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CachedResourceLoader.cpp
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1668 lines (1421 loc) · 72.8 KB
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/*
Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
Copyright (C) 2004-2017 Apple Inc. All rights reserved.
Copyright (C) 2009 Torch Mobile Inc. http://www.torchmobile.com/
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
This class provides all functionality needed for loading images, style sheets and html
pages from the web. It has a memory cache for these objects.
*/
#include "config.h"
#include "CachedResourceLoader.h"
#include "CachePolicy.h"
#include "CachedCSSStyleSheet.h"
#include "CachedFont.h"
#include "CachedImage.h"
#include "CachedRawResource.h"
#include "CachedResourceRequest.h"
#include "CachedSVGDocument.h"
#include "CachedSVGFont.h"
#include "CachedScript.h"
#include "CachedTextTrack.h"
#include "CachedXSLStyleSheet.h"
#include "Chrome.h"
#include "ChromeClient.h"
#include "ContentExtensionError.h"
#include "ContentExtensionRule.h"
#include "ContentRuleListResults.h"
#include "ContentSecurityPolicy.h"
#include "CrossOriginAccessControl.h"
#include "CustomHeaderFields.h"
#include "DOMWindow.h"
#include "DateComponents.h"
#include "DiagnosticLoggingClient.h"
#include "DiagnosticLoggingKeys.h"
#include "DocumentInlines.h"
#include "DocumentLoader.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "FrameLoaderClient.h"
#include "HTMLElement.h"
#include "HTMLFrameOwnerElement.h"
#include "HTTPHeaderField.h"
#include "InspectorInstrumentation.h"
#include "LoaderStrategy.h"
#include "LocalizedStrings.h"
#include "Logging.h"
#include "MemoryCache.h"
#include "MixedContentChecker.h"
#include "Page.h"
#include "PingLoader.h"
#include "PlatformStrategies.h"
#include "RenderElement.h"
#include "ResourceLoadInfo.h"
#include "ResourceTiming.h"
#include "RuntimeApplicationChecks.h"
#include "SVGElementTypeHelpers.h"
#include "SVGImage.h"
#include "ScriptController.h"
#include "SecurityOrigin.h"
#include "SecurityPolicy.h"
#include "ServiceWorker.h"
#include "Settings.h"
#include "StyleSheetContents.h"
#include "SubresourceLoader.h"
#include "UserContentController.h"
#include "UserStyleSheet.h"
#include <pal/SessionID.h>
#include <wtf/text/CString.h>
#include <wtf/text/WTFString.h>
#if ENABLE(APPLICATION_MANIFEST)
#include "CachedApplicationManifest.h"
#endif
#if PLATFORM(IOS_FAMILY)
#include "Device.h"
#endif
#undef CACHEDRESOURCELOADER_RELEASE_LOG
#define PAGE_ID(frame) (valueOrDefault(frame.pageID()).toUInt64())
#define FRAME_ID(frame) (valueOrDefault(frame.frameID()).toUInt64())
#define CACHEDRESOURCELOADER_RELEASE_LOG(fmt, ...) RELEASE_LOG(Network, "%p - CachedResourceLoader::" fmt, this, ##__VA_ARGS__)
#define CACHEDRESOURCELOADER_RELEASE_LOG_WITH_FRAME(fmt, frame, ...) RELEASE_LOG(Network, "%p - [pageID=%" PRIu64 ", frameID=%" PRIu64 "] CachedResourceLoader::" fmt, this, PAGE_ID(frame), FRAME_ID(frame), ##__VA_ARGS__)
namespace WebCore {
// Timeout for link preloads to be used after window.onload
static const Seconds unusedPreloadTimeout { 3_s };
template <typename T, typename U>
static inline ResourceErrorOr<CachedResourceHandle<T>> castCachedResourceTo(ResourceErrorOr<CachedResourceHandle<U>>&& cachedResource)
{
if (cachedResource)
return CachedResourceHandle<T> { static_cast<T*>(cachedResource.value().get()) };
return makeUnexpected(cachedResource.error());
}
static CachedResourceHandle<CachedResource> createResource(CachedResource::Type type, CachedResourceRequest&& request, PAL::SessionID sessionID, const CookieJar* cookieJar, const Settings& settings)
{
switch (type) {
case CachedResource::Type::ImageResource:
return new CachedImage(WTFMove(request), sessionID, cookieJar);
case CachedResource::Type::CSSStyleSheet:
return new CachedCSSStyleSheet(WTFMove(request), sessionID, cookieJar);
case CachedResource::Type::Script:
return new CachedScript(WTFMove(request), sessionID, cookieJar);
case CachedResource::Type::SVGDocumentResource:
return new CachedSVGDocument(WTFMove(request), sessionID, cookieJar, settings);
case CachedResource::Type::SVGFontResource:
return new CachedSVGFont(WTFMove(request), sessionID, cookieJar, settings);
case CachedResource::Type::FontResource:
return new CachedFont(WTFMove(request), sessionID, cookieJar);
case CachedResource::Type::Beacon:
case CachedResource::Type::Ping:
case CachedResource::Type::MediaResource:
#if ENABLE(MODEL_ELEMENT)
case CachedResource::Type::ModelResource:
#endif
case CachedResource::Type::RawResource:
case CachedResource::Type::Icon:
case CachedResource::Type::MainResource:
return new CachedRawResource(WTFMove(request), type, sessionID, cookieJar);
#if ENABLE(XSLT)
case CachedResource::Type::XSLStyleSheet:
return new CachedXSLStyleSheet(WTFMove(request), sessionID, cookieJar);
#endif
case CachedResource::Type::LinkPrefetch:
return new CachedResource(WTFMove(request), CachedResource::Type::LinkPrefetch, sessionID, cookieJar);
case CachedResource::Type::TextTrackResource:
return new CachedTextTrack(WTFMove(request), sessionID, cookieJar);
#if ENABLE(APPLICATION_MANIFEST)
case CachedResource::Type::ApplicationManifest:
return new CachedApplicationManifest(WTFMove(request), sessionID, cookieJar);
#endif
}
ASSERT_NOT_REACHED();
return nullptr;
}
static CachedResourceHandle<CachedResource> createResource(CachedResourceRequest&& request, CachedResource& resource)
{
switch (resource.type()) {
case CachedResource::Type::ImageResource:
return new CachedImage(WTFMove(request), resource.sessionID(), resource.cookieJar());
case CachedResource::Type::CSSStyleSheet:
return new CachedCSSStyleSheet(WTFMove(request), resource.sessionID(), resource.cookieJar());
case CachedResource::Type::Script:
return new CachedScript(WTFMove(request), resource.sessionID(), resource.cookieJar());
case CachedResource::Type::SVGDocumentResource:
return new CachedSVGDocument(WTFMove(request), downcast<CachedSVGDocument>(resource));
case CachedResource::Type::SVGFontResource:
return new CachedSVGFont(WTFMove(request), downcast<CachedSVGFont>(resource));
case CachedResource::Type::FontResource:
return new CachedFont(WTFMove(request), resource.sessionID(), resource.cookieJar());
case CachedResource::Type::Beacon:
case CachedResource::Type::Ping:
case CachedResource::Type::MediaResource:
case CachedResource::Type::RawResource:
case CachedResource::Type::Icon:
case CachedResource::Type::MainResource:
#if ENABLE(MODEL_ELEMENT)
case CachedResource::Type::ModelResource:
#endif
return new CachedRawResource(WTFMove(request), resource.type(), resource.sessionID(), resource.cookieJar());
#if ENABLE(XSLT)
case CachedResource::Type::XSLStyleSheet:
return new CachedXSLStyleSheet(WTFMove(request), resource.sessionID(), resource.cookieJar());
#endif
case CachedResource::Type::LinkPrefetch:
return new CachedResource(WTFMove(request), CachedResource::Type::LinkPrefetch, resource.sessionID(), resource.cookieJar());
case CachedResource::Type::TextTrackResource:
return new CachedTextTrack(WTFMove(request), resource.sessionID(), resource.cookieJar());
#if ENABLE(APPLICATION_MANIFEST)
case CachedResource::Type::ApplicationManifest:
return new CachedApplicationManifest(WTFMove(request), resource.sessionID(), resource.cookieJar());
#endif
}
ASSERT_NOT_REACHED();
return nullptr;
}
CachedResourceLoader::CachedResourceLoader(DocumentLoader* documentLoader)
: m_documentLoader(documentLoader)
, m_unusedPreloadsTimer(*this, &CachedResourceLoader::warnUnusedPreloads)
, m_garbageCollectDocumentResourcesTimer(*this, &CachedResourceLoader::garbageCollectDocumentResources)
{
}
CachedResourceLoader::~CachedResourceLoader()
{
m_documentLoader = nullptr;
m_document = nullptr;
clearPreloads(ClearPreloadsMode::ClearAllPreloads);
// Make sure no requests still point to this CachedResourceLoader
ASSERT(m_requestCount == 0);
m_unusedPreloadsTimer.stop();
}
CachedResource* CachedResourceLoader::cachedResource(const String& resourceURL) const
{
ASSERT(!resourceURL.isNull());
return cachedResource(MemoryCache::removeFragmentIdentifierIfNeeded(m_document->completeURL(resourceURL)));
}
CachedResource* CachedResourceLoader::cachedResource(const URL& url) const
{
ASSERT(!MemoryCache::shouldRemoveFragmentIdentifier(url));
return m_documentResources.get(url.string()).get();
}
Frame* CachedResourceLoader::frame() const
{
return m_documentLoader ? m_documentLoader->frame() : nullptr;
}
ResourceErrorOr<CachedResourceHandle<CachedImage>> CachedResourceLoader::requestImage(CachedResourceRequest&& request, ImageLoading imageLoading)
{
if (Frame* frame = this->frame()) {
if (frame->loader().pageDismissalEventBeingDispatched() != FrameLoader::PageDismissalType::None) {
if (Document* document = frame->document())
request.upgradeInsecureRequestIfNeeded(*document);
URL requestURL = request.resourceRequest().url();
if (requestURL.isValid() && canRequest(CachedResource::Type::ImageResource, requestURL, request.options(), ForPreload::No))
PingLoader::loadImage(*frame, requestURL);
return CachedResourceHandle<CachedImage> { };
}
}
if (imageLoading == ImageLoading::Immediate)
imageLoading = clientDefersImage(request.resourceRequest().url());
return castCachedResourceTo<CachedImage>(requestResource(CachedResource::Type::ImageResource, WTFMove(request), ForPreload::No, imageLoading));
}
ResourceErrorOr<CachedResourceHandle<CachedFont>> CachedResourceLoader::requestFont(CachedResourceRequest&& request, bool isSVG)
{
if (isSVG)
return castCachedResourceTo<CachedFont>(requestResource(CachedResource::Type::SVGFontResource, WTFMove(request)));
return castCachedResourceTo<CachedFont>(requestResource(CachedResource::Type::FontResource, WTFMove(request)));
}
#if ENABLE(VIDEO)
ResourceErrorOr<CachedResourceHandle<CachedTextTrack>> CachedResourceLoader::requestTextTrack(CachedResourceRequest&& request)
{
return castCachedResourceTo<CachedTextTrack>(requestResource(CachedResource::Type::TextTrackResource, WTFMove(request)));
}
#endif
ResourceErrorOr<CachedResourceHandle<CachedCSSStyleSheet>> CachedResourceLoader::requestCSSStyleSheet(CachedResourceRequest&& request)
{
return castCachedResourceTo<CachedCSSStyleSheet>(requestResource(CachedResource::Type::CSSStyleSheet, WTFMove(request)));
}
CachedResourceHandle<CachedCSSStyleSheet> CachedResourceLoader::requestUserCSSStyleSheet(Page& page, CachedResourceRequest&& request)
{
request.setDestinationIfNotSet(FetchOptions::Destination::Style);
ASSERT(document());
request.setDomainForCachePartition(*document());
auto& memoryCache = MemoryCache::singleton();
if (request.allowsCaching()) {
if (CachedResource* existing = memoryCache.resourceForRequest(request.resourceRequest(), page.sessionID())) {
if (is<CachedCSSStyleSheet>(*existing))
return downcast<CachedCSSStyleSheet>(existing);
memoryCache.remove(*existing);
}
}
request.removeFragmentIdentifierIfNeeded();
CachedResourceHandle<CachedCSSStyleSheet> userSheet = new CachedCSSStyleSheet(WTFMove(request), page.sessionID(), &page.cookieJar());
if (userSheet->allowsCaching())
memoryCache.add(*userSheet);
userSheet->load(*this);
return userSheet;
}
ResourceErrorOr<CachedResourceHandle<CachedScript>> CachedResourceLoader::requestScript(CachedResourceRequest&& request)
{
return castCachedResourceTo<CachedScript>(requestResource(CachedResource::Type::Script, WTFMove(request)));
}
#if ENABLE(XSLT)
ResourceErrorOr<CachedResourceHandle<CachedXSLStyleSheet>> CachedResourceLoader::requestXSLStyleSheet(CachedResourceRequest&& request)
{
return castCachedResourceTo<CachedXSLStyleSheet>(requestResource(CachedResource::Type::XSLStyleSheet, WTFMove(request)));
}
#endif
ResourceErrorOr<CachedResourceHandle<CachedSVGDocument>> CachedResourceLoader::requestSVGDocument(CachedResourceRequest&& request)
{
return castCachedResourceTo<CachedSVGDocument>(requestResource(CachedResource::Type::SVGDocumentResource, WTFMove(request)));
}
ResourceErrorOr<CachedResourceHandle<CachedResource>> CachedResourceLoader::requestLinkResource(CachedResource::Type type, CachedResourceRequest&& request)
{
ASSERT(frame());
ASSERT(type == CachedResource::Type::LinkPrefetch);
return requestResource(type, WTFMove(request));
}
ResourceErrorOr<CachedResourceHandle<CachedRawResource>> CachedResourceLoader::requestMedia(CachedResourceRequest&& request)
{
auto resourceType = CachedResource::Type::MediaResource;
switch (request.options().destination) {
case FetchOptions::Destination::Audio:
case FetchOptions::Destination::Video:
break;
case FetchOptions::Destination::Model:
#if ENABLE(MODEL_ELEMENT)
resourceType = CachedResource::Type::ModelResource;
break;
#endif
default:
ASSERT_NOT_REACHED();
}
return castCachedResourceTo<CachedRawResource>(requestResource(resourceType, WTFMove(request)));
}
ResourceErrorOr<CachedResourceHandle<CachedRawResource>> CachedResourceLoader::requestIcon(CachedResourceRequest&& request)
{
return castCachedResourceTo<CachedRawResource>(requestResource(CachedResource::Type::Icon, WTFMove(request)));
}
ResourceErrorOr<CachedResourceHandle<CachedRawResource>> CachedResourceLoader::requestRawResource(CachedResourceRequest&& request)
{
return castCachedResourceTo<CachedRawResource>(requestResource(CachedResource::Type::RawResource, WTFMove(request)));
}
ResourceErrorOr<CachedResourceHandle<CachedRawResource>> CachedResourceLoader::requestBeaconResource(CachedResourceRequest&& request)
{
ASSERT(request.options().destination == FetchOptions::Destination::EmptyString);
return castCachedResourceTo<CachedRawResource>(requestResource(CachedResource::Type::Beacon, WTFMove(request)));
}
ResourceErrorOr<CachedResourceHandle<CachedRawResource>> CachedResourceLoader::requestPingResource(CachedResourceRequest&& request)
{
ASSERT(request.options().destination == FetchOptions::Destination::EmptyString || request.options().destination == FetchOptions::Destination::Report);
return castCachedResourceTo<CachedRawResource>(requestResource(CachedResource::Type::Ping, WTFMove(request)));
}
ResourceErrorOr<CachedResourceHandle<CachedRawResource>> CachedResourceLoader::requestMainResource(CachedResourceRequest&& request)
{
return castCachedResourceTo<CachedRawResource>(requestResource(CachedResource::Type::MainResource, WTFMove(request)));
}
#if ENABLE(APPLICATION_MANIFEST)
ResourceErrorOr<CachedResourceHandle<CachedApplicationManifest>> CachedResourceLoader::requestApplicationManifest(CachedResourceRequest&& request)
{
return castCachedResourceTo<CachedApplicationManifest>(requestResource(CachedResource::Type::ApplicationManifest, WTFMove(request)));
}
#endif // ENABLE(APPLICATION_MANIFEST)
#if ENABLE(MODEL_ELEMENT)
ResourceErrorOr<CachedResourceHandle<CachedRawResource>> CachedResourceLoader::requestModelResource(CachedResourceRequest&& request)
{
return castCachedResourceTo<CachedRawResource>(requestResource(CachedResource::Type::ModelResource, WTFMove(request)));
}
#endif
static MixedContentChecker::ContentType contentTypeFromResourceType(CachedResource::Type type)
{
switch (type) {
// https://w3c.github.io/webappsec-mixed-content/#category-optionally-blockable
// Editor's Draft, 11 February 2016
// 3.1. Optionally-blockable Content
case CachedResource::Type::ImageResource:
case CachedResource::Type::MediaResource:
#if ENABLE(MODEL_ELEMENT)
case CachedResource::Type::ModelResource:
#endif
return MixedContentChecker::ContentType::ActiveCanWarn;
case CachedResource::Type::CSSStyleSheet:
case CachedResource::Type::Script:
case CachedResource::Type::FontResource:
return MixedContentChecker::ContentType::Active;
case CachedResource::Type::SVGFontResource:
return MixedContentChecker::ContentType::Active;
case CachedResource::Type::Beacon:
case CachedResource::Type::Ping:
case CachedResource::Type::RawResource:
case CachedResource::Type::Icon:
case CachedResource::Type::SVGDocumentResource:
return MixedContentChecker::ContentType::Active;
#if ENABLE(XSLT)
case CachedResource::Type::XSLStyleSheet:
return MixedContentChecker::ContentType::Active;
#endif
case CachedResource::Type::LinkPrefetch:
return MixedContentChecker::ContentType::Active;
#if ENABLE(VIDEO)
case CachedResource::Type::TextTrackResource:
return MixedContentChecker::ContentType::Active;
#endif
#if ENABLE(APPLICATION_MANIFEST)
case CachedResource::Type::ApplicationManifest:
return MixedContentChecker::ContentType::Active;
#endif
default:
ASSERT_NOT_REACHED();
return MixedContentChecker::ContentType::Active;
}
}
bool CachedResourceLoader::checkInsecureContent(CachedResource::Type type, const URL& url) const
{
if (!canRequestInContentDispositionAttachmentSandbox(type, url))
return false;
switch (type) {
case CachedResource::Type::Script:
#if ENABLE(XSLT)
case CachedResource::Type::XSLStyleSheet:
#endif
case CachedResource::Type::SVGDocumentResource:
case CachedResource::Type::CSSStyleSheet:
// These resource can inject script into the current document (Script,
// XSL) or exfiltrate the content of the current document (CSS).
if (Frame* frame = this->frame()) {
if (!MixedContentChecker::canRunInsecureContent(*frame, m_document->securityOrigin(), url))
return false;
Frame& top = frame->tree().top();
if (&top != frame && !MixedContentChecker::canRunInsecureContent(top, top.document()->securityOrigin(), url))
return false;
}
break;
#if ENABLE(VIDEO)
case CachedResource::Type::TextTrackResource:
#endif
#if ENABLE(MODEL_ELEMENT)
case CachedResource::Type::ModelResource:
#endif
case CachedResource::Type::MediaResource:
case CachedResource::Type::RawResource:
case CachedResource::Type::Icon:
case CachedResource::Type::ImageResource:
case CachedResource::Type::SVGFontResource:
case CachedResource::Type::FontResource: {
// These resources can corrupt only the frame's pixels.
if (Frame* frame = this->frame()) {
if (!MixedContentChecker::canDisplayInsecureContent(*frame, m_document->securityOrigin(), contentTypeFromResourceType(type), url, MixedContentChecker::AlwaysDisplayInNonStrictMode::Yes))
return false;
Frame& topFrame = frame->tree().top();
if (!MixedContentChecker::canDisplayInsecureContent(topFrame, topFrame.document()->securityOrigin(), contentTypeFromResourceType(type), url))
return false;
}
break;
}
case CachedResource::Type::MainResource:
case CachedResource::Type::Beacon:
case CachedResource::Type::Ping:
case CachedResource::Type::LinkPrefetch:
// Prefetch cannot affect the current document.
#if ENABLE(APPLICATION_MANIFEST)
case CachedResource::Type::ApplicationManifest:
#endif
break;
}
return true;
}
bool CachedResourceLoader::allowedByContentSecurityPolicy(CachedResource::Type type, const URL& url, const ResourceLoaderOptions& options, ContentSecurityPolicy::RedirectResponseReceived redirectResponseReceived, const URL& preRedirectURL) const
{
if (options.contentSecurityPolicyImposition == ContentSecurityPolicyImposition::SkipPolicyCheck)
return true;
ASSERT(m_document);
ASSERT(m_document->contentSecurityPolicy());
// All content loaded through embed or object elements goes through object-src: https://www.w3.org/TR/CSP3/#directive-object-src.
if (options.loadedFromPluginElement == LoadedFromPluginElement::Yes
&& !m_document->contentSecurityPolicy()->allowObjectFromSource(url, redirectResponseReceived, preRedirectURL))
return false;
switch (type) {
#if ENABLE(XSLT)
case CachedResource::Type::XSLStyleSheet:
#endif
case CachedResource::Type::Script:
if (!m_document->contentSecurityPolicy()->allowScriptFromSource(url, redirectResponseReceived, preRedirectURL, options.integrity, options.nonce))
return false;
break;
case CachedResource::Type::CSSStyleSheet:
if (!m_document->contentSecurityPolicy()->allowStyleFromSource(url, redirectResponseReceived, preRedirectURL, options.nonce))
return false;
break;
case CachedResource::Type::SVGDocumentResource:
case CachedResource::Type::Icon:
case CachedResource::Type::ImageResource:
if (!m_document->contentSecurityPolicy()->allowImageFromSource(url, redirectResponseReceived, preRedirectURL))
return false;
break;
case CachedResource::Type::SVGFontResource:
case CachedResource::Type::FontResource:
if (!m_document->contentSecurityPolicy()->allowFontFromSource(url, redirectResponseReceived, preRedirectURL))
return false;
break;
case CachedResource::Type::MediaResource:
#if ENABLE(VIDEO)
case CachedResource::Type::TextTrackResource:
#endif
if (!m_document->contentSecurityPolicy()->allowMediaFromSource(url, redirectResponseReceived, preRedirectURL))
return false;
break;
case CachedResource::Type::Beacon:
case CachedResource::Type::Ping:
case CachedResource::Type::RawResource:
#if ENABLE(MODEL_ELEMENT)
case CachedResource::Type::ModelResource:
#endif
return true;
#if ENABLE(APPLICATION_MANIFEST)
case CachedResource::Type::ApplicationManifest:
if (!m_document->contentSecurityPolicy()->allowManifestFromSource(url, redirectResponseReceived, preRedirectURL))
return false;
break;
#endif
default:
ASSERT_NOT_REACHED();
}
return true;
}
static inline bool isSameOriginDataURL(const URL& url, const ResourceLoaderOptions& options)
{
// FIXME: Remove same-origin data URL flag since it was removed from fetch spec (https://github.com/whatwg/fetch/issues/381).
return url.protocolIsData() && options.sameOriginDataURLFlag == SameOriginDataURLFlag::Set;
}
// Security checks defined in https://fetch.spec.whatwg.org/#main-fetch step 2 and 4.
bool CachedResourceLoader::canRequest(CachedResource::Type type, const URL& url, const ResourceLoaderOptions& options, ForPreload forPreload)
{
if (document() && !document()->securityOrigin().canDisplay(url)) {
if (forPreload == ForPreload::No)
FrameLoader::reportLocalLoadFailed(frame(), url.stringCenterEllipsizedToLength());
LOG(ResourceLoading, "CachedResourceLoader::requestResource URL was not allowed by SecurityOrigin::canDisplay");
return false;
}
if (options.mode == FetchOptions::Mode::SameOrigin && !m_document->securityOrigin().canRequest(url) && !isSameOriginDataURL(url, options)) {
printAccessDeniedMessage(url);
return false;
}
if (options.mode == FetchOptions::Mode::NoCors && !m_document->securityOrigin().canRequest(url) && options.redirect != FetchOptions::Redirect::Follow && type != CachedResource::Type::Ping) {
ASSERT(type != CachedResource::Type::MainResource);
frame()->document()->addConsoleMessage(MessageSource::Security, MessageLevel::Error, "No-Cors mode requires follow redirect mode"_s);
return false;
}
if (!allowedByContentSecurityPolicy(type, url, options, ContentSecurityPolicy::RedirectResponseReceived::No))
return false;
// SVG Images have unique security rules that prevent all subresource requests except for data urls.
if (type != CachedResource::Type::MainResource && frame() && frame()->page()) {
if (frame()->page()->chrome().client().isSVGImageChromeClient() && !url.protocolIsData())
return false;
}
// Last of all, check for insecure content. We do this last so that when folks block insecure content with a CSP policy, they don't get a warning.
// They'll still get a warning in the console about CSP blocking the load.
// FIXME: Should we consider whether the request is for preload here?
if (!checkInsecureContent(type, url))
return false;
return true;
}
// FIXME: Should we find a way to know whether the redirection is for a preload request like we do for CachedResourceLoader::canRequest?
bool CachedResourceLoader::canRequestAfterRedirection(CachedResource::Type type, const URL& url, const ResourceLoaderOptions& options, const URL& preRedirectURL) const
{
if (document() && !document()->securityOrigin().canDisplay(url)) {
FrameLoader::reportLocalLoadFailed(frame(), url.stringCenterEllipsizedToLength());
LOG(ResourceLoading, "CachedResourceLoader::canRequestAfterRedirection URL was not allowed by SecurityOrigin::canDisplay");
CACHEDRESOURCELOADER_RELEASE_LOG("canRequestAfterRedirection: URL was not allowed by SecurityOrigin::canDisplay");
return false;
}
// FIXME: According to https://fetch.spec.whatwg.org/#http-redirect-fetch, we should check that the URL is HTTP(s) except if in navigation mode.
// But we currently allow at least data URLs to be loaded.
if (options.mode == FetchOptions::Mode::SameOrigin && !m_document->securityOrigin().canRequest(url)) {
CACHEDRESOURCELOADER_RELEASE_LOG("canRequestAfterRedirection: URL was not allowed by SecurityOrigin::canRequest");
printAccessDeniedMessage(url);
return false;
}
if (!allowedByContentSecurityPolicy(type, url, options, ContentSecurityPolicy::RedirectResponseReceived::Yes, preRedirectURL)) {
CACHEDRESOURCELOADER_RELEASE_LOG("canRequestAfterRedirection: URL was not allowed by content policy");
return false;
}
// Last of all, check for insecure content. We do this last so that when folks block insecure content with a CSP policy, they don't get a warning.
// They'll still get a warning in the console about CSP blocking the load.
if (!checkInsecureContent(type, url)) {
CACHEDRESOURCELOADER_RELEASE_LOG("canRequestAfterRedirection: URL was not allowed because content is insecure");
return false;
}
return true;
}
bool CachedResourceLoader::updateRequestAfterRedirection(CachedResource::Type type, ResourceRequest& request, const ResourceLoaderOptions& options, const URL& preRedirectURL)
{
ASSERT(m_documentLoader);
if (auto* document = m_documentLoader->cachedResourceLoader().document())
upgradeInsecureResourceRequestIfNeeded(request, *document);
// FIXME: We might want to align the checks done here with the ones done in CachedResourceLoader::requestResource, content extensions blocking in particular.
return canRequestAfterRedirection(type, request.url(), options, preRedirectURL);
}
bool CachedResourceLoader::canRequestInContentDispositionAttachmentSandbox(CachedResource::Type type, const URL& url) const
{
Document* document;
// FIXME: Do we want to expand this to all resource types that the mixed content checker would consider active content?
switch (type) {
case CachedResource::Type::MainResource:
if (auto ownerElement = frame() ? frame()->ownerElement() : nullptr) {
document = &ownerElement->document();
break;
}
return true;
case CachedResource::Type::CSSStyleSheet:
document = m_document.get();
break;
default:
return true;
}
if (!document->shouldEnforceContentDispositionAttachmentSandbox() || document->securityOrigin().canRequest(url))
return true;
String message = "Unsafe attempt to load URL " + url.stringCenterEllipsizedToLength() + " from document with Content-Disposition: attachment at URL " + document->url().stringCenterEllipsizedToLength() + ".";
document->addConsoleMessage(MessageSource::Security, MessageLevel::Error, message);
return false;
}
bool CachedResourceLoader::shouldContinueAfterNotifyingLoadedFromMemoryCache(const CachedResourceRequest& request, CachedResource& resource, ResourceError& error)
{
if (!frame() || resource.status() != CachedResource::Cached)
return true;
ResourceRequest newRequest = ResourceRequest(resource.url());
newRequest.setInitiatorIdentifier(request.resourceRequest().initiatorIdentifier());
if (auto inspectorInitiatorNodeIdentifier = request.resourceRequest().inspectorInitiatorNodeIdentifier())
newRequest.setInspectorInitiatorNodeIdentifier(*inspectorInitiatorNodeIdentifier);
if (request.resourceRequest().hiddenFromInspector())
newRequest.setHiddenFromInspector(true);
frame()->loader().loadedResourceFromMemoryCache(resource, newRequest, error);
// FIXME <http://webkit.org/b/113251>: If the delegate modifies the request's
// URL, it is no longer appropriate to use this CachedResource.
return !newRequest.isNull();
}
bool CachedResourceLoader::shouldUpdateCachedResourceWithCurrentRequest(const CachedResource& resource, const CachedResourceRequest& request)
{
// WebKit is not supporting CORS for fonts (https://bugs.webkit.org/show_bug.cgi?id=86817), no need to update the resource before reusing it.
if (resource.type() == CachedResource::Type::FontResource)
return false;
if (resource.type() == CachedResource::Type::SVGFontResource)
return false;
#if ENABLE(XSLT)
// Load is same-origin, we do not check for CORS.
if (resource.type() == CachedResource::Type::XSLStyleSheet)
return false;
#endif
// FIXME: We should enable resource reuse for these resource types
switch (resource.type()) {
case CachedResource::Type::SVGDocumentResource:
return false;
case CachedResource::Type::MainResource:
return false;
case CachedResource::Type::LinkPrefetch:
return false;
default:
break;
}
if (resource.options().mode != request.options().mode || !serializedOriginsMatch(request.origin(), resource.origin()))
return true;
if (resource.options().redirect != request.options().redirect && resource.hasRedirections())
return true;
return false;
}
static inline bool isResourceSuitableForDirectReuse(const CachedResource& resource, const CachedResourceRequest& request)
{
// FIXME: For being loaded requests, the response tainting may not be correctly computed if the fetch mode is not the same.
// Even if the fetch mode is the same, we are not sure that the resource can be reused (Vary: Origin header for instance).
// We should find a way to improve this.
if (resource.status() != CachedResource::Cached)
return false;
// If the cached resource has not followed redirections, it is incomplete and we should not use it.
// Let's make sure the memory cache has no such resource.
ASSERT(resource.response().type() != ResourceResponse::Type::Opaqueredirect);
// We could support redirect modes other than Follow in case of a redirected resource.
// This case is rare and is not worth optimizing currently.
if (request.options().redirect != FetchOptions::Redirect::Follow && resource.hasRedirections())
return false;
// FIXME: Implement reuse of cached raw resources.
if (resource.type() == CachedResource::Type::RawResource || resource.type() == CachedResource::Type::MediaResource)
return false;
if (resource.type() == CachedResource::Type::Beacon || resource.type() == CachedResource::Type::Ping)
return false;
return true;
}
CachedResourceHandle<CachedResource> CachedResourceLoader::updateCachedResourceWithCurrentRequest(const CachedResource& resource, CachedResourceRequest&& request, PAL::SessionID sessionID, const CookieJar& cookieJar, const Settings& settings)
{
if (!isResourceSuitableForDirectReuse(resource, request)) {
request.setCachingPolicy(CachingPolicy::DisallowCaching);
return loadResource(resource.type(), sessionID, WTFMove(request), cookieJar, settings);
}
auto resourceHandle = createResource(resource.type(), WTFMove(request), sessionID, &cookieJar, settings);
resourceHandle->loadFrom(resource);
return resourceHandle;
}
static inline void logMemoryCacheResourceRequest(Frame* frame, const String& key, const String& description)
{
if (!frame || !frame->page())
return;
frame->page()->diagnosticLoggingClient().logDiagnosticMessage(key, description, ShouldSample::Yes);
}
void CachedResourceLoader::prepareFetch(CachedResource::Type type, CachedResourceRequest& request)
{
// Implementing step 1.1 to 1.6 of https://fetch.spec.whatwg.org/#concept-fetch.
if (auto* document = this->document()) {
if (!request.origin())
request.setOrigin(document->securityOrigin());
#if ENABLE(SERVICE_WORKER)
request.setClientIdentifierIfNeeded(document->identifier());
if (auto* activeServiceWorker = document->activeServiceWorker())
request.setSelectedServiceWorkerRegistrationIdentifierIfNeeded(activeServiceWorker->registrationIdentifier());
#endif
}
request.setAcceptHeaderIfNone(type);
// Accept-Language value is handled in underlying port-specific code.
// FIXME: Decide whether to support client hints
}
void CachedResourceLoader::updateHTTPRequestHeaders(FrameLoader& frameLoader, CachedResource::Type type, CachedResourceRequest& request)
{
// Implementing steps 11 to 19 of https://fetch.spec.whatwg.org/#http-network-or-cache-fetch as of 22 Feb 2022.
// FIXME: We should reconcile handling of MainResource with other resources.
if (type != CachedResource::Type::MainResource)
request.updateReferrerAndOriginHeaders(frameLoader);
if (frameLoader.frame().settings().fetchMetadataEnabled())
request.updateFetchMetadataHeaders();
request.updateUserAgentHeader(frameLoader);
request.updateAccordingCacheMode();
request.updateAcceptEncodingHeader();
}
static FetchOptions::Destination destinationForType(CachedResource::Type type, Frame& frame)
{
switch (type) {
case CachedResource::Type::MainResource:
return frame.isMainFrame() ? FetchOptions::Destination::Document : FetchOptions::Destination::Iframe;
case CachedResource::Type::SVGDocumentResource:
return FetchOptions::Destination::Document;
case CachedResource::Type::ImageResource:
case CachedResource::Type::Icon:
return FetchOptions::Destination::Image;
case CachedResource::Type::CSSStyleSheet:
return FetchOptions::Destination::Style;
case CachedResource::Type::Script:
return FetchOptions::Destination::Script;
case CachedResource::Type::FontResource:
case CachedResource::Type::SVGFontResource:
return FetchOptions::Destination::Font;
#if ENABLE(XSLT)
case CachedResource::Type::XSLStyleSheet:
return FetchOptions::Destination::Xslt;
#endif
#if ENABLE(VIDEO)
case CachedResource::Type::TextTrackResource:
return FetchOptions::Destination::Track;
#endif
#if ENABLE(APPLICATION_MANIFEST)
case CachedResource::Type::ApplicationManifest:
return FetchOptions::Destination::Manifest;
#endif
case CachedResource::Type::Beacon:
case CachedResource::Type::Ping:
case CachedResource::Type::LinkPrefetch:
case CachedResource::Type::RawResource:
case CachedResource::Type::MediaResource:
#if ENABLE(MODEL_ELEMENT)
case CachedResource::Type::ModelResource:
#endif
// The caller is responsible for setting the appropriate destination.
return FetchOptions::Destination::EmptyString;
}
ASSERT_NOT_REACHED();
return FetchOptions::Destination::EmptyString;
}
static inline bool isSVGImageCachedResource(const CachedResource* resource)
{
if (!resource || !is<CachedImage>(*resource))
return false;
return downcast<CachedImage>(*resource).hasSVGImage();
}
static inline SVGImage* cachedResourceSVGImage(CachedResource* resource)
{
if (!isSVGImageCachedResource(resource))
return nullptr;
return downcast<SVGImage>(downcast<CachedImage>(*resource).image());
}
ResourceErrorOr<CachedResourceHandle<CachedResource>> CachedResourceLoader::requestResource(CachedResource::Type type, CachedResourceRequest&& request, ForPreload forPreload, ImageLoading imageLoading)
{
URL url = request.resourceRequest().url();
if (!frame() || !frame()->page()) {
CACHEDRESOURCELOADER_RELEASE_LOG("requestResource: failed because no frame or page");
return makeUnexpected(ResourceError { errorDomainWebKitInternal, 0, url, "Invalid loader state"_s });
}
auto& frame = *this->frame();
if (!url.isValid()) {
CACHEDRESOURCELOADER_RELEASE_LOG_WITH_FRAME("requestResource: URL is invalid", frame);
return makeUnexpected(ResourceError { errorDomainWebKitInternal, 0, url, "URL is invalid"_s });
}
LOG(ResourceLoading, "CachedResourceLoader::requestResource '%.255s', charset '%s', priority=%d, forPreload=%u", url.stringCenterEllipsizedToLength().latin1().data(), request.charset().latin1().data(), request.priority() ? static_cast<int>(request.priority().value()) : -1, forPreload == ForPreload::Yes);
request.setDestinationIfNotSet(destinationForType(type, frame));
// Entry point to https://fetch.spec.whatwg.org/#main-fetch.
std::unique_ptr<ResourceRequest> originalRequest;
if (CachedResource::shouldUsePingLoad(type) || request.options().destination == FetchOptions::Destination::EmptyString) {
originalRequest = makeUnique<ResourceRequest>(request.resourceRequest());
originalRequest->clearHTTPReferrer();
originalRequest->clearHTTPOrigin();
}
prepareFetch(type, request);
if (request.options().destination == FetchOptions::Destination::Document || request.options().destination == FetchOptions::Destination::Iframe) {
// FIXME: Identify HSTS cases and avoid adding the header. <https://bugs.webkit.org/show_bug.cgi?id=157885>
if (!url.protocolIs("https"_s))
request.resourceRequest().setHTTPHeaderField(HTTPHeaderName::UpgradeInsecureRequests, "1"_s);
}
if (Document* document = this->document()) {
request.upgradeInsecureRequestIfNeeded(*document);
url = request.resourceRequest().url();
}
// We are passing url as well as request, as request url may contain a fragment identifier.
if (!canRequest(type, url, request.options(), forPreload)) {
CACHEDRESOURCELOADER_RELEASE_LOG_WITH_FRAME("requestResource: Not allowed to request resource", frame);
return makeUnexpected(ResourceError { errorDomainWebKitInternal, 0, url, "Not allowed to request resource"_s, ResourceError::Type::AccessControl });
}
if (!portAllowed(url)) {
if (forPreload == ForPreload::No)
FrameLoader::reportBlockedLoadFailed(frame, url);
CACHEDRESOURCELOADER_RELEASE_LOG_WITH_FRAME("CachedResourceLoader::requestResource URL has a blocked port", frame);
return makeUnexpected(frame.loader().blockedError(request.resourceRequest()));
}
request.updateReferrerPolicy(document() ? document()->referrerPolicy() : ReferrerPolicy::Default);
if (InspectorInstrumentation::willIntercept(&frame, request.resourceRequest()))
request.setCachingPolicy(CachingPolicy::DisallowCaching);
auto& page = *frame.page();
#if ENABLE(CONTENT_EXTENSIONS)
if (m_documentLoader) {
const auto& resourceRequest = request.resourceRequest();
auto results = page.userContentProvider().processContentRuleListsForLoad(page, resourceRequest.url(), ContentExtensions::toResourceType(type, request.resourceRequest().requester()), *m_documentLoader);
bool blockedLoad = results.summary.blockedLoad;
bool madeHTTPS = results.summary.madeHTTPS;
request.applyResults(WTFMove(results), &page);
if (blockedLoad) {
CACHEDRESOURCELOADER_RELEASE_LOG_WITH_FRAME("requestResource: Resource blocked by content blocker", frame);
if (type == CachedResource::Type::MainResource) {
auto resource = createResource(type, WTFMove(request), page.sessionID(), &page.cookieJar(), page.settings());
ASSERT(resource);
resource->error(CachedResource::Status::LoadError);
resource->setResourceError(ResourceError(ContentExtensions::WebKitContentBlockerDomain, 0, resourceRequest.url(), WEB_UI_STRING("The URL was blocked by a content blocker", "WebKitErrorBlockedByContentBlocker description")));
return resource;
}
return makeUnexpected(ResourceError { errorDomainWebKitInternal, 0, url, "Resource blocked by content blocker"_s, ResourceError::Type::AccessControl });
}
if (madeHTTPS
&& type == CachedResource::Type::MainResource
&& m_documentLoader->isLoadingMainResource()) {
// This is to make sure the correct 'new' URL shows in the location bar.
m_documentLoader->frameLoader()->client().dispatchDidChangeProvisionalURL();
}
url = request.resourceRequest().url(); // The content extension could have changed it from http to https.
url = MemoryCache::removeFragmentIdentifierIfNeeded(url); // Might need to remove fragment identifier again.
}
#endif
if (m_documentLoader && !m_documentLoader->customHeaderFields().isEmpty()) {
bool sameOriginRequest = false;
auto requestedOrigin = SecurityOrigin::create(url);
if (type == CachedResource::Type::MainResource) {
if (frame.isMainFrame())
sameOriginRequest = true;
else if (auto* topDocument = frame.mainFrame().document())
sameOriginRequest = topDocument->securityOrigin().isSameSchemeHostPort(requestedOrigin.get());
} else if (document()) {
sameOriginRequest = document()->topOrigin().isSameSchemeHostPort(requestedOrigin.get())
&& document()->securityOrigin().isSameSchemeHostPort(requestedOrigin.get());
}
for (auto& fields : m_documentLoader->customHeaderFields()) {
if (sameOriginRequest || fields.thirdPartyDomainsMatch(url)) {
for (auto& field : fields.fields)
request.resourceRequest().setHTTPHeaderField(field.name(), field.value());
}
}
}
ResourceLoadTiming loadTiming;
loadTiming.markStartTime();
InitiatorContext initiatorContext = request.options().initiatorContext;
if (request.resourceRequest().url().protocolIsInHTTPFamily())
updateHTTPRequestHeaders(frame.loader(), type, request);
auto& memoryCache = MemoryCache::singleton();
if (request.allowsCaching() && memoryCache.disabled())
m_documentResources.remove(url.string());
// See if we can use an existing resource from the cache.
CachedResourceHandle<CachedResource> resource;
if (document())
request.setDomainForCachePartition(*document());
if (request.allowsCaching())
resource = memoryCache.resourceForRequest(request.resourceRequest(), page.sessionID());
if (resource && request.isLinkPreload() && !resource->isLinkPreload())
resource->setLinkPreload();
logMemoryCacheResourceRequest(&frame, DiagnosticLoggingKeys::memoryCacheUsageKey(), resource ? DiagnosticLoggingKeys::inMemoryCacheKey() : DiagnosticLoggingKeys::notInMemoryCacheKey());
auto& cookieJar = page.cookieJar();
RevalidationPolicy policy = determineRevalidationPolicy(type, request, resource.get(), forPreload, imageLoading);
switch (policy) {
case Reload:
memoryCache.remove(*resource);