162 lines
6.2 KiB
C++
162 lines
6.2 KiB
C++
// Copyright (c) 2015 The Chromium Embedded Framework Authors. All rights
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// reserved. Use of this source code is governed by a BSD-style license that can
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// be found in the LICENSE file.
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#include "libcef/browser/plugins/plugin_service_filter.h"
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#include "include/cef_request_context_handler.h"
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#include "libcef/browser/browser_host_impl.h"
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#include "libcef/browser/resource_context.h"
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#include "libcef/browser/thread_util.h"
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#include "libcef/browser/web_plugin_impl.h"
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#include "libcef/common/content_client.h"
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#include "extensions/common/constants.h"
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CefPluginServiceFilter::CefPluginServiceFilter() {}
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bool CefPluginServiceFilter::IsPluginAvailable(
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int render_process_id,
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int render_frame_id,
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const void* context,
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const GURL& url,
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bool is_main_frame,
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const url::Origin& main_frame_origin,
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content::WebPluginInfo* plugin) {
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// With PlzNavigate this can be called before the renderer process exists.
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if (render_process_id < 0)
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return true;
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CefResourceContext* resource_context = const_cast<CefResourceContext*>(
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reinterpret_cast<const CefResourceContext*>(context));
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chrome::mojom::PluginStatus status = chrome::mojom::PluginStatus::kAllowed;
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// Perform origin check here because we're passing an empty origin value to
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// IsPluginAvailable() below.
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const GURL& policy_url = main_frame_origin.GetURL();
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if (!policy_url.is_empty() &&
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policy_url.scheme() == extensions::kExtensionScheme) {
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// Always allow extension origins to load plugins.
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// TODO(extensions): Revisit this decision once CEF supports more than just
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// the PDF extension.
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return true;
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}
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// Blink requires this method to return a consistent value during renderer
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// process initialization and page load, so we always call IsPluginAvailable()
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// with an empty origin. If we return false then the plugin will not be listed
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// in navigator.plugins and navigating to the plugin mime type will trigger
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// the download code path. If we return true then individual plugin instance
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// loads will be evaluated in CefContentRendererClient::OverrideCreatePlugin,
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// which will result in a call to CefPluginInfoMessageFilter::PluginsLoaded to
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// retrieve the actual load decision with a non-empty origin. That will
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// determine whether the plugin load is allowed or the plugin placeholder is
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// displayed.
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return IsPluginAvailable(render_process_id, render_frame_id, resource_context,
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url, is_main_frame, url::Origin(), plugin, &status);
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}
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bool CefPluginServiceFilter::CanLoadPlugin(int render_process_id,
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const base::FilePath& path) {
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return true;
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}
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bool CefPluginServiceFilter::IsPluginAvailable(
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int render_process_id,
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int render_frame_id,
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content::ResourceContext* content_resource_context,
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const GURL& url,
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bool is_main_frame,
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const url::Origin& main_frame_origin,
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content::WebPluginInfo* plugin,
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chrome::mojom::PluginStatus* status) {
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CefResourceContext* resource_context =
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static_cast<CefResourceContext*>(content_resource_context);
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if (*status == chrome::mojom::PluginStatus::kNotFound) {
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// The plugin does not exist so no need to query the handler.
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return false;
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}
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if (plugin->path == CefString(CefContentClient::kPDFPluginPath)) {
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// Always allow the internal PDF plugin to load.
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*status = chrome::mojom::PluginStatus::kAllowed;
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return true;
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}
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const GURL& policy_url = main_frame_origin.GetURL();
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if (!policy_url.is_empty() &&
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policy_url.scheme() == extensions::kExtensionScheme) {
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// Always allow extension origins to load plugins.
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// TODO(extensions): Revisit this decision once CEF supports more than just
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// the PDF extension.
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*status = chrome::mojom::PluginStatus::kAllowed;
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return true;
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}
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CefRefPtr<CefRequestContextHandler> handler = resource_context->GetHandler();
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if (!handler) {
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// No handler so go with the default plugin load decision.
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return *status != chrome::mojom::PluginStatus::kDisabled;
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}
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// Check for a cached plugin load decision.
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if (resource_context->HasPluginLoadDecision(render_process_id, plugin->path,
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is_main_frame, main_frame_origin,
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status)) {
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return *status != chrome::mojom::PluginStatus::kDisabled;
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}
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CefRefPtr<CefWebPluginInfoImpl> pluginInfo(new CefWebPluginInfoImpl(*plugin));
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cef_plugin_policy_t plugin_policy = PLUGIN_POLICY_ALLOW;
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switch (*status) {
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case chrome::mojom::PluginStatus::kAllowed:
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plugin_policy = PLUGIN_POLICY_ALLOW;
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break;
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case chrome::mojom::PluginStatus::kBlocked:
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case chrome::mojom::PluginStatus::kBlockedByPolicy:
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case chrome::mojom::PluginStatus::kOutdatedBlocked:
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case chrome::mojom::PluginStatus::kOutdatedDisallowed:
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case chrome::mojom::PluginStatus::kUnauthorized:
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plugin_policy = PLUGIN_POLICY_BLOCK;
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break;
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case chrome::mojom::PluginStatus::kDisabled:
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plugin_policy = PLUGIN_POLICY_DISABLE;
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break;
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case chrome::mojom::PluginStatus::kPlayImportantContent:
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plugin_policy = PLUGIN_POLICY_DETECT_IMPORTANT;
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break;
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default:
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NOTREACHED();
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break;
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}
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if (handler->OnBeforePluginLoad(plugin->mime_types[0].mime_type,
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url.possibly_invalid_spec(), is_main_frame,
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policy_url.possibly_invalid_spec(),
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pluginInfo.get(), &plugin_policy)) {
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switch (plugin_policy) {
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case PLUGIN_POLICY_ALLOW:
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*status = chrome::mojom::PluginStatus::kAllowed;
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break;
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case PLUGIN_POLICY_DETECT_IMPORTANT:
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*status = chrome::mojom::PluginStatus::kPlayImportantContent;
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break;
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case PLUGIN_POLICY_BLOCK:
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*status = chrome::mojom::PluginStatus::kBlocked;
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break;
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case PLUGIN_POLICY_DISABLE:
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*status = chrome::mojom::PluginStatus::kDisabled;
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break;
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}
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}
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// Cache the plugin load decision.
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resource_context->AddPluginLoadDecision(render_process_id, plugin->path,
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is_main_frame, main_frame_origin,
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*status);
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return *status != chrome::mojom::PluginStatus::kDisabled;
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}
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