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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/browser/script_executor.h"
#include "base/bind.h"
#include "base/callback.h"
#include "base/logging.h"
#include "base/pickle.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_observer.h"
#include "extensions/browser/extension_registry.h"
#include "extensions/browser/script_execution_observer.h"
#include "extensions/common/extension_messages.h"
#include "ipc/ipc_message.h"
#include "ipc/ipc_message_macros.h"
namespace base {
class ListValue;
} // namespace base
namespace extensions {
namespace {
const char* kRendererDestroyed = "The tab was closed.";
// A handler for a single injection request. On creation this will send the
// injection request to the renderer, and it will be destroyed after either the
// corresponding response comes from the renderer, or the renderer is destroyed.
class Handler : public content::WebContentsObserver {
public:
Handler(ObserverList<ScriptExecutionObserver>* script_observers,
content::WebContents* web_contents,
const ExtensionMsg_ExecuteCode_Params& params,
const ScriptExecutor::ExecuteScriptCallback& callback)
: content::WebContentsObserver(web_contents),
script_observers_(AsWeakPtr(script_observers)),
host_id_(params.host_id),
request_id_(params.request_id),
callback_(callback) {
content::RenderViewHost* rvh = web_contents->GetRenderViewHost();
rvh->Send(new ExtensionMsg_ExecuteCode(rvh->GetRoutingID(), params));
}
~Handler() override {}
bool OnMessageReceived(const IPC::Message& message) override {
// Unpack by hand to check the request_id, since there may be multiple
// requests in flight but only one is for this.
if (message.type() != ExtensionHostMsg_ExecuteCodeFinished::ID)
return false;
int message_request_id;
PickleIterator iter(message);
CHECK(iter.ReadInt(&message_request_id));
if (message_request_id != request_id_)
return false;
IPC_BEGIN_MESSAGE_MAP(Handler, message)
IPC_MESSAGE_HANDLER(ExtensionHostMsg_ExecuteCodeFinished,
OnExecuteCodeFinished)
IPC_END_MESSAGE_MAP()
return true;
}
void WebContentsDestroyed() override {
base::ListValue val;
callback_.Run(kRendererDestroyed, GURL(std::string()), val);
delete this;
}
private:
void OnExecuteCodeFinished(int request_id,
const std::string& error,
const GURL& on_url,
const base::ListValue& script_result) {
if (script_observers_.get() && error.empty() &&
host_id_.type() == HostID::EXTENSIONS) {
ScriptExecutionObserver::ExecutingScriptsMap id_map;
id_map[host_id_.id()] = std::set<std::string>();
FOR_EACH_OBSERVER(ScriptExecutionObserver,
*script_observers_,
OnScriptsExecuted(web_contents(), id_map, on_url));
}
callback_.Run(error, on_url, script_result);
delete this;
}
base::WeakPtr<ObserverList<ScriptExecutionObserver> > script_observers_;
HostID host_id_;
int request_id_;
ScriptExecutor::ExecuteScriptCallback callback_;
};
} // namespace
ScriptExecutionObserver::~ScriptExecutionObserver() {
}
ScriptExecutor::ScriptExecutor(
content::WebContents* web_contents,
ObserverList<ScriptExecutionObserver>* script_observers)
: next_request_id_(0),
web_contents_(web_contents),
script_observers_(script_observers) {
CHECK(web_contents_);
}
ScriptExecutor::~ScriptExecutor() {
}
void ScriptExecutor::ExecuteScript(const HostID& host_id,
ScriptExecutor::ScriptType script_type,
const std::string& code,
ScriptExecutor::FrameScope frame_scope,
ScriptExecutor::MatchAboutBlank about_blank,
UserScript::RunLocation run_at,
ScriptExecutor::WorldType world_type,
ScriptExecutor::ProcessType process_type,
const GURL& webview_src,
const GURL& file_url,
bool user_gesture,
ScriptExecutor::ResultType result_type,
const ExecuteScriptCallback& callback) {
if (host_id.type() == HostID::EXTENSIONS) {
// Don't execute if the extension has been unloaded.
const Extension* extension =
ExtensionRegistry::Get(web_contents_->GetBrowserContext())
->enabled_extensions().GetByID(host_id.id());
if (!extension)
return;
} else {
CHECK(process_type == WEB_VIEW_PROCESS);
}
ExtensionMsg_ExecuteCode_Params params;
params.request_id = next_request_id_++;
params.host_id = host_id;
params.is_javascript = (script_type == JAVASCRIPT);
params.code = code;
params.all_frames = (frame_scope == ALL_FRAMES);
params.match_about_blank = (about_blank == MATCH_ABOUT_BLANK);
params.run_at = static_cast<int>(run_at);
params.in_main_world = (world_type == MAIN_WORLD);
params.is_web_view = (process_type == WEB_VIEW_PROCESS);
params.webview_src = webview_src;
params.file_url = file_url;
params.wants_result = (result_type == JSON_SERIALIZED_RESULT);
params.user_gesture = user_gesture;
// Handler handles IPCs and deletes itself on completion.
new Handler(script_observers_, web_contents_, params, callback);
}
} // namespace extensions
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