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/*
* Copyright (C) 2016-2017 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. ``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
* 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 "LoadableClassicScript.h"
#include "DefaultResourceLoadPriority.h"
#include "FetchIdioms.h"
#include "ScriptElement.h"
#include "ScriptSourceCode.h"
#include "SubresourceIntegrity.h"
#include <wtf/NeverDestroyed.h>
#include <wtf/text/StringImpl.h>
namespace WebCore {
Ref<LoadableClassicScript> LoadableClassicScript::create(const AtomString& nonce, const AtomString& integrityMetadata, ReferrerPolicy policy, const AtomString& crossOriginMode, const String& charset, const AtomString& initiatorName, bool isInUserAgentShadowTree, bool isAsync)
{
return adoptRef(*new LoadableClassicScript(nonce, integrityMetadata, policy, crossOriginMode, charset, initiatorName, isInUserAgentShadowTree, isAsync));
}
LoadableClassicScript::LoadableClassicScript(const AtomString& nonce, const AtomString& integrity, ReferrerPolicy policy, const AtomString& crossOriginMode, const String& charset, const AtomString& initiatorName, bool isInUserAgentShadowTree, bool isAsync)
: LoadableScript(nonce, policy, crossOriginMode, charset, initiatorName, isInUserAgentShadowTree)
, m_integrity(integrity)
, m_isAsync(isAsync)
{
}
LoadableClassicScript::~LoadableClassicScript()
{
if (m_cachedScript)
m_cachedScript->removeClient(*this);
}
bool LoadableClassicScript::isLoaded() const
{
ASSERT(m_cachedScript);
return m_cachedScript->isLoaded();
}
std::optional<LoadableScript::Error> LoadableClassicScript::error() const
{
ASSERT(m_cachedScript);
if (m_error)
return m_error;
if (m_cachedScript->errorOccurred())
return Error { ErrorType::CachedScript, std::nullopt, std::nullopt };
return std::nullopt;
}
bool LoadableClassicScript::wasCanceled() const
{
ASSERT(m_cachedScript);
return m_cachedScript->wasCanceled();
}
void LoadableClassicScript::notifyFinished(CachedResource& resource, const NetworkLoadMetrics&)
{
ASSERT(m_cachedScript);
if (resource.resourceError().isAccessControl()) {
static NeverDestroyed<String> consoleMessage(MAKE_STATIC_STRING_IMPL("Cross-origin script load denied by Cross-Origin Resource Sharing policy."));
m_error = Error {
ErrorType::CrossOriginLoad,
ConsoleMessage {
MessageSource::JS,
MessageLevel::Error,
consoleMessage
},
std::nullopt
};
}
if (!m_error && !isScriptAllowedByNosniff(m_cachedScript->response())) {
m_error = Error {
ErrorType::Nosniff,
ConsoleMessage {
MessageSource::Security,
MessageLevel::Error,
makeString("Refused to execute ", m_cachedScript->url().stringCenterEllipsizedToLength(), " as script because \"X-Content-Type-Options: nosniff\" was given and its Content-Type is not a script MIME type.")
},
std::nullopt
};
}
if (!m_error && shouldBlockResponseDueToMIMEType(m_cachedScript->response(), m_cachedScript->options().destination)) {
m_error = Error {
ErrorType::MIMEType,
ConsoleMessage {
MessageSource::Security,
MessageLevel::Error,
makeString("Refused to execute ", m_cachedScript->url().stringCenterEllipsizedToLength(), " as script because ", m_cachedScript->response().mimeType(), " is not a script MIME type.")
},
std::nullopt
};
}
if (!m_error && !resource.errorOccurred() && !matchIntegrityMetadata(resource, m_integrity)) {
m_error = Error {
ErrorType::FailedIntegrityCheck,
ConsoleMessage { MessageSource::Security, MessageLevel::Error, makeString("Cannot load script ", integrityMismatchDescription(resource, m_integrity)) },
std::nullopt
};
}
notifyClientFinished();
}
void LoadableClassicScript::execute(ScriptElement& scriptElement)
{
ASSERT(!error());
scriptElement.executeClassicScript(ScriptSourceCode(m_cachedScript.get(), JSC::SourceProviderSourceType::Program, *this));
}
bool LoadableClassicScript::load(Document& document, const URL& sourceURL)
{
ASSERT(!m_cachedScript);
auto priority = [&]() -> std::optional<ResourceLoadPriority> {
if (m_isAsync)
return DefaultResourceLoadPriority::asyncScript;
// Use default.
return { };
};
m_cachedScript = requestScriptWithCache(document, sourceURL, crossOriginMode(), String { m_integrity }, priority());
if (!m_cachedScript)
return false;
m_cachedScript->addClient(*this);
return true;
}
}
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