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/*
* Copyright (C) 2006-2017 Apple Inc. All rights reserved.
* Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
* Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
* Copyright (C) 2008 Alp Toker <alp@atoker.com>
* Copyright (C) Research In Motion Limited 2009. 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.
* 3. Neither the name of Apple Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE 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 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 "SubframeLoader.h"
#include "ContentSecurityPolicy.h"
#include "DiagnosticLoggingClient.h"
#include "DiagnosticLoggingKeys.h"
#include "DocumentLoader.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "FrameLoaderClient.h"
#include "HTMLAppletElement.h"
#include "HTMLFrameElement.h"
#include "HTMLIFrameElement.h"
#include "HTMLNames.h"
#include "HTMLObjectElement.h"
#include "MIMETypeRegistry.h"
#include "NavigationScheduler.h"
#include "Page.h"
#include "PluginData.h"
#include "PluginDocument.h"
#include "RenderEmbeddedObject.h"
#include "RenderView.h"
#include "ScriptController.h"
#include "SecurityOrigin.h"
#include "SecurityPolicy.h"
#include "Settings.h"
#include <wtf/CompletionHandler.h>
namespace WebCore {
using namespace HTMLNames;
SubframeLoader::SubframeLoader(Frame& frame)
: m_containsPlugins(false)
, m_frame(frame)
{
}
void SubframeLoader::clear()
{
m_containsPlugins = false;
}
bool SubframeLoader::requestFrame(HTMLFrameOwnerElement& ownerElement, const String& urlString, const AtomicString& frameName, LockHistory lockHistory, LockBackForwardList lockBackForwardList)
{
// Support for <frame src="javascript:string">
URL scriptURL;
URL url;
if (WTF::protocolIsJavaScript(urlString)) {
scriptURL = completeURL(urlString); // completeURL() encodes the URL.
url = WTF::blankURL();
} else
url = completeURL(urlString);
if (shouldConvertInvalidURLsToBlank() && !url.isValid())
url = WTF::blankURL();
// If we will schedule a JavaScript URL load, we need to delay the firing of the load event at least until we've run the JavaScript in the URL.
CompletionHandlerCallingScope stopDelayingLoadEvent;
if (!scriptURL.isEmpty()) {
ownerElement.document().incrementLoadEventDelayCount();
stopDelayingLoadEvent = CompletionHandlerCallingScope([ownerDocument = makeRef(ownerElement.document())] {
ownerDocument->decrementLoadEventDelayCount();
});
}
Frame* frame = loadOrRedirectSubframe(ownerElement, url, frameName, lockHistory, lockBackForwardList);
if (!frame)
return false;
if (!scriptURL.isEmpty() && ownerElement.isURLAllowed(scriptURL)) {
// FIXME: Some sites rely on the javascript:'' loading synchronously, which is why we have this special case.
// Blink has the same workaround (https://bugs.chromium.org/p/chromium/issues/detail?id=923585).
if (urlString == "javascript:''" || urlString == "javascript:\"\"")
frame->script().executeIfJavaScriptURL(scriptURL);
else
frame->navigationScheduler().scheduleLocationChange(ownerElement.document(), ownerElement.document().securityOrigin(), scriptURL, m_frame.loader().outgoingReferrer(), lockHistory, lockBackForwardList, stopDelayingLoadEvent.release());
}
return true;
}
bool SubframeLoader::resourceWillUsePlugin(const String& url, const String& mimeType)
{
URL completedURL;
if (!url.isEmpty())
completedURL = completeURL(url);
bool useFallback;
return shouldUsePlugin(completedURL, mimeType, false, useFallback);
}
bool SubframeLoader::pluginIsLoadable(const URL& url, const String& mimeType)
{
auto* document = m_frame.document();
if (MIMETypeRegistry::isJavaAppletMIMEType(mimeType)) {
if (!m_frame.settings().isJavaEnabled())
return false;
if (document && document->securityOrigin().isLocal() && !m_frame.settings().isJavaEnabledForLocalFiles())
return false;
}
if (document) {
if (document->isSandboxed(SandboxPlugins))
return false;
if (!document->securityOrigin().canDisplay(url)) {
FrameLoader::reportLocalLoadFailed(&m_frame, url.string());
return false;
}
if (!m_frame.loader().mixedContentChecker().canRunInsecureContent(document->securityOrigin(), url))
return false;
}
return true;
}
bool SubframeLoader::requestPlugin(HTMLPlugInImageElement& ownerElement, const URL& url, const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues, bool useFallback)
{
// Application plug-ins are plug-ins implemented by the user agent, for example Qt plug-ins,
// as opposed to third-party code such as Flash. The user agent decides whether or not they are
// permitted, rather than WebKit.
if ((!allowPlugins() && !MIMETypeRegistry::isApplicationPluginMIMEType(mimeType)))
return false;
if (!pluginIsLoadable(url, mimeType))
return false;
ASSERT(ownerElement.hasTagName(objectTag) || ownerElement.hasTagName(embedTag));
return loadPlugin(ownerElement, url, mimeType, paramNames, paramValues, useFallback);
}
static String findPluginMIMETypeFromURL(Page* page, const String& url)
{
if (!url)
return String();
size_t dotIndex = url.reverseFind('.');
if (dotIndex == notFound)
return String();
String extension = url.substring(dotIndex + 1);
const PluginData& pluginData = page->pluginData();
Vector<MimeClassInfo> mimes;
Vector<size_t> mimePluginIndices;
pluginData.getWebVisibleMimesAndPluginIndices(mimes, mimePluginIndices);
for (auto& mime : mimes) {
for (auto& mimeExtension : mime.extensions) {
if (equalIgnoringASCIICase(extension, mimeExtension))
return mime.type;
}
}
return String();
}
static void logPluginRequest(Page* page, const String& mimeType, const String& url, bool success)
{
if (!page)
return;
String newMIMEType = mimeType;
if (!newMIMEType) {
// Try to figure out the MIME type from the URL extension.
newMIMEType = findPluginMIMETypeFromURL(page, url);
if (!newMIMEType)
return;
}
String pluginFile = page->pluginData().pluginFileForWebVisibleMimeType(newMIMEType);
String description = !pluginFile ? newMIMEType : pluginFile;
DiagnosticLoggingClient& diagnosticLoggingClient = page->diagnosticLoggingClient();
diagnosticLoggingClient.logDiagnosticMessage(success ? DiagnosticLoggingKeys::pluginLoadedKey() : DiagnosticLoggingKeys::pluginLoadingFailedKey(), description, ShouldSample::No);
if (!page->hasSeenAnyPlugin())
diagnosticLoggingClient.logDiagnosticMessage(DiagnosticLoggingKeys::pageContainsAtLeastOnePluginKey(), emptyString(), ShouldSample::No);
if (!page->hasSeenPlugin(description))
diagnosticLoggingClient.logDiagnosticMessage(DiagnosticLoggingKeys::pageContainsPluginKey(), description, ShouldSample::No);
page->sawPlugin(description);
}
bool SubframeLoader::requestObject(HTMLPlugInImageElement& ownerElement, const String& url, const AtomicString& frameName, const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues)
{
if (url.isEmpty() && mimeType.isEmpty())
return false;
auto& document = ownerElement.document();
URL completedURL;
if (!url.isEmpty())
completedURL = completeURL(url);
document.contentSecurityPolicy()->upgradeInsecureRequestIfNeeded(completedURL, ContentSecurityPolicy::InsecureRequestType::Load);
bool hasFallbackContent = is<HTMLObjectElement>(ownerElement) && downcast<HTMLObjectElement>(ownerElement).hasFallbackContent();
bool useFallback;
if (shouldUsePlugin(completedURL, mimeType, hasFallbackContent, useFallback)) {
bool success = requestPlugin(ownerElement, completedURL, mimeType, paramNames, paramValues, useFallback);
logPluginRequest(document.page(), mimeType, completedURL, success);
return success;
}
// If the plug-in element already contains a subframe, loadOrRedirectSubframe will re-use it. Otherwise,
// it will create a new frame and set it as the RenderWidget's Widget, causing what was previously
// in the widget to be torn down.
return loadOrRedirectSubframe(ownerElement, completedURL, frameName, LockHistory::Yes, LockBackForwardList::Yes);
}
RefPtr<Widget> SubframeLoader::createJavaAppletWidget(const IntSize& size, HTMLAppletElement& element, const Vector<String>& paramNames, const Vector<String>& paramValues)
{
String baseURLString;
String codeBaseURLString;
for (size_t i = 0; i < paramNames.size(); ++i) {
if (equalLettersIgnoringASCIICase(paramNames[i], "baseurl"))
baseURLString = paramValues[i];
else if (equalLettersIgnoringASCIICase(paramNames[i], "codebase"))
codeBaseURLString = paramValues[i];
}
if (!codeBaseURLString.isEmpty()) {
URL codeBaseURL = completeURL(codeBaseURLString);
if (!element.document().securityOrigin().canDisplay(codeBaseURL)) {
FrameLoader::reportLocalLoadFailed(&m_frame, codeBaseURL.string());
return nullptr;
}
const char javaAppletMimeType[] = "application/x-java-applet";
ASSERT(element.document().contentSecurityPolicy());
auto& contentSecurityPolicy = *element.document().contentSecurityPolicy();
// Elements in user agent show tree should load whatever the embedding document policy is.
if (!element.isInUserAgentShadowTree()
&& (!contentSecurityPolicy.allowObjectFromSource(codeBaseURL) || !contentSecurityPolicy.allowPluginType(javaAppletMimeType, javaAppletMimeType, codeBaseURL)))
return nullptr;
}
if (baseURLString.isEmpty())
baseURLString = element.document().baseURL().string();
URL baseURL = completeURL(baseURLString);
RefPtr<Widget> widget;
if (allowPlugins())
widget = m_frame.loader().client().createJavaAppletWidget(size, element, baseURL, paramNames, paramValues);
logPluginRequest(m_frame.page(), element.serviceType(), String(), widget);
if (!widget) {
RenderEmbeddedObject* renderer = element.renderEmbeddedObject();
if (!renderer->isPluginUnavailable())
renderer->setPluginUnavailabilityReason(RenderEmbeddedObject::PluginMissing);
return nullptr;
}
m_containsPlugins = true;
return widget;
}
Frame* SubframeLoader::loadOrRedirectSubframe(HTMLFrameOwnerElement& ownerElement, const URL& requestURL, const AtomicString& frameName, LockHistory lockHistory, LockBackForwardList lockBackForwardList)
{
auto& initiatingDocument = ownerElement.document();
URL upgradedRequestURL = requestURL;
initiatingDocument.contentSecurityPolicy()->upgradeInsecureRequestIfNeeded(upgradedRequestURL, ContentSecurityPolicy::InsecureRequestType::Load);
auto* frame = ownerElement.contentFrame();
if (frame)
frame->navigationScheduler().scheduleLocationChange(initiatingDocument, initiatingDocument.securityOrigin(), upgradedRequestURL, m_frame.loader().outgoingReferrer(), lockHistory, lockBackForwardList);
else
frame = loadSubframe(ownerElement, upgradedRequestURL, frameName, m_frame.loader().outgoingReferrer());
if (!frame)
return nullptr;
ASSERT(ownerElement.contentFrame() == frame || !ownerElement.contentFrame());
return ownerElement.contentFrame();
}
Frame* SubframeLoader::loadSubframe(HTMLFrameOwnerElement& ownerElement, const URL& url, const String& name, const String& referrer)
{
Ref<Frame> protect(m_frame);
auto document = makeRef(ownerElement.document());
if (!document->securityOrigin().canDisplay(url)) {
FrameLoader::reportLocalLoadFailed(&m_frame, url.string());
return nullptr;
}
if (!SubframeLoadingDisabler::canLoadFrame(ownerElement))
return nullptr;
ReferrerPolicy policy = ownerElement.referrerPolicy();
if (policy == ReferrerPolicy::EmptyString)
policy = document->referrerPolicy();
String referrerToUse = SecurityPolicy::generateReferrerHeader(policy, url, referrer);
// Prevent initial empty document load from triggering load events.
document->incrementLoadEventDelayCount();
auto frame = m_frame.loader().client().createFrame(url, name, ownerElement, referrerToUse);
document->decrementLoadEventDelayCount();
if (!frame) {
m_frame.loader().checkCallImplicitClose();
return nullptr;
}
// All new frames will have m_isComplete set to true at this point due to synchronously loading
// an empty document in FrameLoader::init(). But many frames will now be starting an
// asynchronous load of url, so we set m_isComplete to false and then check if the load is
// actually completed below. (Note that we set m_isComplete to false even for synchronous
// loads, so that checkCompleted() below won't bail early.)
// FIXME: Can we remove this entirely? m_isComplete normally gets set to false when a load is committed.
frame->loader().started();
auto* renderer = ownerElement.renderer();
auto* view = frame->view();
if (is<RenderWidget>(renderer) && view)
downcast<RenderWidget>(*renderer).setWidget(view);
m_frame.loader().checkCallImplicitClose();
// Some loads are performed synchronously (e.g., about:blank and loads
// cancelled by returning a null ResourceRequest from requestFromDelegate).
// In these cases, the synchronous load would have finished
// before we could connect the signals, so make sure to send the
// completed() signal for the child by hand and mark the load as being
// complete.
// FIXME: In this case the Frame will have finished loading before
// it's being added to the child list. It would be a good idea to
// create the child first, then invoke the loader separately.
if (frame->loader().state() == FrameStateComplete && !frame->loader().policyDocumentLoader())
frame->loader().checkCompleted();
return frame.get();
}
bool SubframeLoader::allowPlugins()
{
return m_frame.settings().arePluginsEnabled();
}
bool SubframeLoader::shouldUsePlugin(const URL& url, const String& mimeType, bool hasFallback, bool& useFallback)
{
if (m_frame.loader().client().shouldAlwaysUsePluginDocument(mimeType)) {
useFallback = false;
return true;
}
ObjectContentType objectType = m_frame.loader().client().objectContentType(url, mimeType);
// If an object's content can't be handled and it has no fallback, let
// it be handled as a plugin to show the broken plugin icon.
useFallback = objectType == ObjectContentType::None && hasFallback;
return objectType == ObjectContentType::None || objectType == ObjectContentType::PlugIn;
}
bool SubframeLoader::loadPlugin(HTMLPlugInImageElement& pluginElement, const URL& url, const String& mimeType, const Vector<String>& paramNames, const Vector<String>& paramValues, bool useFallback)
{
if (useFallback)
return false;
auto& document = pluginElement.document();
auto* renderer = pluginElement.renderEmbeddedObject();
// FIXME: This code should not depend on renderer!
if (!renderer)
return false;
pluginElement.subframeLoaderWillCreatePlugIn(url);
IntSize contentSize = roundedIntSize(LayoutSize(renderer->contentWidth(), renderer->contentHeight()));
bool loadManually = is<PluginDocument>(document) && !m_containsPlugins && downcast<PluginDocument>(document).shouldLoadPluginManually();
#if PLATFORM(IOS_FAMILY)
// On iOS, we only tell the plugin to be in full page mode if the containing plugin document is the top level document.
if (document.ownerElement())
loadManually = false;
#endif
auto weakRenderer = makeWeakPtr(*renderer);
auto widget = m_frame.loader().client().createPlugin(contentSize, pluginElement, url, paramNames, paramValues, mimeType, loadManually);
// The call to createPlugin *may* cause this renderer to disappear from underneath.
if (!weakRenderer)
return false;
if (!widget) {
if (!renderer->isPluginUnavailable())
renderer->setPluginUnavailabilityReason(RenderEmbeddedObject::PluginMissing);
return false;
}
pluginElement.subframeLoaderDidCreatePlugIn(*widget);
renderer->setWidget(WTFMove(widget));
m_containsPlugins = true;
return true;
}
URL SubframeLoader::completeURL(const String& url) const
{
ASSERT(m_frame.document());
return m_frame.document()->completeURL(url);
}
bool SubframeLoader::shouldConvertInvalidURLsToBlank() const
{
return m_frame.settings().shouldConvertInvalidURLsToBlank();
}
} // namespace WebCore