
#ifdef _WIN32
#include<windows.h>
#include<wininet.h>
#endif

#ifndef DWORD_PTR
#define DWORD_PTR DWORD
#endif

#include<common/io/HTTPInputSource.h>
#include<common/Vector.h>

HTTPInputSource::HTTPInputSource(const String *basePath, HTTPInputSource *base){
  if (isRelative(basePath) && base != null)
    baseLocation = getAbsolutePath(base->getLocation(), basePath);
  else
    baseLocation = new SString(basePath);
  stream = null;
};
HTTPInputSource::~HTTPInputSource(){
  delete baseLocation;
  delete[] stream;
};
InputSource *HTTPInputSource::createRelative(const String *relPath){
  return new HTTPInputSource(relPath, this);
};

const String *HTTPInputSource::getLocation() const{
  return baseLocation;
};

const byte *HTTPInputSource::openStream()
{
  if (stream != null) throw InputSourceException(StringBuffer("openStream(): source stream already opened: '")+baseLocation+"'");

#ifdef __unix__
  throw InputSourceException(DString("not avaiable in unix version"));
#endif
#ifdef _WIN32
  const int blockSize = 0x1000;
  Vector<byte*> streamVector;
  Vector<int> streamSizeVector;

  HINTERNET ihandle = InternetOpen("Colorer-take5 library connector", INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, 0);
  if (ihandle == NULL) throw InputSourceException(StringBuffer("Can't create internet connection"));

  DWORD dw;
  HINTERNET iurl = InternetOpenUrl(ihandle, baseLocation->getChars(), NULL, 0, INTERNET_FLAG_PRAGMA_NOCACHE|INTERNET_FLAG_NO_UI, (DWORD_PTR)&dw);
  if (iurl == NULL) throw InputSourceException(StringBuffer("Can't access URL '")+baseLocation+"'");

  len = 0;
  DWORD bread;
  BOOL ok = TRUE;
  while(true){
    byte *block = new byte[blockSize];

    ok = InternetReadFile(iurl, block, blockSize, &bread);

    if (ok == FALSE || bread == 0) break;
    streamVector.addElement(block);
    streamSizeVector.addElement(bread);
    len += bread;
  };
  if (ok == FALSE){
    throw InputSourceException(StringBuffer("Can't read http stream: ")+baseLocation);
  }else{
    stream = new byte[len];
    int csize = 0;
    for(int idx = 0; idx < streamVector.size(); idx++){
      int thisSize = streamSizeVector.elementAt(idx);
      memmove(stream + csize, streamVector.elementAt(idx), thisSize);
      csize += thisSize;
    };
  };
  for(int idx = 0; idx < streamVector.size(); idx++){
    delete streamVector.elementAt(idx);
  };

  InternetCloseHandle(iurl);
  InternetCloseHandle(ihandle);
#endif
  return stream;
};

void HTTPInputSource::closeStream(){
  if (stream == null) throw InputSourceException(StringBuffer("closeStream(): source stream is not yet opened"));
  delete[] stream;
  stream = null;
};

int HTTPInputSource::length() const{
  if (stream == null)
    throw InputSourceException(DString("length(): stream is not yet opened"));
  return len;
};

/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Colorer Library.
 *
 * The Initial Developer of the Original Code is
 * Cail Lomecb <cail@nm.ru>.
 * Portions created by the Initial Developer are Copyright (C) 1999-2003
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */
