зеркало из https://github.com/mozilla/gecko-dev.git
98 строки
2.8 KiB
C++
98 строки
2.8 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsDownloader.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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#include "nsCRTGlue.h"
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nsDownloader::~nsDownloader() {
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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 = nullptr;
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}
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nsresult rv = mLocation->Remove(false);
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if (NS_FAILED(rv)) NS_ERROR("unable to remove temp file");
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}
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}
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NS_IMPL_ISUPPORTS(nsDownloader, nsIDownloader, 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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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) {
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nsresult rv;
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if (!mLocation) {
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nsCOMPtr<nsIFile> location;
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rv = NS_GetSpecialDirectory(NS_OS_TEMP_DIR, getter_AddRefs(location));
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if (NS_FAILED(rv)) return rv;
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char buf[13];
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NS_MakeRandomString(buf, 8);
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memcpy(buf + 8, ".tmp", 5);
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rv = location->AppendNative(nsDependentCString(buf, 12));
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if (NS_FAILED(rv)) return rv;
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rv = location->CreateUnique(nsIFile::NORMAL_FILE_TYPE, 0600);
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if (NS_FAILED(rv)) return rv;
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location.swap(mLocation);
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mLocationIsTemp = 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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return NS_OK;
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}
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NS_IMETHODIMP
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nsDownloader::OnStopRequest(nsIRequest* request, nsresult status) {
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if (mSink) {
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mSink->Close();
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mSink = nullptr;
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}
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mObserver->OnDownloadComplete(this, request, status, mLocation);
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mObserver = nullptr;
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return NS_OK;
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}
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nsresult nsDownloader::ConsumeData(nsIInputStream* in, void* closure,
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const char* fromRawSegment,
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uint32_t toOffset, uint32_t count,
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uint32_t* writeCount) {
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nsDownloader* self = (nsDownloader*)closure;
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if (self->mSink) 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, nsIInputStream* inStr,
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uint64_t sourceOffset, uint32_t count) {
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uint32_t n;
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return inStr->ReadSegments(ConsumeData, this, count, &n);
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}
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