chrome/browser/download/download_dir_policy_handler.cc

   1 // Copyright 2013 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 "chrome/browser/download/download_dir_policy_handler.h"
   6
   7 #include "base/files/file_path.h"
   8 #include "base/memory/scoped_ptr.h"
   9 #include "base/prefs/pref_value_map.h"
  10 #include "base/values.h"
  11 #include "chrome/browser/download/download_prefs.h"
  12 #include "chrome/browser/policy/policy_path_parser.h"
  13 #include "chrome/common/pref_names.h"
  14 #include "components/policy/core/browser/configuration_policy_handler_parameters.h"
  15 #include "components/policy/core/browser/policy_error_map.h"
  16 #include "components/policy/core/common/policy_map.h"
  17 #include "components/policy/core/common/policy_types.h"
  18 #include "grit/components_strings.h"
  19 #include "policy/policy_constants.h"
  20
  21 #if defined(OS_CHROMEOS)
  22 #include "chrome/browser/chromeos/drive/file_system_util.h"
  23 #endif
  24
  25 namespace {
  26 #if defined(OS_CHROMEOS)
  27 const char* kDriveNamePolicyVariableName = "${google_drive}";
  28
  29 // Drive root folder relative to its mount point.
  30 const base::FilePath::CharType* kRootRelativeToDriveMount =
  31     FILE_PATH_LITERAL("root");
  32 #endif
  33 }  // namespace
  34
  35 DownloadDirPolicyHandler::DownloadDirPolicyHandler()
  36     : TypeCheckingPolicyHandler(policy::key::kDownloadDirectory,
  37                                 base::Value::TYPE_STRING) {}
  38
  39 DownloadDirPolicyHandler::~DownloadDirPolicyHandler() {}
  40
  41 bool DownloadDirPolicyHandler::CheckPolicySettings(
  42     const policy::PolicyMap& policies,
  43     policy::PolicyErrorMap* errors) {
  44   const base::Value* value = NULL;
  45   if (!CheckAndGetValue(policies, errors, &value))
  46     return false;
  47
  48 #if defined(OS_CHROMEOS)
  49   // Download directory can only be set as a user policy. If it is set through
  50   // platform policy for a chromeos=1 build, ignore it.
  51   if (value &&
  52       policies.Get(policy_name())->scope != policy::POLICY_SCOPE_USER) {
  53     errors->AddError(policy_name(), IDS_POLICY_SCOPE_ERROR);
  54     return false;
  55   }
  56 #endif
  57
  58   return true;
  59 }
  60
  61 void DownloadDirPolicyHandler::ApplyPolicySettingsWithParameters(
  62     const policy::PolicyMap& policies,
  63     const policy::PolicyHandlerParameters& parameters,
  64     PrefValueMap* prefs) {
  65   const base::Value* value = policies.GetValue(policy_name());
  66   base::FilePath::StringType string_value;
  67   if (!value || !value->GetAsString(&string_value))
  68     return;
  69
  70   base::FilePath::StringType expanded_value;
  71 #if defined(OS_CHROMEOS)
  72   bool download_to_drive = false;
  73   // TODO(kaliamoorthi): Clean up policy::path_parser and fold this code
  74   // into it. http://crbug.com/352627
  75   size_t position = string_value.find(kDriveNamePolicyVariableName);
  76   if (position != base::FilePath::StringType::npos) {
  77     base::FilePath::StringType google_drive_root;
  78     if (!parameters.user_id_hash.empty()) {
  79       google_drive_root = drive::util::GetDriveMountPointPathForUserIdHash(
  80                               parameters.user_id_hash)
  81                               .Append(kRootRelativeToDriveMount)
  82                               .value();
  83       download_to_drive = true;
  84     }
  85     expanded_value = string_value.replace(
  86         position,
  87         base::FilePath::StringType(kDriveNamePolicyVariableName).length(),
  88         google_drive_root);
  89   } else {
  90     expanded_value = string_value;
  91   }
  92 #else
  93   expanded_value = policy::path_parser::ExpandPathVariables(string_value);
  94 #endif
  95   // Make sure the path isn't empty, since that will point to an undefined
  96   // location; the default location is used instead in that case.
  97   // This is checked after path expansion because a non-empty policy value can
  98   // lead to an empty path value after expansion (e.g. "\"\"").
  99   if (expanded_value.empty())
 100     expanded_value = DownloadPrefs::GetDefaultDownloadDirectory().value();
 101   prefs->SetValue(prefs::kDownloadDefaultDirectory,
 102                   new base::StringValue(expanded_value));
 103
 104   // If the policy is mandatory, prompt for download should be disabled.
 105   // Otherwise, it would enable a user to bypass the mandatory policy.
 106   if (policies.Get(policy_name())->level == policy::POLICY_LEVEL_MANDATORY) {
 107     prefs->SetValue(prefs::kPromptForDownload,
 108                     new base::FundamentalValue(false));
 109 #if defined(OS_CHROMEOS)
 110     if (download_to_drive) {
 111       prefs->SetValue(prefs::kDisableDrive,
 112                       new base::FundamentalValue(false));
 113     }
 114 #endif
 115   }
 116 }