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 #if defined(OS_WIN)
  45   "metro-switch-to-desktop",
  46 #elif defined(OS_ANDROID) || defined(OS_CHROMEOS)
  47   "protected-media-identifier",
  48 #endif
  49 };
  50 COMPILE_ASSERT(arraysize(kTypeNames) == CONTENT_SETTINGS_NUM_TYPES,
  51                type_names_incorrect_size);
  52
  53 const char kPatternSeparator[] = ",";
  54
  55 }  // namespace
  56
  57 namespace content_settings {
  58
  59 std::string GetTypeName(ContentSettingsType type) {
  60   return std::string(kTypeNames[type]);
  61 }
  62
  63 std::string CreatePatternString(
  64     const ContentSettingsPattern& item_pattern,
  65     const ContentSettingsPattern& top_level_frame_pattern) {
  66   return item_pattern.ToString()
  67          + std::string(kPatternSeparator)
  68          + top_level_frame_pattern.ToString();
  69 }
  70
  71 PatternPair ParsePatternString(const std::string& pattern_str) {
  72   std::vector<std::string> pattern_str_list;
  73   base::SplitString(pattern_str, kPatternSeparator[0], &pattern_str_list);
  74
  75   // If the |pattern_str| is an empty string then the |pattern_string_list|
  76   // contains a single empty string. In this case the empty string will be
  77   // removed to signal an invalid |pattern_str|. Invalid pattern strings are
  78   // handle by the "if"-statment below. So the order of the if statements here
  79   // must be preserved.
  80   if (pattern_str_list.size() == 1) {
  81     if (pattern_str_list[0].empty()) {
  82       pattern_str_list.pop_back();
  83     } else {
  84       pattern_str_list.push_back("*");
  85     }
  86   }
  87
  88   if (pattern_str_list.size() > 2 ||
  89       pattern_str_list.size() == 0) {
  90     return PatternPair(ContentSettingsPattern(),
  91                        ContentSettingsPattern());
  92   }
  93
  94   PatternPair pattern_pair;
  95   pattern_pair.first =
  96       ContentSettingsPattern::FromString(pattern_str_list[0]);
  97   pattern_pair.second =
  98       ContentSettingsPattern::FromString(pattern_str_list[1]);
  99   return pattern_pair;
 100 }
 101
 102 ContentSetting ValueToContentSetting(const base::Value* value) {
 103   ContentSetting setting = CONTENT_SETTING_DEFAULT;
 104   bool valid = ParseContentSettingValue(value, &setting);
 105   DCHECK(valid);
 106   return setting;
 107 }
 108
 109 bool ParseContentSettingValue(const base::Value* value,
 110                               ContentSetting* setting) {
 111   if (!value) {
 112     *setting = CONTENT_SETTING_DEFAULT;
 113     return true;
 114   }
 115   int int_value = -1;
 116   if (!value->GetAsInteger(&int_value))
 117     return false;
 118   *setting = IntToContentSetting(int_value);
 119   return *setting != CONTENT_SETTING_DEFAULT;
 120 }
 121
 122 base::Value* GetContentSettingValueAndPatterns(
 123     const ProviderInterface* provider,
 124     const GURL& primary_url,
 125     const GURL& secondary_url,
 126     ContentSettingsType content_type,
 127     const std::string& resource_identifier,
 128     bool include_incognito,
 129     ContentSettingsPattern* primary_pattern,
 130     ContentSettingsPattern* secondary_pattern) {
 131   if (include_incognito) {
 132     // Check incognito-only specific settings. It's essential that the
 133     // |RuleIterator| gets out of scope before we get a rule iterator for the
 134     // normal mode.
 135     scoped_ptr<RuleIterator> incognito_rule_iterator(
 136         provider->GetRuleIterator(content_type, resource_identifier, true));
 137     base::Value* value = GetContentSettingValueAndPatterns(
 138         incognito_rule_iterator.get(), primary_url, secondary_url,
 139         primary_pattern, secondary_pattern);
 140     if (value)
 141       return value;
 142   }
 143   // No settings from the incognito; use the normal mode.
 144   scoped_ptr<RuleIterator> rule_iterator(
 145       provider->GetRuleIterator(content_type, resource_identifier, false));
 146   return GetContentSettingValueAndPatterns(
 147       rule_iterator.get(), primary_url, secondary_url,
 148       primary_pattern, secondary_pattern);
 149 }
 150
 151 base::Value* GetContentSettingValueAndPatterns(
 152     RuleIterator* rule_iterator,
 153     const GURL& primary_url,
 154     const GURL& secondary_url,
 155     ContentSettingsPattern* primary_pattern,
 156     ContentSettingsPattern* secondary_pattern) {
 157   while (rule_iterator->HasNext()) {
 158     const Rule& rule = rule_iterator->Next();
 159     if (rule.primary_pattern.Matches(primary_url) &&
 160         rule.secondary_pattern.Matches(secondary_url)) {
 161       if (primary_pattern)
 162         *primary_pattern = rule.primary_pattern;
 163       if (secondary_pattern)
 164         *secondary_pattern = rule.secondary_pattern;
 165       return rule.value.get()->DeepCopy();
 166     }
 167   }
 168   return NULL;
 169 }
 170
 171 base::Value* GetContentSettingValue(const ProviderInterface* provider,
 172                                     const GURL& primary_url,
 173                                     const GURL& secondary_url,
 174                                     ContentSettingsType content_type,
 175                                     const std::string& resource_identifier,
 176                                     bool include_incognito) {
 177   return GetContentSettingValueAndPatterns(provider, primary_url, secondary_url,
 178                                content_type, resource_identifier,
 179                                include_incognito, NULL, NULL);
 180 }
 181
 182 ContentSetting GetContentSetting(const ProviderInterface* provider,
 183                                  const GURL& primary_url,
 184                                  const GURL& secondary_url,
 185                                  ContentSettingsType content_type,
 186                                  const std::string& resource_identifier,
 187                                  bool include_incognito) {
 188   scoped_ptr<base::Value> value(
 189       GetContentSettingValue(provider, primary_url, secondary_url,
 190                              content_type, resource_identifier,
 191                              include_incognito));
 192   return ValueToContentSetting(value.get());
 193 }
 194
 195 void GetRendererContentSettingRules(const HostContentSettingsMap* map,
 196                                     RendererContentSettingRules* rules) {
 197   map->GetSettingsForOneType(
 198       CONTENT_SETTINGS_TYPE_IMAGES, std::string(), &(rules->image_rules));
 199   map->GetSettingsForOneType(
 200       CONTENT_SETTINGS_TYPE_JAVASCRIPT, std::string(), &(rules->script_rules));
 201 }
 202
 203 }  // namespace content_settings