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//
// ExternalTransport.h
//
// ExternalTransport: Allows external programs to retrieve given URLs with
// unknown protocols.
//
// Part of the ht://Dig package <http://www.htdig.org/>
// Copyright (c) 1995-2004 The ht://Dig Group
// For copyright details, see the file COPYING in your distribution
// or the GNU Library General Public License (LGPL) version 2 or later
// <http://www.gnu.org/copyleft/lgpl.html>
//
// $Id: ExternalTransport.h,v 1.5 2004/05/28 13:15:14 lha Exp $
//
#ifndef _ExternalTransport_h_
#define _ExternalTransport_h_
#include "Transport.h"
#include "htString.h"
#include <stdio.h>
// First we must declare a derived Transport_Response class
// This requires declaring the main class in advance
class ExternalTransport;
class ExternalTransport_Response : public Transport_Response
{
friend class ExternalTransport;
// Nothing else... We just want it so we can access the protected fields
};
// Right, now we get on with the show...
class ExternalTransport : public Transport
{
public:
//
// Construction/Destruction
//
ExternalTransport(const String &protocol);
virtual ~ExternalTransport();
//
// Check if the given protocol has a handler
//
static int canHandle(const String &protocol);
// Setting connections is obviously a bit different than the base class
// from a URL pointer
void SetConnection (URL *u);
// from a URL object
void SetConnection (URL &u)
{ SetConnection (&u); }
// Make the request
DocStatus Request();
// Get the response or the status
Transport_Response *GetResponse() { return _Response; }
DocStatus GetDocumentStatus() { return GetDocumentStatus(_Response); }
private:
// The command to handle the current protocol
String _Handler;
// And the current protocol
String _Protocol;
// The URL to Request()
URL _URL;
// The result of the Request()
ExternalTransport_Response *_Response;
// Private helper to read in the result from the handler
int readLine(FILE *, String &);
// Work out the DocStatus from the HTTP-style status codes
DocStatus GetDocumentStatus(ExternalTransport_Response *r);
};
#endif
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