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