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115 lines
4.9 KiB
C++
115 lines
4.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#ifndef nsMsgProtocol_h__
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#define nsMsgProtocol_h__
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#include "nsIStreamListener.h"
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#include "nsIInputStream.h"
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#include "nsIOutputStream.h"
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#include "nsIEventQueue.h"
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#include "nsIChannel.h"
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#include "nsIURL.h"
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#include "nsILoadGroup.h"
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#include "nsCOMPtr.h"
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// This is a helper class used to encapsulate code shared between all of the
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// mailnews protocol objects (imap, news, pop, smtp, etc.) In particular,
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// it unifies the core networking code for the protocols. My hope is that
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// this will make unification with Necko easier as we'll only have to change
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// this class and not all of the mailnews protocols.
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class NS_MSG_BASE nsMsgProtocol : public nsIStreamListener, public nsIChannel
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{
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public:
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nsMsgProtocol(nsIURI * aURL, nsIURI* originalURI);
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virtual ~nsMsgProtocol();
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NS_DECL_ISUPPORTS
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// nsIChannel support
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NS_DECL_NSICHANNEL
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NS_DECL_NSIREQUEST
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NS_DECL_NSISTREAMLISTENER
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NS_DECL_NSISTREAMOBSERVER
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// LoadUrl -- A protocol typically overrides this function, sets up any local state for the url and
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// then calls the base class which opens the socket if it needs opened. If the socket is
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// already opened then we just call ProcessProtocolState to start the churning process.
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// aConsumer is the consumer for the url. It can be null if this argument is not appropriate
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virtual nsresult LoadUrl(nsIURI * aURL, nsISupports * aConsumer = nsnull);
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virtual nsresult SetUrl(nsIURI * aURL); // sometimes we want to set the url before we load it
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// Flag manipulators
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PRBool TestFlag (PRUint32 flag) {return flag & m_flags;}
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void SetFlag (PRUint32 flag) { m_flags |= flag; }
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void ClearFlag (PRUint32 flag) { m_flags &= ~flag; }
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protected:
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// methods for opening and closing a socket with core netlib....
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// mscott -okay this is lame. I should break this up into a file protocol and a socket based
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// protocool class instead of cheating and putting both methods here...
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virtual nsresult OpenNetworkSocket(nsIURI * aURL); // open a connection on this url
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virtual nsresult OpenFileSocket(nsIURI * aURL, const nsFileSpec * aFileSpec, PRUint32 aStartPosition, PRInt32 aReadCount); // used to open a file socket connection
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// a Protocol typically overrides this method. They free any of their own connection state and then
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// they call up into the base class to free the generic connection objects
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virtual nsresult CloseSocket();
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virtual nsresult SetupTransportState(); // private method used by OpenNetworkSocket and OpenFileSocket
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// ProcessProtocolState - This is the function that gets churned by calls to OnDataAvailable.
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// As data arrives on the socket, OnDataAvailable calls ProcessProtocolState.
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virtual nsresult ProcessProtocolState(nsIURI * url, nsIInputStream * inputStream,
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PRUint32 sourceOffset, PRUint32 length) = 0;
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// SendData -- Writes the data contained in dataBuffer into the current output stream.
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// It also informs the transport layer that this data is now available for transmission.
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// Returns a positive number for success, 0 for failure (not all the bytes were written to the
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// stream, etc).
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virtual PRInt32 SendData(nsIURI * aURL, const char * dataBuffer);
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virtual nsresult PostMessage(nsIURI* url, nsIFileSpec * fileSpec);
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// Ouput stream for writing commands to the socket
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nsCOMPtr<nsIChannel> m_channel;
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nsCOMPtr<nsIOutputStream> m_outputStream; // this will be obtained from the transport interface
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PRBool m_socketIsOpen; // mscott: we should look into keeping this state in the nsSocketTransport...
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// I'm using it to make sure I open the socket the first time a URL is loaded into the connection
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PRUint32 m_flags; // used to store flag information
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PRUint32 m_startPosition;
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PRInt32 m_readCount;
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nsFileSpec m_tempMsgFileSpec; // we currently have a hack where displaying a msg involves writing it to a temp file first
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// the following is a catch all for nsIChannel related data
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nsCOMPtr<nsIURI> m_originalUrl; // the original url
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nsCOMPtr<nsIURI> m_url; // the running url
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nsCOMPtr<nsIStreamListener> m_channelListener;
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nsCOMPtr<nsISupports> m_channelContext;
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nsCOMPtr<nsILoadGroup> m_loadGroup;
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};
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#endif /* nsMsgProtocol_h__ */
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