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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/. */
#ifndef mozilla_places_PageIconProtocolHandler_h
#define mozilla_places_PageIconProtocolHandler_h
#include "mozilla/AlreadyAddRefed.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/MozPromise.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/net/RemoteStreamGetter.h"
#include "nsIProtocolHandler.h"
#include "nsThreadUtils.h"
#include "nsWeakReference.h"
namespace mozilla::places {
struct FaviconMetadata;
using FaviconMetadataPromise =
mozilla::MozPromise<FaviconMetadata, nsresult, false>;
using net::RemoteStreamPromise;
class PageIconProtocolHandler final : public nsIProtocolHandler,
public nsSupportsWeakReference {
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIPROTOCOLHANDLER
static already_AddRefed<PageIconProtocolHandler> GetSingleton() {
MOZ_ASSERT(NS_IsMainThread());
if (MOZ_UNLIKELY(!sSingleton)) {
sSingleton = new PageIconProtocolHandler();
ClearOnShutdown(&sSingleton);
}
return do_AddRef(sSingleton);
}
/**
* To be called in the parent process to obtain an input stream for the
* given icon.
*
* @param aChildURI a page-icon URI sent from the child.
* @param aLoadInfo the nsILoadInfo for the load attempt from the child.
* @param aTerminateSender out param set to true when the params are invalid
* and indicate the child should be terminated. If |aChildURI| is
* not a page-icon URI, the child is in an invalid state and
* should be terminated. This outparam will be set synchronously.
*
* @return RemoteStreamPromise
* The RemoteStreamPromise will resolve with an RemoteStreamInfo on
* success, and reject with an nsresult on failure.
*/
RefPtr<RemoteStreamPromise> NewStream(nsIURI* aChildURI,
nsILoadInfo* aLoadInfo,
bool* aTerminateSender);
private:
~PageIconProtocolHandler() = default;
/**
* This replaces the provided channel with a channel that will proxy the load
* to the parent process.
*
* @param aURI the page-icon: URI.
* @param aLoadInfo the loadinfo for the request.
* @param aRetVal in/out channel param referring to the channel that
* might need to be substituted with a remote channel.
* @return NS_OK if the replacement channel was created successfully.
* Otherwise, returns an error.
*/
Result<Ok, nsresult> SubstituteRemoteChannel(nsIURI* aURI,
nsILoadInfo* aLoadInfo,
nsIChannel** aRetVal);
RefPtr<FaviconMetadataPromise> GetFaviconData(nsIURI* aPageIconURI,
nsILoadInfo* aLoadInfo);
nsresult NewChannelInternal(nsIURI*, nsILoadInfo*, nsIChannel**);
void GetStreams(nsIAsyncInputStream** inStream,
nsIAsyncOutputStream** outStream);
// Gets a SimpleChannel that wraps the provided channel.
static void NewSimpleChannel(nsIURI* aURI, nsILoadInfo* aLoadinfo,
mozilla::net::RemoteStreamGetter* aStreamGetter,
nsIChannel** aRetVal);
static StaticRefPtr<PageIconProtocolHandler> sSingleton;
};
} // namespace mozilla::places
#endif
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