//
// ApacheStream.h
//
// $Id: //poco/1.4/ApacheConnector/include/ApacheStream.h#2 $
//
// Copyright (c) 2006-2011, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#ifndef ApacheConnector_ApacheStream_INCLUDED
#define ApacheConnector_ApacheStream_INCLUDED


#include "ApacheConnector.h"
#include "Poco/BufferedStreamBuf.h"
#include <istream>
#include <ostream>


class ApacheStreamBuf: public Poco::BufferedStreamBuf
	/// This is the streambuf class used for reading from and writing to a socket.
{
public:
	ApacheStreamBuf(ApacheRequestRec* pApacheRequest, bool haveData = false);
		/// Creates a ApacheStreamBuf with the given socket.

	~ApacheStreamBuf();
		/// Destroys the SocketStreamBuf.

protected:
	int readFromDevice(char* buffer, std::streamsize length);
	int writeToDevice(const char* buffer, std::streamsize length);

private:
	enum 
	{
		STREAM_BUFFER_SIZE = 1024
	};

	ApacheRequestRec* _pApacheRequest;
	bool  _haveData;
};


class ApacheIOS: public virtual std::ios
	/// The base class for ApacheStream, ApacheInputStream and
	/// ApacheOutputStream.
	///
	/// This class is needed to ensure the correct initialization
	/// order of the stream buffer and base classes.
{
public:
	ApacheIOS(ApacheRequestRec* pApacheRequest, bool haveData = false);
		/// Creates the ApacheIOS with the given socket.
		
	~ApacheIOS();
		/// Destroys the ApacheIOS.
		///
		/// Flushes the buffer, but does not close the socket.
		
	ApacheStreamBuf* rdbuf();
		/// Returns a pointer to the internal ApacheStreamBuf.
		
	void close();
		/// Flushes the stream.

protected:
	ApacheStreamBuf _buf;
};


class ApacheOutputStream: public ApacheIOS, public std::ostream
	/// An output stream for writing to an Apache response.
{
public:
	ApacheOutputStream(ApacheRequestRec* pApacheRequest);
		/// Creates the ApacheOutputStream with the given socket.

	~ApacheOutputStream();
		/// Destroys the ApacheOutputStream.
		///
		/// Flushes the buffer.
};


class ApacheInputStream: public ApacheIOS, public std::istream
	/// An input stream for reading from an Apache request.
	///
	/// Using formatted input from a ApacheInputStream
	/// is not recommended, due to the read-ahead behavior of
	/// istream with formatted reads.
{
public:
	ApacheInputStream(ApacheRequestRec* pApacheRequest);
		/// Creates the ApacheInputStream with the given socket.

	~ApacheInputStream();
		/// Destroys the ApacheInputStream.
};


#endif // ApacheConnector_ApacheStream_INCLUDED