/* <!-- 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 "HttpConnection.h"
#include "Util.h"
#include "message.h"
#include "prefs.h"
#include "LogFactory.h"
#include "DlRetryEx.h"
#include "DlAbortEx.h"
#include "Request.h"
#include "Segment.h"
#include "HttpRequest.h"
#include "HttpResponse.h"
#include "HttpHeaderProcessor.h"
#include "HttpHeader.h"
#include "Logger.h"
#include "Socket.h"
#include <sstream>

namespace aria2 {

HttpRequestEntry::HttpRequestEntry(const HttpRequestHandle& httpRequest,
				   const HttpHeaderProcessorHandle& proc):
  _httpRequest(httpRequest),
  _proc(proc) {}

HttpRequestEntry::~HttpRequestEntry() {}

HttpRequestHandle HttpRequestEntry::getHttpRequest() const
{
  return _httpRequest;
}

HttpHeaderProcessorHandle HttpRequestEntry::getHttpHeaderProcessor() const
{
  return _proc;
}

HttpConnection::HttpConnection(int32_t cuid,
			       const SocketHandle& socket,
			       const Option* op):
  cuid(cuid), socket(socket), option(op), logger(LogFactory::getInstance())
{}

std::string HttpConnection::eraseConfidentialInfo(const std::string& request)
{
  std::istringstream istr(request);
  std::ostringstream ostr;
  std::string line;
  while(getline(istr, line)) {
    if(Util::startsWith(line, "Authorization: Basic")) {
      ostr << "Authorization: Basic ********\n";
    } else if(Util::startsWith(line, "Proxy-Authorization: Basic")) {
      ostr << "Proxy-Authorization: Basic ********\n";
    } else {
      ostr << line << "\n";
    }
  }
  return ostr.str();
}

void HttpConnection::sendRequest(const HttpRequestHandle& httpRequest)
{
  std::string request = httpRequest->createRequest();
  logger->info(MSG_SENDING_REQUEST, cuid, eraseConfidentialInfo(request).c_str());
  socket->writeData(request.c_str(), request.size());
  outstandingHttpRequests.push_back(new HttpRequestEntry(httpRequest,
							 new HttpHeaderProcessor()));
}

void HttpConnection::sendProxyRequest(const HttpRequestHandle& httpRequest)
{
  std::string request = httpRequest->createProxyRequest();
  logger->info(MSG_SENDING_REQUEST, cuid, eraseConfidentialInfo(request).c_str());
  socket->writeData(request.c_str(), request.size());
  outstandingHttpRequests.push_back(new HttpRequestEntry(httpRequest,
							 new HttpHeaderProcessor()));
}

HttpResponseHandle HttpConnection::receiveResponse()
{
  if(outstandingHttpRequests.size() == 0) {
    throw new DlAbortEx(EX_NO_HTTP_REQUEST_ENTRY_FOUND);
  }
  HttpRequestEntryHandle entry = outstandingHttpRequests.front();
  HttpHeaderProcessorHandle proc = entry->getHttpHeaderProcessor();

  char buf[512];
  int32_t size = sizeof(buf);
  socket->peekData(buf, size);
  if(size == 0) {
    throw new DlRetryEx(EX_INVALID_RESPONSE);
  }
  proc->update(buf, size);
  if(!proc->eoh()) {
    socket->readData(buf, size);
    return 0;
  }
  int32_t putbackDataLength = proc->getPutBackDataLength();
  size -= putbackDataLength;
  socket->readData(buf, size);

  // OK, we got all headers.
  logger->info(MSG_RECEIVE_RESPONSE, cuid, proc->getHeaderString().c_str());

  std::pair<std::string, HttpHeaderHandle> httpStatusHeader = proc->getHttpStatusHeader();
  if(Util::toLower(httpStatusHeader.second->getFirst("Connection")).find("close") != std::string::npos) {
    entry->getHttpRequest()->getRequest()->setKeepAlive(false);
  }

  HttpResponseHandle httpResponse = new HttpResponse();
  httpResponse->setCuid(cuid);
  httpResponse->setStatus(Util::parseInt(httpStatusHeader.first));
  httpResponse->setHttpHeader(httpStatusHeader.second);
  httpResponse->setHttpRequest(entry->getHttpRequest());

  outstandingHttpRequests.pop_front();

  return httpResponse;
}

bool HttpConnection::isIssued(const SegmentHandle& segment) const
{
  for(HttpRequestEntries::const_iterator itr = outstandingHttpRequests.begin();
      itr != outstandingHttpRequests.end(); ++itr) {
    HttpRequestHandle httpRequest = (*itr)->getHttpRequest();
    if(httpRequest->getSegment() == segment) {
      return true;
    }
  }
  return false;
}

} // namespace aria2
