1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
// Copyright (c) 2011 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_value_serializer.h"
#include "base/file_util.h"
#include "base/json/json_reader.h"
#include "base/json/json_writer.h"
#include "base/string_util.h"
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.";
JSONStringValueSerializer::~JSONStringValueSerializer() {}
bool JSONStringValueSerializer::Serialize(const Value& root) {
return SerializeInternal(root, false);
}
bool JSONStringValueSerializer::SerializeAndOmitBinaryValues(
const Value& root) {
return SerializeInternal(root, true);
}
bool JSONStringValueSerializer::SerializeInternal(const Value& root,
bool omit_binary_values) {
if (!json_string_ || initialized_with_const_string_)
return false;
base::JSONWriter::WriteWithOptions(
&root,
pretty_print_,
omit_binary_values ? base::JSONWriter::OPTIONS_OMIT_BINARY_VALUES : 0,
json_string_);
return true;
}
Value* JSONStringValueSerializer::Deserialize(int* error_code,
std::string* error_str) {
if (!json_string_)
return NULL;
return base::JSONReader::ReadAndReturnError(*json_string_,
allow_trailing_comma_,
error_code,
error_str);
}
/******* File Serializer *******/
bool JSONFileValueSerializer::Serialize(const Value& root) {
return SerializeInternal(root, false);
}
bool JSONFileValueSerializer::SerializeAndOmitBinaryValues(const Value& root) {
return SerializeInternal(root, true);
}
bool JSONFileValueSerializer::SerializeInternal(const 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 (!file_util::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 "";
}
}
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);
}
|
