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// Copyright (c) 2009 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.
#ifndef CHROME_BROWSER_UTILITY_PROCESS_HOST_H_
#define CHROME_BROWSER_UTILITY_PROCESS_HOST_H_
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "base/ref_counted.h"
#include "base/task.h"
#include "chrome/common/child_process_host.h"
#include "chrome/common/ipc_channel.h"
class CommandLine;
class DictionaryValue;
class MessageLoop;
class SkBitmap;
// This class acts as the browser-side host to a utility child process. A
// utility process is a short-lived sandboxed process that is created to run
// a specific task. This class lives solely on the IO thread.
class UtilityProcessHost : public ChildProcessHost {
public:
// An interface to be implemented by consumers of the utility process to
// get results back. All functions are called on the thread passed along
// to UtilityProcessHost.
class Client : public base::RefCountedThreadSafe<Client> {
public:
Client() {}
virtual ~Client() {}
// Called when the process has crashed.
virtual void OnProcessCrashed() {}
// Called when the extension has unpacked successfully. |manifest| is the
// parsed manifest.json file. |images| contains a list of decoded images
// and the associated paths where those images live on disk.
virtual void OnUnpackExtensionSucceeded(
const DictionaryValue& manifest,
const std::vector< Tuple2<SkBitmap, FilePath> >& images) {}
// Called when an error occurred while unpacking the extension.
// |error_message| contains a description of the problem.
virtual void OnUnpackExtensionFailed(const std::string& error_message) {}
private:
friend class UtilityProcessHost;
void OnMessageReceived(const IPC::Message& message);
DISALLOW_COPY_AND_ASSIGN(Client);
};
UtilityProcessHost(ResourceDispatcherHost* rdh, Client* client,
MessageLoop* client_loop);
~UtilityProcessHost();
// Start a process to unpack the extension at the given path. The process
// will be given access to the directory subtree that the extension file is
// in, so the caller is expected to have moved that file into a quarantined
// location first.
bool StartExtensionUnpacker(const FilePath& extension);
private:
// Starts the process. Returns true iff it succeeded.
bool StartProcess(const FilePath& exposed_dir);
// IPC messages:
void OnMessageReceived(const IPC::Message& message);
// ChildProcessHost:
virtual void OnChannelError();
virtual bool CanShutdown() { return true; }
virtual URLRequestContext* GetRequestContext(
uint32 request_id,
const ViewHostMsg_Resource_Request& request_data) {
return NULL;
}
// A pointer to our client interface, who will be informed of progress.
scoped_refptr<Client> client_;
MessageLoop* client_loop_;
DISALLOW_COPY_AND_ASSIGN(UtilityProcessHost);
};
#endif // CHROME_BROWSER_UTILITY_PROCESS_HOST_H_
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