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/chromeos/drive/drive_pref_names.h"
  12 #include "chrome/browser/download/download_prefs.h"
  13 #include "chrome/browser/policy/policy_path_parser.h"
  14 #include "chrome/common/pref_names.h"
  15 #include "components/policy/core/browser/configuration_policy_handler_parameters.h"
  16 #include "components/policy/core/browser/policy_error_map.h"
  17 #include "components/policy/core/common/policy_map.h"
  18 #include "components/policy/core/common/policy_types.h"
  19 #include "grit/components_strings.h"
  20 #include "policy/policy_constants.h"
  21
  22 #if defined(OS_CHROMEOS)
  23 #include "chrome/browser/chromeos/drive/file_system_core_util.h"
  24 #endif
  25
  26 namespace {
  27 #if defined(OS_CHROMEOS)
  28 const char* kDriveNamePolicyVariableName = "${google_drive}";
  29
  30 // Drive root folder relative to its mount point.
  31 const base::FilePath::CharType* kRootRelativeToDriveMount =
  32     FILE_PATH_LITERAL("root");
  33 #endif
  34 }  // namespace
  35
  36 DownloadDirPolicyHandler::DownloadDirPolicyHandler()
  37     : TypeCheckingPolicyHandler(policy::key::kDownloadDirectory,
  38                                 base::Value::TYPE_STRING) {}
  39
  40 DownloadDirPolicyHandler::~DownloadDirPolicyHandler() {}
  41
  42 bool DownloadDirPolicyHandler::CheckPolicySettings(
  43     const policy::PolicyMap& policies,
  44     policy::PolicyErrorMap* errors) {
  45   const base::Value* value = NULL;
  46   if (!CheckAndGetValue(policies, errors, &value))
  47     return false;
  48
  49 #if defined(OS_CHROMEOS)
  50   // Download directory can only be set as a user policy. If it is set through
  51   // platform policy for a chromeos=1 build, ignore it.
  52   if (value &&
  53       policies.Get(policy_name())->scope != policy::POLICY_SCOPE_USER) {
  54     errors->AddError(policy_name(), IDS_POLICY_SCOPE_ERROR);
  55     return false;
  56   }
  57 #endif
  58
  59   return true;
  60 }
  61
  62 void DownloadDirPolicyHandler::ApplyPolicySettingsWithParameters(
  63     const policy::PolicyMap& policies,
  64     const policy::PolicyHandlerParameters& parameters,
  65     PrefValueMap* prefs) {
  66   const base::Value* value = policies.GetValue(policy_name());
  67   base::FilePath::StringType string_value;
  68   if (!value || !value->GetAsString(&string_value))
  69     return;
  70
  71   base::FilePath::StringType expanded_value;
  72 #if defined(OS_CHROMEOS)
  73   bool download_to_drive = false;
  74   // TODO(kaliamoorthi): Clean up policy::path_parser and fold this code
  75   // into it. http://crbug.com/352627
  76   size_t position = string_value.find(kDriveNamePolicyVariableName);
  77   if (position != base::FilePath::StringType::npos) {
  78     base::FilePath::StringType google_drive_root;
  79     if (!parameters.user_id_hash.empty()) {
  80       google_drive_root = drive::util::GetDriveMountPointPathForUserIdHash(
  81                               parameters.user_id_hash)
  82                               .Append(kRootRelativeToDriveMount)
  83                               .value();
  84       download_to_drive = true;
  85     }
  86     expanded_value = string_value.replace(
  87         position,
  88         base::FilePath::StringType(kDriveNamePolicyVariableName).length(),
  89         google_drive_root);
  90   } else {
  91     expanded_value = string_value;
  92   }
  93 #else
  94   expanded_value = policy::path_parser::ExpandPathVariables(string_value);
  95 #endif
  96   // Make sure the path isn't empty, since that will point to an undefined
  97   // location; the default location is used instead in that case.
  98   // This is checked after path expansion because a non-empty policy value can
  99   // lead to an empty path value after expansion (e.g. "\"\"").
 100   if (expanded_value.empty())
 101     expanded_value = DownloadPrefs::GetDefaultDownloadDirectory().value();
 102   prefs->SetValue(prefs::kDownloadDefaultDirectory,
 103                   make_scoped_ptr(new base::StringValue(expanded_value)));
 104
 105   // If the policy is mandatory, prompt for download should be disabled.
 106   // Otherwise, it would enable a user to bypass the mandatory policy.
 107   if (policies.Get(policy_name())->level == policy::POLICY_LEVEL_MANDATORY) {
 108     prefs->SetBoolean(prefs::kPromptForDownload, false);
 109 #if defined(OS_CHROMEOS)
 110     if (download_to_drive) {
 111       prefs->SetBoolean(drive::prefs::kDisableDrive, false);
 112     }
 113 #endif
 114   }
 115 }
 116
 117 void DownloadDirPolicyHandler::ApplyPolicySettings(
 118     const policy::PolicyMap& /* policies */,
 119     PrefValueMap* /* prefs */) {
 120   NOTREACHED();
 121 }