Mac: Give app_shim code a nicer home

apps/app_shim/app_shim_host_manager_mac.mm

-// Copyright 2013 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 "apps/app_shim/app_shim_host_manager_mac.h"
-
-#include <unistd.h>
-
-#include "apps/app_shim/app_shim_handler_mac.h"
-#include "apps/app_shim/app_shim_host_mac.h"
-#include "base/base64.h"
-#include "base/bind.h"
-#include "base/command_line.h"
-#include "base/files/file_path.h"
-#include "base/files/file_util.h"
-#include "base/logging.h"
-#include "base/path_service.h"
-#include "base/sha1.h"
-#include "base/strings/string_util.h"
-#include "chrome/browser/browser_process.h"
-#include "chrome/common/chrome_paths.h"
-#include "chrome/common/chrome_switches.h"
-#include "chrome/common/chrome_version_info.h"
-#include "chrome/common/mac/app_mode_common.h"
-
-using content::BrowserThread;
-
-namespace {
-
-void CreateAppShimHost(const IPC::ChannelHandle& handle) {
-  // AppShimHost takes ownership of itself.
-  (new AppShimHost)->ServeChannel(handle);
-}
-
-base::FilePath GetDirectoryInTmpTemplate(const base::FilePath& user_data_dir) {
-  base::FilePath temp_dir;
-  CHECK(PathService::Get(base::DIR_TEMP, &temp_dir));
-  // Check that it's shorter than the IPC socket length (104) minus the
-  // intermediate folder ("/chrome-XXXXXX/") and kAppShimSocketShortName.
-  DCHECK_GT(83u, temp_dir.value().length());
-  return temp_dir.Append("chrome-XXXXXX");
-}
-
-void DeleteSocketFiles(const base::FilePath& directory_in_tmp,
-                       const base::FilePath& symlink_path,
-                       const base::FilePath& version_path) {
-  // Delete in reverse order of creation.
-  if (!version_path.empty())
-    base::DeleteFile(version_path, false);
-  if (!symlink_path.empty())
-    base::DeleteFile(symlink_path, false);
-  if (!directory_in_tmp.empty())
-    base::DeleteFile(directory_in_tmp, true);
-}
-
-}  // namespace
-
-AppShimHostManager::AppShimHostManager()
-    : did_init_(false) {}
-
-void AppShimHostManager::Init() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  DCHECK(!did_init_);
-  did_init_ = true;
-  apps::AppShimHandler::SetDefaultHandler(&extension_app_shim_handler_);
-  BrowserThread::PostTask(
-      BrowserThread::FILE, FROM_HERE,
-      base::Bind(&AppShimHostManager::InitOnFileThread, this));
-}
-
-AppShimHostManager::~AppShimHostManager() {
-  acceptor_.reset();
-  if (!did_init_)
-    return;
-
-  apps::AppShimHandler::SetDefaultHandler(NULL);
-  base::FilePath user_data_dir;
-  base::FilePath symlink_path;
-  base::FilePath version_path;
-  if (PathService::Get(chrome::DIR_USER_DATA, &user_data_dir)) {
-    symlink_path = user_data_dir.Append(app_mode::kAppShimSocketSymlinkName);
-    version_path =
-        user_data_dir.Append(app_mode::kRunningChromeVersionSymlinkName);
-  }
-  BrowserThread::PostTask(
-      BrowserThread::FILE,
-      FROM_HERE,
-      base::Bind(
-          &DeleteSocketFiles, directory_in_tmp_, symlink_path, version_path));
-}
-
-void AppShimHostManager::InitOnFileThread() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
-  base::FilePath user_data_dir;
-  if (!PathService::Get(chrome::DIR_USER_DATA, &user_data_dir))
-    return;
-
-  // The socket path must be shorter than 104 chars (IPC::kMaxSocketNameLength).
-  // To accommodate this, we use a short path in /tmp/ that is generated from a
-  // hash of the user data dir.
-  std::string directory_string =
-      GetDirectoryInTmpTemplate(user_data_dir).value();
-
-  // mkdtemp() replaces trailing X's randomly and creates the directory.
-  if (!mkdtemp(&directory_string[0])) {
-    PLOG(ERROR) << directory_string;
-    return;
-  }
-
-  directory_in_tmp_ = base::FilePath(directory_string);
-  // Check that the directory was created with the correct permissions.
-  int dir_mode = 0;
-  if (!base::GetPosixFilePermissions(directory_in_tmp_, &dir_mode) ||
-      dir_mode != base::FILE_PERMISSION_USER_MASK) {
-    NOTREACHED();
-    return;
-  }
-
-  // UnixDomainSocketAcceptor creates the socket immediately.
-  base::FilePath socket_path =
-      directory_in_tmp_.Append(app_mode::kAppShimSocketShortName);
-  acceptor_.reset(new apps::UnixDomainSocketAcceptor(socket_path, this));
-
-  // Create a symlink to the socket in the user data dir. This lets the shim
-  // process started from Finder find the actual socket path by following the
-  // symlink with ::readlink().
-  base::FilePath symlink_path =
-      user_data_dir.Append(app_mode::kAppShimSocketSymlinkName);
-  base::DeleteFile(symlink_path, false);
-  base::CreateSymbolicLink(socket_path, symlink_path);
-
-  // Create a symlink containing the current version string. This allows the
-  // shim to load the same framework version as the currently running Chrome
-  // process.
-  base::FilePath version_path =
-      user_data_dir.Append(app_mode::kRunningChromeVersionSymlinkName);
-  base::DeleteFile(version_path, false);
-  base::CreateSymbolicLink(base::FilePath(chrome::VersionInfo().Version()),
-                           version_path);
-
-  BrowserThread::PostTask(
-      BrowserThread::IO, FROM_HERE,
-      base::Bind(&AppShimHostManager::ListenOnIOThread, this));
-}
-
-void AppShimHostManager::ListenOnIOThread() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
-  if (!acceptor_->Listen()) {
-    BrowserThread::PostTask(
-        BrowserThread::UI, FROM_HERE,
-        base::Bind(&AppShimHostManager::OnListenError, this));
-  }
-}
-
-void AppShimHostManager::OnClientConnected(
-    const IPC::ChannelHandle& handle) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
-  BrowserThread::PostTask(
-      BrowserThread::UI, FROM_HERE,
-      base::Bind(&CreateAppShimHost, handle));
-}
-
-void AppShimHostManager::OnListenError() {
-  // TODO(tapted): Set a timeout and attempt to reconstruct the channel. Until
-  // cases where the error could occur are better known, just reset the acceptor
-  // to allow failure to be communicated via the test API.
-  acceptor_.reset();
-}