100 lines
3.0 KiB
C++
100 lines
3.0 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include "base/json/json_file_value_serializer.h"
|
|
|
|
#include "base/file_util.h"
|
|
#include "base/json/json_string_value_serializer.h"
|
|
#include "base/logging.h"
|
|
|
|
using base::FilePath;
|
|
|
|
const char* JSONFileValueSerializer::kAccessDenied = "Access denied.";
|
|
const char* JSONFileValueSerializer::kCannotReadFile = "Can't read file.";
|
|
const char* JSONFileValueSerializer::kFileLocked = "File locked.";
|
|
const char* JSONFileValueSerializer::kNoSuchFile = "File doesn't exist.";
|
|
|
|
bool JSONFileValueSerializer::Serialize(const base::Value& root) {
|
|
return SerializeInternal(root, false);
|
|
}
|
|
|
|
bool JSONFileValueSerializer::SerializeAndOmitBinaryValues(
|
|
const base::Value& root) {
|
|
return SerializeInternal(root, true);
|
|
}
|
|
|
|
bool JSONFileValueSerializer::SerializeInternal(const base::Value& root,
|
|
bool omit_binary_values) {
|
|
std::string json_string;
|
|
JSONStringValueSerializer serializer(&json_string);
|
|
serializer.set_pretty_print(true);
|
|
bool result = omit_binary_values ?
|
|
serializer.SerializeAndOmitBinaryValues(root) :
|
|
serializer.Serialize(root);
|
|
if (!result)
|
|
return false;
|
|
|
|
int data_size = static_cast<int>(json_string.size());
|
|
if (file_util::WriteFile(json_file_path_,
|
|
json_string.data(),
|
|
data_size) != data_size)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
int JSONFileValueSerializer::ReadFileToString(std::string* json_string) {
|
|
DCHECK(json_string);
|
|
if (!file_util::ReadFileToString(json_file_path_, json_string)) {
|
|
#if defined(OS_WIN)
|
|
int error = ::GetLastError();
|
|
if (error == ERROR_SHARING_VIOLATION || error == ERROR_LOCK_VIOLATION) {
|
|
return JSON_FILE_LOCKED;
|
|
} else if (error == ERROR_ACCESS_DENIED) {
|
|
return JSON_ACCESS_DENIED;
|
|
}
|
|
#endif
|
|
if (!base::PathExists(json_file_path_))
|
|
return JSON_NO_SUCH_FILE;
|
|
else
|
|
return JSON_CANNOT_READ_FILE;
|
|
}
|
|
return JSON_NO_ERROR;
|
|
}
|
|
|
|
const char* JSONFileValueSerializer::GetErrorMessageForCode(int error_code) {
|
|
switch (error_code) {
|
|
case JSON_NO_ERROR:
|
|
return "";
|
|
case JSON_ACCESS_DENIED:
|
|
return kAccessDenied;
|
|
case JSON_CANNOT_READ_FILE:
|
|
return kCannotReadFile;
|
|
case JSON_FILE_LOCKED:
|
|
return kFileLocked;
|
|
case JSON_NO_SUCH_FILE:
|
|
return kNoSuchFile;
|
|
default:
|
|
NOTREACHED();
|
|
return "";
|
|
}
|
|
}
|
|
|
|
base::Value* JSONFileValueSerializer::Deserialize(int* error_code,
|
|
std::string* error_str) {
|
|
std::string json_string;
|
|
int error = ReadFileToString(&json_string);
|
|
if (error != JSON_NO_ERROR) {
|
|
if (error_code)
|
|
*error_code = error;
|
|
if (error_str)
|
|
*error_str = GetErrorMessageForCode(error);
|
|
return NULL;
|
|
}
|
|
|
|
JSONStringValueSerializer serializer(json_string);
|
|
serializer.set_allow_trailing_comma(allow_trailing_comma_);
|
|
return serializer.Deserialize(error_code, error_str);
|
|
}
|