src/chrome/common/extensions/manifest_handlers/settings_overrides_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/common/extensions/manifest_handlers/settings_overrides_handler.h"
   6
   7 #include "base/memory/scoped_ptr.h"
   8 #include "base/strings/string_util.h"
   9 #include "base/strings/stringprintf.h"
  10 #include "base/strings/utf_string_conversions.h"
  11 #include "base/values.h"
  12 #include "extensions/common/error_utils.h"
  13 #include "extensions/common/extension_set.h"
  14 #include "extensions/common/feature_switch.h"
  15 #include "extensions/common/manifest_constants.h"
  16 #include "extensions/common/manifest_handlers/permissions_parser.h"
  17 #include "extensions/common/permissions/api_permission_set.h"
  18 #include "extensions/common/permissions/manifest_permission.h"
  19 #include "extensions/common/permissions/permissions_info.h"
  20 #include "extensions/common/permissions/settings_override_permission.h"
  21 #include "ipc/ipc_message.h"
  22 #include "ipc/ipc_message_utils.h"
  23 #include "url/gurl.h"
  24
  25 using extensions::api::manifest_types::ChromeSettingsOverrides;
  26
  27 namespace extensions {
  28 namespace {
  29
  30 const char* kWwwPrefix = "www.";
  31
  32 scoped_ptr<GURL> CreateManifestURL(const std::string& url) {
  33   scoped_ptr<GURL> manifest_url(new GURL(url));
  34   if (!manifest_url->is_valid() ||
  35       !manifest_url->SchemeIsHTTPOrHTTPS())
  36     return scoped_ptr<GURL>();
  37   return manifest_url.Pass();
  38 }
  39
  40 scoped_ptr<GURL> ParseHomepage(const ChromeSettingsOverrides& overrides,
  41                                base::string16* error) {
  42   if (!overrides.homepage)
  43     return scoped_ptr<GURL>();
  44   scoped_ptr<GURL> manifest_url = CreateManifestURL(*overrides.homepage);
  45   if (!manifest_url) {
  46     *error = extensions::ErrorUtils::FormatErrorMessageUTF16(
  47         manifest_errors::kInvalidHomepageOverrideURL, *overrides.homepage);
  48   }
  49   return manifest_url.Pass();
  50 }
  51
  52 std::vector<GURL> ParseStartupPage(const ChromeSettingsOverrides& overrides,
  53                                    base::string16* error) {
  54   std::vector<GURL> urls;
  55   if (!overrides.startup_pages)
  56     return urls;
  57
  58   for (std::vector<std::string>::const_iterator i =
  59        overrides.startup_pages->begin(); i != overrides.startup_pages->end();
  60        ++i) {
  61     scoped_ptr<GURL> manifest_url = CreateManifestURL(*i);
  62     if (!manifest_url) {
  63       *error = extensions::ErrorUtils::FormatErrorMessageUTF16(
  64           manifest_errors::kInvalidStartupOverrideURL, *i);
  65     } else {
  66       urls.push_back(GURL());
  67       urls.back().Swap(manifest_url.get());
  68     }
  69   }
  70   return urls;
  71 }
  72
  73 scoped_ptr<ChromeSettingsOverrides::Search_provider> ParseSearchEngine(
  74     ChromeSettingsOverrides* overrides,
  75     base::string16* error) {
  76   if (!overrides->search_provider)
  77     return scoped_ptr<ChromeSettingsOverrides::Search_provider>();
  78   if (!CreateManifestURL(overrides->search_provider->search_url)) {
  79     *error = extensions::ErrorUtils::FormatErrorMessageUTF16(
  80         manifest_errors::kInvalidSearchEngineURL,
  81         overrides->search_provider->search_url);
  82     return scoped_ptr<ChromeSettingsOverrides::Search_provider>();
  83   }
  84   if (overrides->search_provider->prepopulated_id)
  85     return overrides->search_provider.Pass();
  86   if (!overrides->search_provider->name ||
  87       !overrides->search_provider->keyword ||
  88       !overrides->search_provider->encoding ||
  89       !overrides->search_provider->favicon_url) {
  90     *error =
  91         base::ASCIIToUTF16(manifest_errors::kInvalidSearchEngineMissingKeys);
  92     return scoped_ptr<ChromeSettingsOverrides::Search_provider>();
  93   }
  94   if (!CreateManifestURL(*overrides->search_provider->favicon_url)) {
  95     *error = extensions::ErrorUtils::FormatErrorMessageUTF16(
  96         manifest_errors::kInvalidSearchEngineURL,
  97         *overrides->search_provider->favicon_url);
  98     return scoped_ptr<ChromeSettingsOverrides::Search_provider>();
  99   }
 100   return overrides->search_provider.Pass();
 101 }
 102
 103 // A www. prefix is not informative and thus not worth the limited real estate
 104 // in the permissions UI.
 105 std::string RemoveWwwPrefix(const std::string& url) {
 106   if (StartsWithASCII(url, kWwwPrefix, false))
 107     return url.substr(strlen(kWwwPrefix));
 108   return url;
 109 }
 110
 111 }  // namespace
 112
 113 SettingsOverrides::SettingsOverrides() {}
 114
 115 SettingsOverrides::~SettingsOverrides() {}
 116
 117 // static
 118 const SettingsOverrides* SettingsOverrides::Get(
 119     const Extension* extension) {
 120   return static_cast<SettingsOverrides*>(
 121       extension->GetManifestData(manifest_keys::kSettingsOverride));
 122 }
 123
 124 SettingsOverridesHandler::SettingsOverridesHandler() {}
 125
 126 SettingsOverridesHandler::~SettingsOverridesHandler() {}
 127
 128 bool SettingsOverridesHandler::Parse(Extension* extension,
 129                                      base::string16* error) {
 130   const base::Value* dict = NULL;
 131   CHECK(extension->manifest()->Get(manifest_keys::kSettingsOverride, &dict));
 132   scoped_ptr<ChromeSettingsOverrides> settings(
 133       ChromeSettingsOverrides::FromValue(*dict, error));
 134   if (!settings)
 135     return false;
 136
 137   scoped_ptr<SettingsOverrides> info(new SettingsOverrides);
 138   info->homepage = ParseHomepage(*settings, error);
 139   info->search_engine = ParseSearchEngine(settings.get(), error);
 140   info->startup_pages = ParseStartupPage(*settings, error);
 141   if (!info->homepage && !info->search_engine && info->startup_pages.empty()) {
 142     *error = ErrorUtils::FormatErrorMessageUTF16(
 143         manifest_errors::kInvalidEmptyDictionary,
 144         manifest_keys::kSettingsOverride);
 145     return false;
 146   }
 147
 148   if (info->search_engine) {
 149     PermissionsParser::AddAPIPermission(
 150         extension,
 151         new SettingsOverrideAPIPermission(
 152             PermissionsInfo::GetInstance()->GetByID(
 153                 APIPermission::kSearchProvider),
 154             RemoveWwwPrefix(CreateManifestURL(info->search_engine->search_url)
 155                                 ->GetOrigin()
 156                                 .host())));
 157   }
 158   if (!info->startup_pages.empty()) {
 159     PermissionsParser::AddAPIPermission(
 160         extension,
 161         new SettingsOverrideAPIPermission(
 162             PermissionsInfo::GetInstance()->GetByID(
 163                 APIPermission::kStartupPages),
 164             // We only support one startup page even though the type of the
 165             // manifest
 166             // property is a list, only the first one is used.
 167             RemoveWwwPrefix(info->startup_pages[0].GetContent())));
 168   }
 169   if (info->homepage) {
 170     PermissionsParser::AddAPIPermission(
 171         extension,
 172         new SettingsOverrideAPIPermission(
 173             PermissionsInfo::GetInstance()->GetByID(APIPermission::kHomepage),
 174             RemoveWwwPrefix(info->homepage.get()->GetContent())));
 175   }
 176   extension->SetManifestData(manifest_keys::kSettingsOverride,
 177                              info.release());
 178   return true;
 179 }
 180
 181 const std::vector<std::string> SettingsOverridesHandler::Keys() const {
 182   return SingleKey(manifest_keys::kSettingsOverride);
 183 }
 184
 185 }  // namespace extensions