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
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
// Copyright (c) 2014 Baidu, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <algorithm>
#include <butil/logging.h>
#include <json2pb/pb_to_json.h>
#include <json2pb/json_to_pb.h>
#include "pb_util.h"
#include "json_loader.h"
#include <errno.h>
namespace brpc {
class JsonLoader::Reader {
public:
explicit Reader(int fd2)
: _fd(fd2)
, _brace_depth(0)
, _quoted(false)
, _quote_char(0)
{}
explicit Reader(const std::string& jsons)
: _fd(-1)
, _brace_depth(0)
, _quoted(false)
, _quote_char(0) {
_file_buf.append(jsons);
}
bool get_next_json(butil::IOBuf* json1);
bool read_some();
private:
int _fd;
int _brace_depth;
bool _quoted; // quoted by " or '
char _quote_char;
butil::IOPortal _file_buf;
};
// Load data from the file.
bool JsonLoader::Reader::read_some() {
if (_fd < 0) { // loading from a string.
return false;
}
ssize_t nr = _file_buf.append_from_file_descriptor(_fd, 65536);
if (nr < 0) {
if (errno == EINTR) {
return read_some();
}
PLOG(ERROR) << "Fail to read fd=" << _fd;
return false;
} else if (nr == 0) {
return false;
} else {
return true;
}
}
// Ignore json only with spaces and newline
static bool possibly_valid_json(const butil::IOBuf& json) {
butil::IOBufAsZeroCopyInputStream it(json);
const void* data = NULL;
int size = 0;
int total_size = 0;
for (; it.Next(&data, &size); total_size += size) {
for (int i = 0; i < size; ++i) {
char c = ((const char*)data)[i];
if (!isspace(c) && c != '\n') {
return true;
}
}
}
return false;
}
// Separate jsons with closed braces.
bool JsonLoader::Reader::get_next_json(butil::IOBuf* json1) {
if (_file_buf.empty()) {
if (!read_some()) {
return false;
}
}
json1->clear();
while (1) {
butil::IOBufAsZeroCopyInputStream it(_file_buf);
const void* data = NULL;
int size = 0;
int total_size = 0;
int skipped = 0;
for (; it.Next(&data, &size); total_size += size) {
for (int i = 0; i < size; ++i) {
const char c = ((const char*)data)[i];
if (_brace_depth == 0) {
// skip any character until the first left brace is found.
if (c != '{') {
++skipped;
continue;
}
}
switch (c) {
case '{':
if (!_quoted) {
++_brace_depth;
} else {
VLOG(1) << "Quoted left brace";
}
break;
case '}':
if (!_quoted) {
--_brace_depth;
if (_brace_depth == 0) {
// the braces are closed, a complete object.
_file_buf.cutn(json1, total_size + i + 1);
json1->pop_front(skipped);
return possibly_valid_json(*json1);
} else if (_brace_depth < 0) {
LOG(ERROR) << "More right braces than left braces";
return false;
}
} else {
VLOG(1) << "Quoted right brace";
}
break;
case '"':
if (_quoted) {
if (_quote_char == '"') {
_quoted = false;
}
} else {
_quoted = true;
_quote_char = '"';
}
break;
case '\'':
if (_quoted) {
if (_quote_char == '\'') {
_quoted = false;
}
} else {
_quoted = true;
_quote_char = '\'';
}
break;
default:
break;
// just skip
}
}
}
if (!_file_buf.empty()) {
json1->append(_file_buf);
_file_buf.clear();
}
if (!read_some()) {
json1->pop_front(skipped);
if (!json1->empty()) {
return possibly_valid_json(*json1);
}
return false;
}
}
return false;
}
JsonLoader::JsonLoader(google::protobuf::compiler::Importer* importer,
google::protobuf::DynamicMessageFactory* factory,
const std::string& service_name,
const std::string& method_name)
: _importer(importer)
, _factory(factory)
, _service_name(service_name)
, _method_name(method_name)
{
_request_prototype = pbrpcframework::get_prototype_by_name(
_service_name, _method_name, true, _importer, _factory);
}
void JsonLoader::load_messages(
JsonLoader::Reader* ctx,
std::deque<google::protobuf::Message*>* out_msgs) {
out_msgs->clear();
butil::IOBuf request_json;
while (ctx->get_next_json(&request_json)) {
VLOG(1) << "Load " << out_msgs->size() + 1 << "-th json=`"
<< request_json << '\'';
std::string error;
google::protobuf::Message* request = _request_prototype->New();
butil::IOBufAsZeroCopyInputStream wrapper(request_json);
if (!json2pb::JsonToProtoMessage(&wrapper, request, &error)) {
LOG(WARNING) << "Fail to convert to pb: " << error << ", json=`"
<< request_json << '\'';
delete request;
continue;
}
out_msgs->push_back(request);
LOG_IF(INFO, (out_msgs->size() % 10000) == 0)
<< "Loaded " << out_msgs->size() << " jsons";
}
}
void JsonLoader::load_messages(
int fd,
std::deque<google::protobuf::Message*>* out_msgs) {
JsonLoader::Reader ctx(fd);
load_messages(&ctx, out_msgs);
}
void JsonLoader::load_messages(
const std::string& jsons,
std::deque<google::protobuf::Message*>* out_msgs) {
JsonLoader::Reader ctx(jsons);
load_messages(&ctx, out_msgs);
}
} // namespace brpc