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-rw-r--r--dom/base/nsObjectLoadingContent.cpp2247
1 files changed, 2247 insertions, 0 deletions
diff --git a/dom/base/nsObjectLoadingContent.cpp b/dom/base/nsObjectLoadingContent.cpp
new file mode 100644
index 0000000000..002d774bd1
--- /dev/null
+++ b/dom/base/nsObjectLoadingContent.cpp
@@ -0,0 +1,2247 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+/*
+ * A base class implementing nsIObjectLoadingContent for use by
+ * various content nodes that want to provide plugin/document/image
+ * loading functionality (eg <embed>, <object>, etc).
+ */
+
+// Interface headers
+#include "imgLoader.h"
+#include "nsIClassOfService.h"
+#include "nsIConsoleService.h"
+#include "nsIContent.h"
+#include "nsIContentInlines.h"
+#include "nsIDocShell.h"
+#include "mozilla/BasePrincipal.h"
+#include "mozilla/dom/BindContext.h"
+#include "mozilla/dom/Document.h"
+#include "nsIExternalProtocolHandler.h"
+#include "nsIInterfaceRequestorUtils.h"
+#include "nsIOService.h"
+#include "nsIPermissionManager.h"
+#include "nsPluginHost.h"
+#include "nsIHttpChannel.h"
+#include "nsINestedURI.h"
+#include "nsScriptSecurityManager.h"
+#include "nsIURILoader.h"
+#include "nsIURL.h"
+#include "nsIScriptChannel.h"
+#include "nsIBlocklistService.h"
+#include "nsIAsyncVerifyRedirectCallback.h"
+#include "nsIAppShell.h"
+#include "nsIXULRuntime.h"
+#include "nsIScriptError.h"
+#include "nsSubDocumentFrame.h"
+
+#include "nsError.h"
+
+// Util headers
+#include "prenv.h"
+#include "mozilla/Logging.h"
+
+#include "nsCURILoader.h"
+#include "nsContentPolicyUtils.h"
+#include "nsContentUtils.h"
+#include "nsDocShellCID.h"
+#include "nsDocShellLoadState.h"
+#include "nsGkAtoms.h"
+#include "nsThreadUtils.h"
+#include "nsNetUtil.h"
+#include "nsMimeTypes.h"
+#include "nsStyleUtil.h"
+#include "nsUnicharUtils.h"
+#include "mozilla/Preferences.h"
+#include "nsSandboxFlags.h"
+#include "nsQueryObject.h"
+
+// Concrete classes
+#include "nsFrameLoader.h"
+
+#include "nsObjectLoadingContent.h"
+#include "mozAutoDocUpdate.h"
+#include "nsWrapperCacheInlines.h"
+#include "nsDOMJSUtils.h"
+#include "js/Object.h" // JS::GetClass
+
+#include "nsWidgetsCID.h"
+#include "nsContentCID.h"
+#include "mozilla/BasicEvents.h"
+#include "mozilla/Components.h"
+#include "mozilla/LoadInfo.h"
+#include "mozilla/dom/BindingUtils.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/Event.h"
+#include "mozilla/dom/ScriptSettings.h"
+#include "mozilla/dom/PluginCrashedEvent.h"
+#include "mozilla/AsyncEventDispatcher.h"
+#include "mozilla/EventDispatcher.h"
+#include "mozilla/IMEStateManager.h"
+#include "mozilla/widget/IMEData.h"
+#include "mozilla/IntegerPrintfMacros.h"
+#include "mozilla/dom/ContentChild.h"
+#include "mozilla/dom/HTMLObjectElementBinding.h"
+#include "mozilla/dom/HTMLEmbedElement.h"
+#include "mozilla/dom/HTMLObjectElement.h"
+#include "mozilla/dom/UserActivation.h"
+#include "mozilla/dom/nsCSPContext.h"
+#include "mozilla/net/DocumentChannel.h"
+#include "mozilla/net/UrlClassifierFeatureFactory.h"
+#include "mozilla/PresShell.h"
+#include "mozilla/ProfilerLabels.h"
+#include "mozilla/StaticPrefs_browser.h"
+#include "mozilla/StaticPrefs_security.h"
+#include "nsChannelClassifier.h"
+#include "nsFocusManager.h"
+#include "ReferrerInfo.h"
+#include "nsIEffectiveTLDService.h"
+
+#ifdef XP_WIN
+// Thanks so much, Microsoft! :(
+# ifdef CreateEvent
+# undef CreateEvent
+# endif
+#endif // XP_WIN
+
+static const char kPrefYoutubeRewrite[] = "plugins.rewrite_youtube_embeds";
+
+using namespace mozilla;
+using namespace mozilla::dom;
+using namespace mozilla::net;
+
+static LogModule* GetObjectLog() {
+ static LazyLogModule sLog("objlc");
+ return sLog;
+}
+
+#define LOG(args) MOZ_LOG(GetObjectLog(), mozilla::LogLevel::Debug, args)
+#define LOG_ENABLED() MOZ_LOG_TEST(GetObjectLog(), mozilla::LogLevel::Debug)
+
+static bool IsFlashMIME(const nsACString& aMIMEType) {
+ return nsPluginHost::GetSpecialType(aMIMEType) ==
+ nsPluginHost::eSpecialType_Flash;
+}
+
+static bool IsPluginType(nsObjectLoadingContent::ObjectType type) {
+ return type == nsObjectLoadingContent::eType_Fallback ||
+ type == nsObjectLoadingContent::eType_FakePlugin;
+}
+
+///
+/// Runnables and helper classes
+///
+
+// Sets a object's mIsLoading bit to false when destroyed
+class AutoSetLoadingToFalse {
+ public:
+ explicit AutoSetLoadingToFalse(nsObjectLoadingContent* aContent)
+ : mContent(aContent) {}
+ ~AutoSetLoadingToFalse() { mContent->mIsLoading = false; }
+
+ private:
+ nsObjectLoadingContent* mContent;
+};
+
+///
+/// Helper functions
+///
+
+bool nsObjectLoadingContent::IsSuccessfulRequest(nsIRequest* aRequest,
+ nsresult* aStatus) {
+ nsresult rv = aRequest->GetStatus(aStatus);
+ if (NS_FAILED(rv) || NS_FAILED(*aStatus)) {
+ return false;
+ }
+
+ // This may still be an error page or somesuch
+ nsCOMPtr<nsIHttpChannel> httpChan(do_QueryInterface(aRequest));
+ if (httpChan) {
+ bool success;
+ rv = httpChan->GetRequestSucceeded(&success);
+ if (NS_FAILED(rv) || !success) {
+ return false;
+ }
+ }
+
+ // Otherwise, the request is successful
+ return true;
+}
+
+static bool CanHandleURI(nsIURI* aURI) {
+ nsAutoCString scheme;
+ if (NS_FAILED(aURI->GetScheme(scheme))) {
+ return false;
+ }
+
+ nsCOMPtr<nsIIOService> ios = mozilla::components::IO::Service();
+ if (!ios) {
+ return false;
+ }
+
+ nsCOMPtr<nsIProtocolHandler> handler;
+ ios->GetProtocolHandler(scheme.get(), getter_AddRefs(handler));
+ if (!handler) {
+ return false;
+ }
+
+ nsCOMPtr<nsIExternalProtocolHandler> extHandler = do_QueryInterface(handler);
+ // We can handle this URI if its protocol handler is not the external one
+ return extHandler == nullptr;
+}
+
+// Helper for tedious URI equality syntax when one or both arguments may be
+// null and URIEquals(null, null) should be true
+static bool inline URIEquals(nsIURI* a, nsIURI* b) {
+ bool equal;
+ return (!a && !b) || (a && b && NS_SUCCEEDED(a->Equals(b, &equal)) && equal);
+}
+
+///
+/// Member Functions
+///
+
+// Helper to spawn the frameloader.
+void nsObjectLoadingContent::SetupFrameLoader(int32_t aJSPluginId) {
+ nsCOMPtr<nsIContent> thisContent =
+ do_QueryInterface(static_cast<nsIImageLoadingContent*>(this));
+ NS_ASSERTION(thisContent, "must be a content");
+
+ mFrameLoader =
+ nsFrameLoader::Create(thisContent->AsElement(), mNetworkCreated);
+ MOZ_ASSERT(mFrameLoader, "nsFrameLoader::Create failed");
+}
+
+// Helper to spawn the frameloader and return a pointer to its docshell.
+already_AddRefed<nsIDocShell> nsObjectLoadingContent::SetupDocShell(
+ nsIURI* aRecursionCheckURI) {
+ SetupFrameLoader(nsFakePluginTag::NOT_JSPLUGIN);
+ if (!mFrameLoader) {
+ return nullptr;
+ }
+
+ nsCOMPtr<nsIDocShell> docShell;
+
+ if (aRecursionCheckURI) {
+ nsresult rv = mFrameLoader->CheckForRecursiveLoad(aRecursionCheckURI);
+ if (NS_SUCCEEDED(rv)) {
+ IgnoredErrorResult result;
+ docShell = mFrameLoader->GetDocShell(result);
+ if (result.Failed()) {
+ MOZ_ASSERT_UNREACHABLE("Could not get DocShell from mFrameLoader?");
+ }
+ } else {
+ LOG(("OBJLC [%p]: Aborting recursive load", this));
+ }
+ }
+
+ if (!docShell) {
+ mFrameLoader->Destroy();
+ mFrameLoader = nullptr;
+ return nullptr;
+ }
+
+ MaybeStoreCrossOriginFeaturePolicy();
+
+ return docShell.forget();
+}
+
+void nsObjectLoadingContent::UnbindFromTree(bool aNullParent) {
+ nsImageLoadingContent::UnbindFromTree(aNullParent);
+
+ if (mType != eType_Image) {
+ // nsImageLoadingContent handles the image case.
+ // Reset state and clear pending events
+ /// XXX(johns): The implementation for GenericFrame notes that ideally we
+ /// would keep the docshell around, but trash the frameloader
+ UnloadObject();
+ }
+}
+
+nsObjectLoadingContent::nsObjectLoadingContent()
+ : mType(eType_Loading),
+ mRunID(0),
+ mHasRunID(false),
+ mChannelLoaded(false),
+ mNetworkCreated(true),
+ mContentBlockingEnabled(false),
+ mSkipFakePlugins(false),
+ mIsStopping(false),
+ mIsLoading(false),
+ mScriptRequested(false),
+ mRewrittenYoutubeEmbed(false),
+ mLoadingSyntheticDocument(false) {}
+
+nsObjectLoadingContent::~nsObjectLoadingContent() {
+ // Should have been unbound from the tree at this point, and
+ // CheckPluginStopEvent keeps us alive
+ if (mFrameLoader) {
+ MOZ_ASSERT_UNREACHABLE(
+ "Should not be tearing down frame loaders at this point");
+ mFrameLoader->Destroy();
+ }
+
+ nsImageLoadingContent::Destroy();
+}
+
+void nsObjectLoadingContent::GetPluginAttributes(
+ nsTArray<MozPluginParameter>& aAttributes) {
+ aAttributes = mCachedAttributes.Clone();
+}
+
+void nsObjectLoadingContent::GetPluginParameters(
+ nsTArray<MozPluginParameter>& aParameters) {
+ aParameters = mCachedParameters.Clone();
+}
+
+void nsObjectLoadingContent::GetNestedParams(
+ nsTArray<MozPluginParameter>& aParameters) {
+ nsCOMPtr<Element> ourElement =
+ do_QueryInterface(static_cast<nsIObjectLoadingContent*>(this));
+
+ nsCOMPtr<nsIHTMLCollection> allParams;
+ constexpr auto xhtml_ns = u"http://www.w3.org/1999/xhtml"_ns;
+ ErrorResult rv;
+ allParams = ourElement->GetElementsByTagNameNS(xhtml_ns, u"param"_ns, rv);
+ if (rv.Failed()) {
+ return;
+ }
+ MOZ_ASSERT(allParams);
+
+ uint32_t numAllParams = allParams->Length();
+ for (uint32_t i = 0; i < numAllParams; i++) {
+ RefPtr<Element> element = allParams->Item(i);
+
+ nsAutoString name;
+ element->GetAttr(nsGkAtoms::name, name);
+
+ if (name.IsEmpty()) continue;
+
+ nsCOMPtr<nsIContent> parent = element->GetParent();
+ RefPtr<HTMLObjectElement> objectElement;
+ while (!objectElement && parent) {
+ objectElement = HTMLObjectElement::FromNode(parent);
+ parent = parent->GetParent();
+ }
+
+ if (objectElement) {
+ parent = objectElement;
+ } else {
+ continue;
+ }
+
+ if (parent == ourElement) {
+ MozPluginParameter param;
+ element->GetAttr(nsGkAtoms::name, param.mName);
+ element->GetAttr(nsGkAtoms::value, param.mValue);
+
+ param.mName.Trim(" \n\r\t\b", true, true, false);
+ param.mValue.Trim(" \n\r\t\b", true, true, false);
+
+ aParameters.AppendElement(param);
+ }
+ }
+}
+
+nsresult nsObjectLoadingContent::BuildParametersArray() {
+ if (mCachedAttributes.Length() || mCachedParameters.Length()) {
+ MOZ_ASSERT(false, "Parameters array should be empty.");
+ return NS_OK;
+ }
+
+ nsCOMPtr<Element> element =
+ do_QueryInterface(static_cast<nsIImageLoadingContent*>(this));
+
+ for (uint32_t i = 0; i != element->GetAttrCount(); i += 1) {
+ MozPluginParameter param;
+ const nsAttrName* attrName = element->GetAttrNameAt(i);
+ nsAtom* atom = attrName->LocalName();
+ element->GetAttr(attrName->NamespaceID(), atom, param.mValue);
+ atom->ToString(param.mName);
+ mCachedAttributes.AppendElement(param);
+ }
+
+ nsAutoCString wmodeOverride;
+ Preferences::GetCString("plugins.force.wmode", wmodeOverride);
+
+ for (uint32_t i = 0; i < mCachedAttributes.Length(); i++) {
+ if (!wmodeOverride.IsEmpty() &&
+ mCachedAttributes[i].mName.EqualsIgnoreCase("wmode")) {
+ CopyASCIItoUTF16(wmodeOverride, mCachedAttributes[i].mValue);
+ wmodeOverride.Truncate();
+ }
+ }
+
+ if (!wmodeOverride.IsEmpty()) {
+ MozPluginParameter param;
+ param.mName = u"wmode"_ns;
+ CopyASCIItoUTF16(wmodeOverride, param.mValue);
+ mCachedAttributes.AppendElement(param);
+ }
+
+ // Some plugins were never written to understand the "data" attribute of the
+ // OBJECT tag. Real and WMP will not play unless they find a "src" attribute,
+ // see bug 152334. Nav 4.x would simply replace the "data" with "src". Because
+ // some plugins correctly look for "data", lets instead copy the "data"
+ // attribute and add another entry to the bottom of the array if there isn't
+ // already a "src" specified.
+ if (element->IsHTMLElement(nsGkAtoms::object) &&
+ !element->HasAttr(kNameSpaceID_None, nsGkAtoms::src)) {
+ MozPluginParameter param;
+ element->GetAttr(kNameSpaceID_None, nsGkAtoms::data, param.mValue);
+ if (!param.mValue.IsEmpty()) {
+ param.mName = u"SRC"_ns;
+ mCachedAttributes.AppendElement(param);
+ }
+ }
+
+ GetNestedParams(mCachedParameters);
+
+ return NS_OK;
+}
+
+void nsObjectLoadingContent::NotifyOwnerDocumentActivityChanged() {
+ // XXX(johns): We cannot touch plugins or run arbitrary script from this call,
+ // as Document is in a non-reentrant state.
+
+ nsImageLoadingContent::NotifyOwnerDocumentActivityChanged();
+}
+
+// nsIRequestObserver
+NS_IMETHODIMP
+nsObjectLoadingContent::OnStartRequest(nsIRequest* aRequest) {
+ AUTO_PROFILER_LABEL("nsObjectLoadingContent::OnStartRequest", NETWORK);
+
+ LOG(("OBJLC [%p]: Channel OnStartRequest", this));
+
+ if (aRequest != mChannel || !aRequest) {
+ // happens when a new load starts before the previous one got here
+ return NS_BINDING_ABORTED;
+ }
+
+ nsCOMPtr<nsIChannel> chan(do_QueryInterface(aRequest));
+ NS_ASSERTION(chan, "Why is our request not a channel?");
+
+ nsresult status = NS_OK;
+ bool success = IsSuccessfulRequest(aRequest, &status);
+
+ // If we have already switched to type document, we're doing a
+ // process-switching DocumentChannel load. We should be able to pass down the
+ // load to our inner listener, but should also make sure to update our local
+ // state.
+ if (mType == eType_Document) {
+ if (!mFinalListener) {
+ MOZ_ASSERT_UNREACHABLE(
+ "Already are eType_Document, but don't have final listener yet?");
+ return NS_BINDING_ABORTED;
+ }
+
+ // If the load looks successful, fix up some of our local state before
+ // forwarding the request to the final URI loader.
+ //
+ // Forward load errors down to the document loader, so we don't tear down
+ // the nsDocShell ourselves.
+ if (success) {
+ LOG(("OBJLC [%p]: OnStartRequest: DocumentChannel request succeeded\n",
+ this));
+ nsCString channelType;
+ MOZ_ALWAYS_SUCCEEDS(mChannel->GetContentType(channelType));
+
+ if (GetTypeOfContent(channelType, mSkipFakePlugins) != eType_Document) {
+ MOZ_CRASH("DocumentChannel request with non-document MIME");
+ }
+ mContentType = channelType;
+
+ MOZ_ALWAYS_SUCCEEDS(
+ NS_GetFinalChannelURI(mChannel, getter_AddRefs(mURI)));
+ }
+
+ return mFinalListener->OnStartRequest(aRequest);
+ }
+
+ // Otherwise we should be state loading, and call LoadObject with the channel
+ if (mType != eType_Loading) {
+ MOZ_ASSERT_UNREACHABLE("Should be type loading at this point");
+ return NS_BINDING_ABORTED;
+ }
+ NS_ASSERTION(!mChannelLoaded, "mChannelLoaded set already?");
+ NS_ASSERTION(!mFinalListener, "mFinalListener exists already?");
+
+ mChannelLoaded = true;
+
+ if (status == NS_ERROR_BLOCKED_URI) {
+ nsCOMPtr<nsIConsoleService> console(
+ do_GetService("@mozilla.org/consoleservice;1"));
+ if (console) {
+ nsCOMPtr<nsIURI> uri;
+ chan->GetURI(getter_AddRefs(uri));
+ nsString message =
+ u"Blocking "_ns +
+ NS_ConvertASCIItoUTF16(uri->GetSpecOrDefault().get()) +
+ nsLiteralString(
+ u" since it was found on an internal Firefox blocklist.");
+ console->LogStringMessage(message.get());
+ }
+ mContentBlockingEnabled = true;
+ return NS_ERROR_FAILURE;
+ }
+
+ if (UrlClassifierFeatureFactory::IsClassifierBlockingErrorCode(status)) {
+ mContentBlockingEnabled = true;
+ return NS_ERROR_FAILURE;
+ }
+
+ if (!success) {
+ LOG(("OBJLC [%p]: OnStartRequest: Request failed\n", this));
+ // If the request fails, we still call LoadObject() to handle fallback
+ // content and notifying of failure. (mChannelLoaded && !mChannel) indicates
+ // the bad state.
+ mChannel = nullptr;
+ LoadObject(true, false);
+ return NS_ERROR_FAILURE;
+ }
+
+ return LoadObject(true, false, aRequest);
+}
+
+NS_IMETHODIMP
+nsObjectLoadingContent::OnStopRequest(nsIRequest* aRequest,
+ nsresult aStatusCode) {
+ AUTO_PROFILER_LABEL("nsObjectLoadingContent::OnStopRequest", NETWORK);
+
+ // Handle object not loading error because source was a tracking URL (or
+ // fingerprinting, cryptomining, etc.).
+ // We make a note of this object node by including it in a dedicated
+ // array of blocked tracking nodes under its parent document.
+ if (UrlClassifierFeatureFactory::IsClassifierBlockingErrorCode(aStatusCode)) {
+ nsCOMPtr<nsIContent> thisNode =
+ do_QueryInterface(static_cast<nsIObjectLoadingContent*>(this));
+ if (thisNode && thisNode->IsInComposedDoc()) {
+ thisNode->GetComposedDoc()->AddBlockedNodeByClassifier(thisNode);
+ }
+ }
+
+ if (aRequest != mChannel) {
+ return NS_BINDING_ABORTED;
+ }
+
+ mChannel = nullptr;
+
+ if (mFinalListener) {
+ // This may re-enter in the case of plugin listeners
+ nsCOMPtr<nsIStreamListener> listenerGrip(mFinalListener);
+ mFinalListener = nullptr;
+ listenerGrip->OnStopRequest(aRequest, aStatusCode);
+ }
+
+ // Return value doesn't matter
+ return NS_OK;
+}
+
+// nsIStreamListener
+NS_IMETHODIMP
+nsObjectLoadingContent::OnDataAvailable(nsIRequest* aRequest,
+ nsIInputStream* aInputStream,
+ uint64_t aOffset, uint32_t aCount) {
+ if (aRequest != mChannel) {
+ return NS_BINDING_ABORTED;
+ }
+
+ if (mFinalListener) {
+ // This may re-enter in the case of plugin listeners
+ nsCOMPtr<nsIStreamListener> listenerGrip(mFinalListener);
+ return listenerGrip->OnDataAvailable(aRequest, aInputStream, aOffset,
+ aCount);
+ }
+
+ // We shouldn't have a connected channel with no final listener
+ MOZ_ASSERT_UNREACHABLE(
+ "Got data for channel with no connected final "
+ "listener");
+ mChannel = nullptr;
+
+ return NS_ERROR_UNEXPECTED;
+}
+
+void nsObjectLoadingContent::PresetOpenerWindow(
+ const Nullable<WindowProxyHolder>& aOpenerWindow, ErrorResult& aRv) {
+ aRv.Throw(NS_ERROR_FAILURE);
+}
+
+NS_IMETHODIMP
+nsObjectLoadingContent::GetActualType(nsACString& aType) {
+ aType = mContentType;
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsObjectLoadingContent::GetDisplayedType(uint32_t* aType) {
+ *aType = DisplayedType();
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsObjectLoadingContent::GetContentTypeForMIMEType(const nsACString& aMIMEType,
+ uint32_t* aType) {
+ *aType = GetTypeOfContent(PromiseFlatCString(aMIMEType), false);
+ return NS_OK;
+}
+
+// nsIInterfaceRequestor
+// We use a shim class to implement this so that JS consumers still
+// see an interface requestor even though WebIDL bindings don't expose
+// that stuff.
+class ObjectInterfaceRequestorShim final : public nsIInterfaceRequestor,
+ public nsIChannelEventSink,
+ public nsIStreamListener {
+ public:
+ NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+ NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(ObjectInterfaceRequestorShim,
+ nsIInterfaceRequestor)
+ NS_DECL_NSIINTERFACEREQUESTOR
+ // RefPtr<nsObjectLoadingContent> fails due to ambiguous AddRef/Release,
+ // hence the ugly static cast :(
+ NS_FORWARD_NSICHANNELEVENTSINK(
+ static_cast<nsObjectLoadingContent*>(mContent.get())->)
+ NS_FORWARD_NSISTREAMLISTENER(
+ static_cast<nsObjectLoadingContent*>(mContent.get())->)
+ NS_FORWARD_NSIREQUESTOBSERVER(
+ static_cast<nsObjectLoadingContent*>(mContent.get())->)
+
+ explicit ObjectInterfaceRequestorShim(nsIObjectLoadingContent* aContent)
+ : mContent(aContent) {}
+
+ protected:
+ ~ObjectInterfaceRequestorShim() = default;
+ nsCOMPtr<nsIObjectLoadingContent> mContent;
+};
+
+NS_IMPL_CYCLE_COLLECTION(ObjectInterfaceRequestorShim, mContent)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ObjectInterfaceRequestorShim)
+ NS_INTERFACE_MAP_ENTRY(nsIInterfaceRequestor)
+ NS_INTERFACE_MAP_ENTRY(nsIChannelEventSink)
+ NS_INTERFACE_MAP_ENTRY(nsIStreamListener)
+ NS_INTERFACE_MAP_ENTRY(nsIRequestObserver)
+ NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIInterfaceRequestor)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(ObjectInterfaceRequestorShim)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(ObjectInterfaceRequestorShim)
+
+NS_IMETHODIMP
+ObjectInterfaceRequestorShim::GetInterface(const nsIID& aIID, void** aResult) {
+ if (aIID.Equals(NS_GET_IID(nsIChannelEventSink))) {
+ nsIChannelEventSink* sink = this;
+ *aResult = sink;
+ NS_ADDREF(sink);
+ return NS_OK;
+ }
+ if (aIID.Equals(NS_GET_IID(nsIObjectLoadingContent))) {
+ nsIObjectLoadingContent* olc = mContent;
+ *aResult = olc;
+ NS_ADDREF(olc);
+ return NS_OK;
+ }
+ return NS_NOINTERFACE;
+}
+
+// nsIChannelEventSink
+NS_IMETHODIMP
+nsObjectLoadingContent::AsyncOnChannelRedirect(
+ nsIChannel* aOldChannel, nsIChannel* aNewChannel, uint32_t aFlags,
+ nsIAsyncVerifyRedirectCallback* cb) {
+ // If we're already busy with a new load, or have no load at all,
+ // cancel the redirect.
+ if (!mChannel || aOldChannel != mChannel) {
+ return NS_BINDING_ABORTED;
+ }
+
+ mChannel = aNewChannel;
+
+ if (mFinalListener) {
+ nsCOMPtr<nsIChannelEventSink> sink(do_QueryInterface(mFinalListener));
+ MOZ_RELEASE_ASSERT(sink, "mFinalListener isn't nsIChannelEventSink?");
+ if (mType != eType_Document) {
+ MOZ_ASSERT_UNREACHABLE(
+ "Not a DocumentChannel load, but we're getting a "
+ "AsyncOnChannelRedirect with a mFinalListener?");
+ return NS_BINDING_ABORTED;
+ }
+
+ return sink->AsyncOnChannelRedirect(aOldChannel, aNewChannel, aFlags, cb);
+ }
+
+ cb->OnRedirectVerifyCallback(NS_OK);
+ return NS_OK;
+}
+
+// <public>
+ElementState nsObjectLoadingContent::ObjectState() const {
+ switch (mType) {
+ case eType_Loading:
+ return ElementState::LOADING;
+ case eType_Image:
+ return ImageState();
+ case eType_FakePlugin:
+ case eType_Document: {
+ // These are OK. If documents start to load successfully, they display
+ // something, and are thus not broken in this sense. The same goes for
+ // plugins.
+ ElementState states = ElementState();
+ if (mLoadingSyntheticDocument) {
+ states |= ElementState::LOADING;
+ states |= ImageState();
+ }
+ return states;
+ }
+ case eType_Fallback:
+ // This may end up handled as TYPE_NULL or as a "special" type, as
+ // chosen by the layout.use-plugin-fallback pref.
+ return ElementState();
+ case eType_Null:
+ return ElementState::BROKEN;
+ }
+ MOZ_ASSERT_UNREACHABLE("unknown type?");
+ return ElementState::LOADING;
+}
+
+void nsObjectLoadingContent::MaybeRewriteYoutubeEmbed(nsIURI* aURI,
+ nsIURI* aBaseURI,
+ nsIURI** aRewrittenURI) {
+ nsCOMPtr<nsIContent> thisContent =
+ do_QueryInterface(static_cast<nsIImageLoadingContent*>(this));
+ NS_ASSERTION(thisContent, "Must be an instance of content");
+
+ // We're only interested in switching out embed and object tags
+ if (!thisContent->NodeInfo()->Equals(nsGkAtoms::embed) &&
+ !thisContent->NodeInfo()->Equals(nsGkAtoms::object)) {
+ return;
+ }
+
+ nsCOMPtr<nsIEffectiveTLDService> tldService =
+ do_GetService(NS_EFFECTIVETLDSERVICE_CONTRACTID);
+ // If we can't analyze the URL, just pass on through.
+ if (!tldService) {
+ NS_WARNING("Could not get TLD service!");
+ return;
+ }
+
+ nsAutoCString currentBaseDomain;
+ bool ok = NS_SUCCEEDED(tldService->GetBaseDomain(aURI, 0, currentBaseDomain));
+ if (!ok) {
+ // Data URIs (commonly used for things like svg embeds) won't parse
+ // correctly, so just fail silently here.
+ return;
+ }
+
+ // See if URL is referencing youtube
+ if (!currentBaseDomain.EqualsLiteral("youtube.com") &&
+ !currentBaseDomain.EqualsLiteral("youtube-nocookie.com")) {
+ return;
+ }
+
+ // We should only rewrite URLs with paths starting with "/v/", as we shouldn't
+ // touch object nodes with "/embed/" urls that already do that right thing.
+ nsAutoCString path;
+ aURI->GetPathQueryRef(path);
+ if (!StringBeginsWith(path, "/v/"_ns)) {
+ return;
+ }
+
+ // See if requester is planning on using the JS API.
+ nsAutoCString uri;
+ nsresult rv = aURI->GetSpec(uri);
+ if (NS_FAILED(rv)) {
+ return;
+ }
+
+ // Some YouTube urls have parameters in path components, e.g.
+ // http://youtube.com/embed/7LcUOEP7Brc&start=35. These URLs work with flash,
+ // but break iframe/object embedding. If this situation occurs with rewritten
+ // URLs, convert the parameters to query in order to make the video load
+ // correctly as an iframe. In either case, warn about it in the
+ // developer console.
+ int32_t ampIndex = uri.FindChar('&', 0);
+ bool replaceQuery = false;
+ if (ampIndex != -1) {
+ int32_t qmIndex = uri.FindChar('?', 0);
+ if (qmIndex == -1 || qmIndex > ampIndex) {
+ replaceQuery = true;
+ }
+ }
+
+ // If we're pref'd off, return after telemetry has been logged.
+ if (!Preferences::GetBool(kPrefYoutubeRewrite)) {
+ return;
+ }
+
+ nsAutoString utf16OldURI = NS_ConvertUTF8toUTF16(uri);
+ // If we need to convert the URL, it means an ampersand comes first.
+ // Use the index we found earlier.
+ if (replaceQuery) {
+ // Replace question marks with ampersands.
+ uri.ReplaceChar('?', '&');
+ // Replace the first ampersand with a question mark.
+ uri.SetCharAt('?', ampIndex);
+ }
+ // Switch out video access url formats, which should possibly allow HTML5
+ // video loading.
+ uri.ReplaceSubstring("/v/"_ns, "/embed/"_ns);
+ nsAutoString utf16URI = NS_ConvertUTF8toUTF16(uri);
+ rv = nsContentUtils::NewURIWithDocumentCharset(
+ aRewrittenURI, utf16URI, thisContent->OwnerDoc(), aBaseURI);
+ if (NS_FAILED(rv)) {
+ return;
+ }
+ AutoTArray<nsString, 2> params = {utf16OldURI, utf16URI};
+ const char* msgName;
+ // If there's no query to rewrite, just notify in the developer console
+ // that we're changing the embed.
+ if (!replaceQuery) {
+ msgName = "RewriteYouTubeEmbed";
+ } else {
+ msgName = "RewriteYouTubeEmbedPathParams";
+ }
+ nsContentUtils::ReportToConsole(
+ nsIScriptError::warningFlag, "Plugins"_ns, thisContent->OwnerDoc(),
+ nsContentUtils::eDOM_PROPERTIES, msgName, params);
+}
+
+bool nsObjectLoadingContent::CheckLoadPolicy(int16_t* aContentPolicy) {
+ if (!aContentPolicy || !mURI) {
+ MOZ_ASSERT_UNREACHABLE("Doing it wrong");
+ return false;
+ }
+
+ nsCOMPtr<nsIContent> thisContent =
+ do_QueryInterface(static_cast<nsIImageLoadingContent*>(this));
+ NS_ASSERTION(thisContent, "Must be an instance of content");
+
+ Document* doc = thisContent->OwnerDoc();
+
+ nsContentPolicyType contentPolicyType = GetContentPolicyType();
+
+ nsCOMPtr<nsILoadInfo> secCheckLoadInfo = new LoadInfo(
+ doc->NodePrincipal(), // loading principal
+ doc->NodePrincipal(), // triggering principal
+ thisContent, nsILoadInfo::SEC_ONLY_FOR_EXPLICIT_CONTENTSEC_CHECK,
+ contentPolicyType);
+
+ *aContentPolicy = nsIContentPolicy::ACCEPT;
+ nsresult rv = NS_CheckContentLoadPolicy(mURI, secCheckLoadInfo, mContentType,
+ aContentPolicy,
+ nsContentUtils::GetContentPolicy());
+ NS_ENSURE_SUCCESS(rv, false);
+ if (NS_CP_REJECTED(*aContentPolicy)) {
+ LOG(("OBJLC [%p]: Content policy denied load of %s", this,
+ mURI->GetSpecOrDefault().get()));
+ return false;
+ }
+
+ return true;
+}
+
+bool nsObjectLoadingContent::CheckProcessPolicy(int16_t* aContentPolicy) {
+ if (!aContentPolicy) {
+ MOZ_ASSERT_UNREACHABLE("Null out variable");
+ return false;
+ }
+
+ nsCOMPtr<nsIContent> thisContent =
+ do_QueryInterface(static_cast<nsIImageLoadingContent*>(this));
+ NS_ASSERTION(thisContent, "Must be an instance of content");
+
+ Document* doc = thisContent->OwnerDoc();
+
+ nsContentPolicyType objectType;
+ switch (mType) {
+ case eType_Image:
+ objectType = nsIContentPolicy::TYPE_INTERNAL_IMAGE;
+ break;
+ case eType_Document:
+ objectType = nsIContentPolicy::TYPE_DOCUMENT;
+ break;
+ case eType_Fallback:
+ case eType_FakePlugin:
+ objectType = GetContentPolicyType();
+ break;
+ default:
+ MOZ_ASSERT_UNREACHABLE(
+ "Calling checkProcessPolicy with an unloadable "
+ "type");
+ return false;
+ }
+
+ nsCOMPtr<nsILoadInfo> secCheckLoadInfo = new LoadInfo(
+ doc->NodePrincipal(), // loading principal
+ doc->NodePrincipal(), // triggering principal
+ thisContent, nsILoadInfo::SEC_ONLY_FOR_EXPLICIT_CONTENTSEC_CHECK,
+ objectType);
+
+ *aContentPolicy = nsIContentPolicy::ACCEPT;
+ nsresult rv = NS_CheckContentProcessPolicy(
+ mURI ? mURI : mBaseURI, secCheckLoadInfo, mContentType, aContentPolicy,
+ nsContentUtils::GetContentPolicy());
+ NS_ENSURE_SUCCESS(rv, false);
+
+ if (NS_CP_REJECTED(*aContentPolicy)) {
+ LOG(("OBJLC [%p]: CheckContentProcessPolicy rejected load", this));
+ return false;
+ }
+
+ return true;
+}
+
+nsObjectLoadingContent::ParameterUpdateFlags
+nsObjectLoadingContent::UpdateObjectParameters() {
+ nsCOMPtr<Element> thisElement =
+ do_QueryInterface(static_cast<nsIImageLoadingContent*>(this));
+ MOZ_ASSERT(thisElement, "Must be an Element");
+
+ uint32_t caps = GetCapabilities();
+ LOG(("OBJLC [%p]: Updating object parameters", this));
+
+ nsresult rv;
+ nsAutoCString newMime;
+ nsAutoString typeAttr;
+ nsCOMPtr<nsIURI> newURI;
+ nsCOMPtr<nsIURI> newBaseURI;
+ ObjectType newType;
+ // Set if this state can't be used to load anything, forces eType_Null
+ bool stateInvalid = false;
+ // Indicates what parameters changed.
+ // eParamChannelChanged - means parameters that affect channel opening
+ // decisions changed
+ // eParamStateChanged - means anything that affects what content we load
+ // changed, even if the channel we'd open remains the
+ // same.
+ //
+ // State changes outside of the channel parameters only matter if we've
+ // already opened a channel or tried to instantiate content, whereas channel
+ // parameter changes require re-opening the channel even if we haven't gotten
+ // that far.
+ nsObjectLoadingContent::ParameterUpdateFlags retval = eParamNoChange;
+
+ ///
+ /// Initial MIME Type
+ ///
+
+ if (caps & eFallbackIfClassIDPresent) {
+ nsAutoString classIDAttr;
+ thisElement->GetAttr(kNameSpaceID_None, nsGkAtoms::classid, classIDAttr);
+ // We don't support class ID plugin references, so we should always treat
+ // having class Ids as attributes as invalid, and fallback accordingly.
+ if (!classIDAttr.IsEmpty()) {
+ newMime.Truncate();
+ stateInvalid = true;
+ }
+ }
+
+ ///
+ /// Codebase
+ ///
+
+ nsAutoString codebaseStr;
+ nsIURI* docBaseURI = thisElement->GetBaseURI();
+ thisElement->GetAttr(kNameSpaceID_None, nsGkAtoms::codebase, codebaseStr);
+
+ if (!codebaseStr.IsEmpty()) {
+ rv = nsContentUtils::NewURIWithDocumentCharset(
+ getter_AddRefs(newBaseURI), codebaseStr, thisElement->OwnerDoc(),
+ docBaseURI);
+ if (NS_FAILED(rv)) {
+ // Malformed URI
+ LOG(
+ ("OBJLC [%p]: Could not parse plugin's codebase as a URI, "
+ "will use document baseURI instead",
+ this));
+ }
+ }
+
+ // If we failed to build a valid URI, use the document's base URI
+ if (!newBaseURI) {
+ newBaseURI = docBaseURI;
+ }
+
+ nsAutoString rawTypeAttr;
+ thisElement->GetAttr(kNameSpaceID_None, nsGkAtoms::type, rawTypeAttr);
+ if (!rawTypeAttr.IsEmpty()) {
+ typeAttr = rawTypeAttr;
+ nsAutoString params;
+ nsAutoString mime;
+ nsContentUtils::SplitMimeType(rawTypeAttr, mime, params);
+ CopyUTF16toUTF8(mime, newMime);
+ }
+
+ ///
+ /// URI
+ ///
+
+ nsAutoString uriStr;
+ // Different elements keep this in various locations
+ if (thisElement->NodeInfo()->Equals(nsGkAtoms::object)) {
+ thisElement->GetAttr(kNameSpaceID_None, nsGkAtoms::data, uriStr);
+ } else if (thisElement->NodeInfo()->Equals(nsGkAtoms::embed)) {
+ thisElement->GetAttr(kNameSpaceID_None, nsGkAtoms::src, uriStr);
+ } else {
+ MOZ_ASSERT_UNREACHABLE("Unrecognized plugin-loading tag");
+ }
+
+ mRewrittenYoutubeEmbed = false;
+ // Note that the baseURI changing could affect the newURI, even if uriStr did
+ // not change.
+ if (!uriStr.IsEmpty()) {
+ rv = nsContentUtils::NewURIWithDocumentCharset(
+ getter_AddRefs(newURI), uriStr, thisElement->OwnerDoc(), newBaseURI);
+ nsCOMPtr<nsIURI> rewrittenURI;
+ MaybeRewriteYoutubeEmbed(newURI, newBaseURI, getter_AddRefs(rewrittenURI));
+ if (rewrittenURI) {
+ newURI = rewrittenURI;
+ mRewrittenYoutubeEmbed = true;
+ newMime = "text/html"_ns;
+ }
+
+ if (NS_FAILED(rv)) {
+ stateInvalid = true;
+ }
+ }
+
+ ///
+ /// Check if the original (pre-channel) content-type or URI changed, and
+ /// record mOriginal{ContentType,URI}
+ ///
+
+ if ((mOriginalContentType != newMime) || !URIEquals(mOriginalURI, newURI)) {
+ // These parameters changing requires re-opening the channel, so don't
+ // consider the currently-open channel below
+ // XXX(johns): Changing the mime type might change our decision on whether
+ // or not we load a channel, so we count changes to it as a
+ // channel parameter change for the sake of simplicity.
+ retval = (ParameterUpdateFlags)(retval | eParamChannelChanged);
+ LOG(("OBJLC [%p]: Channel parameters changed", this));
+ }
+ mOriginalContentType = newMime;
+ mOriginalURI = newURI;
+
+ ///
+ /// If we have a channel, see if its MIME type should take precendence and
+ /// check the final (redirected) URL
+ ///
+
+ // If we have a loaded channel and channel parameters did not change, use it
+ // to determine what we would load.
+ bool useChannel = mChannelLoaded && !(retval & eParamChannelChanged);
+ // If we have a channel and are type loading, as opposed to having an existing
+ // channel for a previous load.
+ bool newChannel = useChannel && mType == eType_Loading;
+
+ RefPtr<DocumentChannel> documentChannel = do_QueryObject(mChannel);
+ if (newChannel && documentChannel) {
+ // If we've got a DocumentChannel which is marked as loaded using
+ // `mChannelLoaded`, we are currently in the middle of a
+ // `UpgradeLoadToDocument`.
+ //
+ // As we don't have the real mime-type from the channel, handle this by
+ // using `newMime`.
+ newMime = TEXT_HTML;
+
+ MOZ_DIAGNOSTIC_ASSERT(
+ GetTypeOfContent(newMime, mSkipFakePlugins) == eType_Document,
+ "How is text/html not eType_Document?");
+ } else if (newChannel && mChannel) {
+ nsCString channelType;
+ rv = mChannel->GetContentType(channelType);
+ if (NS_FAILED(rv)) {
+ MOZ_ASSERT_UNREACHABLE("GetContentType failed");
+ stateInvalid = true;
+ channelType.Truncate();
+ }
+
+ LOG(("OBJLC [%p]: Channel has a content type of %s", this,
+ channelType.get()));
+
+ bool binaryChannelType = false;
+ if (channelType.EqualsASCII(APPLICATION_GUESS_FROM_EXT)) {
+ channelType = APPLICATION_OCTET_STREAM;
+ mChannel->SetContentType(channelType);
+ binaryChannelType = true;
+ } else if (channelType.EqualsASCII(APPLICATION_OCTET_STREAM) ||
+ channelType.EqualsASCII(BINARY_OCTET_STREAM)) {
+ binaryChannelType = true;
+ }
+
+ // Channel can change our URI through redirection
+ rv = NS_GetFinalChannelURI(mChannel, getter_AddRefs(newURI));
+ if (NS_FAILED(rv)) {
+ MOZ_ASSERT_UNREACHABLE("NS_GetFinalChannelURI failure");
+ stateInvalid = true;
+ }
+
+ ObjectType typeHint = newMime.IsEmpty()
+ ? eType_Null
+ : GetTypeOfContent(newMime, mSkipFakePlugins);
+
+ //
+ // In order of preference:
+ //
+ // 1) Use our type hint if it matches a plugin
+ // 2) If we have eAllowPluginSkipChannel, use the uri file extension if
+ // it matches a plugin
+ // 3) If the channel returns a binary stream type:
+ // 3a) If we have a type non-null non-document type hint, use that
+ // 3b) If the uri file extension matches a plugin type, use that
+ // 4) Use the channel type
+
+ bool overrideChannelType = false;
+ if (IsPluginType(typeHint)) {
+ LOG(("OBJLC [%p]: Using plugin type hint in favor of any channel type",
+ this));
+ overrideChannelType = true;
+ } else if (binaryChannelType && typeHint != eType_Null) {
+ if (typeHint == eType_Document) {
+ if (StaticPrefs::
+ browser_opaqueResponseBlocking_syntheticBrowsingContext_AtStartup() &&
+ imgLoader::SupportImageWithMimeType(newMime)) {
+ LOG(
+ ("OBJLC [%p]: Using type hint in favor of binary channel type "
+ "(Image Document)",
+ this));
+ overrideChannelType = true;
+ }
+ } else {
+ LOG(
+ ("OBJLC [%p]: Using type hint in favor of binary channel type "
+ "(Non-Image Document)",
+ this));
+ overrideChannelType = true;
+ }
+ }
+
+ if (overrideChannelType) {
+ // Set the type we'll use for dispatch on the channel. Otherwise we could
+ // end up trying to dispatch to a nsFrameLoader, which will complain that
+ // it couldn't find a way to handle application/octet-stream
+ nsAutoCString parsedMime, dummy;
+ NS_ParseResponseContentType(newMime, parsedMime, dummy);
+ if (!parsedMime.IsEmpty()) {
+ mChannel->SetContentType(parsedMime);
+ }
+ } else {
+ newMime = channelType;
+ }
+ } else if (newChannel) {
+ LOG(("OBJLC [%p]: We failed to open a channel, marking invalid", this));
+ stateInvalid = true;
+ }
+
+ ///
+ /// Determine final type
+ ///
+ // In order of preference:
+ // 1) If we have attempted channel load, or set stateInvalid above, the type
+ // is always null (fallback)
+ // 2) If we have a loaded channel, we grabbed its mimeType above, use that
+ // type.
+ // 3) If we have a plugin type and no URI, use that type.
+ // 4) If we have a plugin type and eAllowPluginSkipChannel, use that type.
+ // 5) if we have a URI, set type to loading to indicate we'd need a channel
+ // to proceed.
+ // 6) Otherwise, type null to indicate unloadable content (fallback)
+ //
+
+ ObjectType newMime_Type = GetTypeOfContent(newMime, mSkipFakePlugins);
+
+ if (stateInvalid) {
+ newType = eType_Null;
+ LOG(("OBJLC [%p]: NewType #0: %s - %u", this, newMime.get(), newType));
+ newMime.Truncate();
+ } else if (newChannel) {
+ // If newChannel is set above, we considered it in setting newMime
+ newType = newMime_Type;
+ LOG(("OBJLC [%p]: NewType #1: %s - %u", this, newMime.get(), newType));
+ LOG(("OBJLC [%p]: Using channel type", this));
+ } else if (((caps & eAllowPluginSkipChannel) || !newURI) &&
+ IsPluginType(newMime_Type)) {
+ newType = newMime_Type;
+ LOG(("OBJLC [%p]: NewType #2: %s - %u", this, newMime.get(), newType));
+ LOG(("OBJLC [%p]: Plugin type with no URI, skipping channel load", this));
+ } else if (newURI &&
+ (mOriginalContentType.IsEmpty() || newMime_Type != eType_Null)) {
+ // We could potentially load this if we opened a channel on mURI, indicate
+ // this by leaving type as loading.
+ //
+ // If a MIME type was requested in the tag, but we have decided to set load
+ // type to null, ignore (otherwise we'll default to document type loading).
+ newType = eType_Loading;
+ LOG(("OBJLC [%p]: NewType #3: %u", this, newType));
+ } else {
+ // Unloadable - no URI, and no plugin/MIME type. Non-plugin types (images,
+ // documents) always load with a channel.
+ newType = eType_Null;
+ LOG(("OBJLC [%p]: NewType #4: %u", this, newType));
+ }
+
+ mLoadingSyntheticDocument =
+ newType == eType_Document &&
+ StaticPrefs::
+ browser_opaqueResponseBlocking_syntheticBrowsingContext_AtStartup() &&
+ imgLoader::SupportImageWithMimeType(newMime);
+
+ ///
+ /// Handle existing channels
+ ///
+
+ if (useChannel && newType == eType_Loading) {
+ // We decided to use a channel, and also that the previous channel is still
+ // usable, so re-use the existing values.
+ newType = mType;
+ LOG(("OBJLC [%p]: NewType #5: %u", this, newType));
+ newMime = mContentType;
+ newURI = mURI;
+ } else if (useChannel && !newChannel) {
+ // We have an existing channel, but did not decide to use one.
+ retval = (ParameterUpdateFlags)(retval | eParamChannelChanged);
+ useChannel = false;
+ }
+
+ ///
+ /// Update changed values
+ ///
+
+ if (newType != mType) {
+ retval = (ParameterUpdateFlags)(retval | eParamStateChanged);
+ LOG(("OBJLC [%p]: Type changed from %u -> %u", this, mType, newType));
+ mType = newType;
+ }
+
+ if (!URIEquals(mBaseURI, newBaseURI)) {
+ LOG(("OBJLC [%p]: Object effective baseURI changed", this));
+ mBaseURI = newBaseURI;
+ }
+
+ if (!URIEquals(newURI, mURI)) {
+ retval = (ParameterUpdateFlags)(retval | eParamStateChanged);
+ LOG(("OBJLC [%p]: Object effective URI changed", this));
+ mURI = newURI;
+ }
+
+ // We don't update content type when loading, as the type is not final and we
+ // don't want to superfluously change between mOriginalContentType ->
+ // mContentType when doing |obj.data = obj.data| with a channel and differing
+ // type.
+ if (mType != eType_Loading && mContentType != newMime) {
+ retval = (ParameterUpdateFlags)(retval | eParamStateChanged);
+ retval = (ParameterUpdateFlags)(retval | eParamContentTypeChanged);
+ LOG(("OBJLC [%p]: Object effective mime type changed (%s -> %s)", this,
+ mContentType.get(), newMime.get()));
+ mContentType = newMime;
+ }
+
+ // If we decided to keep using info from an old channel, but also that state
+ // changed, we need to invalidate it.
+ if (useChannel && !newChannel && (retval & eParamStateChanged)) {
+ mType = eType_Loading;
+ retval = (ParameterUpdateFlags)(retval | eParamChannelChanged);
+ }
+
+ return retval;
+}
+
+// Used by PluginDocument to kick off our initial load from the already-opened
+// channel.
+NS_IMETHODIMP
+nsObjectLoadingContent::InitializeFromChannel(nsIRequest* aChannel) {
+ LOG(("OBJLC [%p] InitializeFromChannel: %p", this, aChannel));
+ if (mType != eType_Loading || mChannel) {
+ // We could technically call UnloadObject() here, if consumers have a valid
+ // reason for wanting to call this on an already-loaded tag.
+ MOZ_ASSERT_UNREACHABLE("Should not have begun loading at this point");
+ return NS_ERROR_UNEXPECTED;
+ }
+
+ // Because we didn't open this channel from an initial LoadObject, we'll
+ // update our parameters now, so the OnStartRequest->LoadObject doesn't
+ // believe our src/type suddenly changed.
+ UpdateObjectParameters();
+ // But we always want to load from a channel, in this case.
+ mType = eType_Loading;
+ mChannel = do_QueryInterface(aChannel);
+ NS_ASSERTION(mChannel, "passed a request that is not a channel");
+
+ // OnStartRequest will now see we have a channel in the loading state, and
+ // call into LoadObject. There's a possibility LoadObject will decide not to
+ // load anything from a channel - it will call CloseChannel() in that case.
+ return NS_OK;
+}
+
+// Only OnStartRequest should be passing the channel parameter
+nsresult nsObjectLoadingContent::LoadObject(bool aNotify, bool aForceLoad) {
+ return LoadObject(aNotify, aForceLoad, nullptr);
+}
+
+nsresult nsObjectLoadingContent::LoadObject(bool aNotify, bool aForceLoad,
+ nsIRequest* aLoadingChannel) {
+ nsCOMPtr<nsIContent> thisContent =
+ do_QueryInterface(static_cast<nsIImageLoadingContent*>(this));
+ NS_ASSERTION(thisContent, "must be a content");
+ Document* doc = thisContent->OwnerDoc();
+ nsresult rv = NS_OK;
+
+ // Per bug 1318303, if the parent document is not active, load the alternative
+ // and return.
+ if (!doc->IsCurrentActiveDocument()) {
+ // Since this can be triggered on change of attributes, make sure we've
+ // unloaded whatever is loaded first.
+ UnloadObject();
+ ObjectType oldType = mType;
+ mType = eType_Fallback;
+ ConfigureFallback();
+ NotifyStateChanged(oldType, ObjectState(), true, false);
+ return NS_OK;
+ }
+
+ // XXX(johns): In these cases, we refuse to touch our content and just
+ // remain unloaded, as per legacy behavior. It would make more sense to
+ // load fallback content initially and refuse to ever change state again.
+ if (doc->IsBeingUsedAsImage()) {
+ return NS_OK;
+ }
+
+ if (doc->IsLoadedAsData() && !doc->IsStaticDocument()) {
+ return NS_OK;
+ }
+ if (doc->IsStaticDocument()) {
+ // We only allow image loads in static documents, but we need to let the
+ // eType_Loading state go through too while we do so.
+ if (mType != eType_Image && mType != eType_Loading) {
+ return NS_OK;
+ }
+ }
+
+ LOG(("OBJLC [%p]: LoadObject called, notify %u, forceload %u, channel %p",
+ this, aNotify, aForceLoad, aLoadingChannel));
+
+ // We can't re-use an already open channel, but aForceLoad may make us try
+ // to load a plugin without any changes in channel state.
+ if (aForceLoad && mChannelLoaded) {
+ CloseChannel();
+ mChannelLoaded = false;
+ }
+
+ // Save these for NotifyStateChanged();
+ ElementState oldState = ObjectState();
+ ObjectType oldType = mType;
+
+ ParameterUpdateFlags stateChange = UpdateObjectParameters();
+
+ if (!stateChange && !aForceLoad) {
+ return NS_OK;
+ }
+
+ ///
+ /// State has changed, unload existing content and attempt to load new type
+ ///
+ LOG(("OBJLC [%p]: LoadObject - plugin state changed (%u)", this,
+ stateChange));
+
+ // We synchronously start/stop plugin instances below, which may spin the
+ // event loop. Re-entering into the load is fine, but at that point the
+ // original load call needs to abort when unwinding
+ // NOTE this is located *after* the state change check, a subsequent load
+ // with no subsequently changed state will be a no-op.
+ if (mIsLoading) {
+ LOG(("OBJLC [%p]: Re-entering into LoadObject", this));
+ }
+ mIsLoading = true;
+ AutoSetLoadingToFalse reentryCheck(this);
+
+ // Unload existing content, keeping in mind stopping plugins might spin the
+ // event loop. Note that we check for still-open channels below
+ UnloadObject(false); // Don't reset state
+ if (!mIsLoading) {
+ // The event loop must've spun and re-entered into LoadObject, which
+ // finished the load
+ LOG(("OBJLC [%p]: Re-entered into LoadObject, aborting outer load", this));
+ return NS_OK;
+ }
+
+ // Determine what's going on with our channel.
+ if (stateChange & eParamChannelChanged) {
+ // If the channel params changed, throw away the channel, but unset
+ // mChannelLoaded so we'll still try to open a new one for this load if
+ // necessary
+ CloseChannel();
+ mChannelLoaded = false;
+ } else if (mType == eType_Null && mChannel) {
+ // If we opened a channel but then failed to find a loadable state, throw it
+ // away. mChannelLoaded will indicate that we tried to load a channel at one
+ // point so we wont recurse
+ CloseChannel();
+ } else if (mType == eType_Loading && mChannel) {
+ // We're still waiting on a channel load, already opened one, and
+ // channel parameters didn't change
+ return NS_OK;
+ } else if (mChannelLoaded && mChannel != aLoadingChannel) {
+ // The only time we should have a loaded channel with a changed state is
+ // when the channel has just opened -- in which case this call should
+ // have originated from OnStartRequest
+ MOZ_ASSERT_UNREACHABLE(
+ "Loading with a channel, but state doesn't make sense");
+ return NS_OK;
+ }
+
+ //
+ // Security checks
+ //
+
+ if (mType != eType_Null && mType != eType_Fallback) {
+ bool allowLoad = true;
+ int16_t contentPolicy = nsIContentPolicy::ACCEPT;
+ // If mChannelLoaded is set we presumably already passed load policy
+ // If mType == eType_Loading then we call OpenChannel() which internally
+ // creates a new channel and calls asyncOpen() on that channel which
+ // then enforces content policy checks.
+ if (allowLoad && mURI && !mChannelLoaded && mType != eType_Loading) {
+ allowLoad = CheckLoadPolicy(&contentPolicy);
+ }
+ // If we're loading a type now, check ProcessPolicy. Note that we may check
+ // both now in the case of plugins whose type is determined before opening a
+ // channel.
+ if (allowLoad && mType != eType_Loading) {
+ allowLoad = CheckProcessPolicy(&contentPolicy);
+ }
+
+ // Content policy implementations can mutate the DOM, check for re-entry
+ if (!mIsLoading) {
+ LOG(("OBJLC [%p]: We re-entered in content policy, leaving original load",
+ this));
+ return NS_OK;
+ }
+
+ // Load denied, switch to null
+ if (!allowLoad) {
+ LOG(("OBJLC [%p]: Load denied by policy", this));
+ mType = eType_Null;
+ }
+ }
+
+ // Don't allow view-source scheme.
+ // view-source is the only scheme to which this applies at the moment due to
+ // potential timing attacks to read data from cross-origin documents. If this
+ // widens we should add a protocol flag for whether the scheme is only allowed
+ // in top and use something like nsNetUtil::NS_URIChainHasFlags.
+ if (mType != eType_Null) {
+ nsCOMPtr<nsIURI> tempURI = mURI;
+ nsCOMPtr<nsINestedURI> nestedURI = do_QueryInterface(tempURI);
+ while (nestedURI) {
+ // view-source should always be an nsINestedURI, loop and check the
+ // scheme on this and all inner URIs that are also nested URIs.
+ if (tempURI->SchemeIs("view-source")) {
+ LOG(("OBJLC [%p]: Blocking as effective URI has view-source scheme",
+ this));
+ mType = eType_Null;
+ break;
+ }
+
+ nestedURI->GetInnerURI(getter_AddRefs(tempURI));
+ nestedURI = do_QueryInterface(tempURI);
+ }
+ }
+
+ // Items resolved as Image/Document are not candidates for content blocking,
+ // as well as invalid plugins (they will not have the mContentType set).
+ if ((mType == eType_Null || IsPluginType(mType)) && ShouldBlockContent()) {
+ LOG(("OBJLC [%p]: Enable content blocking", this));
+ mType = eType_Loading;
+ }
+
+ // Sanity check: We shouldn't have any loaded resources, pending events, or
+ // a final listener at this point
+ if (mFrameLoader || mFinalListener) {
+ MOZ_ASSERT_UNREACHABLE("Trying to load new plugin with existing content");
+ return NS_OK;
+ }
+
+ // More sanity-checking:
+ // If mChannel is set, mChannelLoaded should be set, and vice-versa
+ if (mType != eType_Null && !!mChannel != mChannelLoaded) {
+ MOZ_ASSERT_UNREACHABLE("Trying to load with bad channel state");
+ return NS_OK;
+ }
+
+ ///
+ /// Attempt to load new type
+ ///
+
+ // Cache the current attributes and parameters.
+ if (mType == eType_Null) {
+ rv = BuildParametersArray();
+ NS_ENSURE_SUCCESS(rv, rv);
+ }
+
+ // We don't set mFinalListener until OnStartRequest has been called, to
+ // prevent re-entry ugliness with CloseChannel()
+ nsCOMPtr<nsIStreamListener> finalListener;
+ switch (mType) {
+ case eType_Image:
+ if (!mChannel) {
+ // We have a LoadImage() call, but UpdateObjectParameters requires a
+ // channel for images, so this is not a valid state.
+ MOZ_ASSERT_UNREACHABLE("Attempting to load image without a channel?");
+ rv = NS_ERROR_UNEXPECTED;
+ break;
+ }
+ rv = LoadImageWithChannel(mChannel, getter_AddRefs(finalListener));
+ // finalListener will receive OnStartRequest below
+ break;
+ case eType_Document: {
+ if (!mChannel) {
+ // We could mFrameLoader->LoadURI(mURI), but UpdateObjectParameters
+ // requires documents have a channel, so this is not a valid state.
+ MOZ_ASSERT_UNREACHABLE(
+ "Attempting to load a document without a "
+ "channel");
+ rv = NS_ERROR_FAILURE;
+ break;
+ }
+
+ nsCOMPtr<nsIDocShell> docShell = SetupDocShell(mURI);
+ if (!docShell) {
+ rv = NS_ERROR_FAILURE;
+ break;
+ }
+
+ // We're loading a document, so we have to set LOAD_DOCUMENT_URI
+ // (especially important for firing onload)
+ nsLoadFlags flags = 0;
+ mChannel->GetLoadFlags(&flags);
+ flags |= nsIChannel::LOAD_DOCUMENT_URI;
+ mChannel->SetLoadFlags(flags);
+
+ nsCOMPtr<nsIInterfaceRequestor> req(do_QueryInterface(docShell));
+ NS_ASSERTION(req, "Docshell must be an ifreq");
+
+ nsCOMPtr<nsIURILoader> uriLoader(components::URILoader::Service());
+ if (NS_WARN_IF(!uriLoader)) {
+ MOZ_ASSERT_UNREACHABLE("Failed to get uriLoader service");
+ mFrameLoader->Destroy();
+ mFrameLoader = nullptr;
+ break;
+ }
+
+ rv = uriLoader->OpenChannel(mChannel, nsIURILoader::DONT_RETARGET, req,
+ getter_AddRefs(finalListener));
+ // finalListener will receive OnStartRequest either below, or if
+ // `mChannel` is a `DocumentChannel`, it will be received after
+ // RedirectToRealChannel.
+ } break;
+ case eType_Loading:
+ // If our type remains Loading, we need a channel to proceed
+ rv = OpenChannel();
+ if (NS_FAILED(rv)) {
+ LOG(("OBJLC [%p]: OpenChannel returned failure (%" PRIu32 ")", this,
+ static_cast<uint32_t>(rv)));
+ }
+ break;
+ case eType_Null:
+ case eType_Fallback:
+ // Handled below, silence compiler warnings
+ break;
+ case eType_FakePlugin:
+ // We're now in the process of removing FakePlugin. See bug 1529133.
+ MOZ_CRASH(
+ "Shouldn't reach here! This means there's a fakeplugin trying to be "
+ "loaded.");
+ }
+
+ //
+ // Loaded, handle notifications and fallback
+ //
+ if (NS_FAILED(rv)) {
+ // If we failed in the loading hunk above, switch to null (empty) region
+ LOG(("OBJLC [%p]: Loading failed, switching to null", this));
+ mType = eType_Null;
+ }
+
+ // If we didn't load anything, handle switching to fallback state
+ if (mType == eType_Fallback || mType == eType_Null) {
+ LOG(("OBJLC [%p]: Switching to fallback state", this));
+ MOZ_ASSERT(!mFrameLoader, "switched to fallback but also loaded something");
+
+ MaybeFireErrorEvent();
+
+ if (mChannel) {
+ // If we were loading with a channel but then failed over, throw it away
+ CloseChannel();
+ }
+
+ // Don't try to initialize plugins or final listener below
+ finalListener = nullptr;
+
+ ConfigureFallback();
+ }
+
+ // Notify of our final state
+ NotifyStateChanged(oldType, oldState, aNotify, false);
+ NS_ENSURE_TRUE(mIsLoading, NS_OK);
+
+ //
+ // Spawning plugins and dispatching to the final listener may re-enter, so are
+ // delayed until after we fire a notification, to prevent missing
+ // notifications or firing them out of order.
+ //
+ // Note that we ensured that we entered into LoadObject() from
+ // ::OnStartRequest above when loading with a channel.
+ //
+
+ rv = NS_OK;
+ if (finalListener) {
+ NS_ASSERTION(mType != eType_Null && mType != eType_Loading,
+ "We should not have a final listener with a non-loaded type");
+ mFinalListener = finalListener;
+
+ // If we're a DocumentChannel load, hold off on firing the `OnStartRequest`
+ // callback, as we haven't received it yet from our caller.
+ RefPtr<DocumentChannel> documentChannel = do_QueryObject(mChannel);
+ if (documentChannel) {
+ MOZ_ASSERT(
+ mType == eType_Document,
+ "We have a DocumentChannel here but aren't loading a document?");
+ } else {
+ rv = finalListener->OnStartRequest(mChannel);
+ }
+ }
+
+ if ((NS_FAILED(rv) && rv != NS_ERROR_PARSED_DATA_CACHED) && mIsLoading) {
+ // Since we've already notified of our transition, we can just Unload and
+ // call ConfigureFallback (which will notify again)
+ oldType = mType;
+ mType = eType_Fallback;
+ UnloadObject(false);
+ NS_ENSURE_TRUE(mIsLoading, NS_OK);
+ CloseChannel();
+ ConfigureFallback();
+ NotifyStateChanged(oldType, ObjectState(), true, false);
+ }
+
+ return NS_OK;
+}
+
+// This call can re-enter when dealing with plugin listeners
+nsresult nsObjectLoadingContent::CloseChannel() {
+ if (mChannel) {
+ LOG(("OBJLC [%p]: Closing channel\n", this));
+ // Null the values before potentially-reentering, and ensure they survive
+ // the call
+ nsCOMPtr<nsIChannel> channelGrip(mChannel);
+ nsCOMPtr<nsIStreamListener> listenerGrip(mFinalListener);
+ mChannel = nullptr;
+ mFinalListener = nullptr;
+ channelGrip->CancelWithReason(NS_BINDING_ABORTED,
+ "nsObjectLoadingContent::CloseChannel"_ns);
+ if (listenerGrip) {
+ // mFinalListener is only set by LoadObject after OnStartRequest, or
+ // by OnStartRequest in the case of late-opened plugin streams
+ listenerGrip->OnStopRequest(channelGrip, NS_BINDING_ABORTED);
+ }
+ }
+ return NS_OK;
+}
+
+bool nsObjectLoadingContent::IsAboutBlankLoadOntoInitialAboutBlank(
+ nsIURI* aURI, bool aInheritPrincipal, nsIPrincipal* aPrincipalToInherit) {
+ return NS_IsAboutBlank(aURI) && aInheritPrincipal &&
+ (!mFrameLoader || !mFrameLoader->GetExistingDocShell() ||
+ mFrameLoader->GetExistingDocShell()
+ ->IsAboutBlankLoadOntoInitialAboutBlank(aURI, aInheritPrincipal,
+ aPrincipalToInherit));
+}
+
+nsresult nsObjectLoadingContent::OpenChannel() {
+ nsCOMPtr<nsIContent> thisContent =
+ do_QueryInterface(static_cast<nsIImageLoadingContent*>(this));
+ NS_ASSERTION(thisContent, "must be a content");
+ Document* doc = thisContent->OwnerDoc();
+ NS_ASSERTION(doc, "No owner document?");
+
+ nsresult rv;
+ mChannel = nullptr;
+
+ // E.g. mms://
+ if (!mURI || !CanHandleURI(mURI)) {
+ return NS_ERROR_NOT_AVAILABLE;
+ }
+
+ nsCOMPtr<nsILoadGroup> group = doc->GetDocumentLoadGroup();
+ nsCOMPtr<nsIChannel> chan;
+ RefPtr<ObjectInterfaceRequestorShim> shim =
+ new ObjectInterfaceRequestorShim(this);
+
+ bool inheritAttrs = nsContentUtils::ChannelShouldInheritPrincipal(
+ thisContent->NodePrincipal(), // aLoadState->PrincipalToInherit()
+ mURI, // aLoadState->URI()
+ true, // aInheritForAboutBlank
+ false); // aForceInherit
+
+ bool inheritPrincipal = inheritAttrs && !SchemeIsData(mURI);
+
+ nsSecurityFlags securityFlags =
+ nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_SEC_CONTEXT_IS_NULL;
+ if (inheritPrincipal) {
+ securityFlags |= nsILoadInfo::SEC_FORCE_INHERIT_PRINCIPAL;
+ }
+
+ nsContentPolicyType contentPolicyType = GetContentPolicyType();
+ // The setting of LOAD_BYPASS_SERVICE_WORKER here is now an optimization.
+ // ServiceWorkerInterceptController::ShouldPrepareForIntercept does a more
+ // expensive check of BrowsingContext ancestors to look for object/embed.
+ nsLoadFlags loadFlags = nsIChannel::LOAD_CALL_CONTENT_SNIFFERS |
+ nsIChannel::LOAD_BYPASS_SERVICE_WORKER |
+ nsIRequest::LOAD_HTML_OBJECT_DATA;
+ uint32_t sandboxFlags = doc->GetSandboxFlags();
+
+ // For object loads we store the CSP that potentially needs to
+ // be inherited, e.g. in case we are loading an opaque origin
+ // like a data: URI. The actual inheritance check happens within
+ // Document::InitCSP(). Please create an actual copy of the CSP
+ // (do not share the same reference) otherwise a Meta CSP of an
+ // opaque origin will incorrectly be propagated to the embedding
+ // document.
+ RefPtr<nsCSPContext> cspToInherit;
+ if (nsCOMPtr<nsIContentSecurityPolicy> csp = doc->GetCsp()) {
+ cspToInherit = new nsCSPContext();
+ cspToInherit->InitFromOther(static_cast<nsCSPContext*>(csp.get()));
+ }
+
+ // --- Create LoadInfo
+ RefPtr<LoadInfo> loadInfo = new LoadInfo(
+ /*aLoadingPrincipal = aLoadingContext->NodePrincipal() */ nullptr,
+ /*aTriggeringPrincipal = aLoadingPrincipal */ nullptr,
+ /*aLoadingContext = */ thisContent,
+ /*aSecurityFlags = */ securityFlags,
+ /*aContentPolicyType = */ contentPolicyType,
+ /*aLoadingClientInfo = */ Nothing(),
+ /*aController = */ Nothing(),
+ /*aSandboxFlags = */ sandboxFlags);
+
+ if (inheritAttrs) {
+ loadInfo->SetPrincipalToInherit(thisContent->NodePrincipal());
+ }
+
+ if (cspToInherit) {
+ loadInfo->SetCSPToInherit(cspToInherit);
+ }
+
+ if (DocumentChannel::CanUseDocumentChannel(mURI) &&
+ !IsAboutBlankLoadOntoInitialAboutBlank(mURI, inheritPrincipal,
+ thisContent->NodePrincipal())) {
+ // --- Create LoadState
+ RefPtr<nsDocShellLoadState> loadState = new nsDocShellLoadState(mURI);
+ loadState->SetPrincipalToInherit(thisContent->NodePrincipal());
+ loadState->SetTriggeringPrincipal(loadInfo->TriggeringPrincipal());
+ if (cspToInherit) {
+ loadState->SetCsp(cspToInherit);
+ }
+ loadState->SetTriggeringSandboxFlags(sandboxFlags);
+
+ // TODO(djg): This was httpChan->SetReferrerInfoWithoutClone(referrerInfo);
+ // Is the ...WithoutClone(...) important?
+ auto referrerInfo = MakeRefPtr<ReferrerInfo>(*doc);
+ loadState->SetReferrerInfo(referrerInfo);
+
+ chan =
+ DocumentChannel::CreateForObject(loadState, loadInfo, loadFlags, shim);
+ MOZ_ASSERT(chan);
+ // NS_NewChannel sets the group on the channel. CreateDocumentChannel does
+ // not.
+ chan->SetLoadGroup(group);
+ } else {
+ rv = NS_NewChannelInternal(getter_AddRefs(chan), // outChannel
+ mURI, // aUri
+ loadInfo, // aLoadInfo
+ nullptr, // aPerformanceStorage
+ group, // aLoadGroup
+ shim, // aCallbacks
+ loadFlags, // aLoadFlags
+ nullptr); // aIoService
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ if (inheritAttrs) {
+ nsCOMPtr<nsILoadInfo> loadinfo = chan->LoadInfo();
+ loadinfo->SetPrincipalToInherit(thisContent->NodePrincipal());
+ }
+
+ // For object loads we store the CSP that potentially needs to
+ // be inherited, e.g. in case we are loading an opaque origin
+ // like a data: URI. The actual inheritance check happens within
+ // Document::InitCSP(). Please create an actual copy of the CSP
+ // (do not share the same reference) otherwise a Meta CSP of an
+ // opaque origin will incorrectly be propagated to the embedding
+ // document.
+ if (cspToInherit) {
+ nsCOMPtr<nsILoadInfo> loadinfo = chan->LoadInfo();
+ static_cast<LoadInfo*>(loadinfo.get())->SetCSPToInherit(cspToInherit);
+ }
+ };
+
+ // Referrer
+ nsCOMPtr<nsIHttpChannel> httpChan(do_QueryInterface(chan));
+ if (httpChan) {
+ auto referrerInfo = MakeRefPtr<ReferrerInfo>(*doc);
+
+ rv = httpChan->SetReferrerInfoWithoutClone(referrerInfo);
+ MOZ_ASSERT(NS_SUCCEEDED(rv));
+
+ // Set the initiator type
+ nsCOMPtr<nsITimedChannel> timedChannel(do_QueryInterface(httpChan));
+ if (timedChannel) {
+ timedChannel->SetInitiatorType(thisContent->LocalName());
+ }
+
+ nsCOMPtr<nsIClassOfService> cos(do_QueryInterface(httpChan));
+ if (cos && UserActivation::IsHandlingUserInput()) {
+ cos->AddClassFlags(nsIClassOfService::UrgentStart);
+ }
+ }
+
+ nsCOMPtr<nsIScriptChannel> scriptChannel = do_QueryInterface(chan);
+ if (scriptChannel) {
+ // Allow execution against our context if the principals match
+ scriptChannel->SetExecutionPolicy(nsIScriptChannel::EXECUTE_NORMAL);
+ }
+
+ // AsyncOpen can fail if a file does not exist.
+ rv = chan->AsyncOpen(shim);
+ NS_ENSURE_SUCCESS(rv, rv);
+ LOG(("OBJLC [%p]: Channel opened", this));
+ mChannel = chan;
+ return NS_OK;
+}
+
+uint32_t nsObjectLoadingContent::GetCapabilities() const {
+ return eSupportImages | eSupportPlugins | eSupportDocuments;
+}
+
+void nsObjectLoadingContent::Destroy() {
+ if (mFrameLoader) {
+ mFrameLoader->Destroy();
+ mFrameLoader = nullptr;
+ }
+
+ // Reset state so that if the element is re-appended to tree again (e.g.
+ // adopting to another document), it will reload resource again.
+ UnloadObject();
+
+ nsImageLoadingContent::Destroy();
+}
+
+/* static */
+void nsObjectLoadingContent::Traverse(nsObjectLoadingContent* tmp,
+ nsCycleCollectionTraversalCallback& cb) {
+ NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mFrameLoader);
+}
+
+/* static */
+void nsObjectLoadingContent::Unlink(nsObjectLoadingContent* tmp) {
+ if (tmp->mFrameLoader) {
+ tmp->mFrameLoader->Destroy();
+ }
+ NS_IMPL_CYCLE_COLLECTION_UNLINK(mFrameLoader);
+}
+
+void nsObjectLoadingContent::UnloadObject(bool aResetState) {
+ // Don't notify in CancelImageRequests until we transition to a new loaded
+ // state, but not if we've loaded the image in a synthetic browsing context.
+ CancelImageRequests(false);
+ if (mFrameLoader) {
+ mFrameLoader->Destroy();
+ mFrameLoader = nullptr;
+ }
+
+ if (aResetState) {
+ CloseChannel();
+ mChannelLoaded = false;
+ mType = eType_Loading;
+ mURI = mOriginalURI = mBaseURI = nullptr;
+ mContentType.Truncate();
+ mOriginalContentType.Truncate();
+ }
+
+ mScriptRequested = false;
+
+ mIsStopping = false;
+
+ mCachedAttributes.Clear();
+ mCachedParameters.Clear();
+
+ mSubdocumentIntrinsicSize.reset();
+ mSubdocumentIntrinsicRatio.reset();
+}
+
+void nsObjectLoadingContent::NotifyStateChanged(ObjectType aOldType,
+ ElementState aOldState,
+ bool aNotify,
+ bool aForceRestyle) {
+ LOG(("OBJLC [%p]: NotifyStateChanged: (%u, %" PRIx64 ") -> (%u, %" PRIx64 ")"
+ " (notify %i)",
+ this, aOldType, aOldState.GetInternalValue(), mType,
+ ObjectState().GetInternalValue(), aNotify));
+
+ nsCOMPtr<dom::Element> thisEl = AsContent()->AsElement();
+ MOZ_ASSERT(thisEl, "must be an element");
+
+ // XXX(johns): A good bit of the code below replicates UpdateState(true)
+
+ // Unfortunately, we do some state changes without notifying
+ // (e.g. in Fallback when canceling image requests), so we have to
+ // manually notify object state changes.
+ thisEl->UpdateState(aForceRestyle);
+
+ if (!aNotify) {
+ // We're done here
+ return;
+ }
+
+ Document* doc = thisEl->GetComposedDoc();
+ if (!doc) {
+ return; // Nothing to do
+ }
+
+ const ElementState newState = ObjectState();
+ if (newState == aOldState && mType == aOldType) {
+ return; // Also done.
+ }
+
+ RefPtr<PresShell> presShell = doc->GetPresShell();
+ // If there is no PresShell or it hasn't been initialized there isn't much to
+ // do.
+ if (!presShell || !presShell->DidInitialize()) {
+ return;
+ }
+
+ if (presShell && (aOldType != mType)) {
+ presShell->PostRecreateFramesFor(thisEl);
+ }
+}
+
+nsObjectLoadingContent::ObjectType nsObjectLoadingContent::GetTypeOfContent(
+ const nsCString& aMIMEType, bool aNoFakePlugin) {
+ nsCOMPtr<nsIContent> thisContent =
+ do_QueryInterface(static_cast<nsIImageLoadingContent*>(this));
+ NS_ASSERTION(thisContent, "must be a content");
+
+ // Images, documents and (fake) plugins are always supported.
+ MOZ_ASSERT(GetCapabilities() &
+ (eSupportImages | eSupportDocuments | eSupportPlugins));
+
+ LOG(
+ ("OBJLC [%p]: calling HtmlObjectContentTypeForMIMEType: aMIMEType: %s - "
+ "thisContent: %p\n",
+ this, aMIMEType.get(), thisContent.get()));
+ auto ret =
+ static_cast<ObjectType>(nsContentUtils::HtmlObjectContentTypeForMIMEType(
+ aMIMEType, aNoFakePlugin));
+ LOG(("OBJLC [%p]: called HtmlObjectContentTypeForMIMEType\n", this));
+ return ret;
+}
+
+void nsObjectLoadingContent::CreateStaticClone(
+ nsObjectLoadingContent* aDest) const {
+ aDest->mType = mType;
+
+ if (mFrameLoader) {
+ nsCOMPtr<nsIContent> content =
+ do_QueryInterface(static_cast<nsIImageLoadingContent*>(aDest));
+ Document* doc = content->OwnerDoc();
+ if (doc->IsStaticDocument()) {
+ doc->AddPendingFrameStaticClone(aDest, mFrameLoader);
+ }
+ }
+}
+
+NS_IMETHODIMP
+nsObjectLoadingContent::GetSrcURI(nsIURI** aURI) {
+ NS_IF_ADDREF(*aURI = GetSrcURI());
+ return NS_OK;
+}
+
+void nsObjectLoadingContent::ConfigureFallback() {
+ MOZ_ASSERT(!mFrameLoader && !mChannel,
+ "ConfigureFallback called with loaded content");
+
+ // We only fallback in special cases where we are already of fallback
+ // type (e.g. removed Flash plugin use) or where something went wrong
+ // (e.g. unknown MIME type).
+ MOZ_ASSERT(mType == eType_Fallback || mType == eType_Null);
+
+ nsCOMPtr<nsIContent> thisContent =
+ do_QueryInterface(static_cast<nsIImageLoadingContent*>(this));
+ NS_ASSERTION(thisContent, "must be a content");
+
+ // There are two types of fallback:
+ // 1. HTML fallbacks are children of the <object> or <embed> DOM element.
+ // 2. The special transparent region fallback replacing Flash use.
+ // If our type is eType_Fallback (e.g. Flash use) then we use #1 if
+ // available, otherwise we use #2.
+ // If our type is eType_Null (e.g. unknown MIME type) then we use
+ // #1, otherwise the element has no size.
+ bool hasHtmlFallback = false;
+ if (thisContent->IsHTMLElement(nsGkAtoms::object)) {
+ // Do a depth-first traverse of node tree with the current element as root,
+ // looking for non-<param> elements. If we find some then we have an HTML
+ // fallback for this element.
+ for (nsIContent* child = thisContent->GetFirstChild(); child;) {
+ hasHtmlFallback =
+ hasHtmlFallback || (!child->IsHTMLElement(nsGkAtoms::param) &&
+ nsStyleUtil::IsSignificantChild(child, false));
+
+ // <object> and <embed> elements in the fallback need to StartObjectLoad.
+ // Their children should be ignored since they are part of those
+ // element's fallback.
+ if (auto embed = HTMLEmbedElement::FromNode(child)) {
+ embed->StartObjectLoad(true, true);
+ // Skip the children
+ child = child->GetNextNonChildNode(thisContent);
+ } else if (auto object = HTMLObjectElement::FromNode(child)) {
+ object->StartObjectLoad(true, true);
+ // Skip the children
+ child = child->GetNextNonChildNode(thisContent);
+ } else {
+ child = child->GetNextNode(thisContent);
+ }
+ }
+ }
+
+ // If we find an HTML fallback then we always switch type to null.
+ if (hasHtmlFallback) {
+ mType = eType_Null;
+ }
+}
+
+NS_IMETHODIMP
+nsObjectLoadingContent::Reload(bool aClearActivation) {
+ if (aClearActivation) {
+ mSkipFakePlugins = false;
+ }
+
+ return LoadObject(true, true);
+}
+
+NS_IMETHODIMP
+nsObjectLoadingContent::SkipFakePlugins() {
+ if (!nsContentUtils::IsCallerChrome()) return NS_ERROR_NOT_AVAILABLE;
+
+ mSkipFakePlugins = true;
+
+ // If we're showing a fake plugin now, reload
+ if (mType == eType_FakePlugin) {
+ return LoadObject(true, true);
+ }
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsObjectLoadingContent::UpgradeLoadToDocument(
+ nsIChannel* aRequest, BrowsingContext** aBrowsingContext) {
+ AUTO_PROFILER_LABEL("nsObjectLoadingContent::UpgradeLoadToDocument", NETWORK);
+
+ LOG(("OBJLC [%p]: UpgradeLoadToDocument", this));
+
+ if (aRequest != mChannel || !aRequest) {
+ // happens when a new load starts before the previous one got here.
+ return NS_BINDING_ABORTED;
+ }
+
+ // We should be state loading.
+ if (mType != eType_Loading) {
+ MOZ_ASSERT_UNREACHABLE("Should be type loading at this point");
+ return NS_BINDING_ABORTED;
+ }
+ MOZ_ASSERT(!mChannelLoaded, "mChannelLoaded set already?");
+ MOZ_ASSERT(!mFinalListener, "mFinalListener exists already?");
+
+ mChannelLoaded = true;
+
+ // We don't need to check for errors here, unlike in `OnStartRequest`, as
+ // `UpgradeLoadToDocument` is only called when the load is going to become a
+ // process-switching load. As we never process switch for failed object loads,
+ // we know our channel status is successful.
+
+ // Call `LoadObject` to trigger our nsObjectLoadingContext to switch into the
+ // specified new state.
+ nsresult rv = LoadObject(true, false, aRequest);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return rv;
+ }
+
+ RefPtr<BrowsingContext> bc = GetBrowsingContext();
+ if (!bc) {
+ return NS_ERROR_FAILURE;
+ }
+
+ bc.forget(aBrowsingContext);
+ return NS_OK;
+}
+
+uint32_t nsObjectLoadingContent::GetRunID(SystemCallerGuarantee,
+ ErrorResult& aRv) {
+ if (!mHasRunID) {
+ // The plugin instance must not have a run ID, so we must
+ // be running the plugin in-process.
+ aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
+ return 0;
+ }
+ return mRunID;
+}
+
+bool nsObjectLoadingContent::ShouldBlockContent() {
+ if (mContentBlockingEnabled && mURI && IsFlashMIME(mContentType) &&
+ StaticPrefs::browser_safebrowsing_blockedURIs_enabled()) {
+ return true;
+ }
+
+ return false;
+}
+
+Document* nsObjectLoadingContent::GetContentDocument(
+ nsIPrincipal& aSubjectPrincipal) {
+ nsCOMPtr<nsIContent> thisContent =
+ do_QueryInterface(static_cast<nsIImageLoadingContent*>(this));
+
+ if (!thisContent->IsInComposedDoc()) {
+ return nullptr;
+ }
+
+ Document* sub_doc = thisContent->OwnerDoc()->GetSubDocumentFor(thisContent);
+ if (!sub_doc) {
+ return nullptr;
+ }
+
+ // Return null for cross-origin contentDocument.
+ if (!aSubjectPrincipal.SubsumesConsideringDomain(sub_doc->NodePrincipal())) {
+ return nullptr;
+ }
+
+ return sub_doc;
+}
+
+bool nsObjectLoadingContent::DoResolve(
+ JSContext* aCx, JS::Handle<JSObject*> aObject, JS::Handle<jsid> aId,
+ JS::MutableHandle<mozilla::Maybe<JS::PropertyDescriptor>> aDesc) {
+ return true;
+}
+
+/* static */
+bool nsObjectLoadingContent::MayResolve(jsid aId) {
+ // We can resolve anything, really.
+ return true;
+}
+
+void nsObjectLoadingContent::GetOwnPropertyNames(
+ JSContext* aCx, JS::MutableHandleVector<jsid> /* unused */,
+ bool /* unused */, ErrorResult& aRv) {}
+
+void nsObjectLoadingContent::MaybeFireErrorEvent() {
+ nsCOMPtr<nsIContent> thisContent =
+ do_QueryInterface(static_cast<nsIImageLoadingContent*>(this));
+ // Queue a task to fire an error event if we're an <object> element. The
+ // queueing is important, since then we don't have to worry about reentry.
+ if (thisContent->IsHTMLElement(nsGkAtoms::object)) {
+ RefPtr<AsyncEventDispatcher> loadBlockingAsyncDispatcher =
+ new LoadBlockingAsyncEventDispatcher(
+ thisContent, u"error"_ns, CanBubble::eNo, ChromeOnlyDispatch::eNo);
+ loadBlockingAsyncDispatcher->PostDOMEvent();
+ }
+}
+
+bool nsObjectLoadingContent::BlockEmbedOrObjectContentLoading() {
+ nsCOMPtr<nsIContent> thisContent =
+ do_QueryInterface(static_cast<nsIImageLoadingContent*>(this));
+
+ // Traverse up the node tree to see if we have any ancestors that may block us
+ // from loading
+ for (nsIContent* parent = thisContent->GetParent(); parent;
+ parent = parent->GetParent()) {
+ if (parent->IsAnyOfHTMLElements(nsGkAtoms::video, nsGkAtoms::audio)) {
+ return true;
+ }
+ // If we have an ancestor that is an object with a source, it'll have an
+ // associated displayed type. If that type is not null, don't load content
+ // for the embed.
+ if (HTMLObjectElement* object = HTMLObjectElement::FromNode(parent)) {
+ uint32_t type = object->DisplayedType();
+ if (type != eType_Null) {
+ return true;
+ }
+ }
+ }
+ return false;
+}
+
+void nsObjectLoadingContent::SubdocumentIntrinsicSizeOrRatioChanged(
+ const Maybe<IntrinsicSize>& aIntrinsicSize,
+ const Maybe<AspectRatio>& aIntrinsicRatio) {
+ if (aIntrinsicSize == mSubdocumentIntrinsicSize &&
+ aIntrinsicRatio == mSubdocumentIntrinsicRatio) {
+ return;
+ }
+
+ mSubdocumentIntrinsicSize = aIntrinsicSize;
+ mSubdocumentIntrinsicRatio = aIntrinsicRatio;
+
+ if (nsSubDocumentFrame* sdf = do_QueryFrame(AsContent()->GetPrimaryFrame())) {
+ sdf->SubdocumentIntrinsicSizeOrRatioChanged();
+ }
+}
+
+void nsObjectLoadingContent::SubdocumentImageLoadComplete(nsresult aResult) {
+ ElementState oldState = ObjectState();
+ ObjectType oldType = mType;
+ mLoadingSyntheticDocument = false;
+
+ if (NS_FAILED(aResult)) {
+ UnloadObject();
+ mType = eType_Fallback;
+ ConfigureFallback();
+ NotifyStateChanged(oldType, oldState, true, false);
+ return;
+ }
+
+ // (mChannelLoaded && mChannel) indicates this is a good state, not any sort
+ // of failures.
+ MOZ_DIAGNOSTIC_ASSERT_IF(mChannelLoaded && mChannel, mType == eType_Document);
+
+ NotifyStateChanged(oldType, oldState, true, true);
+}
+
+void nsObjectLoadingContent::MaybeStoreCrossOriginFeaturePolicy() {
+ MOZ_DIAGNOSTIC_ASSERT(mFrameLoader);
+
+ // If the browsingContext is not ready (because docshell is dead), don't try
+ // to create one.
+ if (!mFrameLoader->IsRemoteFrame() && !mFrameLoader->GetExistingDocShell()) {
+ return;
+ }
+
+ RefPtr<BrowsingContext> browsingContext = mFrameLoader->GetBrowsingContext();
+
+ if (!browsingContext || !browsingContext->IsContentSubframe()) {
+ return;
+ }
+
+ nsCOMPtr<nsIContent> thisContent = AsContent();
+
+ if (!thisContent->IsInComposedDoc()) {
+ return;
+ }
+
+ FeaturePolicy* featurePolicy = thisContent->OwnerDoc()->FeaturePolicy();
+
+ if (ContentChild* cc = ContentChild::GetSingleton()) {
+ Unused << cc->SendSetContainerFeaturePolicy(browsingContext, featurePolicy);
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 05:19:15 +0000