gecko/netwerk/protocol/http/nsAHttpConnection.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 nsAHttpConnection_h__
#define nsAHttpConnection_h__
#include "nsISupports.h"
class nsAHttpTransaction;
class nsHttpRequestHead;
class nsHttpResponseHead;
class nsHttpConnectionInfo;
//-----------------------------------------------------------------------------
// Abstract base class for a HTTP connection
//-----------------------------------------------------------------------------
class nsAHttpConnection : public nsISupports
{
public:
//-------------------------------------------------------------------------
// NOTE: these methods may only be called on the socket thread.
//-------------------------------------------------------------------------
//
// called by a transaction when the response headers have all been read.
// the connection can force the transaction to reset it's response headers,
// and prepare for a new set of response headers, by setting |*reset=TRUE|.
//
// @return failure code to close the transaction.
//
virtual nsresult OnHeadersAvailable(nsAHttpTransaction *,
nsHttpRequestHead *,
nsHttpResponseHead *,
PRBool *reset) = 0;
//
// called by a transaction to resume either sending or receiving data
// after a transaction returned NS_BASE_STREAM_WOULD_BLOCK from its
// ReadSegments/WriteSegments methods.
//
virtual nsresult ResumeSend() = 0;
virtual nsresult ResumeRecv() = 0;
//
// called by the connection manager to close a transaction being processed
// by this connection.
//
// @param transaction
// the transaction being closed.
// @param reason
// the reason for closing the transaction. NS_BASE_STREAM_CLOSED
// is equivalent to NS_OK.
//
virtual void CloseTransaction(nsAHttpTransaction *transaction,
nsresult reason) = 0;
// get a reference to the connection's connection info object.
virtual void GetConnectionInfo(nsHttpConnectionInfo **) = 0;
// called by a transaction to get the security info from the socket.
virtual void GetSecurityInfo(nsISupports **) = 0;
// called by a transaction to determine whether or not the connection is
// persistent... important in determining the end of a response.
virtual PRBool IsPersistent() = 0;
// called to determine if a connection has been reused.
virtual PRBool IsReused() = 0;
// called by a transaction when the transaction reads more from the socket
// than it should have (eg. containing part of the next pipelined response).
virtual nsresult PushBack(const char *data, PRUint32 length) = 0;
// Used by a transaction to manage the state of previous response bodies on
// the same connection and work around buggy servers.
virtual PRBool LastTransactionExpectedNoContent() = 0;
virtual void SetLastTransactionExpectedNoContent(PRBool) = 0;
};
#define NS_DECL_NSAHTTPCONNECTION \
nsresult OnHeadersAvailable(nsAHttpTransaction *, nsHttpRequestHead *, nsHttpResponseHead *, PRBool *reset); \
nsresult ResumeSend(); \
nsresult ResumeRecv(); \
void CloseTransaction(nsAHttpTransaction *, nsresult); \
void GetConnectionInfo(nsHttpConnectionInfo **); \
void GetSecurityInfo(nsISupports **); \
PRBool IsPersistent(); \
PRBool IsReused(); \
nsresult PushBack(const char *, PRUint32); \
PRBool LastTransactionExpectedNoContent(); \
void SetLastTransactionExpectedNoContent(PRBool);
#endif // nsAHttpConnection_h__