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
RunImpl()30 bool I18nGetAcceptLanguagesFunction::RunImpl() {
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