src/chrome/browser/content_settings/content_settings_utils.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/browser/content_settings/content_settings_utils.h"
   6
   7 #include <vector>
   8
   9 #include "base/command_line.h"
  10 #include "base/logging.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/memory/scoped_vector.h"
  13 #include "base/strings/string_split.h"
  14 #include "base/values.h"
  15 #include "chrome/browser/content_settings/content_settings_provider.h"
  16 #include "chrome/browser/content_settings/content_settings_rule.h"
  17 #include "chrome/browser/content_settings/host_content_settings_map.h"
  18 #include "chrome/common/chrome_switches.h"
  19 #include "chrome/common/content_settings_pattern.h"
  20 #include "url/gurl.h"
  21
  22 namespace {
  23
  24 // The names of the ContentSettingsType values, for use with dictionary prefs.
  25 const char* kTypeNames[] = {
  26   "cookies",
  27   "images",
  28   "javascript",
  29   "plugins",
  30   "popups",
  31   "geolocation",
  32   "notifications",
  33   "auto-select-certificate",
  34   "fullscreen",
  35   "mouselock",
  36   "mixed-script",
  37   "media-stream",
  38   "media-stream-mic",
  39   "media-stream-camera",
  40   "register-protocol-handler",
  41   "ppapi-broker",
  42   "multiple-automatic-downloads",
  43   "midi-sysex",
  44   "push-messaging",
  45   "ssl-cert-decisions",
  46 #if defined(OS_WIN)
  47   "metro-switch-to-desktop",
  48 #elif defined(OS_ANDROID) || defined(OS_CHROMEOS)
  49   "protected-media-identifier",
  50 #endif
  51 #if defined(OS_ANDROID)
  52   "app-banner",
  53 #endif
  54 };
  55 COMPILE_ASSERT(arraysize(kTypeNames) == CONTENT_SETTINGS_NUM_TYPES,
  56                type_names_incorrect_size);
  57
  58 const char kPatternSeparator[] = ",";
  59
  60 }  // namespace
  61
  62 namespace content_settings {
  63
  64 std::string GetTypeName(ContentSettingsType type) {
  65   return std::string(kTypeNames[type]);
  66 }
  67
  68 bool GetTypeFromName(const std::string& name,
  69                      ContentSettingsType* return_setting) {
  70   for (size_t type = 0; type < CONTENT_SETTINGS_NUM_TYPES; ++type) {
  71     if (name.compare(kTypeNames[type]) == 0) {
  72       *return_setting = static_cast<ContentSettingsType>(type);
  73       return true;
  74     }
  75   }
  76   return false;
  77 }
  78
  79 std::string CreatePatternString(
  80     const ContentSettingsPattern& item_pattern,
  81     const ContentSettingsPattern& top_level_frame_pattern) {
  82   return item_pattern.ToString()
  83          + std::string(kPatternSeparator)
  84          + top_level_frame_pattern.ToString();
  85 }
  86
  87 PatternPair ParsePatternString(const std::string& pattern_str) {
  88   std::vector<std::string> pattern_str_list;
  89   base::SplitString(pattern_str, kPatternSeparator[0], &pattern_str_list);
  90
  91   // If the |pattern_str| is an empty string then the |pattern_string_list|
  92   // contains a single empty string. In this case the empty string will be
  93   // removed to signal an invalid |pattern_str|. Invalid pattern strings are
  94   // handle by the "if"-statment below. So the order of the if statements here
  95   // must be preserved.
  96   if (pattern_str_list.size() == 1) {
  97     if (pattern_str_list[0].empty()) {
  98       pattern_str_list.pop_back();
  99     } else {
 100       pattern_str_list.push_back("*");
 101     }
 102   }
 103
 104   if (pattern_str_list.size() > 2 ||
 105       pattern_str_list.size() == 0) {
 106     return PatternPair(ContentSettingsPattern(),
 107                        ContentSettingsPattern());
 108   }
 109
 110   PatternPair pattern_pair;
 111   pattern_pair.first =
 112       ContentSettingsPattern::FromString(pattern_str_list[0]);
 113   pattern_pair.second =
 114       ContentSettingsPattern::FromString(pattern_str_list[1]);
 115   return pattern_pair;
 116 }
 117
 118 ContentSetting ValueToContentSetting(const base::Value* value) {
 119   ContentSetting setting = CONTENT_SETTING_DEFAULT;
 120   bool valid = ParseContentSettingValue(value, &setting);
 121   DCHECK(valid);
 122   return setting;
 123 }
 124
 125 bool ParseContentSettingValue(const base::Value* value,
 126                               ContentSetting* setting) {
 127   if (!value) {
 128     *setting = CONTENT_SETTING_DEFAULT;
 129     return true;
 130   }
 131   int int_value = -1;
 132   if (!value->GetAsInteger(&int_value))
 133     return false;
 134   *setting = IntToContentSetting(int_value);
 135   return *setting != CONTENT_SETTING_DEFAULT;
 136 }
 137
 138 base::Value* GetContentSettingValueAndPatterns(
 139     const ProviderInterface* provider,
 140     const GURL& primary_url,
 141     const GURL& secondary_url,
 142     ContentSettingsType content_type,
 143     const std::string& resource_identifier,
 144     bool include_incognito,
 145     ContentSettingsPattern* primary_pattern,
 146     ContentSettingsPattern* secondary_pattern) {
 147   if (include_incognito) {
 148     // Check incognito-only specific settings. It's essential that the
 149     // |RuleIterator| gets out of scope before we get a rule iterator for the
 150     // normal mode.
 151     scoped_ptr<RuleIterator> incognito_rule_iterator(
 152         provider->GetRuleIterator(content_type, resource_identifier, true));
 153     base::Value* value = GetContentSettingValueAndPatterns(
 154         incognito_rule_iterator.get(), primary_url, secondary_url,
 155         primary_pattern, secondary_pattern);
 156     if (value)
 157       return value;
 158   }
 159   // No settings from the incognito; use the normal mode.
 160   scoped_ptr<RuleIterator> rule_iterator(
 161       provider->GetRuleIterator(content_type, resource_identifier, false));
 162   return GetContentSettingValueAndPatterns(
 163       rule_iterator.get(), primary_url, secondary_url,
 164       primary_pattern, secondary_pattern);
 165 }
 166
 167 base::Value* GetContentSettingValueAndPatterns(
 168     RuleIterator* rule_iterator,
 169     const GURL& primary_url,
 170     const GURL& secondary_url,
 171     ContentSettingsPattern* primary_pattern,
 172     ContentSettingsPattern* secondary_pattern) {
 173   while (rule_iterator->HasNext()) {
 174     const Rule& rule = rule_iterator->Next();
 175     if (rule.primary_pattern.Matches(primary_url) &&
 176         rule.secondary_pattern.Matches(secondary_url)) {
 177       if (primary_pattern)
 178         *primary_pattern = rule.primary_pattern;
 179       if (secondary_pattern)
 180         *secondary_pattern = rule.secondary_pattern;
 181       return rule.value.get()->DeepCopy();
 182     }
 183   }
 184   return NULL;
 185 }
 186
 187 base::Value* GetContentSettingValue(const ProviderInterface* provider,
 188                                     const GURL& primary_url,
 189                                     const GURL& secondary_url,
 190                                     ContentSettingsType content_type,
 191                                     const std::string& resource_identifier,
 192                                     bool include_incognito) {
 193   return GetContentSettingValueAndPatterns(provider, primary_url, secondary_url,
 194                                content_type, resource_identifier,
 195                                include_incognito, NULL, NULL);
 196 }
 197
 198 ContentSetting GetContentSetting(const ProviderInterface* provider,
 199                                  const GURL& primary_url,
 200                                  const GURL& secondary_url,
 201                                  ContentSettingsType content_type,
 202                                  const std::string& resource_identifier,
 203                                  bool include_incognito) {
 204   scoped_ptr<base::Value> value(
 205       GetContentSettingValue(provider, primary_url, secondary_url,
 206                              content_type, resource_identifier,
 207                              include_incognito));
 208   return ValueToContentSetting(value.get());
 209 }
 210
 211 void GetRendererContentSettingRules(const HostContentSettingsMap* map,
 212                                     RendererContentSettingRules* rules) {
 213   map->GetSettingsForOneType(
 214       CONTENT_SETTINGS_TYPE_IMAGES, std::string(), &(rules->image_rules));
 215   map->GetSettingsForOneType(
 216       CONTENT_SETTINGS_TYPE_JAVASCRIPT, std::string(), &(rules->script_rules));
 217 }
 218
 219 }  // namespace content_settings