chrome_frame/policy_settings.cc

   1 // Copyright (c) 2012 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_frame/policy_settings.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/logging.h"
  10 #include "base/strings/string_util.h"
  11 #include "base/strings/utf_string_conversions.h"
  12 #include "base/win/registry.h"
  13 #include "chrome_frame/utils.h"
  14 #include "policy/policy_constants.h"
  15
  16 namespace {
  17
  18 // This array specifies the order in which registry keys are tested.  Do not
  19 // change this unless the decision is made product-wide (i.e., in Chrome's
  20 // configuration policy provider).
  21 const HKEY kRootKeys[] = {
  22   HKEY_LOCAL_MACHINE,
  23   HKEY_CURRENT_USER
  24 };
  25
  26 }  // namespace
  27
  28 PolicySettings::RendererForUrl PolicySettings::GetRendererForUrl(
  29     const wchar_t* url) {
  30   RendererForUrl renderer = default_renderer_;
  31   std::vector<std::wstring>::const_iterator it;
  32   for (it = renderer_exclusion_list_.begin();
  33        it != renderer_exclusion_list_.end(); ++it) {
  34     if (MatchPattern(url, (*it))) {
  35       renderer = (renderer == RENDER_IN_HOST) ?
  36           RENDER_IN_CHROME_FRAME : RENDER_IN_HOST;
  37       break;
  38     }
  39   }
  40   return renderer;
  41 }
  42
  43 PolicySettings::RendererForUrl PolicySettings::GetRendererForContentType(
  44     const wchar_t* content_type) {
  45   DCHECK(content_type);
  46   RendererForUrl renderer = RENDERER_NOT_SPECIFIED;
  47   std::vector<std::wstring>::const_iterator it;
  48   for (it = content_type_list_.begin();
  49        it != content_type_list_.end(); ++it) {
  50     if (lstrcmpiW(content_type, (*it).c_str()) == 0) {
  51       renderer = RENDER_IN_CHROME_FRAME;
  52       break;
  53     }
  54   }
  55   return renderer;
  56 }
  57
  58 const CommandLine& PolicySettings::AdditionalLaunchParameters() const {
  59   return additional_launch_parameters_;
  60 }
  61
  62 // static
  63 void PolicySettings::ReadUrlSettings(
  64     RendererForUrl* default_renderer,
  65     std::vector<std::wstring>* renderer_exclusion_list) {
  66   DCHECK(default_renderer);
  67   DCHECK(renderer_exclusion_list);
  68
  69   *default_renderer = RENDERER_NOT_SPECIFIED;
  70   renderer_exclusion_list->clear();
  71
  72   base::win::RegKey config_key;
  73   DWORD value = RENDERER_NOT_SPECIFIED;
  74   std::wstring settings_value(
  75       ASCIIToWide(policy::key::kChromeFrameRendererSettings));
  76   for (int i = 0; i < arraysize(kRootKeys); ++i) {
  77     if ((config_key.Open(kRootKeys[i], policy::kRegistryChromePolicyKey,
  78                          KEY_READ) == ERROR_SUCCESS) &&
  79         (config_key.ReadValueDW(settings_value.c_str(),
  80                                 &value) == ERROR_SUCCESS)) {
  81         break;
  82     }
  83   }
  84
  85   DCHECK(value == RENDERER_NOT_SPECIFIED ||
  86          value == RENDER_IN_HOST ||
  87          value == RENDER_IN_CHROME_FRAME) <<
  88       "invalid default renderer setting: " << value;
  89
  90   if (value != RENDER_IN_HOST && value != RENDER_IN_CHROME_FRAME) {
  91     DVLOG(1) << "default renderer not specified via policy";
  92   } else {
  93     *default_renderer = static_cast<RendererForUrl>(value);
  94     const char* exclusion_list_name = (*default_renderer == RENDER_IN_HOST) ?
  95         policy::key::kRenderInChromeFrameList :
  96         policy::key::kRenderInHostList;
  97
  98     EnumerateKeyValues(config_key.Handle(),
  99         ASCIIToWide(exclusion_list_name).c_str(), renderer_exclusion_list);
 100
 101     DVLOG(1) << "Default renderer as specified via policy: "
 102              << *default_renderer
 103              << " exclusion list size: " << renderer_exclusion_list->size();
 104   }
 105 }
 106
 107 // static
 108 void PolicySettings::ReadContentTypeSetting(
 109     std::vector<std::wstring>* content_type_list) {
 110   DCHECK(content_type_list);
 111
 112   std::wstring sub_key(policy::kRegistryChromePolicyKey);
 113   sub_key += L"\\";
 114   sub_key += ASCIIToWide(policy::key::kChromeFrameContentTypes);
 115
 116   content_type_list->clear();
 117   for (int i = 0; i < arraysize(kRootKeys) && content_type_list->empty();
 118        ++i) {
 119     EnumerateKeyValues(kRootKeys[i], sub_key.c_str(), content_type_list);
 120   }
 121 }
 122
 123 // static
 124 void PolicySettings::ReadStringSetting(const char* value_name,
 125                                        std::wstring* value) {
 126   DCHECK(value);
 127   value->clear();
 128   base::win::RegKey config_key;
 129   std::wstring value_name_str(ASCIIToWide(value_name));
 130   for (int i = 0; i < arraysize(kRootKeys); ++i) {
 131     if ((config_key.Open(kRootKeys[i], policy::kRegistryChromePolicyKey,
 132                          KEY_READ) == ERROR_SUCCESS) &&
 133         (config_key.ReadValue(value_name_str.c_str(),
 134                               value) == ERROR_SUCCESS)) {
 135       break;
 136     }
 137   }
 138 }
 139
 140 void PolicySettings::RefreshFromRegistry() {
 141   RendererForUrl default_renderer;
 142   std::vector<std::wstring> renderer_exclusion_list;
 143   std::vector<std::wstring> content_type_list;
 144   std::wstring application_locale;
 145   CommandLine additional_launch_parameters(CommandLine::NO_PROGRAM);
 146   std::wstring additional_parameters_str;
 147
 148   // Read the latest settings from the registry
 149   ReadUrlSettings(&default_renderer, &renderer_exclusion_list);
 150   ReadContentTypeSetting(&content_type_list);
 151   ReadStringSetting(policy::key::kApplicationLocaleValue, &application_locale);
 152   ReadStringSetting(policy::key::kAdditionalLaunchParameters,
 153                     &additional_parameters_str);
 154   if (!additional_parameters_str.empty()) {
 155     additional_parameters_str.insert(0, L"fake.exe ");
 156     additional_launch_parameters.ParseFromString(additional_parameters_str);
 157   }
 158
 159   // Nofail swap in the new values.  (Note: this is all that need be protected
 160   // under a mutex if/when this becomes thread safe.)
 161   using std::swap;
 162
 163   swap(default_renderer_, default_renderer);
 164   swap(renderer_exclusion_list_, renderer_exclusion_list);
 165   swap(content_type_list_, content_type_list);
 166   swap(application_locale_, application_locale);
 167   swap(additional_launch_parameters_, additional_launch_parameters);
 168 }
 169
 170 // static
 171 PolicySettings* PolicySettings::GetInstance() {
 172   return Singleton<PolicySettings>::get();
 173 }