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-rw-r--r--netwerk/base/nsStreamLoader.cpp137
1 files changed, 137 insertions, 0 deletions
diff --git a/netwerk/base/nsStreamLoader.cpp b/netwerk/base/nsStreamLoader.cpp
new file mode 100644
index 0000000000..bd3ff25de9
--- /dev/null
+++ b/netwerk/base/nsStreamLoader.cpp
@@ -0,0 +1,137 @@
+/* -*- 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 "mozilla/ProfilerLabels.h"
+
+#include <limits>
+
+namespace mozilla {
+namespace net {
+
+nsStreamLoader::nsStreamLoader() : mData() {}
+
+NS_IMETHODIMP
+nsStreamLoader::Init(nsIStreamLoaderObserver* aStreamObserver,
+ nsIRequestObserver* aRequestObserver) {
+ NS_ENSURE_ARG_POINTER(aStreamObserver);
+ mObserver = aStreamObserver;
+ mRequestObserver = aRequestObserver;
+ return NS_OK;
+}
+
+nsresult nsStreamLoader::Create(REFNSIID aIID, void** aResult) {
+ RefPtr<nsStreamLoader> it = new nsStreamLoader();
+ return it->QueryInterface(aIID, aResult);
+}
+
+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) {
+ nsCOMPtr<nsIRequest> req = mRequest;
+ req.forget(aRequest);
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsStreamLoader::OnStartRequest(nsIRequest* request) {
+ nsCOMPtr<nsIChannel> chan(do_QueryInterface(request));
+ if (chan) {
+ int64_t contentLength = -1;
+ chan->GetContentLength(&contentLength);
+ if (contentLength >= 0) {
+ // On 64bit platforms size of uint64_t coincides with the size of size_t,
+ // so we want to compare with the minimum from size_t and int64_t.
+ if (static_cast<uint64_t>(contentLength) >
+ std::min(std::numeric_limits<size_t>::max(),
+ static_cast<size_t>(std::numeric_limits<int64_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;
+ }
+ }
+ }
+ if (mRequestObserver) {
+ mRequestObserver->OnStartRequest(request);
+ }
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsStreamLoader::OnStopRequest(nsIRequest* request, nsresult aStatus) {
+ AUTO_PROFILER_LABEL("nsStreamLoader::OnStopRequest", 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;
+ }
+
+ if (mRequestObserver) {
+ mRequestObserver->OnStopRequest(request, 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, 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