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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsDownloader.h"
#include "nsIInputStream.h"
#include "nsIOutputStream.h"
#include "nsDirectoryServiceUtils.h"
#include "nsDirectoryServiceDefs.h"
#include "nsNetUtil.h"
#include "nsCRTGlue.h"
nsDownloader::~nsDownloader() {
if (mLocation && mLocationIsTemp) {
// release the sink first since it may still hold an open file
// descriptor to mLocation. this needs to happen before the
// file can be removed otherwise the Remove call will fail.
if (mSink) {
mSink->Close();
mSink = nullptr;
}
nsresult rv = mLocation->Remove(false);
if (NS_FAILED(rv)) NS_ERROR("unable to remove temp file");
}
}
NS_IMPL_ISUPPORTS(nsDownloader, nsIDownloader, nsIStreamListener,
nsIRequestObserver)
NS_IMETHODIMP
nsDownloader::Init(nsIDownloadObserver* observer, nsIFile* location) {
mObserver = observer;
mLocation = location;
return NS_OK;
}
NS_IMETHODIMP
nsDownloader::OnStartRequest(nsIRequest* request) {
nsresult rv;
if (!mLocation) {
nsCOMPtr<nsIFile> location;
rv = NS_GetSpecialDirectory(NS_OS_TEMP_DIR, getter_AddRefs(location));
if (NS_FAILED(rv)) return rv;
char buf[13];
NS_MakeRandomString(buf, 8);
memcpy(buf + 8, ".tmp", 5);
rv = location->AppendNative(nsDependentCString(buf, 12));
if (NS_FAILED(rv)) return rv;
rv = location->CreateUnique(nsIFile::NORMAL_FILE_TYPE, 0600);
if (NS_FAILED(rv)) return rv;
location.swap(mLocation);
mLocationIsTemp = true;
}
rv = NS_NewLocalFileOutputStream(getter_AddRefs(mSink), mLocation);
if (NS_FAILED(rv)) return rv;
// we could wrap this output stream with a buffered output stream,
// but it shouldn't be necessary since we will be writing large
// chunks given to us via OnDataAvailable.
return NS_OK;
}
NS_IMETHODIMP
nsDownloader::OnStopRequest(nsIRequest* request, nsresult status) {
if (mSink) {
mSink->Close();
mSink = nullptr;
}
mObserver->OnDownloadComplete(this, request, status, mLocation);
mObserver = nullptr;
return NS_OK;
}
nsresult nsDownloader::ConsumeData(nsIInputStream* in, void* closure,
const char* fromRawSegment,
uint32_t toOffset, uint32_t count,
uint32_t* writeCount) {
nsDownloader* self = (nsDownloader*)closure;
if (self->mSink) return self->mSink->Write(fromRawSegment, count, writeCount);
*writeCount = count;
return NS_OK;
}
NS_IMETHODIMP
nsDownloader::OnDataAvailable(nsIRequest* request, nsIInputStream* inStr,
uint64_t sourceOffset, uint32_t count) {
uint32_t n;
return inStr->ReadSegments(ConsumeData, this, count, &n);
}
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