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/extensions/api/i18n/i18n_api.h" 6 7 #include <algorithm> 8 #include <string> 9 #include <vector> 10 11 #include "base/lazy_instance.h" 12 #include "base/prefs/pref_service.h" 13 #include "base/strings/string_piece.h" 14 #include "base/strings/string_split.h" 15 #include "chrome/browser/profiles/profile.h" 16 #include "chrome/common/extensions/api/i18n.h" 17 #include "chrome/common/pref_names.h" 18 19 namespace GetAcceptLanguages = extensions::api::i18n::GetAcceptLanguages; 20 21 namespace extensions { 22 23 namespace { 24 25 // Errors. 26 static const char kEmptyAcceptLanguagesError[] = "accept-languages is empty."; 27 28 } 29 30 bool I18nGetAcceptLanguagesFunction::RunSync() { 31 std::string accept_languages = 32 GetProfile()->GetPrefs()->GetString(prefs::kAcceptLanguages); 33 // Currently, there are 2 ways to set browser's accept-languages: through UI 34 // or directly modify the preference file. The accept-languages set through 35 // UI is guranteed to be valid, and the accept-languages string returned from 36 // profile()->GetPrefs()->GetString(prefs::kAcceptLanguages) is guranteed to 37 // be valid and well-formed, which means each accept-langauge is a valid 38 // code, and accept-languages are seperatd by "," without surrrounding 39 // spaces. But we do not do any validation (either the format or the validity 40 // of the language code) on accept-languages set through editing preference 41 // file directly. So, here, we're adding extra checks to be resistant to 42 // crashes caused by data corruption. 43 if (accept_languages.empty()) { 44 error_ = kEmptyAcceptLanguagesError; 45 return false; 46 } 47 48 std::vector<std::string> languages; 49 base::SplitString(accept_languages, ',', &languages); 50 languages.erase(std::remove(languages.begin(), languages.end(), ""), 51 languages.end()); 52 53 if (languages.empty()) { 54 error_ = kEmptyAcceptLanguagesError; 55 return false; 56 } 57 58 results_ = GetAcceptLanguages::Results::Create(languages); 59 return true; 60 } 61 62 } // namespace extensions 63