chrome/utility/media_galleries/itunes_pref_parser_win.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/utility/media_galleries/itunes_pref_parser_win.h"
   6
   7 #include "base/base64.h"
   8 #include "base/strings/string_util.h"
   9 #include "chrome/utility/media_galleries/iapps_xml_utils.h"
  10 #include "third_party/libxml/chromium/libxml_utils.h"
  11
  12 namespace itunes {
  13
  14 base::FilePath::StringType FindLibraryLocationInPrefXml(
  15     const std::string& pref_xml_data) {
  16   XmlReader reader;
  17   base::FilePath::StringType result;
  18
  19   if (!reader.Load(pref_xml_data))
  20     return result;
  21
  22   // Find the plist node and then search within that tag.
  23   if (!iapps::SeekToNodeAtCurrentDepth(&reader, "plist"))
  24     return result;
  25   if (!reader.Read())
  26     return result;
  27
  28   if (!iapps::SeekToNodeAtCurrentDepth(&reader, "dict"))
  29     return result;
  30
  31   if (!iapps::SeekInDict(&reader, "User Preferences"))
  32     return result;
  33
  34   if (!iapps::SeekToNodeAtCurrentDepth(&reader, "dict"))
  35     return result;
  36
  37   if (!iapps::SeekInDict(&reader, "iTunes Library XML Location:1"))
  38     return result;
  39
  40   if (!iapps::SeekToNodeAtCurrentDepth(&reader, "data"))
  41     return result;
  42
  43   std::string pref_value;
  44   if (!reader.ReadElementContent(&pref_value))
  45     return result;
  46   // The data is a base64 encoded wchar_t*. Because Base64Decode uses
  47   // std::strings, the result has to be casted to a wchar_t*.
  48   std::string data;
  49   if (!base::Base64Decode(base::CollapseWhitespaceASCII(pref_value, true),
  50                           &data))
  51     return result;
  52   return base::FilePath::StringType(
  53       reinterpret_cast<const wchar_t*>(data.data()), data.size() / 2);
  54 }
  55
  56 }  // namespace itunes