Don Newton | 379ae25 | 2019-04-01 12:17:06 -0400 | [diff] [blame^] | 1 | // Copyright (C) MongoDB, Inc. 2017-present. |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); you may |
| 4 | // not use this file except in compliance with the License. You may obtain |
| 5 | // a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 |
| 6 | |
| 7 | package bsonrw |
| 8 | |
| 9 | import ( |
| 10 | "encoding/base64" |
| 11 | "errors" |
| 12 | "fmt" |
| 13 | "math" |
| 14 | "strconv" |
| 15 | "time" |
| 16 | |
| 17 | "github.com/mongodb/mongo-go-driver/bson/bsontype" |
| 18 | "github.com/mongodb/mongo-go-driver/bson/primitive" |
| 19 | ) |
| 20 | |
| 21 | func wrapperKeyBSONType(key string) bsontype.Type { |
| 22 | switch string(key) { |
| 23 | case "$numberInt": |
| 24 | return bsontype.Int32 |
| 25 | case "$numberLong": |
| 26 | return bsontype.Int64 |
| 27 | case "$oid": |
| 28 | return bsontype.ObjectID |
| 29 | case "$symbol": |
| 30 | return bsontype.Symbol |
| 31 | case "$numberDouble": |
| 32 | return bsontype.Double |
| 33 | case "$numberDecimal": |
| 34 | return bsontype.Decimal128 |
| 35 | case "$binary": |
| 36 | return bsontype.Binary |
| 37 | case "$code": |
| 38 | return bsontype.JavaScript |
| 39 | case "$scope": |
| 40 | return bsontype.CodeWithScope |
| 41 | case "$timestamp": |
| 42 | return bsontype.Timestamp |
| 43 | case "$regularExpression": |
| 44 | return bsontype.Regex |
| 45 | case "$dbPointer": |
| 46 | return bsontype.DBPointer |
| 47 | case "$date": |
| 48 | return bsontype.DateTime |
| 49 | case "$ref": |
| 50 | fallthrough |
| 51 | case "$id": |
| 52 | fallthrough |
| 53 | case "$db": |
| 54 | return bsontype.EmbeddedDocument // dbrefs aren't bson types |
| 55 | case "$minKey": |
| 56 | return bsontype.MinKey |
| 57 | case "$maxKey": |
| 58 | return bsontype.MaxKey |
| 59 | case "$undefined": |
| 60 | return bsontype.Undefined |
| 61 | } |
| 62 | |
| 63 | return bsontype.EmbeddedDocument |
| 64 | } |
| 65 | |
| 66 | func (ejv *extJSONValue) parseBinary() (b []byte, subType byte, err error) { |
| 67 | if ejv.t != bsontype.EmbeddedDocument { |
| 68 | return nil, 0, fmt.Errorf("$binary value should be object, but instead is %s", ejv.t) |
| 69 | } |
| 70 | |
| 71 | binObj := ejv.v.(*extJSONObject) |
| 72 | bFound := false |
| 73 | stFound := false |
| 74 | |
| 75 | for i, key := range binObj.keys { |
| 76 | val := binObj.values[i] |
| 77 | |
| 78 | switch key { |
| 79 | case "base64": |
| 80 | if bFound { |
| 81 | return nil, 0, errors.New("duplicate base64 key in $binary") |
| 82 | } |
| 83 | |
| 84 | if val.t != bsontype.String { |
| 85 | return nil, 0, fmt.Errorf("$binary base64 value should be string, but instead is %s", val.t) |
| 86 | } |
| 87 | |
| 88 | base64Bytes, err := base64.StdEncoding.DecodeString(val.v.(string)) |
| 89 | if err != nil { |
| 90 | return nil, 0, fmt.Errorf("invalid $binary base64 string: %s", val.v.(string)) |
| 91 | } |
| 92 | |
| 93 | b = base64Bytes |
| 94 | bFound = true |
| 95 | case "subType": |
| 96 | if stFound { |
| 97 | return nil, 0, errors.New("duplicate subType key in $binary") |
| 98 | } |
| 99 | |
| 100 | if val.t != bsontype.String { |
| 101 | return nil, 0, fmt.Errorf("$binary subType value should be string, but instead is %s", val.t) |
| 102 | } |
| 103 | |
| 104 | i, err := strconv.ParseInt(val.v.(string), 16, 64) |
| 105 | if err != nil { |
| 106 | return nil, 0, fmt.Errorf("invalid $binary subType string: %s", val.v.(string)) |
| 107 | } |
| 108 | |
| 109 | subType = byte(i) |
| 110 | stFound = true |
| 111 | default: |
| 112 | return nil, 0, fmt.Errorf("invalid key in $binary object: %s", key) |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | if !bFound { |
| 117 | return nil, 0, errors.New("missing base64 field in $binary object") |
| 118 | } |
| 119 | |
| 120 | if !stFound { |
| 121 | return nil, 0, errors.New("missing subType field in $binary object") |
| 122 | |
| 123 | } |
| 124 | |
| 125 | return b, subType, nil |
| 126 | } |
| 127 | |
| 128 | func (ejv *extJSONValue) parseDBPointer() (ns string, oid primitive.ObjectID, err error) { |
| 129 | if ejv.t != bsontype.EmbeddedDocument { |
| 130 | return "", primitive.NilObjectID, fmt.Errorf("$dbPointer value should be object, but instead is %s", ejv.t) |
| 131 | } |
| 132 | |
| 133 | dbpObj := ejv.v.(*extJSONObject) |
| 134 | oidFound := false |
| 135 | nsFound := false |
| 136 | |
| 137 | for i, key := range dbpObj.keys { |
| 138 | val := dbpObj.values[i] |
| 139 | |
| 140 | switch key { |
| 141 | case "$ref": |
| 142 | if nsFound { |
| 143 | return "", primitive.NilObjectID, errors.New("duplicate $ref key in $dbPointer") |
| 144 | } |
| 145 | |
| 146 | if val.t != bsontype.String { |
| 147 | return "", primitive.NilObjectID, fmt.Errorf("$dbPointer $ref value should be string, but instead is %s", val.t) |
| 148 | } |
| 149 | |
| 150 | ns = val.v.(string) |
| 151 | nsFound = true |
| 152 | case "$id": |
| 153 | if oidFound { |
| 154 | return "", primitive.NilObjectID, errors.New("duplicate $id key in $dbPointer") |
| 155 | } |
| 156 | |
| 157 | if val.t != bsontype.String { |
| 158 | return "", primitive.NilObjectID, fmt.Errorf("$dbPointer $id value should be string, but instead is %s", val.t) |
| 159 | } |
| 160 | |
| 161 | oid, err = primitive.ObjectIDFromHex(val.v.(string)) |
| 162 | if err != nil { |
| 163 | return "", primitive.NilObjectID, err |
| 164 | } |
| 165 | |
| 166 | oidFound = true |
| 167 | default: |
| 168 | return "", primitive.NilObjectID, fmt.Errorf("invalid key in $dbPointer object: %s", key) |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | if !nsFound { |
| 173 | return "", oid, errors.New("missing $ref field in $dbPointer object") |
| 174 | } |
| 175 | |
| 176 | if !oidFound { |
| 177 | return "", oid, errors.New("missing $id field in $dbPointer object") |
| 178 | } |
| 179 | |
| 180 | return ns, oid, nil |
| 181 | } |
| 182 | |
| 183 | const rfc3339Milli = "2006-01-02T15:04:05.999Z07:00" |
| 184 | |
| 185 | func (ejv *extJSONValue) parseDateTime() (int64, error) { |
| 186 | switch ejv.t { |
| 187 | case bsontype.Int32: |
| 188 | return int64(ejv.v.(int32)), nil |
| 189 | case bsontype.Int64: |
| 190 | return ejv.v.(int64), nil |
| 191 | case bsontype.String: |
| 192 | return parseDatetimeString(ejv.v.(string)) |
| 193 | case bsontype.EmbeddedDocument: |
| 194 | return parseDatetimeObject(ejv.v.(*extJSONObject)) |
| 195 | default: |
| 196 | return 0, fmt.Errorf("$date value should be string or object, but instead is %s", ejv.t) |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | func parseDatetimeString(data string) (int64, error) { |
| 201 | t, err := time.Parse(rfc3339Milli, data) |
| 202 | if err != nil { |
| 203 | return 0, fmt.Errorf("invalid $date value string: %s", data) |
| 204 | } |
| 205 | |
| 206 | return t.UnixNano() / 1e6, nil |
| 207 | } |
| 208 | |
| 209 | func parseDatetimeObject(data *extJSONObject) (d int64, err error) { |
| 210 | dFound := false |
| 211 | |
| 212 | for i, key := range data.keys { |
| 213 | val := data.values[i] |
| 214 | |
| 215 | switch key { |
| 216 | case "$numberLong": |
| 217 | if dFound { |
| 218 | return 0, errors.New("duplicate $numberLong key in $date") |
| 219 | } |
| 220 | |
| 221 | if val.t != bsontype.String { |
| 222 | return 0, fmt.Errorf("$date $numberLong field should be string, but instead is %s", val.t) |
| 223 | } |
| 224 | |
| 225 | d, err = val.parseInt64() |
| 226 | if err != nil { |
| 227 | return 0, err |
| 228 | } |
| 229 | dFound = true |
| 230 | default: |
| 231 | return 0, fmt.Errorf("invalid key in $date object: %s", key) |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | if !dFound { |
| 236 | return 0, errors.New("missing $numberLong field in $date object") |
| 237 | } |
| 238 | |
| 239 | return d, nil |
| 240 | } |
| 241 | |
| 242 | func (ejv *extJSONValue) parseDecimal128() (primitive.Decimal128, error) { |
| 243 | if ejv.t != bsontype.String { |
| 244 | return primitive.Decimal128{}, fmt.Errorf("$numberDecimal value should be string, but instead is %s", ejv.t) |
| 245 | } |
| 246 | |
| 247 | d, err := primitive.ParseDecimal128(ejv.v.(string)) |
| 248 | if err != nil { |
| 249 | return primitive.Decimal128{}, fmt.Errorf("$invalid $numberDecimal string: %s", ejv.v.(string)) |
| 250 | } |
| 251 | |
| 252 | return d, nil |
| 253 | } |
| 254 | |
| 255 | func (ejv *extJSONValue) parseDouble() (float64, error) { |
| 256 | if ejv.t == bsontype.Double { |
| 257 | return ejv.v.(float64), nil |
| 258 | } |
| 259 | |
| 260 | if ejv.t != bsontype.String { |
| 261 | return 0, fmt.Errorf("$numberDouble value should be string, but instead is %s", ejv.t) |
| 262 | } |
| 263 | |
| 264 | switch string(ejv.v.(string)) { |
| 265 | case "Infinity": |
| 266 | return math.Inf(1), nil |
| 267 | case "-Infinity": |
| 268 | return math.Inf(-1), nil |
| 269 | case "NaN": |
| 270 | return math.NaN(), nil |
| 271 | } |
| 272 | |
| 273 | f, err := strconv.ParseFloat(ejv.v.(string), 64) |
| 274 | if err != nil { |
| 275 | return 0, err |
| 276 | } |
| 277 | |
| 278 | return f, nil |
| 279 | } |
| 280 | |
| 281 | func (ejv *extJSONValue) parseInt32() (int32, error) { |
| 282 | if ejv.t == bsontype.Int32 { |
| 283 | return ejv.v.(int32), nil |
| 284 | } |
| 285 | |
| 286 | if ejv.t != bsontype.String { |
| 287 | return 0, fmt.Errorf("$numberInt value should be string, but instead is %s", ejv.t) |
| 288 | } |
| 289 | |
| 290 | i, err := strconv.ParseInt(ejv.v.(string), 10, 64) |
| 291 | if err != nil { |
| 292 | return 0, err |
| 293 | } |
| 294 | |
| 295 | if i < math.MinInt32 || i > math.MaxInt32 { |
| 296 | return 0, fmt.Errorf("$numberInt value should be int32 but instead is int64: %d", i) |
| 297 | } |
| 298 | |
| 299 | return int32(i), nil |
| 300 | } |
| 301 | |
| 302 | func (ejv *extJSONValue) parseInt64() (int64, error) { |
| 303 | if ejv.t == bsontype.Int64 { |
| 304 | return ejv.v.(int64), nil |
| 305 | } |
| 306 | |
| 307 | if ejv.t != bsontype.String { |
| 308 | return 0, fmt.Errorf("$numberLong value should be string, but instead is %s", ejv.t) |
| 309 | } |
| 310 | |
| 311 | i, err := strconv.ParseInt(ejv.v.(string), 10, 64) |
| 312 | if err != nil { |
| 313 | return 0, err |
| 314 | } |
| 315 | |
| 316 | return i, nil |
| 317 | } |
| 318 | |
| 319 | func (ejv *extJSONValue) parseJavascript() (code string, err error) { |
| 320 | if ejv.t != bsontype.String { |
| 321 | return "", fmt.Errorf("$code value should be string, but instead is %s", ejv.t) |
| 322 | } |
| 323 | |
| 324 | return ejv.v.(string), nil |
| 325 | } |
| 326 | |
| 327 | func (ejv *extJSONValue) parseMinMaxKey(minmax string) error { |
| 328 | if ejv.t != bsontype.Int32 { |
| 329 | return fmt.Errorf("$%sKey value should be int32, but instead is %s", minmax, ejv.t) |
| 330 | } |
| 331 | |
| 332 | if ejv.v.(int32) != 1 { |
| 333 | return fmt.Errorf("$%sKey value must be 1, but instead is %d", minmax, ejv.v.(int32)) |
| 334 | } |
| 335 | |
| 336 | return nil |
| 337 | } |
| 338 | |
| 339 | func (ejv *extJSONValue) parseObjectID() (primitive.ObjectID, error) { |
| 340 | if ejv.t != bsontype.String { |
| 341 | return primitive.NilObjectID, fmt.Errorf("$oid value should be string, but instead is %s", ejv.t) |
| 342 | } |
| 343 | |
| 344 | return primitive.ObjectIDFromHex(ejv.v.(string)) |
| 345 | } |
| 346 | |
| 347 | func (ejv *extJSONValue) parseRegex() (pattern, options string, err error) { |
| 348 | if ejv.t != bsontype.EmbeddedDocument { |
| 349 | return "", "", fmt.Errorf("$regularExpression value should be object, but instead is %s", ejv.t) |
| 350 | } |
| 351 | |
| 352 | regexObj := ejv.v.(*extJSONObject) |
| 353 | patFound := false |
| 354 | optFound := false |
| 355 | |
| 356 | for i, key := range regexObj.keys { |
| 357 | val := regexObj.values[i] |
| 358 | |
| 359 | switch string(key) { |
| 360 | case "pattern": |
| 361 | if patFound { |
| 362 | return "", "", errors.New("duplicate pattern key in $regularExpression") |
| 363 | } |
| 364 | |
| 365 | if val.t != bsontype.String { |
| 366 | return "", "", fmt.Errorf("$regularExpression pattern value should be string, but instead is %s", val.t) |
| 367 | } |
| 368 | |
| 369 | pattern = val.v.(string) |
| 370 | patFound = true |
| 371 | case "options": |
| 372 | if optFound { |
| 373 | return "", "", errors.New("duplicate options key in $regularExpression") |
| 374 | } |
| 375 | |
| 376 | if val.t != bsontype.String { |
| 377 | return "", "", fmt.Errorf("$regularExpression options value should be string, but instead is %s", val.t) |
| 378 | } |
| 379 | |
| 380 | options = val.v.(string) |
| 381 | optFound = true |
| 382 | default: |
| 383 | return "", "", fmt.Errorf("invalid key in $regularExpression object: %s", key) |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | if !patFound { |
| 388 | return "", "", errors.New("missing pattern field in $regularExpression object") |
| 389 | } |
| 390 | |
| 391 | if !optFound { |
| 392 | return "", "", errors.New("missing options field in $regularExpression object") |
| 393 | |
| 394 | } |
| 395 | |
| 396 | return pattern, options, nil |
| 397 | } |
| 398 | |
| 399 | func (ejv *extJSONValue) parseSymbol() (string, error) { |
| 400 | if ejv.t != bsontype.String { |
| 401 | return "", fmt.Errorf("$symbol value should be string, but instead is %s", ejv.t) |
| 402 | } |
| 403 | |
| 404 | return ejv.v.(string), nil |
| 405 | } |
| 406 | |
| 407 | func (ejv *extJSONValue) parseTimestamp() (t, i uint32, err error) { |
| 408 | if ejv.t != bsontype.EmbeddedDocument { |
| 409 | return 0, 0, fmt.Errorf("$timestamp value should be object, but instead is %s", ejv.t) |
| 410 | } |
| 411 | |
| 412 | handleKey := func(key string, val *extJSONValue, flag bool) (uint32, error) { |
| 413 | if flag { |
| 414 | return 0, fmt.Errorf("duplicate %s key in $timestamp", key) |
| 415 | } |
| 416 | |
| 417 | switch val.t { |
| 418 | case bsontype.Int32: |
| 419 | if val.v.(int32) < 0 { |
| 420 | return 0, fmt.Errorf("$timestamp %s number should be uint32: %s", key, string(val.v.(int32))) |
| 421 | } |
| 422 | |
| 423 | return uint32(val.v.(int32)), nil |
| 424 | case bsontype.Int64: |
| 425 | if val.v.(int64) < 0 || uint32(val.v.(int64)) > math.MaxUint32 { |
| 426 | return 0, fmt.Errorf("$timestamp %s number should be uint32: %s", key, string(val.v.(int32))) |
| 427 | } |
| 428 | |
| 429 | return uint32(val.v.(int64)), nil |
| 430 | default: |
| 431 | return 0, fmt.Errorf("$timestamp %s value should be uint32, but instead is %s", key, val.t) |
| 432 | } |
| 433 | } |
| 434 | |
| 435 | tsObj := ejv.v.(*extJSONObject) |
| 436 | tFound := false |
| 437 | iFound := false |
| 438 | |
| 439 | for j, key := range tsObj.keys { |
| 440 | val := tsObj.values[j] |
| 441 | |
| 442 | switch key { |
| 443 | case "t": |
| 444 | if t, err = handleKey(key, val, tFound); err != nil { |
| 445 | return 0, 0, err |
| 446 | } |
| 447 | |
| 448 | tFound = true |
| 449 | case "i": |
| 450 | if i, err = handleKey(key, val, iFound); err != nil { |
| 451 | return 0, 0, err |
| 452 | } |
| 453 | |
| 454 | iFound = true |
| 455 | default: |
| 456 | return 0, 0, fmt.Errorf("invalid key in $timestamp object: %s", key) |
| 457 | } |
| 458 | } |
| 459 | |
| 460 | if !tFound { |
| 461 | return 0, 0, errors.New("missing t field in $timestamp object") |
| 462 | } |
| 463 | |
| 464 | if !iFound { |
| 465 | return 0, 0, errors.New("missing i field in $timestamp object") |
| 466 | } |
| 467 | |
| 468 | return t, i, nil |
| 469 | } |
| 470 | |
| 471 | func (ejv *extJSONValue) parseUndefined() error { |
| 472 | if ejv.t != bsontype.Boolean { |
| 473 | return fmt.Errorf("undefined value should be boolean, but instead is %s", ejv.t) |
| 474 | } |
| 475 | |
| 476 | if !ejv.v.(bool) { |
| 477 | return fmt.Errorf("$undefined balue boolean should be true, but instead is %v", ejv.v.(bool)) |
| 478 | } |
| 479 | |
| 480 | return nil |
| 481 | } |