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/* -*- C++ -*- */
//=============================================================================
/**
* @file HTTP_Handler.h
*
* $Id$
*
* HTTP_Handler is a base class for HTTP_Reader and
* HTTP_Writer which are created in response to calls to
* read/write, as appropriate
*
*
* @author Stoyan Paunov
*/
//=============================================================================
#ifndef HTTP_HANDLER_H
#define HTTP_HANDLER_H
#include "ace/SOCK_Stream.h"
#include "ace/Svc_Handler.h"
#include "ace/Message_Block.h"
/**
* @class HTTP_Handler
* class to retrieve data via HTTP
*/
class HTTP_Handler : public ACE_Svc_Handler <ACE_SOCK_STREAM, ACE_NULL_SYNCH>
{
public:
/// Null constructor, insures that it works properly with Connector
HTTP_Handler (void);
/// Always use this constructor to make HTTP_Handlers
HTTP_Handler (ACE_Message_Block *mb,
ACE_TCHAR *filename);
/// returns the number of bytes read/written in the last operation.
size_t byte_count (void);
/// Activate this instance of the <HTTP_Handler>
virtual int open (void * = 0);
/// Close down the Blob
virtual int close (u_long flags = 0);
~HTTP_Handler (void);
protected:
virtual int send_request (void);
virtual int receive_reply (void);
ACE_Message_Block *mb_;
ACE_TCHAR *filename_;
size_t bytecount_;
enum
{
/// The handler assumes that the first 2048 bytes of a server response
/// contains the header
MAX_HEADER_SIZE = 2048,
/// set the MAX_TRANSMISSION_UNIT (MTU) = BUFSIZ as defined by OS
MTU = BUFSIZ
};
};
class HTTP_Reader : public HTTP_Handler
{
public:
HTTP_Reader (ACE_Message_Block *mb,
ACE_TCHAR *filename,
const char *request_prefix = "GET",
const char *request_suffix = "HTTP/1.0\r\n\r\n");
private:
//NOTE: these functions return -1 on error
int send_request (void);
int receive_reply (void);
const char *request_prefix_;
const char *request_suffix_;
};
#endif /* HTTP_HANDLER_H */
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