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// -*- C++ -*-
//=============================================================================
/**
* @file HttpCharStream.h
*
* $Id$
*
* @author Krishnakumar B <kitty@cs.wustl.edu>
*/
//=============================================================================
#ifndef _ACEXML_HTTPCHARSTREAM_H_
#define _ACEXML_HTTPCHARSTREAM_H_
#include /**/ "ace/pre.h"
#include "ACEXML/common/ACEXML_Export.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
#pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ACEXML/common/CharStream.h"
#include "ACEXML/common/URL_Addr.h"
#include "ACEXML/common/Mem_Map_Stream.h"
/**
* @class ACEXML_HttpCharStream HttpCharStream.h "ACEXML/common/HttpCharStream.h"
*
* An implementation of ACEXML_CharStream for reading input from a URL.
*/
class ACEXML_Export ACEXML_HttpCharStream : public ACEXML_CharStream
{
public:
/// Default constructor.
ACEXML_HttpCharStream (void);
/// Destructor
virtual ~ACEXML_HttpCharStream (void);
/// Open an URL.
int open (const ACEXML_Char *url);
/**
* Returns the available ACEXML_Char in the buffer. -1
* if the object is not initialized properly.
*/
virtual int available (void);
/**
* Close this stream and release all resources used by it.
*/
virtual int close (void);
/**
* Read the next ACEXML_Char. Return -1 if we are not able to
* return an ACEXML_Char, 0 if EOS is reached, or 1 if succeed.
*/
virtual int get (ACEXML_Char& ch);
/**
* Read the next batch of ACEXML_Char strings
*/
virtual int read (ACEXML_Char *str, size_t len);
/**
* Peek the next ACEXML_Char in the CharStream. Return the
* character if succeess, -1 if EOS is reached.
*/
virtual int peek (void);
/**
* Resets the file pointer to the beginning of the stream.
*/
virtual void rewind (void);
/**
* Determine the encoding of the file.
*/
virtual int determine_encoding (void);
/**
* Get the encoding of the file
*/
virtual const ACEXML_Char* getEncoding (void);
/*
* Get the systemId for the underlying CharStream
*/
virtual const ACEXML_Char* getSystemId (void);
private:
#if defined (ACE_USES_WCHAR)
/**
* Read the next character from the stream taking into account the
* encoding of the file.
*/
int get_i (ACEXML_Char& ch);
/**
* Read the next character from the stream taking into account the
* encoding of the file. Subsequent call to get() returns this
* character.
*/
int peek_i (void);
#endif /* ACE_USES_WCHAR */
/**
* Send a HTTP/1.1 request to fetch the contents of the URL.
*/
int send_request (void);
/**
* Fetch the URL and save it in backing store.
*/
int get_url (size_t& len);
ACEXML_Char *url_;
ACEXML_URL_Addr* url_addr_;
ACEXML_Mem_Map_Stream* stream_;
Connector* connector_;
off_t size_;
off_t data_offset_;
ACEXML_Char* encoding_;
};
#include /**/ "ace/post.h"
#endif /* _ACEXML_HTTPCHARSTREAM_H_ */
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