urlistream.h

将HTML转换为TXT文件的程序

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/*
 * Copyright (c) 1999
 *      GMRS Software GmbH, Innsbrucker Ring 159, 81669 Munich, Germany.
 *      http://www.gmrs.de
 *      All rights reserved.
 *      Author: Arno Unkrig ([e-mail])
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by GMRS Software GmbH.
 * 4. The name of GMRS Software GmbH may not be used to endorse or promote
 *    products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY GMRS SOFTWARE GMBH ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL GMRS SOFTWARE GMBH BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

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#ifndef __urlistream_h_INCLUDED__ /* { */
#define __urlistream_h_INCLUDED__

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#ident "$Id: urlistream.h,v 1.4 1999/10/26 10:57:16 arno Exp $"

#include <fstream.h>
#include <string>

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/*
 * Similar to an "ifstream", but "open()" is overloaded: Pass an URL instead
 * of a file name.
 */
class urlistream : public ifstream {

public:
  enum { default_timeout = 10000 };

  urlistream() : open_error_(0) {}
  urlistream(
    const char *url,
    int        timeout = default_timeout   // Milliseconds
  ) : open_error_(0) { open(url, timeout); }
  urlistream(
    const string &url,
    int          timeout = default_timeout   // Milliseconds
  ) : open_error_(0) { open(url, timeout); }

  void open(
    const char *url,
    int        timeout = default_timeout   // Milliseconds
  );
  void open(
    const string &url,
    int          timeout = default_timeout   // Milliseconds
  );
  int is_open() const { return ((urlistream *) this)->rdbuf()->is_open(); }
  const char *open_error() const;

private:
  void http_open(const char *address, int timeout);
  void file_open(const char *file_name);

  const char *open_error_;
};

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#endif /* } */

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