/* <!-- 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 --> */
#include "NsCookieParser.h"

#include <cstdio>
#include <cstring>
#include <limits>

#include "util.h"
#include "A2STR.h"
#include "DlAbortEx.h"
#include "fmt.h"
#include "Cookie.h"
#include "cookie_helper.h"
#include "BufferedFile.h"
#include "array_fun.h"

namespace aria2 {

NsCookieParser::NsCookieParser() {}

NsCookieParser::~NsCookieParser() {}

namespace {
bool parseNsCookie
(Cookie& cookie, const char* buf, size_t buflen, time_t creationTime)
{
  std::vector<Scip> vs;
  util::splitIter(&buf[0], &buf[buflen], std::back_inserter(vs), '\t', true);
  if(vs.size() < 6) {
    return false;
  }
  vs[0].first = util::lstripIter(vs[0].first, vs[0].second, '.');
  if(vs[5].first == vs[5].second || vs[0].first == vs[0].second ||
     !cookie::goodPath(vs[2].first, vs[2].second)) {
    return false;
  }
  int64_t expiryTime;
  if(!util::parseLLIntNoThrow(expiryTime, vs[4].first, vs[4].second)) {
    return false;
  }
  if(std::numeric_limits<time_t>::max() < expiryTime) {
    expiryTime = std::numeric_limits<time_t>::max();
  } else if(std::numeric_limits<time_t>::min() > expiryTime) {
    expiryTime = std::numeric_limits<time_t>::min();
  }
  cookie.setName(vs[5].first, vs[5].second);
  if(vs.size() >= 7) {
    cookie.setValue(vs[6].first, vs[6].second);
  } else {
    cookie.setValue(A2STR::NIL.begin(), A2STR::NIL.end());
  }
  cookie.setExpiryTime(expiryTime == 0?
                       std::numeric_limits<time_t>::max():expiryTime);
  // aria2 treats expiryTime == 0 means session cookie.
  cookie.setPersistent(expiryTime != 0);
  cookie.setDomain(vs[0].first, vs[0].second);
  const char C_TRUE[] = "TRUE";
  cookie.setHostOnly(util::isNumericHost(cookie.getDomain()) ||
                     !util::streq(vs[1].first, vs[1].second,
                                  C_TRUE, vend(C_TRUE)-1));
  cookie.setPath(vs[2].first, vs[2].second);
  cookie.setSecure(util::streq(vs[3].first, vs[3].second,
                               C_TRUE, vend(C_TRUE)-1));
  cookie.setCreationTime(creationTime);
  return true;
}
} // namespace

std::vector<Cookie> NsCookieParser::parse
(const std::string& filename, time_t creationTime)
{
  BufferedFile fp(filename, BufferedFile::READ);
  if(!fp) {
    throw DL_ABORT_EX(fmt("Failed to open file %s", filename.c_str()));
  }
  std::vector<Cookie> cookies;
  char buf[8192];
  while(1) {
    if(!fp.getsn(buf, sizeof(buf))) {
      break;
    }
    size_t len = strlen(buf);
    if(len == 0 || buf[0] == '#') {
      continue;
    }
    Cookie c;
    if(parseNsCookie(c, buf, len, creationTime)) {
      cookies.push_back(c);
    }
  }
  return cookies;
}

} // namespace aria2