the end of header.
   */
  size_t getPutBackDataLength() const;

  /**
   * Processes the received header as a http response header and returns
   * HttpHeader object.
   */
  SharedHandle<HttpHeader> getHttpResponseHeader();

  SharedHandle<HttpHeader> getHttpRequestHeader();

  std::string getHeaderString() const;

  void clear();

  void setHeaderLimit(size_t limit)
  {
    limit_ = limit;
  }
};

typedef SharedHandle<HttpHeaderProcessor> HttpHeaderProcessorHandle;

} // namespace aria2

#endif // _D_HTTP_HEADER_PROCESSOR_H_