Beesnest/DcRetrieveFile.cpp

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/*
Copyright 2007 Erez Bibi (erezbibi@users.sourceforge.net)
This file is part of Beesnest.

Beesnest 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.

Beesnest 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 Beesnest; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/


/**
 * DcRetrieveFile.cpp: Implamentation of CdcRetrieveFile class.
 * for documentation see the header file.
 */

#include "DcRetrieveFile.h"

CdcFileCacher CdcRetrieveFile::oFileCache;

CdcBuffer CdcRetrieveFile::GetData () throw (CdcException)
{
    if (oFileAttrib.IsFileFound () == false)
        throw (CdcExceptionFile (CdcString ("Cannot find the file - ") +
            oFileAttrib.GetURL (), DC_FILE_NOT_FOUND_EXP));
    CdcBuffer data; // GetFileSize ()
    /* Look for the file in the cache. */
    if (oFileAttrib.IsNotToCache () == false &&
        oFileCache.GetFile (oFileAttrib.GetFullName (),
            oFileAttrib.GetLastModified (), data) == true)
            return data;
    /* File is not in cache. */
    char temp [1024];
    int ret, mode = ios::in | ios::binary;
    /* Open file if it is not open. */
    if (oFile.is_open () == 0)
        oFile.open (oFileAttrib.GetFullName ().GetBuffer (), mode);
    if (oFile.is_open () == 0)
        throw (CdcExceptionFile (CdcString ("Cannot open the file - ") +
            oFileAttrib.GetURL (), DC_FILE_NOT_FOUND_EXP));
    /* Read file. */
    while (oFile.eof () == 0)
    {
        oFile.read (temp, 1000);
        ret = oFile.gcount ();
        data.Append (temp, ret);
    }
    oFile.close ();
    /* Put file in the cache. */
    if (oFileAttrib.IsNotToCache () == false)
        oFileCache.PutFile (oFileAttrib.GetFullName (),
            oFileAttrib.GetLastModified (), data);
    return data;
}