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/* -*- C++ -*- */
// $Id$
//============================================================================
//
// = LIBRARY
// JAWS
//
// = FILENAME
// Blob.h
//
// = DESCRIPTION
// ACE_Blob_Handler is a base class for ACE_Blob_Reader and
// ACE_Blob_Writer which are created in response to calls to
// read/write, as appropriate
//
// = AUTHOR
// Prashant Jain and Sumedh Mungee
//
//============================================================================
#if !defined (ACE_BLOB_HANDLER_H)
#define ACE_BLOB_HANDLER_H
#include "ace/OS.h"
#include "ace/SOCK_Stream.h"
#include "ace/Svc_Handler.h"
#include "ace/Message_Block.h"
class ACE_Blob_Handler : public ACE_Svc_Handler <ACE_SOCK_STREAM, ACE_NULL_SYNCH>
// = TITLE
// Blob is intended to provide application API to
// classes that wish to do network i/o at a very
// high level of abstraction.
//
// = This class provides the ability to retrieve data from
// the network, of specified length and offset, and potentially
// use any protocol "under the hood" to do so. It currently
// uses HTTP. See Blob_Handler also.
{
public:
ACE_Blob_Handler (void);
// Null constructor, insures that it works properly with Connector
ACE_Blob_Handler (ACE_Message_Block *mb, size_t length, size_t offset, char *filename);
// Always use this constructor to make Blob_Handlers
int byte_count (void);
// returns the number of bytes read/written in the last operation.
virtual int open (void * = 0);
// Activate this instance of the <ACE_Blob_Handler>
virtual int close (u_long flags = 0);
// Close down the Blob
~ACE_Blob_Handler (void);
protected:
virtual int send_request (void);
virtual int receive_reply (void);
ACE_Message_Block *mb_;
size_t length_;
size_t offset_;
char *filename_;
int bytecount_;
enum
{
MAX_HEADER_SIZE = 2048
// The handler assumes that the first 2048 bytes of a server response
// contains the header
};
};
class ACE_Blob_Reader : public ACE_Blob_Handler
{
public:
ACE_Blob_Reader (ACE_Message_Block *mb,
size_t length,
size_t offset,
char *filename,
char *request_prefix = "GET",
char *request_suffix = "HTTP/1.0\r\n\r\n");
private:
int send_request (void);
int receive_reply (void);
const char *request_prefix_;
const char *request_suffix_;
};
class ACE_Blob_Writer : public ACE_Blob_Handler
{
public:
ACE_Blob_Writer (ACE_Message_Block *mb,
size_t length,
size_t offset,
char *filename,
char *request_prefix = "PUT",
char *request_suffix = "HTTP/1.0\nContent-length:");
private:
int send_request (void);
int receive_reply (void);
const char *request_prefix_;
const char *request_suffix_;
};
#endif /* ACE_BLOB_HANDLER_H */
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