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// Copyright 2014 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 "extensions/renderer/programmatic_script_injector.h"
#include <utility>
#include <vector>
#include "base/values.h"
#include "content/public/common/url_constants.h"
#include "content/public/renderer/render_frame.h"
#include "extensions/common/error_utils.h"
#include "extensions/common/extension_messages.h"
#include "extensions/common/manifest_constants.h"
#include "extensions/common/permissions/api_permission.h"
#include "extensions/common/permissions/permissions_data.h"
#include "extensions/renderer/injection_host.h"
#include "extensions/renderer/renderer_extension_registry.h"
#include "extensions/renderer/script_context.h"
#include "third_party/WebKit/public/platform/WebString.h"
#include "third_party/WebKit/public/web/WebDocument.h"
#include "third_party/WebKit/public/web/WebLocalFrame.h"
#include "third_party/WebKit/public/web/WebScriptSource.h"
namespace extensions {
ProgrammaticScriptInjector::ProgrammaticScriptInjector(
const ExtensionMsg_ExecuteCode_Params& params)
: params_(new ExtensionMsg_ExecuteCode_Params(params)),
finished_(false) {
}
ProgrammaticScriptInjector::~ProgrammaticScriptInjector() {
}
UserScript::InjectionType ProgrammaticScriptInjector::script_type()
const {
return UserScript::PROGRAMMATIC_SCRIPT;
}
bool ProgrammaticScriptInjector::ShouldExecuteInMainWorld() const {
return params_->in_main_world;
}
bool ProgrammaticScriptInjector::IsUserGesture() const {
return params_->user_gesture;
}
bool ProgrammaticScriptInjector::ExpectsResults() const {
return params_->wants_result;
}
bool ProgrammaticScriptInjector::ShouldInjectJs(
UserScript::RunLocation run_location,
const std::set<std::string>& executing_scripts) const {
return GetRunLocation() == run_location && params_->is_javascript;
}
bool ProgrammaticScriptInjector::ShouldInjectCss(
UserScript::RunLocation run_location,
const std::set<std::string>& injected_stylesheets) const {
return GetRunLocation() == run_location && !params_->is_javascript;
}
PermissionsData::AccessType ProgrammaticScriptInjector::CanExecuteOnFrame(
const InjectionHost* injection_host,
blink::WebLocalFrame* frame,
int tab_id) {
// Note: we calculate url_ now and not in the constructor because with
// PlzNavigate we won't have the URL at that point when loads start. The
// browser issues the request and only when it has a response does the
// renderer see the provisional data source which the method below uses.
url_ = ScriptContext::GetDataSourceURLForFrame(frame);
if (url_.SchemeIs(url::kAboutScheme)) {
origin_for_about_error_ = frame->getSecurityOrigin().toString().utf8();
}
GURL effective_document_url = ScriptContext::GetEffectiveDocumentURL(
frame, frame->document().url(), params_->match_about_blank);
if (params_->is_web_view) {
if (frame->parent()) {
// This is a subframe inside <webview>, so allow it.
return PermissionsData::ACCESS_ALLOWED;
}
return effective_document_url == params_->webview_src
? PermissionsData::ACCESS_ALLOWED
: PermissionsData::ACCESS_DENIED;
}
DCHECK_EQ(injection_host->id().type(), HostID::EXTENSIONS);
return injection_host->CanExecuteOnFrame(
effective_document_url,
content::RenderFrame::FromWebFrame(frame),
tab_id,
true /* is_declarative */);
}
std::vector<blink::WebScriptSource> ProgrammaticScriptInjector::GetJsSources(
UserScript::RunLocation run_location,
std::set<std::string>* executing_scripts,
size_t* num_injected_js_scripts) const {
DCHECK_EQ(GetRunLocation(), run_location);
DCHECK(params_->is_javascript);
return std::vector<blink::WebScriptSource>(
1,
blink::WebScriptSource(
blink::WebString::fromUTF8(params_->code), params_->file_url));
}
std::vector<blink::WebString> ProgrammaticScriptInjector::GetCssSources(
UserScript::RunLocation run_location,
std::set<std::string>* injected_stylesheets,
size_t* num_injected_stylesheets) const {
DCHECK_EQ(GetRunLocation(), run_location);
DCHECK(!params_->is_javascript);
return std::vector<blink::WebString>(
1, blink::WebString::fromUTF8(params_->code));
}
void ProgrammaticScriptInjector::OnInjectionComplete(
std::unique_ptr<base::Value> execution_result,
UserScript::RunLocation run_location,
content::RenderFrame* render_frame) {
DCHECK(results_.empty());
if (execution_result)
results_.Append(std::move(execution_result));
Finish(std::string(), render_frame);
}
void ProgrammaticScriptInjector::OnWillNotInject(
InjectFailureReason reason,
content::RenderFrame* render_frame) {
std::string error;
switch (reason) {
case NOT_ALLOWED:
if (!CanShowUrlInError()) {
error = manifest_errors::kCannotAccessPage;
} else if (!origin_for_about_error_.empty()) {
error = ErrorUtils::FormatErrorMessage(
manifest_errors::kCannotAccessAboutUrl, url_.spec(),
origin_for_about_error_);
} else {
error = ErrorUtils::FormatErrorMessage(
manifest_errors::kCannotAccessPageWithUrl, url_.spec());
}
break;
case EXTENSION_REMOVED: // no special error here.
case WONT_INJECT:
break;
}
Finish(error, render_frame);
}
bool ProgrammaticScriptInjector::CanShowUrlInError() const {
if (params_->host_id.type() != HostID::EXTENSIONS)
return false;
const Extension* extension =
RendererExtensionRegistry::Get()->GetByID(params_->host_id.id());
if (!extension)
return false;
return extension->permissions_data()->active_permissions().HasAPIPermission(
APIPermission::kTab);
}
UserScript::RunLocation ProgrammaticScriptInjector::GetRunLocation() const {
return static_cast<UserScript::RunLocation>(params_->run_at);
}
void ProgrammaticScriptInjector::Finish(const std::string& error,
content::RenderFrame* render_frame) {
DCHECK(!finished_);
finished_ = true;
// It's possible that the render frame was destroyed in the course of
// injecting scripts. Don't respond if it was (the browser side watches for
// frame deletions so nothing is left hanging).
if (render_frame) {
render_frame->Send(
new ExtensionHostMsg_ExecuteCodeFinished(
render_frame->GetRoutingID(), params_->request_id,
error, url_, results_));
}
}
} // namespace extensions
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