OW_HTTPLenLimitIStream.hpp

Go to the documentation of this file.

/*******************************************************************************
* Copyright (C) 2001-2004 Vintela, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
*  - Redistributions of source code must retain the above copyright notice,
*    this list of conditions and the following disclaimer.
*
*  - 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.
*
*  - Neither the name of Vintela, Inc. nor the names of its
*    contributors may be used to endorse or promote products derived from this
*    software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``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 Vintela, Inc. OR THE CONTRIBUTORS
* 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.
*******************************************************************************/

#ifndef OW_HTTPLENLIMITSTREAM_HPP_INCLUDE_GUARD_
#define OW_HTTPLENLIMITSTREAM_HPP_INCLUDE_GUARD_
#include "OW_config.h"
#include "OW_Types.hpp"
#include "OW_BaseStreamBuffer.hpp"
#include "OW_AutoPtr.hpp"
#include "OW_CIMProtocolIStreamIFC.hpp"

namespace OW_NAMESPACE
{

class OW_HTTP_API HTTPLengthLimitStreamBuffer : public BaseStreamBuffer
{
public:
   HTTPLengthLimitStreamBuffer(std::istream& istr, UInt64 length);
   virtual ~HTTPLengthLimitStreamBuffer();
   void resetLen(UInt64 len);
protected:
   virtual int buffer_from_device(char* c, int n);
private:
   std::istream& m_istr;
   
   // holds the content length.
   UInt64 m_length;
   // keeps track of how much we've read.
   UInt64 m_pos;
   // keeps track if we are at end of length.
   bool m_isEnd;
   // prohibit copying and assigning
   // NO IMPLEMENTATION
   HTTPLengthLimitStreamBuffer(const HTTPLengthLimitStreamBuffer& arg);
   HTTPLengthLimitStreamBuffer& operator=(
         const HTTPLengthLimitStreamBuffer& arg);
};
class OW_HTTP_API HTTPLenLimitIStreamBase
{
public:
   HTTPLenLimitIStreamBase(std::istream& istr, UInt64 length)
      : m_strbuf(istr, length) {}
   HTTPLengthLimitStreamBuffer m_strbuf;
};
class OW_HTTP_API HTTPLenLimitIStream : private HTTPLenLimitIStreamBase,
   public CIMProtocolIStreamIFC
{
public:
   HTTPLenLimitIStream(std::istream& istr, UInt64 len);
   void resetLen(UInt64 len);
private:
   std::istream& m_istr;
   
   // don't allow copying and assigning.
   // NO IMPLEMENTATION
   HTTPLenLimitIStream(const HTTPLenLimitIStream& arg);
   HTTPLenLimitIStream& operator=(const HTTPLenLimitIStream& arg);
};

} // end namespace OW_NAMESPACE

#endif

---