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