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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/plugins/plugin_observer.h"
#include <utility>
#include "base/functional/bind.h"
#include "base/memory/raw_ptr.h"
#include "build/build_config.h"
#include "chrome/browser/plugins/plugin_observer_common.h"
#include "chrome/common/buildflags.h"
#include "components/download/public/common/download_url_parameters.h"
#include "components/metrics_services_manager/metrics_services_manager.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/download_manager.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_delegate.h"
#include "content/public/common/webplugininfo.h"
#include "extensions/browser/guest_view/web_view/web_view_guest.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "net/traffic_annotation/network_traffic_annotation.h"
// PluginObserver -------------------------------------------------------------
void PluginObserver::BindPluginHost(
mojo::PendingAssociatedReceiver<chrome::mojom::PluginHost> receiver,
content::RenderFrameHost* rfh) {
auto* web_contents = content::WebContents::FromRenderFrameHost(rfh);
if (!web_contents)
return;
auto* plugin_helper = PluginObserver::FromWebContents(web_contents);
if (!plugin_helper)
return;
plugin_helper->plugin_host_receivers_.Bind(rfh, std::move(receiver));
}
PluginObserver::PluginObserver(content::WebContents* web_contents)
: content::WebContentsObserver(web_contents),
content::WebContentsUserData<PluginObserver>(*web_contents),
plugin_host_receivers_(web_contents, this) {}
PluginObserver::~PluginObserver() = default;
void PluginObserver::OpenPDF(const GURL& url) {
content::RenderFrameHost* render_frame_host =
plugin_host_receivers_.GetCurrentTargetFrame();
// WebViews should never trigger PDF downloads.
if (extensions::WebViewGuest::FromRenderFrameHost(render_frame_host))
return;
content::Referrer referrer;
if (!CanOpenPdfUrl(render_frame_host, url,
web_contents()->GetLastCommittedURL(), &referrer)) {
return;
}
net::NetworkTrafficAnnotationTag traffic_annotation =
net::DefineNetworkTrafficAnnotation("pdf_plugin_placeholder", R"(
semantics {
sender: "PDF Plugin Placeholder"
description:
"When the PDF Viewer is unavailable, a placeholder is shown for "
"embedded PDFs. This placeholder allows the user to download and "
"open the PDF file via a button."
trigger:
"The user clicks the 'View PDF' button in the PDF placeholder."
data: "None."
destination: WEBSITE
}
policy {
cookies_allowed: NO
setting:
"This feature can be disabled via 'Download PDF files instead of "
"automatically opening them in Chrome' in settings under content. "
"The feature is disabled by default."
chrome_policy {
AlwaysOpenPdfExternally {
AlwaysOpenPdfExternally: false
}
}
})");
std::unique_ptr<download::DownloadUrlParameters> params =
std::make_unique<download::DownloadUrlParameters>(
url,
render_frame_host->GetRenderViewHost()
->GetProcess()
->GetDeprecatedID(),
render_frame_host->GetRoutingID(), traffic_annotation);
params->set_referrer(referrer.url);
params->set_referrer_policy(
content::Referrer::ReferrerPolicyForUrlRequest(referrer.policy));
web_contents()->GetBrowserContext()->GetDownloadManager()->DownloadUrl(
std::move(params));
}
WEB_CONTENTS_USER_DATA_KEY_IMPL(PluginObserver);
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