vos/corelibs/typechain/handlers/type_wininet.cc

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/* URL handler for Windows */

/*

    Copyright (C) 2001, 2002 Frank Richter <resqu@gmx.ch>

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
*/


#include "type_wininet.hh"

#include <stdio.h>


/* Called when loaded as a plugin */

extern "C" void plugin_init(void *registerHandler){
#ifdef HAVE_LIBWININET
   ( (void (*)(TypeHandler*)) registerHandler )(new TypeWinInet("url") );
   ( (void (*)(TypeHandler*)) registerHandler )(new TypeWinInet("URL") );
#endif
}


/* Constructor */

TypeWinInet::TypeWinInet(string name) : TypeHandler(name, "url") {
#ifdef HAVE_LIBWININET
    internet = InternetOpen("URLTypeHandler", INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
    if (!internet)
    {
       fprintf(stderr, "WinInet: InternetOpen() failed with %.8x\n", GetLastError());
    }
#endif
}

TypeWinInet::~TypeWinInet() {
#ifdef HAVE_LIBWININET
    if (internet) InternetCloseHandle(internet);
#endif
}

#ifndef HAVE_LIBWININET

void TypeWinInet::decode(string& data, TypeParams& params)
{
}

#else

void TypeWinInet::decode(string& data, TypeParams& params)
{
    if (!internet) return;

    fprintf(stderr, "WinInet URL Handler: retrieving %s ...\n", data.c_str());

    HINTERNET conn =
     InternetOpenUrl(internet, data.c_str(), NULL, 0,
       INTERNET_FLAG_EXISTING_CONNECT | INTERNET_FLAG_HYPERLINK,
       0);
    if (!conn)
    {
       DWORD error = GetLastError();
       if (error == ERROR_INTERNET_EXTENDED_ERROR)
       {
           char exterror[255];
           DWORD exterrorlen = sizeof(exterror);
           DWORD dummy;
           if (InternetGetLastResponseInfo(&dummy, &exterror[0], &exterrorlen))
           {
               throw TypeChain::DecodeError(exterror, "url");
           }
       }
       throw TypeChain::DecodeError("Something happened", "url");
    }

    char buffer[4096];
    DWORD bytesread;

    data = "";
    while (InternetReadFile(conn, &buffer[0], sizeof(buffer), &bytesread) && bytesread)
    {
       data += string(buffer, bytesread);
    }

    InternetCloseHandle(conn);

    fprintf(stderr, "URL Handler: done.\n");
}
#endif

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