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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsStreamLoader.h"
#include "nsIInputStream.h"
#include "nsIChannel.h"
#include "nsError.h"
#include "GeckoProfiler.h"
#include <limits>
namespace mozilla {
namespace net {
nsStreamLoader::nsStreamLoader()
: mData()
{
}
nsStreamLoader::~nsStreamLoader()
{
}
NS_IMETHODIMP
nsStreamLoader::Init(nsIStreamLoaderObserver* aStreamObserver,
nsIRequestObserver* aRequestObserver)
{
NS_ENSURE_ARG_POINTER(aStreamObserver);
mObserver = aStreamObserver;
mRequestObserver = aRequestObserver;
return NS_OK;
}
nsresult
nsStreamLoader::Create(nsISupports *aOuter, REFNSIID aIID, void **aResult)
{
if (aOuter) return NS_ERROR_NO_AGGREGATION;
nsStreamLoader* it = new nsStreamLoader();
if (it == nullptr)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(it);
nsresult rv = it->QueryInterface(aIID, aResult);
NS_RELEASE(it);
return rv;
}
NS_IMPL_ISUPPORTS(nsStreamLoader, nsIStreamLoader,
nsIRequestObserver, nsIStreamListener,
nsIThreadRetargetableStreamListener)
NS_IMETHODIMP
nsStreamLoader::GetNumBytesRead(uint32_t* aNumBytes)
{
*aNumBytes = mBytesRead;
return NS_OK;
}
NS_IMETHODIMP
nsStreamLoader::GetRequest(nsIRequest **aRequest)
{
NS_IF_ADDREF(*aRequest = mRequest);
return NS_OK;
}
NS_IMETHODIMP
nsStreamLoader::OnStartRequest(nsIRequest* request, nsISupports *ctxt)
{
nsCOMPtr<nsIChannel> chan( do_QueryInterface(request) );
if (chan) {
int64_t contentLength = -1;
chan->GetContentLength(&contentLength);
if (contentLength >= 0) {
if (uint64_t(contentLength) > std::numeric_limits<size_t>::max()) {
// Too big to fit into size_t, so let's bail.
return NS_ERROR_OUT_OF_MEMORY;
}
// preallocate buffer
if (!mData.initCapacity(contentLength)) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
}
mContext = ctxt;
if (mRequestObserver) {
mRequestObserver->OnStartRequest(request, ctxt);
}
return NS_OK;
}
NS_IMETHODIMP
nsStreamLoader::OnStopRequest(nsIRequest* request, nsISupports *ctxt,
nsresult aStatus)
{
PROFILER_LABEL("nsStreamLoader", "OnStopRequest",
js::ProfileEntry::Category::NETWORK);
if (mObserver) {
// provide nsIStreamLoader::request during call to OnStreamComplete
mRequest = request;
size_t length = mData.length();
uint8_t* elems = mData.extractOrCopyRawBuffer();
nsresult rv = mObserver->OnStreamComplete(this, mContext, aStatus,
length, elems);
if (rv != NS_SUCCESS_ADOPTED_DATA) {
// The observer didn't take ownership of the extracted data buffer, so
// put it back into mData.
mData.replaceRawBuffer(elems, length);
}
// done.. cleanup
ReleaseData();
mRequest = nullptr;
mObserver = nullptr;
mContext = nullptr;
}
if (mRequestObserver) {
mRequestObserver->OnStopRequest(request, ctxt, aStatus);
mRequestObserver = nullptr;
}
return NS_OK;
}
nsresult
nsStreamLoader::WriteSegmentFun(nsIInputStream *inStr,
void *closure,
const char *fromSegment,
uint32_t toOffset,
uint32_t count,
uint32_t *writeCount)
{
nsStreamLoader *self = (nsStreamLoader *) closure;
if (!self->mData.append(fromSegment, count)) {
self->mData.clearAndFree();
return NS_ERROR_OUT_OF_MEMORY;
}
*writeCount = count;
return NS_OK;
}
NS_IMETHODIMP
nsStreamLoader::OnDataAvailable(nsIRequest* request, nsISupports *ctxt,
nsIInputStream *inStr,
uint64_t sourceOffset, uint32_t count)
{
uint32_t countRead;
nsresult rv = inStr->ReadSegments(WriteSegmentFun, this, count, &countRead);
NS_ENSURE_SUCCESS(rv, rv);
mBytesRead += countRead;
return NS_OK;
}
void
nsStreamLoader::ReleaseData()
{
mData.clearAndFree();
}
NS_IMETHODIMP
nsStreamLoader::CheckListenerChain()
{
return NS_OK;
}
} // namespace net
} // namespace mozilla
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