зеркало из https://github.com/mozilla/gecko-dev.git
115 строки
3.2 KiB
C++
115 строки
3.2 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 "nsIOutputStream.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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{
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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))
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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_ISUPPORTS(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;
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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,
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nsISupports *ctxt,
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nsresult status)
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{
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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, ctxt, status, mLocation);
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mObserver = nullptr;
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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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uint32_t toOffset,
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uint32_t count,
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uint32_t *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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uint64_t sourceOffset, uint32_t count)
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{
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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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