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// Copyright 2014 The Chromium Authors
// 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/mojom/host_id.mojom.h"
#include "extensions/common/permissions/api_permission.h"
#include "extensions/common/permissions/permissions_data.h"
#include "extensions/common/script_constants.h"
#include "extensions/renderer/injection_host.h"
#include "extensions/renderer/renderer_extension_registry.h"
#include "extensions/renderer/script_context.h"
#include "third_party/blink/public/platform/web_string.h"
#include "third_party/blink/public/web/web_document.h"
#include "third_party/blink/public/web/web_local_frame.h"
#include "third_party/blink/public/web/web_script_source.h"
namespace extensions {
ProgrammaticScriptInjector::ProgrammaticScriptInjector(
mojom::ExecuteCodeParamsPtr params,
mojom::LocalFrame::ExecuteCodeCallback callback)
: params_(std::move(params)), callback_(std::move(callback)) {}
ProgrammaticScriptInjector::~ProgrammaticScriptInjector() {
}
mojom::InjectionType ProgrammaticScriptInjector::script_type() const {
return mojom::InjectionType::kProgrammaticScript;
}
blink::mojom::UserActivationOption ProgrammaticScriptInjector::IsUserGesture()
const {
DCHECK(params_->injection->is_js());
return params_->injection->get_js()->user_gesture;
}
mojom::ExecutionWorld ProgrammaticScriptInjector::GetExecutionWorld() const {
DCHECK(params_->injection->is_js());
return params_->injection->get_js()->world;
}
mojom::CSSOrigin ProgrammaticScriptInjector::GetCssOrigin() const {
DCHECK(params_->injection->is_css());
return params_->injection->get_css()->css_origin;
}
mojom::CSSInjection::Operation
ProgrammaticScriptInjector::GetCSSInjectionOperation() const {
DCHECK(params_->injection->is_css());
return params_->injection->get_css()->operation;
}
blink::mojom::WantResultOption ProgrammaticScriptInjector::ExpectsResults()
const {
DCHECK(params_->injection->is_js());
return params_->injection->get_js()->wants_result;
}
blink::mojom::PromiseResultOption
ProgrammaticScriptInjector::ShouldWaitForPromise() const {
DCHECK(params_->injection->is_js());
return params_->injection->get_js()->wait_for_promise;
}
bool ProgrammaticScriptInjector::ShouldInjectJs(
mojom::RunLocation run_location,
const std::set<std::string>& executing_scripts) const {
return params_->run_at == run_location && params_->injection->is_js();
}
bool ProgrammaticScriptInjector::ShouldInjectOrRemoveCss(
mojom::RunLocation run_location,
const std::set<std::string>& injected_stylesheets) const {
return params_->run_at == run_location && params_->injection->is_css();
}
PermissionsData::PageAccess ProgrammaticScriptInjector::CanExecuteOnFrame(
const InjectionHost* injection_host,
blink::WebLocalFrame* frame,
int tab_id) {
// Note: we calculate url_ now and not in the constructor because we don'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::GetDocumentLoaderURLForFrame(frame);
if (url_.SchemeIs(url::kAboutScheme)) {
origin_for_about_error_ = frame->GetSecurityOrigin().ToString().Utf8();
}
GURL effective_document_url =
ScriptContext::GetEffectiveDocumentURLForInjection(
frame, frame->GetDocument().Url(),
params_->match_about_blank
? MatchOriginAsFallbackBehavior::kMatchForAboutSchemeAndClimbTree
: MatchOriginAsFallbackBehavior::kNever);
if (params_->is_web_view) {
if (!frame->IsOutermostMainFrame()) {
// This is a subframe inside <webview>, so allow it.
return PermissionsData::PageAccess::kAllowed;
}
return effective_document_url == params_->webview_src
? PermissionsData::PageAccess::kAllowed
: PermissionsData::PageAccess::kDenied;
}
DCHECK_EQ(injection_host->id().type, mojom::HostID::HostType::kExtensions);
return injection_host->CanExecuteOnFrame(
effective_document_url,
content::RenderFrame::FromWebFrame(frame),
tab_id,
true /* is_declarative */);
}
std::vector<blink::WebScriptSource> ProgrammaticScriptInjector::GetJsSources(
mojom::RunLocation run_location,
std::set<std::string>* executing_scripts,
size_t* num_injected_js_scripts) const {
DCHECK_EQ(params_->run_at, run_location);
DCHECK(params_->injection->is_js());
auto& js_injection = params_->injection->get_js();
std::vector<blink::WebScriptSource> sources;
sources.reserve(js_injection->sources.size());
for (const auto& source : js_injection->sources) {
sources.emplace_back(blink::WebString::FromUTF8(source->code),
source->script_url);
}
return sources;
}
std::vector<ScriptInjector::CSSSource>
ProgrammaticScriptInjector::GetCssSources(
mojom::RunLocation run_location,
std::set<std::string>* injected_stylesheets,
size_t* num_injected_stylesheets) const {
DCHECK_EQ(params_->run_at, run_location);
DCHECK(params_->injection->is_css());
auto& css_injection = params_->injection->get_css();
std::vector<CSSSource> sources;
sources.reserve(css_injection->sources.size());
for (const auto& source : css_injection->sources) {
blink::WebStyleSheetKey style_sheet_key;
if (source->key)
style_sheet_key = blink::WebString::FromASCII(*source->key);
sources.push_back(
CSSSource{blink::WebString::FromUTF8(source->code), style_sheet_key});
}
return sources;
}
void ProgrammaticScriptInjector::OnInjectionComplete(
absl::optional<base::Value> execution_result,
mojom::RunLocation run_location) {
DCHECK(!result_.has_value());
result_ = std::move(execution_result);
Finish(std::string());
}
void ProgrammaticScriptInjector::OnWillNotInject(InjectFailureReason reason) {
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);
}
bool ProgrammaticScriptInjector::CanShowUrlInError() const {
if (params_->host_id->type != mojom::HostID::HostType::kExtensions)
return false;
const Extension* extension =
RendererExtensionRegistry::Get()->GetByID(params_->host_id->id);
if (!extension)
return false;
return extension->permissions_data()->active_permissions().HasAPIPermission(
mojom::APIPermissionID::kTab);
}
void ProgrammaticScriptInjector::Finish(const std::string& error) {
DCHECK(!finished_);
finished_ = true;
if (callback_)
std::move(callback_).Run(error, url_, std::move(result_));
}
} // namespace extensions
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