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
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
|
/* Copyright 2009 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kDefault
#include "mongo/bson/json.h"
#include <cstdint>
#include "mongo/base/parse_number.h"
#include "mongo/db/jsobj.h"
#include "mongo/platform/decimal128.h"
#include "mongo/platform/strtoll.h"
#include "mongo/util/base64.h"
#include "mongo/util/hex.h"
#include "mongo/util/log.h"
#include "mongo/util/mongoutils/str.h"
#include "mongo/util/time_support.h"
namespace mongo {
using std::unique_ptr;
using std::ostringstream;
using std::string;
#if 0
#define MONGO_JSON_DEBUG(message) \
log() << "JSON DEBUG @ " << __FILE__ << ":" << __LINE__ << " " << __FUNCTION__ << ": " \
<< message << endl;
#else
#define MONGO_JSON_DEBUG(message)
#endif
#define ALPHA "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
#define DIGIT "0123456789"
#define CONTROL "\a\b\f\n\r\t\v"
#define JOPTIONS "gims"
// Size hints given to char vectors
enum {
ID_RESERVE_SIZE = 64,
PAT_RESERVE_SIZE = 4096,
OPT_RESERVE_SIZE = 64,
FIELD_RESERVE_SIZE = 4096,
STRINGVAL_RESERVE_SIZE = 4096,
BINDATA_RESERVE_SIZE = 4096,
BINDATATYPE_RESERVE_SIZE = 4096,
NS_RESERVE_SIZE = 64,
DB_RESERVE_SIZE = 64,
NUMBERLONG_RESERVE_SIZE = 64,
NUMBERDECIMAL_RESERVE_SIZE = 64,
DATE_RESERVE_SIZE = 64
};
static const char *LBRACE = "{", *RBRACE = "}", *LBRACKET = "[", *RBRACKET = "]", *LPAREN = "(",
*RPAREN = ")", *COLON = ":", *COMMA = ",", *FORWARDSLASH = "/",
*SINGLEQUOTE = "'", *DOUBLEQUOTE = "\"";
JParse::JParse(StringData str)
: _buf(str.rawData()), _input(_buf), _input_end(_input + str.size()) {}
Status JParse::parseError(StringData msg) {
std::ostringstream ossmsg;
ossmsg << msg;
ossmsg << ": offset:";
ossmsg << offset();
ossmsg << " of:";
ossmsg << _buf;
return Status(ErrorCodes::FailedToParse, ossmsg.str());
}
Status JParse::value(StringData fieldName, BSONObjBuilder& builder) {
MONGO_JSON_DEBUG("fieldName: " << fieldName);
if (peekToken(LBRACE)) {
Status ret = object(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else if (peekToken(LBRACKET)) {
Status ret = array(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else if (readToken("new")) {
Status ret = constructor(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else if (readToken("Date")) {
Status ret = date(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else if (readToken("Timestamp")) {
Status ret = timestamp(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else if (readToken("ObjectId")) {
Status ret = objectId(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else if (readToken("NumberLong")) {
Status ret = numberLong(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else if (readToken("NumberInt")) {
Status ret = numberInt(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else if (readToken("NumberDecimal")) {
Status ret = numberDecimal(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else if (readToken("Dbref") || readToken("DBRef")) {
Status ret = dbRef(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else if (peekToken(FORWARDSLASH)) {
Status ret = regex(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else if (peekToken(DOUBLEQUOTE) || peekToken(SINGLEQUOTE)) {
std::string valueString;
valueString.reserve(STRINGVAL_RESERVE_SIZE);
Status ret = quotedString(&valueString);
if (ret != Status::OK()) {
return ret;
}
builder.append(fieldName, valueString);
} else if (readToken("true")) {
builder.append(fieldName, true);
} else if (readToken("false")) {
builder.append(fieldName, false);
} else if (readToken("null")) {
builder.appendNull(fieldName);
} else if (readToken("undefined")) {
builder.appendUndefined(fieldName);
} else if (readToken("NaN")) {
builder.append(fieldName, std::numeric_limits<double>::quiet_NaN());
} else if (readToken("Infinity")) {
builder.append(fieldName, std::numeric_limits<double>::infinity());
} else if (readToken("-Infinity")) {
builder.append(fieldName, -std::numeric_limits<double>::infinity());
} else {
Status ret = number(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
}
return Status::OK();
}
Status JParse::parse(BSONObjBuilder& builder) {
return isArray() ? array("UNUSED", builder, false) : object("UNUSED", builder, false);
}
Status JParse::object(StringData fieldName, BSONObjBuilder& builder, bool subObject) {
MONGO_JSON_DEBUG("fieldName: " << fieldName);
if (!readToken(LBRACE)) {
return parseError("Expecting '{'");
}
// Empty object
if (readToken(RBRACE)) {
if (subObject) {
BSONObjBuilder empty(builder.subobjStart(fieldName));
empty.done();
}
return Status::OK();
}
// Special object
std::string firstField;
firstField.reserve(FIELD_RESERVE_SIZE);
Status ret = field(&firstField);
if (ret != Status::OK()) {
return ret;
}
if (firstField == "$oid") {
if (!subObject) {
return parseError("Reserved field name in base object: $oid");
}
Status ret = objectIdObject(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else if (firstField == "$binary") {
if (!subObject) {
return parseError("Reserved field name in base object: $binary");
}
Status ret = binaryObject(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else if (firstField == "$date") {
if (!subObject) {
return parseError("Reserved field name in base object: $date");
}
Status ret = dateObject(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else if (firstField == "$timestamp") {
if (!subObject) {
return parseError("Reserved field name in base object: $timestamp");
}
Status ret = timestampObject(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else if (firstField == "$regex") {
if (!subObject) {
return parseError("Reserved field name in base object: $regex");
}
Status ret = regexObject(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else if (firstField == "$ref") {
if (!subObject) {
return parseError("Reserved field name in base object: $ref");
}
Status ret = dbRefObject(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else if (firstField == "$undefined") {
if (!subObject) {
return parseError("Reserved field name in base object: $undefined");
}
Status ret = undefinedObject(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else if (firstField == "$numberLong") {
if (!subObject) {
return parseError("Reserved field name in base object: $numberLong");
}
Status ret = numberLongObject(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else if (firstField == "$numberDecimal") {
if (!subObject) {
return parseError("Reserved field name in base object: $numberDecimal");
}
Status ret = numberDecimalObject(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else if (firstField == "$minKey") {
if (!subObject) {
return parseError("Reserved field name in base object: $minKey");
}
Status ret = minKeyObject(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else if (firstField == "$maxKey") {
if (!subObject) {
return parseError("Reserved field name in base object: $maxKey");
}
Status ret = maxKeyObject(fieldName, builder);
if (ret != Status::OK()) {
return ret;
}
} else { // firstField != <reserved field name>
// Normal object
// Only create a sub builder if this is not the base object
BSONObjBuilder* objBuilder = &builder;
unique_ptr<BSONObjBuilder> subObjBuilder;
if (subObject) {
subObjBuilder.reset(new BSONObjBuilder(builder.subobjStart(fieldName)));
objBuilder = subObjBuilder.get();
}
if (!readToken(COLON)) {
return parseError("Expecting ':'");
}
Status valueRet = value(firstField, *objBuilder);
if (valueRet != Status::OK()) {
return valueRet;
}
while (readToken(COMMA)) {
std::string fieldName;
fieldName.reserve(FIELD_RESERVE_SIZE);
Status fieldRet = field(&fieldName);
if (fieldRet != Status::OK()) {
return fieldRet;
}
if (!readToken(COLON)) {
return parseError("Expecting ':'");
}
Status valueRet = value(fieldName, *objBuilder);
if (valueRet != Status::OK()) {
return valueRet;
}
}
}
if (!readToken(RBRACE)) {
return parseError("Expecting '}' or ','");
}
return Status::OK();
}
Status JParse::objectIdObject(StringData fieldName, BSONObjBuilder& builder) {
if (!readToken(COLON)) {
return parseError("Expected ':'");
}
std::string id;
id.reserve(ID_RESERVE_SIZE);
Status ret = quotedString(&id);
if (ret != Status::OK()) {
return ret;
}
if (id.size() != 24) {
return parseError("Expecting 24 hex digits: " + id);
}
if (!isHexString(id)) {
return parseError("Expecting hex digits: " + id);
}
builder.append(fieldName, OID(id));
return Status::OK();
}
Status JParse::binaryObject(StringData fieldName, BSONObjBuilder& builder) {
if (!readToken(COLON)) {
return parseError("Expected ':'");
}
std::string binDataString;
binDataString.reserve(BINDATA_RESERVE_SIZE);
Status dataRet = quotedString(&binDataString);
if (dataRet != Status::OK()) {
return dataRet;
}
if (binDataString.size() % 4 != 0) {
return parseError("Invalid length base64 encoded string");
}
if (!isBase64String(binDataString)) {
return parseError("Invalid character in base64 encoded string");
}
const std::string& binData = base64::decode(binDataString);
if (!readToken(COMMA)) {
return parseError("Expected ','");
}
if (!readField("$type")) {
return parseError("Expected second field name: \"$type\", in \"$binary\" object");
}
if (!readToken(COLON)) {
return parseError("Expected ':'");
}
std::string binDataType;
binDataType.reserve(BINDATATYPE_RESERVE_SIZE);
Status typeRet = quotedString(&binDataType);
if (typeRet != Status::OK()) {
return typeRet;
}
if ((binDataType.size() != 2) || !isHexString(binDataType)) {
return parseError(
"Argument of $type in $bindata object must be a hex string representation of a single "
"byte");
}
// The fromHex function returns a signed char, but the highest
// BinDataType value is 128, which can only be represented as an
// unsigned char. If we don't coerce it to an unsigned char before
// wrapping it in a BinDataType (currently implicitly a signed
// integer), we get undefined behavior.
const auto binDataTypeNumeric = static_cast<unsigned char>(fromHex(binDataType));
builder.appendBinData(
fieldName, binData.length(), BinDataType(binDataTypeNumeric), binData.data());
return Status::OK();
}
Status JParse::dateObject(StringData fieldName, BSONObjBuilder& builder) {
if (!readToken(COLON)) {
return parseError("Expected ':'");
}
errno = 0;
char* endptr;
Date_t date;
if (peekToken(DOUBLEQUOTE)) {
std::string dateString;
dateString.reserve(DATE_RESERVE_SIZE);
Status ret = quotedString(&dateString);
if (!ret.isOK()) {
return ret;
}
StatusWith<Date_t> dateRet = dateFromISOString(dateString);
if (!dateRet.isOK()) {
return dateRet.getStatus();
}
date = dateRet.getValue();
} else if (readToken(LBRACE)) {
std::string fieldName;
fieldName.reserve(FIELD_RESERVE_SIZE);
Status ret = field(&fieldName);
if (ret != Status::OK()) {
return ret;
}
if (fieldName != "$numberLong") {
return parseError("Expected field name: $numberLong for $date value object");
}
if (!readToken(COLON)) {
return parseError("Expecting ':'");
}
// The number must be a quoted string, since large long numbers could overflow a double
// and thus may not be valid JSON
std::string numberLongString;
numberLongString.reserve(NUMBERLONG_RESERVE_SIZE);
ret = quotedString(&numberLongString);
if (!ret.isOK()) {
return ret;
}
long long numberLong;
ret = parseNumberFromString(numberLongString, &numberLong);
if (!ret.isOK()) {
return ret;
}
date = Date_t::fromMillisSinceEpoch(numberLong);
} else {
// SERVER-11920: We should use parseNumberFromString here, but that function requires
// that we know ahead of time where the number ends, which is not currently the case.
date = Date_t::fromMillisSinceEpoch(strtoll(_input, &endptr, 10));
if (_input == endptr) {
return parseError("Date expecting integer milliseconds");
}
if (errno == ERANGE) {
/* Need to handle this because jsonString outputs the value of Date_t as unsigned.
* See SERVER-8330 and SERVER-8573 */
errno = 0;
// SERVER-11920: We should use parseNumberFromString here, but that function
// requires that we know ahead of time where the number ends, which is not currently
// the case.
date =
Date_t::fromMillisSinceEpoch(static_cast<long long>(strtoull(_input, &endptr, 10)));
if (errno == ERANGE) {
return parseError("Date milliseconds overflow");
}
}
_input = endptr;
}
builder.appendDate(fieldName, date);
return Status::OK();
}
Status JParse::timestampObject(StringData fieldName, BSONObjBuilder& builder) {
if (!readToken(COLON)) {
return parseError("Expecting ':'");
}
if (!readToken(LBRACE)) {
return parseError("Expecting '{' to start \"$timestamp\" object");
}
if (!readField("t")) {
return parseError("Expected field name \"t\" in \"$timestamp\" sub object");
}
if (!readToken(COLON)) {
return parseError("Expecting ':'");
}
if (readToken("-")) {
return parseError("Negative seconds in \"$timestamp\"");
}
errno = 0;
char* endptr;
// SERVER-11920: We should use parseNumberFromString here, but that function requires that
// we know ahead of time where the number ends, which is not currently the case.
uint32_t seconds = strtoul(_input, &endptr, 10);
if (errno == ERANGE) {
return parseError("Timestamp seconds overflow");
}
if (_input == endptr) {
return parseError("Expecting unsigned integer seconds in \"$timestamp\"");
}
_input = endptr;
if (!readToken(COMMA)) {
return parseError("Expecting ','");
}
if (!readField("i")) {
return parseError("Expected field name \"i\" in \"$timestamp\" sub object");
}
if (!readToken(COLON)) {
return parseError("Expecting ':'");
}
if (readToken("-")) {
return parseError("Negative increment in \"$timestamp\"");
}
errno = 0;
// SERVER-11920: We should use parseNumberFromString here, but that function requires that
// we know ahead of time where the number ends, which is not currently the case.
uint32_t count = strtoul(_input, &endptr, 10);
if (errno == ERANGE) {
return parseError("Timestamp increment overflow");
}
if (_input == endptr) {
return parseError("Expecting unsigned integer increment in \"$timestamp\"");
}
_input = endptr;
if (!readToken(RBRACE)) {
return parseError("Expecting '}'");
}
builder.append(fieldName, Timestamp(seconds, count));
return Status::OK();
}
Status JParse::regexObject(StringData fieldName, BSONObjBuilder& builder) {
if (!readToken(COLON)) {
return parseError("Expecting ':'");
}
std::string pat;
pat.reserve(PAT_RESERVE_SIZE);
Status patRet = quotedString(&pat);
if (patRet != Status::OK()) {
return patRet;
}
if (readToken(COMMA)) {
if (!readField("$options")) {
return parseError("Expected field name: \"$options\" in \"$regex\" object");
}
if (!readToken(COLON)) {
return parseError("Expecting ':'");
}
std::string opt;
opt.reserve(OPT_RESERVE_SIZE);
Status optRet = quotedString(&opt);
if (optRet != Status::OK()) {
return optRet;
}
Status optCheckRet = regexOptCheck(opt);
if (optCheckRet != Status::OK()) {
return optCheckRet;
}
builder.appendRegex(fieldName, pat, opt);
} else {
builder.appendRegex(fieldName, pat, "");
}
return Status::OK();
}
Status JParse::dbRefObject(StringData fieldName, BSONObjBuilder& builder) {
BSONObjBuilder subBuilder(builder.subobjStart(fieldName));
if (!readToken(COLON)) {
return parseError("DBRef: Expecting ':'");
}
std::string ns;
ns.reserve(NS_RESERVE_SIZE);
Status ret = quotedString(&ns);
if (ret != Status::OK()) {
return ret;
}
subBuilder.append("$ref", ns);
if (!readToken(COMMA)) {
return parseError("DBRef: Expecting ','");
}
if (!readField("$id")) {
return parseError("DBRef: Expected field name: \"$id\" in \"$ref\" object");
}
if (!readToken(COLON)) {
return parseError("DBRef: Expecting ':'");
}
Status valueRet = value("$id", subBuilder);
if (valueRet != Status::OK()) {
return valueRet;
}
if (readToken(COMMA)) {
if (!readField("$db")) {
return parseError("DBRef: Expected field name: \"$db\" in \"$ref\" object");
}
if (!readToken(COLON)) {
return parseError("DBRef: Expecting ':'");
}
std::string db;
db.reserve(DB_RESERVE_SIZE);
ret = quotedString(&db);
if (ret != Status::OK()) {
return ret;
}
subBuilder.append("$db", db);
}
subBuilder.done();
return Status::OK();
}
Status JParse::undefinedObject(StringData fieldName, BSONObjBuilder& builder) {
if (!readToken(COLON)) {
return parseError("Expecting ':'");
}
if (!readToken("true")) {
return parseError("Reserved field \"$undefined\" requires value of true");
}
builder.appendUndefined(fieldName);
return Status::OK();
}
Status JParse::numberLongObject(StringData fieldName, BSONObjBuilder& builder) {
if (!readToken(COLON)) {
return parseError("Expecting ':'");
}
// The number must be a quoted string, since large long numbers could overflow a double and
// thus may not be valid JSON
std::string numberLongString;
numberLongString.reserve(NUMBERLONG_RESERVE_SIZE);
Status ret = quotedString(&numberLongString);
if (!ret.isOK()) {
return ret;
}
long long numberLong;
ret = parseNumberFromString(numberLongString, &numberLong);
if (!ret.isOK()) {
return ret;
}
builder.append(fieldName, numberLong);
return Status::OK();
}
Status JParse::numberDecimalObject(StringData fieldName, BSONObjBuilder& builder) {
if (!readToken(COLON)) {
return parseError("Expecting ':'");
}
// The number must be a quoted string, since large decimal numbers could overflow other types
// and thus may not be valid JSON
std::string numberDecimalString;
numberDecimalString.reserve(NUMBERDECIMAL_RESERVE_SIZE);
Status ret = quotedString(&numberDecimalString);
if (!ret.isOK()) {
return ret;
}
Decimal128 numberDecimal(numberDecimalString);
builder.appendNumber(fieldName, numberDecimal);
return Status::OK();
}
Status JParse::minKeyObject(StringData fieldName, BSONObjBuilder& builder) {
if (!readToken(COLON)) {
return parseError("Expecting ':'");
}
if (!readToken("1")) {
return parseError("Reserved field \"$minKey\" requires value of 1");
}
builder.appendMinKey(fieldName);
return Status::OK();
}
Status JParse::maxKeyObject(StringData fieldName, BSONObjBuilder& builder) {
if (!readToken(COLON)) {
return parseError("Expecting ':'");
}
if (!readToken("1")) {
return parseError("Reserved field \"$maxKey\" requires value of 1");
}
builder.appendMaxKey(fieldName);
return Status::OK();
}
Status JParse::array(StringData fieldName, BSONObjBuilder& builder, bool subObject) {
MONGO_JSON_DEBUG("fieldName: " << fieldName);
uint32_t index(0);
if (!readToken(LBRACKET)) {
return parseError("Expecting '['");
}
BSONObjBuilder* arrayBuilder = &builder;
unique_ptr<BSONObjBuilder> subObjBuilder;
if (subObject) {
subObjBuilder.reset(new BSONObjBuilder(builder.subarrayStart(fieldName)));
arrayBuilder = subObjBuilder.get();
}
if (!peekToken(RBRACKET)) {
do {
Status ret = value(builder.numStr(index), *arrayBuilder);
if (ret != Status::OK()) {
return ret;
}
index++;
} while (readToken(COMMA));
}
arrayBuilder->done();
if (!readToken(RBRACKET)) {
return parseError("Expecting ']' or ','");
}
return Status::OK();
}
/* NOTE: this could be easily modified to allow "new" before other
* constructors, but for now it only allows "new" before Date().
* Also note that unlike the interactive shell "Date(x)" and "new Date(x)"
* have the same behavior. XXX: this may not be desired. */
Status JParse::constructor(StringData fieldName, BSONObjBuilder& builder) {
if (readToken("Date")) {
date(fieldName, builder).transitional_ignore();
} else {
return parseError("\"new\" keyword not followed by Date constructor");
}
return Status::OK();
}
Status JParse::date(StringData fieldName, BSONObjBuilder& builder) {
if (!readToken(LPAREN)) {
return parseError("Expecting '('");
}
errno = 0;
char* endptr;
// SERVER-11920: We should use parseNumberFromString here, but that function requires that
// we know ahead of time where the number ends, which is not currently the case.
Date_t date = Date_t::fromMillisSinceEpoch(strtoll(_input, &endptr, 10));
if (_input == endptr) {
return parseError("Date expecting integer milliseconds");
}
if (errno == ERANGE) {
/* Need to handle this because jsonString outputs the value of Date_t as unsigned.
* See SERVER-8330 and SERVER-8573 */
errno = 0;
// SERVER-11920: We should use parseNumberFromString here, but that function requires
// that we know ahead of time where the number ends, which is not currently the case.
date = Date_t::fromMillisSinceEpoch(static_cast<long long>(strtoull(_input, &endptr, 10)));
if (errno == ERANGE) {
return parseError("Date milliseconds overflow");
}
}
_input = endptr;
if (!readToken(RPAREN)) {
return parseError("Expecting ')'");
}
builder.appendDate(fieldName, date);
return Status::OK();
}
Status JParse::timestamp(StringData fieldName, BSONObjBuilder& builder) {
if (!readToken(LPAREN)) {
return parseError("Expecting '('");
}
if (readToken("-")) {
return parseError("Negative seconds in \"$timestamp\"");
}
errno = 0;
char* endptr;
// SERVER-11920: We should use parseNumberFromString here, but that function requires that
// we know ahead of time where the number ends, which is not currently the case.
uint32_t seconds = strtoul(_input, &endptr, 10);
if (errno == ERANGE) {
return parseError("Timestamp seconds overflow");
}
if (_input == endptr) {
return parseError("Expecting unsigned integer seconds in \"$timestamp\"");
}
_input = endptr;
if (!readToken(COMMA)) {
return parseError("Expecting ','");
}
if (readToken("-")) {
return parseError("Negative seconds in \"$timestamp\"");
}
errno = 0;
// SERVER-11920: We should use parseNumberFromString here, but that function requires that
// we know ahead of time where the number ends, which is not currently the case.
uint32_t count = strtoul(_input, &endptr, 10);
if (errno == ERANGE) {
return parseError("Timestamp increment overflow");
}
if (_input == endptr) {
return parseError("Expecting unsigned integer increment in \"$timestamp\"");
}
_input = endptr;
if (!readToken(RPAREN)) {
return parseError("Expecting ')'");
}
builder.append(fieldName, Timestamp(seconds, count));
return Status::OK();
}
Status JParse::objectId(StringData fieldName, BSONObjBuilder& builder) {
if (!readToken(LPAREN)) {
return parseError("Expecting '('");
}
std::string id;
id.reserve(ID_RESERVE_SIZE);
Status ret = quotedString(&id);
if (ret != Status::OK()) {
return ret;
}
if (!readToken(RPAREN)) {
return parseError("Expecting ')'");
}
if (id.size() != 24) {
return parseError("Expecting 24 hex digits: " + id);
}
if (!isHexString(id)) {
return parseError("Expecting hex digits: " + id);
}
builder.append(fieldName, OID(id));
return Status::OK();
}
Status JParse::numberLong(StringData fieldName, BSONObjBuilder& builder) {
if (!readToken(LPAREN)) {
return parseError("Expecting '('");
}
errno = 0;
char* endptr;
// SERVER-11920: We should use parseNumberFromString here, but that function requires that
// we know ahead of time where the number ends, which is not currently the case.
int64_t val = strtoll(_input, &endptr, 10);
if (errno == ERANGE) {
return parseError("NumberLong out of range");
}
if (_input == endptr) {
return parseError("Expecting number in NumberLong");
}
_input = endptr;
if (!readToken(RPAREN)) {
return parseError("Expecting ')'");
}
builder.append(fieldName, static_cast<long long int>(val));
return Status::OK();
}
Status JParse::numberDecimal(StringData fieldName, BSONObjBuilder& builder) {
if (!readToken(LPAREN)) {
return parseError("Expecting '('");
}
std::string decString;
decString.reserve(NUMBERDECIMAL_RESERVE_SIZE);
Status ret = quotedString(&decString);
if (ret != Status::OK()) {
return ret;
}
Decimal128 val(decString);
if (!readToken(RPAREN)) {
return parseError("Expecting ')'");
}
builder.appendNumber(fieldName, val);
return Status::OK();
}
Status JParse::numberInt(StringData fieldName, BSONObjBuilder& builder) {
if (!readToken(LPAREN)) {
return parseError("Expecting '('");
}
errno = 0;
char* endptr;
// SERVER-11920: We should use parseNumberFromString here, but that function requires that
// we know ahead of time where the number ends, which is not currently the case.
int32_t val = strtol(_input, &endptr, 10);
if (errno == ERANGE) {
return parseError("NumberInt out of range");
}
if (_input == endptr) {
return parseError("Expecting unsigned number in NumberInt");
}
_input = endptr;
if (!readToken(RPAREN)) {
return parseError("Expecting ')'");
}
builder.appendNumber(fieldName, static_cast<int>(val));
return Status::OK();
}
Status JParse::dbRef(StringData fieldName, BSONObjBuilder& builder) {
BSONObjBuilder subBuilder(builder.subobjStart(fieldName));
if (!readToken(LPAREN)) {
return parseError("Expecting '('");
}
std::string ns;
ns.reserve(NS_RESERVE_SIZE);
Status refRet = quotedString(&ns);
if (refRet != Status::OK()) {
return refRet;
}
subBuilder.append("$ref", ns);
if (!readToken(COMMA)) {
return parseError("Expecting ','");
}
Status valueRet = value("$id", subBuilder);
if (valueRet != Status::OK()) {
return valueRet;
}
if (readToken(COMMA)) {
std::string db;
db.reserve(DB_RESERVE_SIZE);
Status dbRet = quotedString(&db);
if (dbRet != Status::OK()) {
return dbRet;
}
subBuilder.append("$db", db);
}
if (!readToken(RPAREN)) {
return parseError("Expecting ')'");
}
subBuilder.done();
return Status::OK();
}
Status JParse::regex(StringData fieldName, BSONObjBuilder& builder) {
if (!readToken(FORWARDSLASH)) {
return parseError("Expecting '/'");
}
std::string pat;
pat.reserve(PAT_RESERVE_SIZE);
Status patRet = regexPat(&pat);
if (patRet != Status::OK()) {
return patRet;
}
if (!readToken(FORWARDSLASH)) {
return parseError("Expecting '/'");
}
std::string opt;
opt.reserve(OPT_RESERVE_SIZE);
Status optRet = regexOpt(&opt);
if (optRet != Status::OK()) {
return optRet;
}
Status optCheckRet = regexOptCheck(opt);
if (optCheckRet != Status::OK()) {
return optCheckRet;
}
builder.appendRegex(fieldName, pat, opt);
return Status::OK();
}
Status JParse::regexPat(std::string* result) {
MONGO_JSON_DEBUG("");
return chars(result, "/");
}
Status JParse::regexOpt(std::string* result) {
MONGO_JSON_DEBUG("");
return chars(result, "", JOPTIONS);
}
Status JParse::regexOptCheck(StringData opt) {
MONGO_JSON_DEBUG("opt: " << opt);
std::size_t i;
for (i = 0; i < opt.size(); i++) {
if (!match(opt[i], JOPTIONS)) {
return parseError(string("Bad regex option: ") + opt[i]);
}
}
return Status::OK();
}
Status JParse::number(StringData fieldName, BSONObjBuilder& builder) {
char* endptrll;
char* endptrd;
long long retll;
double retd;
// reset errno to make sure that we are getting it from strtod
errno = 0;
// SERVER-11920: We should use parseNumberFromString here, but that function requires that
// we know ahead of time where the number ends, which is not currently the case.
retd = strtod(_input, &endptrd);
// if pointer does not move, we found no digits
if (_input == endptrd) {
return parseError("Bad characters in value");
}
if (errno == ERANGE) {
return parseError("Value cannot fit in double");
}
// reset errno to make sure that we are getting it from strtoll
errno = 0;
// SERVER-11920: We should use parseNumberFromString here, but that function requires that
// we know ahead of time where the number ends, which is not currently the case.
retll = strtoll(_input, &endptrll, 10);
if (endptrll < endptrd || errno == ERANGE) {
// The number either had characters only meaningful for a double or
// could not fit in a 64 bit int
MONGO_JSON_DEBUG("Type: double");
builder.append(fieldName, retd);
} else if (retll == static_cast<int>(retll)) {
// The number can fit in a 32 bit int
MONGO_JSON_DEBUG("Type: 32 bit int");
builder.append(fieldName, static_cast<int>(retll));
} else {
// The number can fit in a 64 bit int
MONGO_JSON_DEBUG("Type: 64 bit int");
builder.append(fieldName, retll);
}
_input = endptrd;
if (_input >= _input_end) {
return parseError("Trailing number at end of input");
}
return Status::OK();
}
Status JParse::field(std::string* result) {
MONGO_JSON_DEBUG("");
if (peekToken(DOUBLEQUOTE) || peekToken(SINGLEQUOTE)) {
// Quoted key
// TODO: make sure quoted field names cannot contain null characters
return quotedString(result);
} else {
// Unquoted key
// 'isspace()' takes an 'int' (signed), so (default signed) 'char's get sign-extended
// and therefore 'corrupted' unless we force them to be unsigned ... 0x80 becomes
// 0xffffff80 as seen by isspace when sign-extended ... we want it to be 0x00000080
while (_input < _input_end && isspace(*reinterpret_cast<const unsigned char*>(_input))) {
++_input;
}
if (_input >= _input_end) {
return parseError("Field name expected");
}
if (!match(*_input, ALPHA "_$")) {
return parseError("First character in field must be [A-Za-z$_]");
}
return chars(result, "", ALPHA DIGIT "_$");
}
}
Status JParse::quotedString(std::string* result) {
MONGO_JSON_DEBUG("");
if (readToken(DOUBLEQUOTE)) {
Status ret = chars(result, "\"");
if (ret != Status::OK()) {
return ret;
}
if (!readToken(DOUBLEQUOTE)) {
return parseError("Expecting '\"'");
}
} else if (readToken(SINGLEQUOTE)) {
Status ret = chars(result, "'");
if (ret != Status::OK()) {
return ret;
}
if (!readToken(SINGLEQUOTE)) {
return parseError("Expecting '''");
}
} else {
return parseError("Expecting quoted string");
}
return Status::OK();
}
/*
* terminalSet are characters that signal end of string (e.g.) [ :\0]
* allowedSet are the characters that are allowed, if this is set
*/
Status JParse::chars(std::string* result, const char* terminalSet, const char* allowedSet) {
MONGO_JSON_DEBUG("terminalSet: " << terminalSet);
if (_input >= _input_end) {
return parseError("Unexpected end of input");
}
const char* q = _input;
while (q < _input_end && !match(*q, terminalSet)) {
MONGO_JSON_DEBUG("q: " << q);
if (allowedSet != NULL) {
if (!match(*q, allowedSet)) {
_input = q;
return Status::OK();
}
}
if (0x00 <= *q && *q <= 0x1F) {
return parseError("Invalid control character");
}
if (*q == '\\' && q + 1 < _input_end) {
switch (*(++q)) {
// Escape characters allowed by the JSON spec
case '"':
result->push_back('"');
break;
case '\'':
result->push_back('\'');
break;
case '\\':
result->push_back('\\');
break;
case '/':
result->push_back('/');
break;
case 'b':
result->push_back('\b');
break;
case 'f':
result->push_back('\f');
break;
case 'n':
result->push_back('\n');
break;
case 'r':
result->push_back('\r');
break;
case 't':
result->push_back('\t');
break;
case 'u': { // expect 4 hexdigits
// TODO: handle UTF-16 surrogate characters
++q;
if (q + 4 >= _input_end) {
return parseError("Expecting 4 hex digits");
}
if (!isHexString(StringData(q, 4))) {
return parseError("Expecting 4 hex digits");
}
unsigned char first = fromHex(q);
unsigned char second = fromHex(q += 2);
const std::string& utf8str = encodeUTF8(first, second);
for (unsigned int i = 0; i < utf8str.size(); i++) {
result->push_back(utf8str[i]);
}
++q;
break;
}
// Vertical tab character. Not in JSON spec but allowed in
// our implementation according to test suite.
case 'v':
result->push_back('\v');
break;
// Escape characters we explicity disallow
case 'x':
return parseError("Hex escape not supported");
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
return parseError("Octal escape not supported");
// By default pass on the unescaped character
default:
result->push_back(*q);
break;
// TODO: check for escaped control characters
}
++q;
} else {
result->push_back(*q++);
}
}
if (q < _input_end) {
_input = q;
return Status::OK();
}
return parseError("Unexpected end of input");
}
std::string JParse::encodeUTF8(unsigned char first, unsigned char second) const {
std::ostringstream oss;
if (first == 0 && second < 0x80) {
oss << second;
} else if (first < 0x08) {
oss << char(0xc0 | (first << 2 | second >> 6));
oss << char(0x80 | (~0xc0 & second));
} else {
oss << char(0xe0 | (first >> 4));
oss << char(0x80 | (~0xc0 & (first << 2 | second >> 6)));
oss << char(0x80 | (~0xc0 & second));
}
return oss.str();
}
inline bool JParse::peekToken(const char* token) {
return readTokenImpl(token, false);
}
inline bool JParse::readToken(const char* token) {
return readTokenImpl(token, true);
}
bool JParse::readTokenImpl(const char* token, bool advance) {
MONGO_JSON_DEBUG("token: " << token);
const char* check = _input;
if (token == NULL) {
return false;
}
// 'isspace()' takes an 'int' (signed), so (default signed) 'char's get sign-extended
// and therefore 'corrupted' unless we force them to be unsigned ... 0x80 becomes
// 0xffffff80 as seen by isspace when sign-extended ... we want it to be 0x00000080
while (check < _input_end && isspace(*reinterpret_cast<const unsigned char*>(check))) {
++check;
}
while (*token != '\0') {
if (check >= _input_end) {
return false;
}
if (*token++ != *check++) {
return false;
}
}
if (advance) {
_input = check;
}
return true;
}
bool JParse::readField(StringData expectedField) {
MONGO_JSON_DEBUG("expectedField: " << expectedField);
std::string nextField;
nextField.reserve(FIELD_RESERVE_SIZE);
Status ret = field(&nextField);
if (ret != Status::OK()) {
return false;
}
if (expectedField != nextField) {
return false;
}
return true;
}
inline bool JParse::match(char matchChar, const char* matchSet) const {
if (matchSet == NULL) {
return true;
}
if (*matchSet == '\0') {
return false;
}
return (strchr(matchSet, matchChar) != NULL);
}
bool JParse::isHexString(StringData str) const {
MONGO_JSON_DEBUG("str: " << str);
std::size_t i;
for (i = 0; i < str.size(); i++) {
if (!isxdigit(str[i])) {
return false;
}
}
return true;
}
bool JParse::isBase64String(StringData str) const {
MONGO_JSON_DEBUG("str: " << str);
return base64::validate(str);
}
bool JParse::isArray() {
return peekToken(LBRACKET);
}
BSONObj fromjson(const char* jsonString, int* len) {
MONGO_JSON_DEBUG("jsonString: " << jsonString);
if (jsonString[0] == '\0') {
if (len)
*len = 0;
return BSONObj();
}
JParse jparse(jsonString);
BSONObjBuilder builder;
Status ret = Status::OK();
try {
ret = jparse.parse(builder);
} catch (std::exception& e) {
std::ostringstream message;
message << "caught exception from within JSON parser: " << e.what();
throw MsgAssertionException(17031, message.str());
}
if (ret != Status::OK()) {
ostringstream message;
message << "code " << ret.code() << ": " << ret.codeString() << ": " << ret.reason();
throw MsgAssertionException(16619, message.str());
}
if (len)
*len = jparse.offset();
return builder.obj();
}
BSONObj fromjson(const std::string& str) {
return fromjson(str.c_str());
}
std::string tojson(const BSONObj& obj, JsonStringFormat format, bool pretty) {
return obj.jsonString(format, pretty);
}
std::string tojson(const BSONArray& arr, JsonStringFormat format, bool pretty) {
return arr.jsonString(format, pretty, true);
}
bool isArray(StringData str) {
JParse parser(str);
return parser.isArray();
}
} /* namespace mongo */
|