gecko/netwerk/protocol/http/nsAHttpTransaction.h

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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2002
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Darin Fisher <darin@netscape.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsAHttpTransaction_h__
#define nsAHttpTransaction_h__
#include "nsISupports.h"
class nsAHttpConnection;
class nsAHttpSegmentReader;
class nsAHttpSegmentWriter;
class nsIInterfaceRequestor;
//----------------------------------------------------------------------------
// Abstract base class for a HTTP transaction:
//
// A transaction is a "sink" for the response data. The connection pushes
// data to the transaction by writing to it. The transaction supports
// WriteSegments and may refuse to accept data if its buffers are full (its
// write function returns NS_BASE_STREAM_WOULD_BLOCK in this case).
//----------------------------------------------------------------------------
class nsAHttpTransaction : public nsISupports
{
public:
// called by the connection when it takes ownership of the transaction.
virtual void SetConnection(nsAHttpConnection *) = 0;
// called by the connection to get security callbacks to set on the
// socket transport.
virtual void GetSecurityCallbacks(nsIInterfaceRequestor **) = 0;
// called to report socket status (see nsITransportEventSink)
virtual void OnTransportStatus(nsresult status, PRUint64 progress) = 0;
// called to check the transaction status.
virtual PRBool IsDone() = 0;
virtual nsresult Status() = 0;
// called to find out how much request data is available for writing.
virtual PRUint32 Available() = 0;
// called to read request data from the transaction.
virtual nsresult ReadSegments(nsAHttpSegmentReader *reader,
PRUint32 count, PRUint32 *countRead) = 0;
// called to write response data to the transaction.
virtual nsresult WriteSegments(nsAHttpSegmentWriter *writer,
PRUint32 count, PRUint32 *countWritten) = 0;
// called to close the transaction
virtual void Close(nsresult reason) = 0;
};
#define NS_DECL_NSAHTTPTRANSACTION \
void SetConnection(nsAHttpConnection *); \
void GetSecurityCallbacks(nsIInterfaceRequestor **); \
void OnTransportStatus(nsresult status, PRUint64 progress); \
PRBool IsDone(); \
nsresult Status(); \
PRUint32 Available(); \
nsresult ReadSegments(nsAHttpSegmentReader *, PRUint32, PRUint32 *); \
nsresult WriteSegments(nsAHttpSegmentWriter *, PRUint32, PRUint32 *); \
void Close(nsresult reason);
//-----------------------------------------------------------------------------
// nsAHttpSegmentReader
//-----------------------------------------------------------------------------
class nsAHttpSegmentReader
{
public:
// any returned failure code stops segment iteration
virtual nsresult OnReadSegment(const char *segment,
PRUint32 count,
PRUint32 *countRead) = 0;
};
#define NS_DECL_NSAHTTPSEGMENTREADER \
nsresult OnReadSegment(const char *, PRUint32, PRUint32 *);
//-----------------------------------------------------------------------------
// nsAHttpSegmentWriter
//-----------------------------------------------------------------------------
class nsAHttpSegmentWriter
{
public:
// any returned failure code stops segment iteration
virtual nsresult OnWriteSegment(char *segment,
PRUint32 count,
PRUint32 *countWritten) = 0;
};
#define NS_DECL_NSAHTTPSEGMENTWRITER \
nsresult OnWriteSegment(char *, PRUint32, PRUint32 *);
#endif // nsAHttpTransaction_h__