114 lines
3.5 KiB
C++
114 lines
3.5 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/json/json_file_value_serializer.h"
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#include "base/files/file_util.h"
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#include "base/json/json_string_value_serializer.h"
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#include "base/logging.h"
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#include "build/build_config.h"
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using base::FilePath;
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const char JSONFileValueDeserializer::kAccessDenied[] = "Access denied.";
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const char JSONFileValueDeserializer::kCannotReadFile[] = "Can't read file.";
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const char JSONFileValueDeserializer::kFileLocked[] = "File locked.";
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const char JSONFileValueDeserializer::kNoSuchFile[] = "File doesn't exist.";
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JSONFileValueSerializer::JSONFileValueSerializer(
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const base::FilePath& json_file_path)
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: json_file_path_(json_file_path) {
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}
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JSONFileValueSerializer::~JSONFileValueSerializer() = default;
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bool JSONFileValueSerializer::Serialize(const base::Value& root) {
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return SerializeInternal(root, false);
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}
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bool JSONFileValueSerializer::SerializeAndOmitBinaryValues(
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const base::Value& root) {
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return SerializeInternal(root, true);
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}
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bool JSONFileValueSerializer::SerializeInternal(const base::Value& root,
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bool omit_binary_values) {
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std::string json_string;
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JSONStringValueSerializer serializer(&json_string);
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serializer.set_pretty_print(true);
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bool result = omit_binary_values ?
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serializer.SerializeAndOmitBinaryValues(root) :
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serializer.Serialize(root);
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if (!result)
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return false;
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int data_size = static_cast<int>(json_string.size());
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if (base::WriteFile(json_file_path_, json_string.data(), data_size) !=
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data_size)
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return false;
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return true;
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}
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JSONFileValueDeserializer::JSONFileValueDeserializer(
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const base::FilePath& json_file_path,
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int options)
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: json_file_path_(json_file_path), options_(options), last_read_size_(0U) {}
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JSONFileValueDeserializer::~JSONFileValueDeserializer() = default;
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int JSONFileValueDeserializer::ReadFileToString(std::string* json_string) {
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DCHECK(json_string);
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if (!base::ReadFileToString(json_file_path_, json_string)) {
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#if defined(OS_WIN)
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int error = ::GetLastError();
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if (error == ERROR_SHARING_VIOLATION || error == ERROR_LOCK_VIOLATION) {
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return JSON_FILE_LOCKED;
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} else if (error == ERROR_ACCESS_DENIED) {
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return JSON_ACCESS_DENIED;
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}
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#endif
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return base::PathExists(json_file_path_) ? JSON_CANNOT_READ_FILE
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: JSON_NO_SUCH_FILE;
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}
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last_read_size_ = json_string->size();
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return JSON_NO_ERROR;
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}
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const char* JSONFileValueDeserializer::GetErrorMessageForCode(int error_code) {
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switch (error_code) {
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case JSON_NO_ERROR:
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return "";
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case JSON_ACCESS_DENIED:
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return kAccessDenied;
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case JSON_CANNOT_READ_FILE:
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return kCannotReadFile;
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case JSON_FILE_LOCKED:
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return kFileLocked;
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case JSON_NO_SUCH_FILE:
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return kNoSuchFile;
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default:
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NOTREACHED();
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return "";
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}
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}
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std::unique_ptr<base::Value> JSONFileValueDeserializer::Deserialize(
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int* error_code,
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std::string* error_str) {
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std::string json_string;
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int error = ReadFileToString(&json_string);
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if (error != JSON_NO_ERROR) {
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if (error_code)
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*error_code = error;
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if (error_str)
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*error_str = GetErrorMessageForCode(error);
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return nullptr;
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}
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JSONStringValueDeserializer deserializer(json_string, options_);
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return deserializer.Deserialize(error_code, error_str);
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}
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