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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/loader/safe_browsing_resource_throttle.h"
#include <iterator>
#include <utility>
#include "base/logging.h"
#include "base/trace_event/trace_event.h"
#include "chrome/browser/prerender/prerender_contents.h"
#include "chrome/browser/safe_browsing/safe_browsing_service.h"
#include "components/safe_browsing/base_ui_manager.h"
#include "components/safe_browsing_db/util.h"
#include "components/safe_browsing_db/v4_feature_list.h"
#include "components/safe_browsing_db/v4_local_database_manager.h"
#include "components/security_interstitials/content/unsafe_resource.h"
#include "components/subresource_filter/content/browser/content_subresource_filter_driver_factory.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/resource_request_info.h"
#include "content/public/browser/web_contents.h"
#include "net/url_request/redirect_info.h"
#include "net/url_request/url_request.h"
using safe_browsing::BaseUIManager;
namespace {
// Destroys the prerender contents associated with the web_contents, if any.
void DestroyPrerenderContents(
const content::ResourceRequestInfo::WebContentsGetter&
web_contents_getter) {
content::WebContents* web_contents = web_contents_getter.Run();
if (web_contents) {
prerender::PrerenderContents* prerender_contents =
prerender::PrerenderContents::FromWebContents(web_contents);
if (prerender_contents)
prerender_contents->Destroy(prerender::FINAL_STATUS_SAFE_BROWSING);
}
}
} // namespace
// static
SafeBrowsingResourceThrottle* SafeBrowsingResourceThrottle::MaybeCreate(
net::URLRequest* request,
content::ResourceType resource_type,
safe_browsing::SafeBrowsingService* sb_service) {
if (sb_service->database_manager()->IsSupported()) {
return new SafeBrowsingResourceThrottle(request, resource_type, sb_service);
}
return nullptr;
}
SafeBrowsingResourceThrottle::SafeBrowsingResourceThrottle(
const net::URLRequest* request,
content::ResourceType resource_type,
safe_browsing::SafeBrowsingService* sb_service)
: safe_browsing::BaseResourceThrottle(
request,
resource_type,
safe_browsing::V4FeatureList::IsV4HybridEnabled()
? sb_service->v4_local_database_manager()
: sb_service->database_manager(),
sb_service->ui_manager()) {}
SafeBrowsingResourceThrottle::~SafeBrowsingResourceThrottle() {}
const char* SafeBrowsingResourceThrottle::GetNameForLogging() const {
return "SafeBrowsingResourceThrottle";
}
void SafeBrowsingResourceThrottle::MaybeDestroyPrerenderContents(
const content::ResourceRequestInfo* info) {
// Destroy the prefetch with FINAL_STATUS_SAFEBROSWING.
content::BrowserThread::PostTask(
content::BrowserThread::UI, FROM_HERE,
base::Bind(&DestroyPrerenderContents,
info->GetWebContentsGetterForRequest()));
}
void SafeBrowsingResourceThrottle::StartDisplayingBlockingPageHelper(
security_interstitials::UnsafeResource resource) {
content::BrowserThread::PostTask(
content::BrowserThread::UI, FROM_HERE,
base::Bind(&SafeBrowsingResourceThrottle::StartDisplayingBlockingPage,
AsWeakPtr(), ui_manager(), resource));
}
// Static
void SafeBrowsingResourceThrottle::StartDisplayingBlockingPage(
const base::WeakPtr<safe_browsing::BaseResourceThrottle>& throttle,
scoped_refptr<BaseUIManager> ui_manager,
const security_interstitials::UnsafeResource& resource) {
content::WebContents* web_contents = resource.web_contents_getter.Run();
if (web_contents) {
// Once activated, the subresource filter will filter subresources, but is
// triggered when the main frame document matches Safe Browsing blacklists.
if (!resource.is_subresource) {
using subresource_filter::ContentSubresourceFilterDriverFactory;
ContentSubresourceFilterDriverFactory* driver_factory =
ContentSubresourceFilterDriverFactory::FromWebContents(web_contents);
DCHECK(driver_factory);
// For a redirect chain of A -> B -> C, the subresource filter expects C
// as the resource URL and [A, B] as redirect URLs.
std::vector<GURL> redirect_parent_urls;
if (!resource.redirect_urls.empty()) {
redirect_parent_urls.push_back(resource.original_url);
redirect_parent_urls.insert(redirect_parent_urls.end(),
resource.redirect_urls.begin(),
std::prev(resource.redirect_urls.end()));
}
driver_factory->OnMainResourceMatchedSafeBrowsingBlacklist(
resource.url, redirect_parent_urls, resource.threat_type,
resource.threat_metadata.threat_pattern_type);
}
prerender::PrerenderContents* prerender_contents =
prerender::PrerenderContents::FromWebContents(web_contents);
if (prerender_contents) {
prerender_contents->Destroy(prerender::FINAL_STATUS_SAFE_BROWSING);
} else {
ui_manager->DisplayBlockingPage(resource);
return;
}
}
// Tab is gone or it's being prerendered.
content::BrowserThread::PostTask(
content::BrowserThread::IO, FROM_HERE,
base::Bind(&SafeBrowsingResourceThrottle::Cancel, throttle));
}
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