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// Copyright (c) 2012 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_EXTENSIONS_API_MESSAGING_NATIVE_PROCESS_LAUNCHER_H_
#define CHROME_BROWSER_EXTENSIONS_API_MESSAGING_NATIVE_PROCESS_LAUNCHER_H_
#include <memory>
#include "base/callback_forward.h"
#include "base/files/file.h"
#include "base/macros.h"
#include "base/process/process.h"
#include "ui/gfx/native_widget_types.h"
class GURL;
namespace base {
class CommandLine;
class FilePath;
}
namespace extensions {
class NativeProcessLauncher {
public:
enum LaunchResult {
RESULT_SUCCESS,
RESULT_INVALID_NAME,
RESULT_NOT_FOUND,
RESULT_FORBIDDEN,
RESULT_FAILED_TO_START,
};
// Callback that's called after the process has been launched. |result| is set
// to false in case of a failure. Handler must take ownership of the IO
// handles.
typedef base::Callback<void(LaunchResult result,
base::Process process,
base::File read_file,
base::File write_file)> LaunchedCallback;
// Creates default launcher for the current OS. |native_view| refers to the
// window that contains calling page. Can be nullptr, e.g. for background
// pages.
static std::unique_ptr<NativeProcessLauncher> CreateDefault(
bool allow_user_level_hosts,
gfx::NativeView native_view);
NativeProcessLauncher() {}
virtual ~NativeProcessLauncher() {}
// Finds native messaging host with the specified name and launches it
// asynchronously. Also checks that the specified |origin| is permitted to
// access the host. |callback| is called after the process has been started.
// If the launcher is destroyed before the callback is called then the call is
// canceled and the process is stopped if it has been started already (by
// closing IO pipes).
virtual void Launch(const GURL& origin,
const std::string& native_host_name,
const LaunchedCallback& callback) const = 0;
protected:
// The following two methods are platform specific and are implemented in
// platform-specific .cc files.
// Finds manifest file for the native messaging host |native_host_name|.
// |user_level| is set to true if the manifest is installed on user level.
// Returns an empty path if the host with the specified name cannot be found.
static base::FilePath FindManifest(const std::string& native_host_name,
bool allow_user_level_hosts,
std::string* error_message);
// Launches native messaging process.
static bool LaunchNativeProcess(const base::CommandLine& command_line,
base::Process* process,
base::File* read_file,
base::File* write_file);
private:
DISALLOW_COPY_AND_ASSIGN(NativeProcessLauncher);
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_API_MESSAGING_NATIVE_PROCESS_LAUNCHER_H_
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