/**************************************************************************** ** ** Copyright (C) 2019 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the QtWebEngine module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License version 3 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL3 included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 3 requirements ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License version 2.0 or (at your option) the GNU General ** Public license version 3 or any later version approved by the KDE Free ** Qt Foundation. The licenses are as published by the Free Software ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 ** included in the packaging of this file. Please review the following ** information to ensure the GNU General Public License requirements will ** be met: https://www.gnu.org/licenses/gpl-2.0.html and ** https://www.gnu.org/licenses/gpl-3.0.html. ** ** $QT_END_LICENSE$ ** ****************************************************************************/ // based on chrome/browser/plugins/plugin_response_interceptor_url_loader_throttle.cc // Copyright 2018 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 "plugin_response_interceptor_url_loader_throttle.h" #include "base/bind.h" #include "base/guid.h" #include "base/task/post_task.h" #include "chrome/browser/extensions/api/streams_private/streams_private_api.h" #include "content/public/browser/browser_context.h" #include "content/public/browser/browser_thread.h" #include "content/public/browser/download_manager.h" #include "content/public/browser/download_request_utils.h" #include "content/public/browser/download_utils.h" #include "extensions/browser/guest_view/mime_handler_view/mime_handler_view_attach_helper.h" #include "extensions/common/constants.h" #include "extensions/common/extension.h" #include "extensions/common/manifest_handlers/mime_types_handler.h" #include "third_party/blink/public/mojom/loader/transferrable_url_loader.mojom.h" #include "extensions/extension_system_qt.h" #include "web_contents_delegate_qt.h" #include "web_engine_settings.h" #include namespace QtWebEngineCore { PluginResponseInterceptorURLLoaderThrottle::PluginResponseInterceptorURLLoaderThrottle( content::BrowserContext *browser_context, network::mojom::RequestDestination request_destination, int frame_tree_node_id) : m_browser_context(browser_context), m_request_destination(request_destination), m_frame_tree_node_id(frame_tree_node_id) {} void PluginResponseInterceptorURLLoaderThrottle::WillProcessResponse(const GURL &response_url, network::mojom::URLResponseHead *response_head, bool *defer) { DCHECK_CURRENTLY_ON(content::BrowserThread::UI); if (content::download_utils::MustDownload(response_url, response_head->headers.get(), response_head->mime_type)) return; content::WebContents *web_contents = content::WebContents::FromFrameTreeNodeId(m_frame_tree_node_id); if (!web_contents) return; std::string extension_id; if (response_head->mime_type == "application/pdf") extension_id = extension_misc::kPdfExtensionId; if (extension_id.empty()) return; WebContentsDelegateQt *contentsDelegate = static_cast(web_contents->GetDelegate()); if (!contentsDelegate) return; WebEngineSettings *settings = contentsDelegate->webEngineSettings(); if (!settings->testAttribute(QWebEngineSettings::PdfViewerEnabled) || !settings->testAttribute(QWebEngineSettings::PluginsEnabled)) { // PluginServiceFilterQt will inform the URLLoader about the disabled state of plugins // and we can expect the download to be triggered automatically. It's unnecessary to // go further and start the guest view embedding process. return; } // Chrome's PDF Extension does not work properly in the face of a restrictive // Content-Security-Policy, and does not currently respect the policy anyway. // Ignore CSP served on a PDF response. https://crbug.com/271452 if (extension_id == extension_misc::kPdfExtensionId && response_head->headers) response_head->headers->RemoveHeader("Content-Security-Policy"); MimeTypesHandler::ReportUsedHandler(extension_id); std::string view_id = base::GenerateGUID(); // The string passed down to the original client with the response body. std::string payload = view_id; mojo::PendingRemote dummy_new_loader; ignore_result(dummy_new_loader.InitWithNewPipeAndPassReceiver()); mojo::Remote new_client; mojo::PendingReceiver new_client_receiver = new_client.BindNewPipeAndPassReceiver(); uint32_t data_pipe_size = 64U; // Provide the MimeHandlerView code a chance to override the payload. This is // the case where the resource is handled by frame-based MimeHandlerView. *defer = extensions::MimeHandlerViewAttachHelper::OverrideBodyForInterceptedResponse( m_frame_tree_node_id, response_url, response_head->mime_type, view_id, &payload, &data_pipe_size, base::BindOnce( &PluginResponseInterceptorURLLoaderThrottle::ResumeLoad, weak_factory_.GetWeakPtr())); mojo::ScopedDataPipeProducerHandle producer_handle; mojo::ScopedDataPipeConsumerHandle consumer_handle; CHECK_EQ(MOJO_RESULT_OK, mojo::CreateDataPipe(data_pipe_size, producer_handle, consumer_handle)); uint32_t len = static_cast(payload.size()); CHECK_EQ(MOJO_RESULT_OK, producer_handle->WriteData( payload.c_str(), &len, MOJO_WRITE_DATA_FLAG_ALL_OR_NONE)); new_client->OnStartLoadingResponseBody(std::move(consumer_handle)); network::URLLoaderCompletionStatus status(net::OK); status.decoded_body_length = len; new_client->OnComplete(status); mojo::PendingRemote original_loader; mojo::PendingReceiver original_client; delegate_->InterceptResponse(std::move(dummy_new_loader), std::move(new_client_receiver), &original_loader, &original_client); // Make a deep copy of URLResponseHead before passing it cross-thread. auto deep_copied_response = response_head->Clone(); if (response_head->headers) { deep_copied_response->headers = base::MakeRefCounted( response_head->headers->raw_headers()); } auto transferrable_loader = blink::mojom::TransferrableURLLoader::New(); transferrable_loader->url = GURL( extensions::Extension::GetBaseURLFromExtensionId(extension_id).spec() + base::GenerateGUID()); transferrable_loader->url_loader = std::move(original_loader); transferrable_loader->url_loader_client = std::move(original_client); transferrable_loader->head = std::move(deep_copied_response); transferrable_loader->head->intercepted_by_plugin = true; bool embedded = m_request_destination != network::mojom::RequestDestination::kDocument; content::GetUIThreadTaskRunner({})->PostTask( FROM_HERE, base::BindOnce( &extensions::StreamsPrivateAPI::SendExecuteMimeTypeHandlerEvent, extension_id, view_id, embedded, m_frame_tree_node_id, -1 /* render_process_id */, -1 /* render_frame_id */, std::move(transferrable_loader), response_url)); } void PluginResponseInterceptorURLLoaderThrottle::ResumeLoad() { delegate_->Resume(); } } // namespace QtWebEngineCore