webkit/chromeos/fileapi/file_access_permissions.cc

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "webkit/chromeos/fileapi/file_access_permissions.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/logging.h"
   9
  10 namespace chromeos {
  11
  12 FileAccessPermissions::FileAccessPermissions() {}
  13
  14 FileAccessPermissions::~FileAccessPermissions() {}
  15
  16
  17 void FileAccessPermissions::GrantAccessPermission(
  18     const std::string& extension_id, const FilePath& path) {
  19   base::AutoLock locker(lock_);
  20   PathAccessMap::iterator path_map_iter = path_map_.find(extension_id);
  21   if (path_map_iter == path_map_.end()) {
  22     PathSet path_set;
  23     path_set.insert(path);
  24     path_map_.insert(PathAccessMap::value_type(extension_id, path_set));
  25   } else {
  26     if (path_map_iter->second.find(path) != path_map_iter->second.end())
  27       return;
  28     path_map_iter->second.insert(path);
  29   }
  30 }
  31
  32 bool FileAccessPermissions::HasAccessPermission(
  33     const std::string& extension_id, const FilePath& path) {
  34   base::AutoLock locker(lock_);
  35   PathAccessMap::const_iterator path_map_iter = path_map_.find(extension_id);
  36   if (path_map_iter == path_map_.end())
  37     return false;
  38
  39   // Check this file and walk up its directory tree to find if this extension
  40   // has access to it.
  41   FilePath current_path = path.StripTrailingSeparators();
  42   FilePath last_path;
  43   while (current_path != last_path) {
  44     if (path_map_iter->second.find(current_path) != path_map_iter->second.end())
  45       return true;
  46     last_path = current_path;
  47     current_path = current_path.DirName();
  48   }
  49   return false;
  50 }
  51
  52 void FileAccessPermissions::RevokePermissions(
  53     const std::string& extension_id) {
  54   base::AutoLock locker(lock_);
  55   path_map_.erase(extension_id);
  56 }
  57
  58 }