mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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193 lines
6.5 KiB
C++
193 lines
6.5 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2003
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Darin Fisher <darin@netscape.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsDownloader.h"
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#include "nsICachingChannel.h"
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#include "nsIInputStream.h"
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#include "nsDirectoryServiceUtils.h"
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#include "nsDirectoryServiceDefs.h"
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#include "nsNetUtil.h"
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// XXX this code is ripped from profile/src/nsProfile.cpp and is further
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// duplicated in uriloader/exthandler. this should probably be moved
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// into xpcom or some other shared library.
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#include <stdlib.h>
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#define TABLE_SIZE 36
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static const char table[] =
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{ 'a','b','c','d','e','f','g','h','i','j',
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'k','l','m','n','o','p','q','r','s','t',
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'u','v','w','x','y','z','0','1','2','3',
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'4','5','6','7','8','9' };
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static void
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MakeRandomString(char *buf, PRInt32 bufLen)
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{
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// turn PR_Now() into milliseconds since epoch
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// and salt rand with that.
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double fpTime;
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LL_L2D(fpTime, PR_Now());
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srand((uint)(fpTime * 1e-6 + 0.5)); // use 1e-6, granularity of PR_Now() on the mac is seconds
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PRInt32 i;
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for (i=0;i<bufLen;i++) {
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*buf++ = table[rand()%TABLE_SIZE];
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}
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*buf = 0;
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}
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// XXX
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nsDownloader::~nsDownloader()
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{
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if (mLocation && mLocationIsTemp) {
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// release the sink first since it may still hold an open file
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// descriptor to mLocation. this needs to happen before the
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// file can be removed otherwise the Remove call will fail.
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if (mSink) {
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mSink->Close();
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mSink = nsnull;
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}
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nsresult rv = mLocation->Remove(PR_FALSE);
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if (NS_FAILED(rv))
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NS_ERROR("unable to remove temp file");
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}
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}
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NS_IMPL_ISUPPORTS3(nsDownloader,
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nsIDownloader,
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nsIStreamListener,
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nsIRequestObserver)
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NS_IMETHODIMP
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nsDownloader::Init(nsIDownloadObserver *observer, nsIFile *location)
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{
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mObserver = observer;
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mLocation = location;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsDownloader::OnStartRequest(nsIRequest *request, nsISupports *ctxt)
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{
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nsresult rv = NS_ERROR_FAILURE;
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if (!mLocation) {
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nsCOMPtr<nsICachingChannel> caching = do_QueryInterface(request, &rv);
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if (NS_SUCCEEDED(rv))
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rv = caching->SetCacheAsFile(PR_TRUE);
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}
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if (NS_FAILED(rv)) {
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// OK, we will need to stream the data to disk ourselves. Make
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// sure mLocation exists.
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if (!mLocation) {
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rv = NS_GetSpecialDirectory(NS_OS_TEMP_DIR, getter_AddRefs(mLocation));
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if (NS_FAILED(rv)) return rv;
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char buf[13];
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MakeRandomString(buf, 8);
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memcpy(buf+8, ".tmp", 5);
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rv = mLocation->AppendNative(nsDependentCString(buf, 12));
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if (NS_FAILED(rv)) return rv;
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rv = mLocation->CreateUnique(nsIFile::NORMAL_FILE_TYPE, 0600);
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if (NS_FAILED(rv)) return rv;
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mLocationIsTemp = PR_TRUE;
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}
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rv = NS_NewLocalFileOutputStream(getter_AddRefs(mSink), mLocation);
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if (NS_FAILED(rv)) return rv;
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// we could wrap this output stream with a buffered output stream,
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// but it shouldn't be necessary since we will be writing large
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// chunks given to us via OnDataAvailable.
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}
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return rv;
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}
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NS_IMETHODIMP
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nsDownloader::OnStopRequest(nsIRequest *request,
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nsISupports *ctxt,
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nsresult status)
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{
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if (!mSink && NS_SUCCEEDED(status)) {
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nsCOMPtr<nsICachingChannel> caching = do_QueryInterface(request, &status);
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if (NS_SUCCEEDED(status)) {
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status = caching->GetCacheFile(getter_AddRefs(mLocation));
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if (NS_SUCCEEDED(status)) {
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NS_ASSERTION(mLocation, "success without a cache file");
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// ok, then we need to hold a reference to the cache token in
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// order to ensure that the cache file remains valid until we
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// get destroyed.
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caching->GetCacheToken(getter_AddRefs(mCacheToken));
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}
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}
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}
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else if (mSink) {
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mSink->Close();
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mSink = nsnull;
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}
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mObserver->OnDownloadComplete(this, request, ctxt, status, mLocation);
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mObserver = nsnull;
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return NS_OK;
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}
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NS_METHOD
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nsDownloader::ConsumeData(nsIInputStream* in,
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void* closure,
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const char* fromRawSegment,
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PRUint32 toOffset,
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PRUint32 count,
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PRUint32 *writeCount)
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{
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nsDownloader *self = (nsDownloader *) closure;
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if (self->mSink)
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return self->mSink->Write(fromRawSegment, count, writeCount);
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*writeCount = count;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsDownloader::OnDataAvailable(nsIRequest *request, nsISupports *ctxt,
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nsIInputStream *inStr,
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PRUint32 sourceOffset, PRUint32 count)
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{
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PRUint32 n;
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return inStr->ReadSegments(ConsumeData, this, count, &n);
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}
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