include/dlvhex2/URLBuf.h

Go to the documentation of this file.

/* dlvhex -- Answer-Set Programming with external interfaces.
 * Copyright (C) 2005-2007 Roman Schindlauer
 * Copyright (C) 2006-2015 Thomas Krennwallner
 * Copyright (C) 2009-2016 Peter Schüller
 * Copyright (C) 2011-2016 Christoph Redl
 * Copyright (C) 2015-2016 Tobias Kaminski
 * Copyright (C) 2015-2016 Antonius Weinzierl
 *
 * This file is part of dlvhex.
 *
 * dlvhex 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 2.1 of
 * the License, or (at your option) any later version.
 *
 * dlvhex 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 dlvhex; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 */

#if !defined(_DLVHEX_URLBUF_H)
#define _DLVHEX_URLBUF_H

#include "dlvhex2/PlatformDefinitions.h"

#ifdef HAVE_LIBCURL

#include <iostream>
#include <streambuf>
#include <string>

#include <curl/curl.h>

DLVHEX_NAMESPACE_BEGIN

class DLVHEX_EXPORT URLBuf : public std::streambuf
{
    public:
        URLBuf();

        URLBuf(const URLBuf& u);

        virtual
            ~URLBuf();

        virtual void
            open(const std::string& url);

        virtual long
            responsecode() const;

    private:
        std::streambuf::char_type* ibuf;

        unsigned bufsize;

        CURL* easy_handle;

        long response;

        static size_t
            writer(void *ptr, size_t size, size_t nmemb, void *stream);

        size_t
            write(void* ptr, size_t size);

    protected:
        virtual std::streambuf::int_type
            underflow();
};

DLVHEX_NAMESPACE_END
#endif                           // _DLVHEX_URLBUF_H
#endif


// vim:expandtab:ts=4:sw=4:
// mode: C++
// End: