remoting/host/json_host_config.cc

   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 "remoting/host/json_host_config.h"
   6
   7 #include "base/bind.h"
   8 #include "base/files/file_util.h"
   9 #include "base/files/important_file_writer.h"
  10 #include "base/json/json_reader.h"
  11 #include "base/json/json_writer.h"
  12 #include "base/location.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/values.h"
  15
  16 namespace remoting {
  17
  18 JsonHostConfig::JsonHostConfig(const base::FilePath& filename)
  19     : filename_(filename) {
  20 }
  21
  22 JsonHostConfig::~JsonHostConfig() {}
  23
  24 bool JsonHostConfig::Read() {
  25   DCHECK(CalledOnValidThread());
  26
  27   // TODO(sergeyu): Implement better error handling here.
  28   std::string file_content;
  29   if (!base::ReadFileToString(filename_, &file_content)) {
  30     LOG(WARNING) << "Failed to read " << filename_.value();
  31     return false;
  32   }
  33
  34   return SetSerializedData(file_content);
  35 }
  36
  37 bool JsonHostConfig::Save() {
  38   DCHECK(CalledOnValidThread());
  39
  40   return base::ImportantFileWriter::WriteFileAtomically(filename_,
  41                                                         GetSerializedData());
  42 }
  43
  44 std::string JsonHostConfig::GetSerializedData() {
  45   std::string data;
  46   base::JSONWriter::Write(values_.get(), &data);
  47   return data;
  48 }
  49
  50 bool JsonHostConfig::SetSerializedData(const std::string& config) {
  51   scoped_ptr<base::Value> value(
  52       base::JSONReader::Read(config, base::JSON_ALLOW_TRAILING_COMMAS));
  53   if (value.get() == NULL || !value->IsType(base::Value::TYPE_DICTIONARY)) {
  54     LOG(WARNING) << "Failed to parse " << filename_.value();
  55     return false;
  56   }
  57
  58   base::DictionaryValue* dictionary =
  59       static_cast<base::DictionaryValue*>(value.release());
  60   values_.reset(dictionary);
  61   return true;
  62 }
  63
  64 }  // namespace remoting