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/*
* Copyright (C) 2023 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 "EarlyHintsResourceLoader.h"
#include "MessageSenderInlines.h"
#include "NetworkLoadParameters.h"
#include "PreconnectTask.h"
#include "WebPageMessages.h"
#include <WebCore/ContentSecurityPolicy.h>
#include <WebCore/LinkHeader.h>
#include <WebCore/ResourceLoaderOptions.h>
#include <WebCore/ResourceRequest.h>
#include <WebCore/ResourceResponse.h>
#include <WebCore/StoredCredentialsPolicy.h>
namespace WebKit {
using namespace WebCore;
EarlyHintsResourceLoader::EarlyHintsResourceLoader(NetworkResourceLoader& loader)
: m_loader(&loader)
{
}
EarlyHintsResourceLoader::~EarlyHintsResourceLoader() = default;
void EarlyHintsResourceLoader::addConsoleMessage(MessageSource messageSource, MessageLevel messageLevel, const String& message, unsigned long)
{
if (!m_loader)
return;
m_loader->send(Messages::WebPage::AddConsoleMessage { m_loader->frameID(), messageSource, messageLevel, message, m_loader->coreIdentifier() }, m_loader->pageID());
}
void EarlyHintsResourceLoader::enqueueSecurityPolicyViolationEvent(SecurityPolicyViolationEventInit&&)
{
}
void EarlyHintsResourceLoader::handleEarlyHintsResponse(ResourceResponse&& response)
{
RELEASE_ASSERT(response.httpStatusCode() == 103);
if (!m_loader)
return;
// For consistency with other browsers, only process early hints for top-level navigation from
// secure origins using HTTP/2 or later.
if (!m_loader->isMainFrameLoad() || response.url().protocol() != "https"_s || response.httpVersion().startsWith("HTTP/1"_s))
return;
// Only the first early hint response served during the navigation is handled.
// FIXME: discard hints on cross-origin redirect once we support early hint preloads.
if (m_hasReceivedEarlyHints)
return;
m_hasReceivedEarlyHints = true;
auto headerValue = response.httpHeaderField(HTTPHeaderName::Link);
if (headerValue.isEmpty())
return;
auto url = response.url();
ContentSecurityPolicy contentSecurityPolicy { URL { url }, this, nullptr };
contentSecurityPolicy.didReceiveHeaders(ContentSecurityPolicyResponseHeaders { response }, m_loader->originalRequest().httpReferrer());
LinkHeaderSet headerSet(headerValue);
for (const auto& header : headerSet) {
if (!header.valid() || header.url().isEmpty() || header.rel().isEmpty() || header.isViewportDependent())
continue;
if (equalLettersIgnoringASCIICase(header.rel(), "preconnect"_s))
startPreconnectTask(response.url(), header, contentSecurityPolicy);
}
}
ResourceRequest EarlyHintsResourceLoader::constructPreconnectRequest(const ResourceRequest& originalRequest, const URL& url)
{
ResourceRequest request { url };
// firstPartyForCookies and user agent are part of the HTTP socket pool keys in CFNetwork: rdar://59434166
auto firstPartyForCookies = originalRequest.firstPartyForCookies();
if (firstPartyForCookies.isValid())
request.setFirstPartyForCookies(firstPartyForCookies);
auto userAgent = originalRequest.httpUserAgent();
if (!userAgent.isEmpty())
request.setHTTPUserAgent(userAgent);
return request;
}
void EarlyHintsResourceLoader::startPreconnectTask(const URL& baseURL, const LinkHeader& header, const ContentSecurityPolicy& contentSecurityPolicy)
{
#if ENABLE(SERVER_PRECONNECT)
if (!m_loader || !m_loader->parameters().linkPreconnectEarlyHintsEnabled)
return;
URL url(baseURL, header.url());
if (!url.isValid() || url.protocol() != "https"_s)
return;
const auto& originalRequest = m_loader->originalRequest();
if (!contentSecurityPolicy.allowConnectToSource(url, ContentSecurityPolicy::RedirectResponseReceived::No, originalRequest.url()))
return;
auto* networkSession = m_loader->connectionToWebProcess().networkSession();
if (!networkSession)
return;
NetworkLoadParameters parameters;
auto globalFrameID = m_loader->globalFrameID();
parameters.webPageProxyID = globalFrameID.webPageProxyID;
parameters.webPageID = globalFrameID.webPageID;
parameters.webFrameID = globalFrameID.frameID;
parameters.storedCredentialsPolicy = equalLettersIgnoringASCIICase(header.crossOrigin(), "anonymous"_s) ? StoredCredentialsPolicy::DoNotUse : StoredCredentialsPolicy::Use;
parameters.contentSniffingPolicy = ContentSniffingPolicy::DoNotSniffContent;
parameters.contentEncodingSniffingPolicy = ContentEncodingSniffingPolicy::Default;
parameters.shouldPreconnectOnly = PreconnectOnly::Yes;
parameters.request = constructPreconnectRequest(originalRequest, url);
parameters.isNavigatingToAppBoundDomain = m_loader->parameters().isNavigatingToAppBoundDomain;
(new PreconnectTask(*networkSession, WTFMove(parameters), [](const WebCore::ResourceError&, const WebCore::NetworkLoadMetrics&) { }))->start();
addConsoleMessage(MessageSource::Network, MessageLevel::Info, makeString("Preconnecting to "_s, url.string(), " due to early hint"));
#else
UNUSED_PARAM(baseURL);
UNUSED_PARAM(header);
UNUSED_PARAM(contentSecurityPolicy);
#endif
}
} // namespace WebKit
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