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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 "ImageCacheKey.h"
#include "mozilla/AntiTrackingUtils.h"
#include "mozilla/HashFunctions.h"
#include "mozilla/StorageAccess.h"
#include "mozilla/StoragePrincipalHelper.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/ServiceWorkerManager.h"
#include "mozilla/StaticPrefs_privacy.h"
#include "mozilla/StorageAccess.h"
#include "nsContentUtils.h"
#include "nsHashKeys.h"
#include "nsLayoutUtils.h"
namespace mozilla {
using namespace dom;
namespace image {
static nsIPrincipal* GetLoaderPrincipal(Document* aDocument) {
return aDocument ? aDocument->NodePrincipal()
: nsContentUtils::GetSystemPrincipal();
}
static nsIPrincipal* GetPartitionPrincipal(Document* aDocument) {
return aDocument ? aDocument->PartitionedPrincipal()
: nsContentUtils::GetSystemPrincipal();
}
ImageCacheKey::ImageCacheKey(nsIURI* aURI, CORSMode aCORSMode,
Document* aDocument)
: mURI(aURI),
mControlledDocument(GetSpecialCaseDocumentToken(aDocument)),
mLoaderPrincipal(GetLoaderPrincipal(aDocument)),
mPartitionPrincipal(GetPartitionPrincipal(aDocument)),
mCORSMode(aCORSMode),
mAppType(GetAppType(aDocument)) {
MOZ_ASSERT(mLoaderPrincipal);
MOZ_ASSERT(mPartitionPrincipal);
}
ImageCacheKey::ImageCacheKey(const ImageCacheKey& aOther) = default;
ImageCacheKey::ImageCacheKey(ImageCacheKey&& aOther) = default;
bool ImageCacheKey::operator==(const ImageCacheKey& aOther) const {
// Don't share the image cache between a controlled document and anything
// else.
if (mControlledDocument != aOther.mControlledDocument) {
return false;
}
if (!mPartitionPrincipal->Equals(aOther.mPartitionPrincipal)) {
return false;
}
if (mCORSMode != aOther.mCORSMode) {
return false;
}
// Don't share the image cache between two different appTypes
if (mAppType != aOther.mAppType) {
return false;
}
// For non-blob URIs, compare the URIs.
bool equals = false;
nsresult rv = mURI->Equals(aOther.mURI, &equals);
return NS_SUCCEEDED(rv) && equals;
}
void ImageCacheKey::EnsureHash() const {
MOZ_ASSERT(mHash.isNothing());
// NOTE(emilio): Not adding the partition principal to the hash, since it
// can mutate (see bug 1955775).
nsAutoCString spec;
(void)mURI->GetSpec(spec);
mHash.emplace(
AddToHash(HashString(spec), mControlledDocument, mAppType, mCORSMode));
}
/* static */
void* ImageCacheKey::GetSpecialCaseDocumentToken(Document* aDocument) {
// Cookie-averse documents can never have storage granted to them. Since they
// may not have inner windows, they would require special handling below, so
// just bail out early here.
if (!aDocument || aDocument->IsCookieAverse()) {
return nullptr;
}
// For controlled documents, we cast the pointer into a void* to avoid
// dereferencing it (since we only use it for comparisons).
RefPtr<ServiceWorkerManager> swm = ServiceWorkerManager::GetInstance();
if (swm && aDocument->GetController().isSome()) {
return aDocument;
}
return nullptr;
}
/* static */
nsIDocShell::AppType ImageCacheKey::GetAppType(Document* aDocument) {
if (!aDocument) {
return nsIDocShell::APP_TYPE_UNKNOWN;
}
nsCOMPtr<nsIDocShellTreeItem> dsti = aDocument->GetDocShell();
if (!dsti) {
return nsIDocShell::APP_TYPE_UNKNOWN;
}
nsCOMPtr<nsIDocShellTreeItem> root;
dsti->GetInProcessRootTreeItem(getter_AddRefs(root));
if (nsCOMPtr<nsIDocShell> docShell = do_QueryInterface(root)) {
return docShell->GetAppType();
}
return nsIDocShell::APP_TYPE_UNKNOWN;
}
} // namespace image
} // namespace mozilla
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