| /* |
| * Copyright (C) 2014 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| * THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "ContentExtensionsBackend.h" |
| |
| #if ENABLE(CONTENT_EXTENSIONS) |
| |
| #include "CompiledContentExtension.h" |
| #include "ContentExtension.h" |
| #include "ContentExtensionsDebugging.h" |
| #include "DFABytecodeInterpreter.h" |
| #include "Document.h" |
| #include "DocumentLoader.h" |
| #include "ExtensionStyleSheets.h" |
| #include "Frame.h" |
| #include "MainFrame.h" |
| #include "ResourceLoadInfo.h" |
| #include "URL.h" |
| #include "UserContentController.h" |
| #include <wtf/NeverDestroyed.h> |
| #include <wtf/text/CString.h> |
| |
| namespace WebCore { |
| |
| namespace ContentExtensions { |
| |
| void ContentExtensionsBackend::addContentExtension(const String& identifier, RefPtr<CompiledContentExtension> compiledContentExtension) |
| { |
| ASSERT(!identifier.isEmpty()); |
| if (identifier.isEmpty()) |
| return; |
| |
| if (!compiledContentExtension) { |
| removeContentExtension(identifier); |
| return; |
| } |
| |
| RefPtr<ContentExtension> extension = ContentExtension::create(identifier, adoptRef(*compiledContentExtension.leakRef())); |
| m_contentExtensions.set(identifier, WTF::move(extension)); |
| } |
| |
| void ContentExtensionsBackend::removeContentExtension(const String& identifier) |
| { |
| m_contentExtensions.remove(identifier); |
| } |
| |
| void ContentExtensionsBackend::removeAllContentExtensions() |
| { |
| m_contentExtensions.clear(); |
| } |
| |
| Vector<Action> ContentExtensionsBackend::actionsForResourceLoad(const ResourceLoadInfo& resourceLoadInfo) const |
| { |
| #if CONTENT_EXTENSIONS_PERFORMANCE_REPORTING |
| double addedTimeStart = monotonicallyIncreasingTime(); |
| #endif |
| if (resourceLoadInfo.resourceURL.protocolIsData()) |
| return Vector<Action>(); |
| |
| const String& urlString = resourceLoadInfo.resourceURL.string(); |
| ASSERT_WITH_MESSAGE(urlString.containsOnlyASCII(), "A decoded URL should only contain ASCII characters. The matching algorithm assumes the input is ASCII."); |
| const CString& urlCString = urlString.utf8(); |
| |
| Vector<Action> finalActions; |
| ResourceFlags flags = resourceLoadInfo.getResourceFlags(); |
| for (auto& contentExtension : m_contentExtensions.values()) { |
| RELEASE_ASSERT(contentExtension); |
| const CompiledContentExtension& compiledExtension = contentExtension->compiledExtension(); |
| |
| DFABytecodeInterpreter withoutDomainsInterpreter(compiledExtension.filtersWithoutDomainsBytecode(), compiledExtension.filtersWithoutDomainsBytecodeLength()); |
| DFABytecodeInterpreter::Actions withoutDomainsActions = withoutDomainsInterpreter.interpret(urlCString, flags); |
| |
| String domain = resourceLoadInfo.mainDocumentURL.host(); |
| DFABytecodeInterpreter withDomainsInterpreter(compiledExtension.filtersWithDomainsBytecode(), compiledExtension.filtersWithDomainsBytecodeLength()); |
| DFABytecodeInterpreter::Actions withDomainsActions = withDomainsInterpreter.interpretWithDomains(urlCString, flags, contentExtension->cachedDomainActions(domain)); |
| |
| const SerializedActionByte* actions = compiledExtension.actions(); |
| const unsigned actionsLength = compiledExtension.actionsLength(); |
| |
| bool sawIgnorePreviousRules = false; |
| const Vector<uint32_t>& universalWithDomains = contentExtension->universalActionsWithDomains(domain); |
| const Vector<uint32_t>& universalWithoutDomains = contentExtension->universalActionsWithoutDomains(); |
| if (!withoutDomainsActions.isEmpty() || !withDomainsActions.isEmpty() || !universalWithDomains.isEmpty() || !universalWithoutDomains.isEmpty()) { |
| Vector<uint32_t> actionLocations; |
| actionLocations.reserveInitialCapacity(withoutDomainsActions.size() + withDomainsActions.size() + universalWithoutDomains.size() + universalWithDomains.size()); |
| for (uint64_t actionLocation : withoutDomainsActions) |
| actionLocations.uncheckedAppend(static_cast<uint32_t>(actionLocation)); |
| for (uint64_t actionLocation : withDomainsActions) |
| actionLocations.uncheckedAppend(static_cast<uint32_t>(actionLocation)); |
| for (uint32_t actionLocation : universalWithoutDomains) |
| actionLocations.uncheckedAppend(actionLocation); |
| for (uint32_t actionLocation : universalWithDomains) |
| actionLocations.uncheckedAppend(actionLocation); |
| std::sort(actionLocations.begin(), actionLocations.end()); |
| |
| // Add actions in reverse order to properly deal with IgnorePreviousRules. |
| for (unsigned i = actionLocations.size(); i; i--) { |
| Action action = Action::deserialize(actions, actionsLength, actionLocations[i - 1]); |
| action.setExtensionIdentifier(contentExtension->identifier()); |
| if (action.type() == ActionType::IgnorePreviousRules) { |
| sawIgnorePreviousRules = true; |
| break; |
| } |
| finalActions.append(action); |
| } |
| } |
| if (!sawIgnorePreviousRules) { |
| finalActions.append(Action(ActionType::CSSDisplayNoneStyleSheet, contentExtension->identifier())); |
| finalActions.last().setExtensionIdentifier(contentExtension->identifier()); |
| } |
| } |
| #if CONTENT_EXTENSIONS_PERFORMANCE_REPORTING |
| double addedTimeEnd = monotonicallyIncreasingTime(); |
| dataLogF("Time added: %f microseconds %s \n", (addedTimeEnd - addedTimeStart) * 1.0e6, resourceLoadInfo.resourceURL.string().utf8().data()); |
| #endif |
| return finalActions; |
| } |
| |
| StyleSheetContents* ContentExtensionsBackend::globalDisplayNoneStyleSheet(const String& identifier) const |
| { |
| const auto& contentExtension = m_contentExtensions.get(identifier); |
| return contentExtension ? contentExtension->globalDisplayNoneStyleSheet() : nullptr; |
| } |
| |
| BlockedStatus ContentExtensionsBackend::processContentExtensionRulesForLoad(ResourceRequest& request, ResourceType resourceType, DocumentLoader& initiatingDocumentLoader) |
| { |
| Document* currentDocument = nullptr; |
| URL mainDocumentURL; |
| |
| if (Frame* frame = initiatingDocumentLoader.frame()) { |
| currentDocument = frame->document(); |
| |
| if (initiatingDocumentLoader.isLoadingMainResource() |
| && frame->isMainFrame() |
| && resourceType == ResourceType::Document) |
| mainDocumentURL = request.url(); |
| else if (Document* mainDocument = frame->mainFrame().document()) |
| mainDocumentURL = mainDocument->url(); |
| } |
| |
| ResourceLoadInfo resourceLoadInfo = { request.url(), mainDocumentURL, resourceType }; |
| Vector<ContentExtensions::Action> actions = actionsForResourceLoad(resourceLoadInfo); |
| |
| bool willBlockLoad = false; |
| for (const auto& action : actions) { |
| switch (action.type()) { |
| case ContentExtensions::ActionType::BlockLoad: |
| willBlockLoad = true; |
| break; |
| case ContentExtensions::ActionType::BlockCookies: |
| request.setAllowCookies(false); |
| break; |
| case ContentExtensions::ActionType::CSSDisplayNoneSelector: |
| if (resourceType == ResourceType::Document) |
| initiatingDocumentLoader.addPendingContentExtensionDisplayNoneSelector(action.extensionIdentifier(), action.stringArgument(), action.actionID()); |
| else if (currentDocument) |
| currentDocument->extensionStyleSheets().addDisplayNoneSelector(action.extensionIdentifier(), action.stringArgument(), action.actionID()); |
| break; |
| case ContentExtensions::ActionType::CSSDisplayNoneStyleSheet: { |
| StyleSheetContents* styleSheetContents = globalDisplayNoneStyleSheet(action.stringArgument()); |
| if (styleSheetContents) { |
| if (resourceType == ResourceType::Document) |
| initiatingDocumentLoader.addPendingContentExtensionSheet(action.stringArgument(), *styleSheetContents); |
| else if (currentDocument) |
| currentDocument->extensionStyleSheets().maybeAddContentExtensionSheet(action.stringArgument(), *styleSheetContents); |
| } |
| break; |
| } |
| case ContentExtensions::ActionType::IgnorePreviousRules: |
| case ContentExtensions::ActionType::InvalidAction: |
| RELEASE_ASSERT_NOT_REACHED(); |
| } |
| } |
| |
| if (willBlockLoad) { |
| if (currentDocument) |
| currentDocument->addConsoleMessage(MessageSource::ContentBlocker, MessageLevel::Info, makeString("Content blocker prevented frame displaying ", mainDocumentURL.string(), " from loading a resource from ", request.url().string())); |
| return BlockedStatus::Blocked; |
| } |
| return BlockedStatus::NotBlocked; |
| } |
| |
| const String& ContentExtensionsBackend::displayNoneCSSRule() |
| { |
| static NeverDestroyed<const String> rule(ASCIILiteral("display:none !important;")); |
| return rule; |
| } |
| |
| } // namespace ContentExtensions |
| |
| } // namespace WebCore |
| |
| #endif // ENABLE(CONTENT_EXTENSIONS) |
