Back to index

lightning-sunbird  0.9+nobinonly
nsSimpleStreamListener.cpp
Go to the documentation of this file.
00001 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is mozilla.org code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 2001
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   Darin Fisher <darin@netscape.com> (original author)
00024  *
00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either the GNU General Public License Version 2 or later (the "GPL"), or
00027  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00028  * in which case the provisions of the GPL or the LGPL are applicable instead
00029  * of those above. If you wish to allow use of your version of this file only
00030  * under the terms of either the GPL or the LGPL, and not to allow others to
00031  * use your version of this file under the terms of the MPL, indicate your
00032  * decision by deleting the provisions above and replace them with the notice
00033  * and other provisions required by the GPL or the LGPL. If you do not delete
00034  * the provisions above, a recipient may use your version of this file under
00035  * the terms of any one of the MPL, the GPL or the LGPL.
00036  *
00037  * ***** END LICENSE BLOCK ***** */
00038 
00039 #include "nsSimpleStreamListener.h"
00040 
00041 //
00042 //----------------------------------------------------------------------------
00043 // nsISupports implementation...
00044 //----------------------------------------------------------------------------
00045 //
00046 NS_IMPL_ISUPPORTS3(nsSimpleStreamListener,
00047                    nsISimpleStreamListener,
00048                    nsIStreamListener,
00049                    nsIRequestObserver)
00050 
00051 //
00052 //----------------------------------------------------------------------------
00053 // nsIRequestObserver implementation...
00054 //----------------------------------------------------------------------------
00055 //
00056 NS_IMETHODIMP
00057 nsSimpleStreamListener::OnStartRequest(nsIRequest *aRequest,
00058                                        nsISupports *aContext)
00059 {
00060     return mObserver ?
00061         mObserver->OnStartRequest(aRequest, aContext) : NS_OK;
00062 }
00063 
00064 NS_IMETHODIMP
00065 nsSimpleStreamListener::OnStopRequest(nsIRequest* request,
00066                                       nsISupports *aContext,
00067                                       nsresult aStatus)
00068 {
00069     return mObserver ?
00070         mObserver->OnStopRequest(request, aContext, aStatus) : NS_OK;
00071 }
00072 
00073 //
00074 //----------------------------------------------------------------------------
00075 // nsIStreamListener implementation...
00076 //----------------------------------------------------------------------------
00077 //
00078 NS_IMETHODIMP
00079 nsSimpleStreamListener::OnDataAvailable(nsIRequest* request,
00080                                         nsISupports *aContext,
00081                                         nsIInputStream *aSource,
00082                                         PRUint32 aOffset,
00083                                         PRUint32 aCount)
00084 {
00085     PRUint32 writeCount;
00086     nsresult rv = mSink->WriteFrom(aSource, aCount, &writeCount);
00087     //
00088     // Equate zero bytes read and NS_SUCCEEDED to stopping the read.
00089     //
00090     if (NS_SUCCEEDED(rv) && (writeCount == 0))
00091         return NS_BASE_STREAM_CLOSED;
00092     return rv;
00093 }
00094 
00095 //
00096 //----------------------------------------------------------------------------
00097 // nsISimpleStreamListener implementation...
00098 //----------------------------------------------------------------------------
00099 //
00100 NS_IMETHODIMP
00101 nsSimpleStreamListener::Init(nsIOutputStream *aSink,
00102                              nsIRequestObserver *aObserver)
00103 {
00104     NS_PRECONDITION(aSink, "null output stream");
00105 
00106     mSink = aSink;
00107     mObserver = aObserver;
00108 
00109     return NS_OK;
00110 }