Serge Bazanski | cc25bdf | 2018-10-25 14:02:58 +0200 | [diff] [blame] | 1 | // Package govalidator is package of validators and sanitizers for strings, structs and collections. |
| 2 | package govalidator |
| 3 | |
| 4 | import ( |
| 5 | "bytes" |
| 6 | "crypto/rsa" |
| 7 | "crypto/x509" |
| 8 | "encoding/base64" |
| 9 | "encoding/json" |
| 10 | "encoding/pem" |
| 11 | "fmt" |
| 12 | "io/ioutil" |
| 13 | "net" |
| 14 | "net/url" |
| 15 | "reflect" |
| 16 | "regexp" |
| 17 | "sort" |
| 18 | "strconv" |
| 19 | "strings" |
| 20 | "time" |
| 21 | "unicode" |
| 22 | "unicode/utf8" |
| 23 | ) |
| 24 | |
| 25 | var ( |
| 26 | fieldsRequiredByDefault bool |
| 27 | notNumberRegexp = regexp.MustCompile("[^0-9]+") |
| 28 | whiteSpacesAndMinus = regexp.MustCompile("[\\s-]+") |
| 29 | paramsRegexp = regexp.MustCompile("\\(.*\\)$") |
| 30 | ) |
| 31 | |
| 32 | const maxURLRuneCount = 2083 |
| 33 | const minURLRuneCount = 3 |
| 34 | const RF3339WithoutZone = "2006-01-02T15:04:05" |
| 35 | |
| 36 | // SetFieldsRequiredByDefault causes validation to fail when struct fields |
| 37 | // do not include validations or are not explicitly marked as exempt (using `valid:"-"` or `valid:"email,optional"`). |
| 38 | // This struct definition will fail govalidator.ValidateStruct() (and the field values do not matter): |
| 39 | // type exampleStruct struct { |
| 40 | // Name string `` |
| 41 | // Email string `valid:"email"` |
| 42 | // This, however, will only fail when Email is empty or an invalid email address: |
| 43 | // type exampleStruct2 struct { |
| 44 | // Name string `valid:"-"` |
| 45 | // Email string `valid:"email"` |
| 46 | // Lastly, this will only fail when Email is an invalid email address but not when it's empty: |
| 47 | // type exampleStruct2 struct { |
| 48 | // Name string `valid:"-"` |
| 49 | // Email string `valid:"email,optional"` |
| 50 | func SetFieldsRequiredByDefault(value bool) { |
| 51 | fieldsRequiredByDefault = value |
| 52 | } |
| 53 | |
| 54 | // IsEmail check if the string is an email. |
| 55 | func IsEmail(email string) bool { |
| 56 | if len(email) < 6 || len(email) > 254 { |
| 57 | return false |
| 58 | } |
| 59 | at := strings.LastIndex(email, "@") |
| 60 | if at <= 0 || at > len(email)-3 { |
| 61 | return false |
| 62 | } |
| 63 | user := email[:at] |
| 64 | host := email[at+1:] |
| 65 | if len(user) > 64 { |
| 66 | return false |
| 67 | } |
| 68 | if userDotRegexp.MatchString(user) || !userRegexp.MatchString(user) || !hostRegexp.MatchString(host) { |
| 69 | return false |
| 70 | } |
| 71 | switch host { |
| 72 | case "localhost", "example.com": |
| 73 | return true |
| 74 | } |
| 75 | if _, err := net.LookupMX(host); err != nil { |
| 76 | if _, err := net.LookupIP(host); err != nil { |
| 77 | return false |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | return true |
| 82 | } |
| 83 | |
| 84 | // IsURL check if the string is an URL. |
| 85 | func IsURL(str string) bool { |
| 86 | if str == "" || utf8.RuneCountInString(str) >= maxURLRuneCount || len(str) <= minURLRuneCount || strings.HasPrefix(str, ".") { |
| 87 | return false |
| 88 | } |
| 89 | strTemp := str |
| 90 | if strings.Index(str, ":") >= 0 && strings.Index(str, "://") == -1 { |
| 91 | // support no indicated urlscheme but with colon for port number |
| 92 | // http:// is appended so url.Parse will succeed, strTemp used so it does not impact rxURL.MatchString |
| 93 | strTemp = "http://" + str |
| 94 | } |
| 95 | u, err := url.Parse(strTemp) |
| 96 | if err != nil { |
| 97 | return false |
| 98 | } |
| 99 | if strings.HasPrefix(u.Host, ".") { |
| 100 | return false |
| 101 | } |
| 102 | if u.Host == "" && (u.Path != "" && !strings.Contains(u.Path, ".")) { |
| 103 | return false |
| 104 | } |
| 105 | return rxURL.MatchString(str) |
| 106 | } |
| 107 | |
| 108 | // IsRequestURL check if the string rawurl, assuming |
| 109 | // it was received in an HTTP request, is a valid |
| 110 | // URL confirm to RFC 3986 |
| 111 | func IsRequestURL(rawurl string) bool { |
| 112 | url, err := url.ParseRequestURI(rawurl) |
| 113 | if err != nil { |
| 114 | return false //Couldn't even parse the rawurl |
| 115 | } |
| 116 | if len(url.Scheme) == 0 { |
| 117 | return false //No Scheme found |
| 118 | } |
| 119 | return true |
| 120 | } |
| 121 | |
| 122 | // IsRequestURI check if the string rawurl, assuming |
| 123 | // it was received in an HTTP request, is an |
| 124 | // absolute URI or an absolute path. |
| 125 | func IsRequestURI(rawurl string) bool { |
| 126 | _, err := url.ParseRequestURI(rawurl) |
| 127 | return err == nil |
| 128 | } |
| 129 | |
| 130 | // IsAlpha check if the string contains only letters (a-zA-Z). Empty string is valid. |
| 131 | func IsAlpha(str string) bool { |
| 132 | if IsNull(str) { |
| 133 | return true |
| 134 | } |
| 135 | return rxAlpha.MatchString(str) |
| 136 | } |
| 137 | |
| 138 | //IsUTFLetter check if the string contains only unicode letter characters. |
| 139 | //Similar to IsAlpha but for all languages. Empty string is valid. |
| 140 | func IsUTFLetter(str string) bool { |
| 141 | if IsNull(str) { |
| 142 | return true |
| 143 | } |
| 144 | |
| 145 | for _, c := range str { |
| 146 | if !unicode.IsLetter(c) { |
| 147 | return false |
| 148 | } |
| 149 | } |
| 150 | return true |
| 151 | |
| 152 | } |
| 153 | |
| 154 | // IsAlphanumeric check if the string contains only letters and numbers. Empty string is valid. |
| 155 | func IsAlphanumeric(str string) bool { |
| 156 | if IsNull(str) { |
| 157 | return true |
| 158 | } |
| 159 | return rxAlphanumeric.MatchString(str) |
| 160 | } |
| 161 | |
| 162 | // IsUTFLetterNumeric check if the string contains only unicode letters and numbers. Empty string is valid. |
| 163 | func IsUTFLetterNumeric(str string) bool { |
| 164 | if IsNull(str) { |
| 165 | return true |
| 166 | } |
| 167 | for _, c := range str { |
| 168 | if !unicode.IsLetter(c) && !unicode.IsNumber(c) { //letters && numbers are ok |
| 169 | return false |
| 170 | } |
| 171 | } |
| 172 | return true |
| 173 | |
| 174 | } |
| 175 | |
| 176 | // IsNumeric check if the string contains only numbers. Empty string is valid. |
| 177 | func IsNumeric(str string) bool { |
| 178 | if IsNull(str) { |
| 179 | return true |
| 180 | } |
| 181 | return rxNumeric.MatchString(str) |
| 182 | } |
| 183 | |
| 184 | // IsUTFNumeric check if the string contains only unicode numbers of any kind. |
| 185 | // Numbers can be 0-9 but also Fractions ¾,Roman Ⅸ and Hangzhou 〩. Empty string is valid. |
| 186 | func IsUTFNumeric(str string) bool { |
| 187 | if IsNull(str) { |
| 188 | return true |
| 189 | } |
| 190 | if strings.IndexAny(str, "+-") > 0 { |
| 191 | return false |
| 192 | } |
| 193 | if len(str) > 1 { |
| 194 | str = strings.TrimPrefix(str, "-") |
| 195 | str = strings.TrimPrefix(str, "+") |
| 196 | } |
| 197 | for _, c := range str { |
| 198 | if unicode.IsNumber(c) == false { //numbers && minus sign are ok |
| 199 | return false |
| 200 | } |
| 201 | } |
| 202 | return true |
| 203 | |
| 204 | } |
| 205 | |
| 206 | // IsUTFDigit check if the string contains only unicode radix-10 decimal digits. Empty string is valid. |
| 207 | func IsUTFDigit(str string) bool { |
| 208 | if IsNull(str) { |
| 209 | return true |
| 210 | } |
| 211 | if strings.IndexAny(str, "+-") > 0 { |
| 212 | return false |
| 213 | } |
| 214 | if len(str) > 1 { |
| 215 | str = strings.TrimPrefix(str, "-") |
| 216 | str = strings.TrimPrefix(str, "+") |
| 217 | } |
| 218 | for _, c := range str { |
| 219 | if !unicode.IsDigit(c) { //digits && minus sign are ok |
| 220 | return false |
| 221 | } |
| 222 | } |
| 223 | return true |
| 224 | |
| 225 | } |
| 226 | |
| 227 | // IsHexadecimal check if the string is a hexadecimal number. |
| 228 | func IsHexadecimal(str string) bool { |
| 229 | return rxHexadecimal.MatchString(str) |
| 230 | } |
| 231 | |
| 232 | // IsHexcolor check if the string is a hexadecimal color. |
| 233 | func IsHexcolor(str string) bool { |
| 234 | return rxHexcolor.MatchString(str) |
| 235 | } |
| 236 | |
| 237 | // IsRGBcolor check if the string is a valid RGB color in form rgb(RRR, GGG, BBB). |
| 238 | func IsRGBcolor(str string) bool { |
| 239 | return rxRGBcolor.MatchString(str) |
| 240 | } |
| 241 | |
| 242 | // IsLowerCase check if the string is lowercase. Empty string is valid. |
| 243 | func IsLowerCase(str string) bool { |
| 244 | if IsNull(str) { |
| 245 | return true |
| 246 | } |
| 247 | return str == strings.ToLower(str) |
| 248 | } |
| 249 | |
| 250 | // IsUpperCase check if the string is uppercase. Empty string is valid. |
| 251 | func IsUpperCase(str string) bool { |
| 252 | if IsNull(str) { |
| 253 | return true |
| 254 | } |
| 255 | return str == strings.ToUpper(str) |
| 256 | } |
| 257 | |
| 258 | // HasLowerCase check if the string contains at least 1 lowercase. Empty string is valid. |
| 259 | func HasLowerCase(str string) bool { |
| 260 | if IsNull(str) { |
| 261 | return true |
| 262 | } |
| 263 | return rxHasLowerCase.MatchString(str) |
| 264 | } |
| 265 | |
| 266 | // HasUpperCase check if the string contians as least 1 uppercase. Empty string is valid. |
| 267 | func HasUpperCase(str string) bool { |
| 268 | if IsNull(str) { |
| 269 | return true |
| 270 | } |
| 271 | return rxHasUpperCase.MatchString(str) |
| 272 | } |
| 273 | |
| 274 | // IsInt check if the string is an integer. Empty string is valid. |
| 275 | func IsInt(str string) bool { |
| 276 | if IsNull(str) { |
| 277 | return true |
| 278 | } |
| 279 | return rxInt.MatchString(str) |
| 280 | } |
| 281 | |
| 282 | // IsFloat check if the string is a float. |
| 283 | func IsFloat(str string) bool { |
| 284 | return str != "" && rxFloat.MatchString(str) |
| 285 | } |
| 286 | |
| 287 | // IsDivisibleBy check if the string is a number that's divisible by another. |
| 288 | // If second argument is not valid integer or zero, it's return false. |
| 289 | // Otherwise, if first argument is not valid integer or zero, it's return true (Invalid string converts to zero). |
| 290 | func IsDivisibleBy(str, num string) bool { |
| 291 | f, _ := ToFloat(str) |
| 292 | p := int64(f) |
| 293 | q, _ := ToInt(num) |
| 294 | if q == 0 { |
| 295 | return false |
| 296 | } |
| 297 | return (p == 0) || (p%q == 0) |
| 298 | } |
| 299 | |
| 300 | // IsNull check if the string is null. |
| 301 | func IsNull(str string) bool { |
| 302 | return len(str) == 0 |
| 303 | } |
| 304 | |
| 305 | // IsByteLength check if the string's length (in bytes) falls in a range. |
| 306 | func IsByteLength(str string, min, max int) bool { |
| 307 | return len(str) >= min && len(str) <= max |
| 308 | } |
| 309 | |
| 310 | // IsUUIDv3 check if the string is a UUID version 3. |
| 311 | func IsUUIDv3(str string) bool { |
| 312 | return rxUUID3.MatchString(str) |
| 313 | } |
| 314 | |
| 315 | // IsUUIDv4 check if the string is a UUID version 4. |
| 316 | func IsUUIDv4(str string) bool { |
| 317 | return rxUUID4.MatchString(str) |
| 318 | } |
| 319 | |
| 320 | // IsUUIDv5 check if the string is a UUID version 5. |
| 321 | func IsUUIDv5(str string) bool { |
| 322 | return rxUUID5.MatchString(str) |
| 323 | } |
| 324 | |
| 325 | // IsUUID check if the string is a UUID (version 3, 4 or 5). |
| 326 | func IsUUID(str string) bool { |
| 327 | return rxUUID.MatchString(str) |
| 328 | } |
| 329 | |
| 330 | // IsCreditCard check if the string is a credit card. |
| 331 | func IsCreditCard(str string) bool { |
| 332 | sanitized := notNumberRegexp.ReplaceAllString(str, "") |
| 333 | if !rxCreditCard.MatchString(sanitized) { |
| 334 | return false |
| 335 | } |
| 336 | var sum int64 |
| 337 | var digit string |
| 338 | var tmpNum int64 |
| 339 | var shouldDouble bool |
| 340 | for i := len(sanitized) - 1; i >= 0; i-- { |
| 341 | digit = sanitized[i:(i + 1)] |
| 342 | tmpNum, _ = ToInt(digit) |
| 343 | if shouldDouble { |
| 344 | tmpNum *= 2 |
| 345 | if tmpNum >= 10 { |
| 346 | sum += ((tmpNum % 10) + 1) |
| 347 | } else { |
| 348 | sum += tmpNum |
| 349 | } |
| 350 | } else { |
| 351 | sum += tmpNum |
| 352 | } |
| 353 | shouldDouble = !shouldDouble |
| 354 | } |
| 355 | |
| 356 | if sum%10 == 0 { |
| 357 | return true |
| 358 | } |
| 359 | return false |
| 360 | } |
| 361 | |
| 362 | // IsISBN10 check if the string is an ISBN version 10. |
| 363 | func IsISBN10(str string) bool { |
| 364 | return IsISBN(str, 10) |
| 365 | } |
| 366 | |
| 367 | // IsISBN13 check if the string is an ISBN version 13. |
| 368 | func IsISBN13(str string) bool { |
| 369 | return IsISBN(str, 13) |
| 370 | } |
| 371 | |
| 372 | // IsISBN check if the string is an ISBN (version 10 or 13). |
| 373 | // If version value is not equal to 10 or 13, it will be check both variants. |
| 374 | func IsISBN(str string, version int) bool { |
| 375 | sanitized := whiteSpacesAndMinus.ReplaceAllString(str, "") |
| 376 | var checksum int32 |
| 377 | var i int32 |
| 378 | if version == 10 { |
| 379 | if !rxISBN10.MatchString(sanitized) { |
| 380 | return false |
| 381 | } |
| 382 | for i = 0; i < 9; i++ { |
| 383 | checksum += (i + 1) * int32(sanitized[i]-'0') |
| 384 | } |
| 385 | if sanitized[9] == 'X' { |
| 386 | checksum += 10 * 10 |
| 387 | } else { |
| 388 | checksum += 10 * int32(sanitized[9]-'0') |
| 389 | } |
| 390 | if checksum%11 == 0 { |
| 391 | return true |
| 392 | } |
| 393 | return false |
| 394 | } else if version == 13 { |
| 395 | if !rxISBN13.MatchString(sanitized) { |
| 396 | return false |
| 397 | } |
| 398 | factor := []int32{1, 3} |
| 399 | for i = 0; i < 12; i++ { |
| 400 | checksum += factor[i%2] * int32(sanitized[i]-'0') |
| 401 | } |
| 402 | if (int32(sanitized[12]-'0'))-((10-(checksum%10))%10) == 0 { |
| 403 | return true |
| 404 | } |
| 405 | return false |
| 406 | } |
| 407 | return IsISBN(str, 10) || IsISBN(str, 13) |
| 408 | } |
| 409 | |
| 410 | // IsJSON check if the string is valid JSON (note: uses json.Unmarshal). |
| 411 | func IsJSON(str string) bool { |
| 412 | var js json.RawMessage |
| 413 | return json.Unmarshal([]byte(str), &js) == nil |
| 414 | } |
| 415 | |
| 416 | // IsMultibyte check if the string contains one or more multibyte chars. Empty string is valid. |
| 417 | func IsMultibyte(str string) bool { |
| 418 | if IsNull(str) { |
| 419 | return true |
| 420 | } |
| 421 | return rxMultibyte.MatchString(str) |
| 422 | } |
| 423 | |
| 424 | // IsASCII check if the string contains ASCII chars only. Empty string is valid. |
| 425 | func IsASCII(str string) bool { |
| 426 | if IsNull(str) { |
| 427 | return true |
| 428 | } |
| 429 | return rxASCII.MatchString(str) |
| 430 | } |
| 431 | |
| 432 | // IsPrintableASCII check if the string contains printable ASCII chars only. Empty string is valid. |
| 433 | func IsPrintableASCII(str string) bool { |
| 434 | if IsNull(str) { |
| 435 | return true |
| 436 | } |
| 437 | return rxPrintableASCII.MatchString(str) |
| 438 | } |
| 439 | |
| 440 | // IsFullWidth check if the string contains any full-width chars. Empty string is valid. |
| 441 | func IsFullWidth(str string) bool { |
| 442 | if IsNull(str) { |
| 443 | return true |
| 444 | } |
| 445 | return rxFullWidth.MatchString(str) |
| 446 | } |
| 447 | |
| 448 | // IsHalfWidth check if the string contains any half-width chars. Empty string is valid. |
| 449 | func IsHalfWidth(str string) bool { |
| 450 | if IsNull(str) { |
| 451 | return true |
| 452 | } |
| 453 | return rxHalfWidth.MatchString(str) |
| 454 | } |
| 455 | |
| 456 | // IsVariableWidth check if the string contains a mixture of full and half-width chars. Empty string is valid. |
| 457 | func IsVariableWidth(str string) bool { |
| 458 | if IsNull(str) { |
| 459 | return true |
| 460 | } |
| 461 | return rxHalfWidth.MatchString(str) && rxFullWidth.MatchString(str) |
| 462 | } |
| 463 | |
| 464 | // IsBase64 check if a string is base64 encoded. |
| 465 | func IsBase64(str string) bool { |
| 466 | return rxBase64.MatchString(str) |
| 467 | } |
| 468 | |
| 469 | // IsFilePath check is a string is Win or Unix file path and returns it's type. |
| 470 | func IsFilePath(str string) (bool, int) { |
| 471 | if rxWinPath.MatchString(str) { |
| 472 | //check windows path limit see: |
| 473 | // http://msdn.microsoft.com/en-us/library/aa365247(VS.85).aspx#maxpath |
| 474 | if len(str[3:]) > 32767 { |
| 475 | return false, Win |
| 476 | } |
| 477 | return true, Win |
| 478 | } else if rxUnixPath.MatchString(str) { |
| 479 | return true, Unix |
| 480 | } |
| 481 | return false, Unknown |
| 482 | } |
| 483 | |
| 484 | // IsDataURI checks if a string is base64 encoded data URI such as an image |
| 485 | func IsDataURI(str string) bool { |
| 486 | dataURI := strings.Split(str, ",") |
| 487 | if !rxDataURI.MatchString(dataURI[0]) { |
| 488 | return false |
| 489 | } |
| 490 | return IsBase64(dataURI[1]) |
| 491 | } |
| 492 | |
| 493 | // IsISO3166Alpha2 checks if a string is valid two-letter country code |
| 494 | func IsISO3166Alpha2(str string) bool { |
| 495 | for _, entry := range ISO3166List { |
| 496 | if str == entry.Alpha2Code { |
| 497 | return true |
| 498 | } |
| 499 | } |
| 500 | return false |
| 501 | } |
| 502 | |
| 503 | // IsISO3166Alpha3 checks if a string is valid three-letter country code |
| 504 | func IsISO3166Alpha3(str string) bool { |
| 505 | for _, entry := range ISO3166List { |
| 506 | if str == entry.Alpha3Code { |
| 507 | return true |
| 508 | } |
| 509 | } |
| 510 | return false |
| 511 | } |
| 512 | |
| 513 | // IsISO693Alpha2 checks if a string is valid two-letter language code |
| 514 | func IsISO693Alpha2(str string) bool { |
| 515 | for _, entry := range ISO693List { |
| 516 | if str == entry.Alpha2Code { |
| 517 | return true |
| 518 | } |
| 519 | } |
| 520 | return false |
| 521 | } |
| 522 | |
| 523 | // IsISO693Alpha3b checks if a string is valid three-letter language code |
| 524 | func IsISO693Alpha3b(str string) bool { |
| 525 | for _, entry := range ISO693List { |
| 526 | if str == entry.Alpha3bCode { |
| 527 | return true |
| 528 | } |
| 529 | } |
| 530 | return false |
| 531 | } |
| 532 | |
| 533 | // IsDNSName will validate the given string as a DNS name |
| 534 | func IsDNSName(str string) bool { |
| 535 | if str == "" || len(strings.Replace(str, ".", "", -1)) > 255 { |
| 536 | // constraints already violated |
| 537 | return false |
| 538 | } |
| 539 | return !IsIP(str) && rxDNSName.MatchString(str) |
| 540 | } |
| 541 | |
| 542 | // IsHash checks if a string is a hash of type algorithm. |
| 543 | // Algorithm is one of ['md4', 'md5', 'sha1', 'sha256', 'sha384', 'sha512', 'ripemd128', 'ripemd160', 'tiger128', 'tiger160', 'tiger192', 'crc32', 'crc32b'] |
| 544 | func IsHash(str string, algorithm string) bool { |
| 545 | len := "0" |
| 546 | algo := strings.ToLower(algorithm) |
| 547 | |
| 548 | if algo == "crc32" || algo == "crc32b" { |
| 549 | len = "8" |
| 550 | } else if algo == "md5" || algo == "md4" || algo == "ripemd128" || algo == "tiger128" { |
| 551 | len = "32" |
| 552 | } else if algo == "sha1" || algo == "ripemd160" || algo == "tiger160" { |
| 553 | len = "40" |
| 554 | } else if algo == "tiger192" { |
| 555 | len = "48" |
| 556 | } else if algo == "sha256" { |
| 557 | len = "64" |
| 558 | } else if algo == "sha384" { |
| 559 | len = "96" |
| 560 | } else if algo == "sha512" { |
| 561 | len = "128" |
| 562 | } else { |
| 563 | return false |
| 564 | } |
| 565 | |
| 566 | return Matches(str, "^[a-f0-9]{"+len+"}$") |
| 567 | } |
| 568 | |
| 569 | // IsDialString validates the given string for usage with the various Dial() functions |
| 570 | func IsDialString(str string) bool { |
| 571 | |
| 572 | if h, p, err := net.SplitHostPort(str); err == nil && h != "" && p != "" && (IsDNSName(h) || IsIP(h)) && IsPort(p) { |
| 573 | return true |
| 574 | } |
| 575 | |
| 576 | return false |
| 577 | } |
| 578 | |
| 579 | // IsIP checks if a string is either IP version 4 or 6. |
| 580 | func IsIP(str string) bool { |
| 581 | return net.ParseIP(str) != nil |
| 582 | } |
| 583 | |
| 584 | // IsPort checks if a string represents a valid port |
| 585 | func IsPort(str string) bool { |
| 586 | if i, err := strconv.Atoi(str); err == nil && i > 0 && i < 65536 { |
| 587 | return true |
| 588 | } |
| 589 | return false |
| 590 | } |
| 591 | |
| 592 | // IsIPv4 check if the string is an IP version 4. |
| 593 | func IsIPv4(str string) bool { |
| 594 | ip := net.ParseIP(str) |
| 595 | return ip != nil && strings.Contains(str, ".") |
| 596 | } |
| 597 | |
| 598 | // IsIPv6 check if the string is an IP version 6. |
| 599 | func IsIPv6(str string) bool { |
| 600 | ip := net.ParseIP(str) |
| 601 | return ip != nil && strings.Contains(str, ":") |
| 602 | } |
| 603 | |
| 604 | // IsCIDR check if the string is an valid CIDR notiation (IPV4 & IPV6) |
| 605 | func IsCIDR(str string) bool { |
| 606 | _, _, err := net.ParseCIDR(str) |
| 607 | return err == nil |
| 608 | } |
| 609 | |
| 610 | // IsMAC check if a string is valid MAC address. |
| 611 | // Possible MAC formats: |
| 612 | // 01:23:45:67:89:ab |
| 613 | // 01:23:45:67:89:ab:cd:ef |
| 614 | // 01-23-45-67-89-ab |
| 615 | // 01-23-45-67-89-ab-cd-ef |
| 616 | // 0123.4567.89ab |
| 617 | // 0123.4567.89ab.cdef |
| 618 | func IsMAC(str string) bool { |
| 619 | _, err := net.ParseMAC(str) |
| 620 | return err == nil |
| 621 | } |
| 622 | |
| 623 | // IsHost checks if the string is a valid IP (both v4 and v6) or a valid DNS name |
| 624 | func IsHost(str string) bool { |
| 625 | return IsIP(str) || IsDNSName(str) |
| 626 | } |
| 627 | |
| 628 | // IsMongoID check if the string is a valid hex-encoded representation of a MongoDB ObjectId. |
| 629 | func IsMongoID(str string) bool { |
| 630 | return rxHexadecimal.MatchString(str) && (len(str) == 24) |
| 631 | } |
| 632 | |
| 633 | // IsLatitude check if a string is valid latitude. |
| 634 | func IsLatitude(str string) bool { |
| 635 | return rxLatitude.MatchString(str) |
| 636 | } |
| 637 | |
| 638 | // IsLongitude check if a string is valid longitude. |
| 639 | func IsLongitude(str string) bool { |
| 640 | return rxLongitude.MatchString(str) |
| 641 | } |
| 642 | |
| 643 | // IsRsaPublicKey check if a string is valid public key with provided length |
| 644 | func IsRsaPublicKey(str string, keylen int) bool { |
| 645 | bb := bytes.NewBufferString(str) |
| 646 | pemBytes, err := ioutil.ReadAll(bb) |
| 647 | if err != nil { |
| 648 | return false |
| 649 | } |
| 650 | block, _ := pem.Decode(pemBytes) |
| 651 | if block != nil && block.Type != "PUBLIC KEY" { |
| 652 | return false |
| 653 | } |
| 654 | var der []byte |
| 655 | |
| 656 | if block != nil { |
| 657 | der = block.Bytes |
| 658 | } else { |
| 659 | der, err = base64.StdEncoding.DecodeString(str) |
| 660 | if err != nil { |
| 661 | return false |
| 662 | } |
| 663 | } |
| 664 | |
| 665 | key, err := x509.ParsePKIXPublicKey(der) |
| 666 | if err != nil { |
| 667 | return false |
| 668 | } |
| 669 | pubkey, ok := key.(*rsa.PublicKey) |
| 670 | if !ok { |
| 671 | return false |
| 672 | } |
| 673 | bitlen := len(pubkey.N.Bytes()) * 8 |
| 674 | return bitlen == int(keylen) |
| 675 | } |
| 676 | |
| 677 | func toJSONName(tag string) string { |
| 678 | if tag == "" { |
| 679 | return "" |
| 680 | } |
| 681 | |
| 682 | // JSON name always comes first. If there's no options then split[0] is |
| 683 | // JSON name, if JSON name is not set, then split[0] is an empty string. |
| 684 | split := strings.SplitN(tag, ",", 2) |
| 685 | |
| 686 | name := split[0] |
| 687 | |
| 688 | // However it is possible that the field is skipped when |
| 689 | // (de-)serializing from/to JSON, in which case assume that there is no |
| 690 | // tag name to use |
| 691 | if name == "-" { |
| 692 | return "" |
| 693 | } |
| 694 | return name |
| 695 | } |
| 696 | |
| 697 | // ValidateStruct use tags for fields. |
| 698 | // result will be equal to `false` if there are any errors. |
| 699 | func ValidateStruct(s interface{}) (bool, error) { |
| 700 | if s == nil { |
| 701 | return true, nil |
| 702 | } |
| 703 | result := true |
| 704 | var err error |
| 705 | val := reflect.ValueOf(s) |
| 706 | if val.Kind() == reflect.Interface || val.Kind() == reflect.Ptr { |
| 707 | val = val.Elem() |
| 708 | } |
| 709 | // we only accept structs |
| 710 | if val.Kind() != reflect.Struct { |
| 711 | return false, fmt.Errorf("function only accepts structs; got %s", val.Kind()) |
| 712 | } |
| 713 | var errs Errors |
| 714 | for i := 0; i < val.NumField(); i++ { |
| 715 | valueField := val.Field(i) |
| 716 | typeField := val.Type().Field(i) |
| 717 | if typeField.PkgPath != "" { |
| 718 | continue // Private field |
| 719 | } |
| 720 | structResult := true |
| 721 | if (valueField.Kind() == reflect.Struct || |
| 722 | (valueField.Kind() == reflect.Ptr && valueField.Elem().Kind() == reflect.Struct)) && |
| 723 | typeField.Tag.Get(tagName) != "-" { |
| 724 | var err error |
| 725 | structResult, err = ValidateStruct(valueField.Interface()) |
| 726 | if err != nil { |
| 727 | errs = append(errs, err) |
| 728 | } |
| 729 | } |
| 730 | resultField, err2 := typeCheck(valueField, typeField, val, nil) |
| 731 | if err2 != nil { |
| 732 | |
| 733 | // Replace structure name with JSON name if there is a tag on the variable |
| 734 | jsonTag := toJSONName(typeField.Tag.Get("json")) |
| 735 | if jsonTag != "" { |
| 736 | switch jsonError := err2.(type) { |
| 737 | case Error: |
| 738 | jsonError.Name = jsonTag |
| 739 | err2 = jsonError |
| 740 | case Errors: |
| 741 | for i2, err3 := range jsonError { |
| 742 | switch customErr := err3.(type) { |
| 743 | case Error: |
| 744 | customErr.Name = jsonTag |
| 745 | jsonError[i2] = customErr |
| 746 | } |
| 747 | } |
| 748 | |
| 749 | err2 = jsonError |
| 750 | } |
| 751 | } |
| 752 | |
| 753 | errs = append(errs, err2) |
| 754 | } |
| 755 | result = result && resultField && structResult |
| 756 | } |
| 757 | if len(errs) > 0 { |
| 758 | err = errs |
| 759 | } |
| 760 | return result, err |
| 761 | } |
| 762 | |
| 763 | // parseTagIntoMap parses a struct tag `valid:required~Some error message,length(2|3)` into map[string]string{"required": "Some error message", "length(2|3)": ""} |
| 764 | func parseTagIntoMap(tag string) tagOptionsMap { |
| 765 | optionsMap := make(tagOptionsMap) |
| 766 | options := strings.Split(tag, ",") |
| 767 | |
| 768 | for _, option := range options { |
| 769 | option = strings.TrimSpace(option) |
| 770 | |
| 771 | validationOptions := strings.Split(option, "~") |
| 772 | if !isValidTag(validationOptions[0]) { |
| 773 | continue |
| 774 | } |
| 775 | if len(validationOptions) == 2 { |
| 776 | optionsMap[validationOptions[0]] = validationOptions[1] |
| 777 | } else { |
| 778 | optionsMap[validationOptions[0]] = "" |
| 779 | } |
| 780 | } |
| 781 | return optionsMap |
| 782 | } |
| 783 | |
| 784 | func isValidTag(s string) bool { |
| 785 | if s == "" { |
| 786 | return false |
| 787 | } |
| 788 | for _, c := range s { |
| 789 | switch { |
| 790 | case strings.ContainsRune("\\'\"!#$%&()*+-./:<=>?@[]^_{|}~ ", c): |
| 791 | // Backslash and quote chars are reserved, but |
| 792 | // otherwise any punctuation chars are allowed |
| 793 | // in a tag name. |
| 794 | default: |
| 795 | if !unicode.IsLetter(c) && !unicode.IsDigit(c) { |
| 796 | return false |
| 797 | } |
| 798 | } |
| 799 | } |
| 800 | return true |
| 801 | } |
| 802 | |
| 803 | // IsSSN will validate the given string as a U.S. Social Security Number |
| 804 | func IsSSN(str string) bool { |
| 805 | if str == "" || len(str) != 11 { |
| 806 | return false |
| 807 | } |
| 808 | return rxSSN.MatchString(str) |
| 809 | } |
| 810 | |
| 811 | // IsSemver check if string is valid semantic version |
| 812 | func IsSemver(str string) bool { |
| 813 | return rxSemver.MatchString(str) |
| 814 | } |
| 815 | |
| 816 | // IsTime check if string is valid according to given format |
| 817 | func IsTime(str string, format string) bool { |
| 818 | _, err := time.Parse(format, str) |
| 819 | return err == nil |
| 820 | } |
| 821 | |
| 822 | // IsRFC3339 check if string is valid timestamp value according to RFC3339 |
| 823 | func IsRFC3339(str string) bool { |
| 824 | return IsTime(str, time.RFC3339) |
| 825 | } |
| 826 | |
| 827 | // IsRFC3339WithoutZone check if string is valid timestamp value according to RFC3339 which excludes the timezone. |
| 828 | func IsRFC3339WithoutZone(str string) bool { |
| 829 | return IsTime(str, RF3339WithoutZone) |
| 830 | } |
| 831 | |
| 832 | // IsISO4217 check if string is valid ISO currency code |
| 833 | func IsISO4217(str string) bool { |
| 834 | for _, currency := range ISO4217List { |
| 835 | if str == currency { |
| 836 | return true |
| 837 | } |
| 838 | } |
| 839 | |
| 840 | return false |
| 841 | } |
| 842 | |
| 843 | // ByteLength check string's length |
| 844 | func ByteLength(str string, params ...string) bool { |
| 845 | if len(params) == 2 { |
| 846 | min, _ := ToInt(params[0]) |
| 847 | max, _ := ToInt(params[1]) |
| 848 | return len(str) >= int(min) && len(str) <= int(max) |
| 849 | } |
| 850 | |
| 851 | return false |
| 852 | } |
| 853 | |
| 854 | // RuneLength check string's length |
| 855 | // Alias for StringLength |
| 856 | func RuneLength(str string, params ...string) bool { |
| 857 | return StringLength(str, params...) |
| 858 | } |
| 859 | |
| 860 | // IsRsaPub check whether string is valid RSA key |
| 861 | // Alias for IsRsaPublicKey |
| 862 | func IsRsaPub(str string, params ...string) bool { |
| 863 | if len(params) == 1 { |
| 864 | len, _ := ToInt(params[0]) |
| 865 | return IsRsaPublicKey(str, int(len)) |
| 866 | } |
| 867 | |
| 868 | return false |
| 869 | } |
| 870 | |
| 871 | // StringMatches checks if a string matches a given pattern. |
| 872 | func StringMatches(s string, params ...string) bool { |
| 873 | if len(params) == 1 { |
| 874 | pattern := params[0] |
| 875 | return Matches(s, pattern) |
| 876 | } |
| 877 | return false |
| 878 | } |
| 879 | |
| 880 | // StringLength check string's length (including multi byte strings) |
| 881 | func StringLength(str string, params ...string) bool { |
| 882 | |
| 883 | if len(params) == 2 { |
| 884 | strLength := utf8.RuneCountInString(str) |
| 885 | min, _ := ToInt(params[0]) |
| 886 | max, _ := ToInt(params[1]) |
| 887 | return strLength >= int(min) && strLength <= int(max) |
| 888 | } |
| 889 | |
| 890 | return false |
| 891 | } |
| 892 | |
| 893 | // Range check string's length |
| 894 | func Range(str string, params ...string) bool { |
| 895 | if len(params) == 2 { |
| 896 | value, _ := ToFloat(str) |
| 897 | min, _ := ToFloat(params[0]) |
| 898 | max, _ := ToFloat(params[1]) |
| 899 | return InRange(value, min, max) |
| 900 | } |
| 901 | |
| 902 | return false |
| 903 | } |
| 904 | |
| 905 | func isInRaw(str string, params ...string) bool { |
| 906 | if len(params) == 1 { |
| 907 | rawParams := params[0] |
| 908 | |
| 909 | parsedParams := strings.Split(rawParams, "|") |
| 910 | |
| 911 | return IsIn(str, parsedParams...) |
| 912 | } |
| 913 | |
| 914 | return false |
| 915 | } |
| 916 | |
| 917 | // IsIn check if string str is a member of the set of strings params |
| 918 | func IsIn(str string, params ...string) bool { |
| 919 | for _, param := range params { |
| 920 | if str == param { |
| 921 | return true |
| 922 | } |
| 923 | } |
| 924 | |
| 925 | return false |
| 926 | } |
| 927 | |
| 928 | func checkRequired(v reflect.Value, t reflect.StructField, options tagOptionsMap) (bool, error) { |
| 929 | if requiredOption, isRequired := options["required"]; isRequired { |
| 930 | if len(requiredOption) > 0 { |
| 931 | return false, Error{t.Name, fmt.Errorf(requiredOption), true, "required"} |
| 932 | } |
| 933 | return false, Error{t.Name, fmt.Errorf("non zero value required"), false, "required"} |
| 934 | } else if _, isOptional := options["optional"]; fieldsRequiredByDefault && !isOptional { |
| 935 | return false, Error{t.Name, fmt.Errorf("Missing required field"), false, "required"} |
| 936 | } |
| 937 | // not required and empty is valid |
| 938 | return true, nil |
| 939 | } |
| 940 | |
| 941 | func typeCheck(v reflect.Value, t reflect.StructField, o reflect.Value, options tagOptionsMap) (isValid bool, resultErr error) { |
| 942 | if !v.IsValid() { |
| 943 | return false, nil |
| 944 | } |
| 945 | |
| 946 | tag := t.Tag.Get(tagName) |
| 947 | |
| 948 | // Check if the field should be ignored |
| 949 | switch tag { |
| 950 | case "": |
| 951 | if !fieldsRequiredByDefault { |
| 952 | return true, nil |
| 953 | } |
| 954 | return false, Error{t.Name, fmt.Errorf("All fields are required to at least have one validation defined"), false, "required"} |
| 955 | case "-": |
| 956 | return true, nil |
| 957 | } |
| 958 | |
| 959 | isRootType := false |
| 960 | if options == nil { |
| 961 | isRootType = true |
| 962 | options = parseTagIntoMap(tag) |
| 963 | } |
| 964 | |
| 965 | if isEmptyValue(v) { |
| 966 | // an empty value is not validated, check only required |
| 967 | return checkRequired(v, t, options) |
| 968 | } |
| 969 | |
| 970 | var customTypeErrors Errors |
| 971 | for validatorName, customErrorMessage := range options { |
| 972 | if validatefunc, ok := CustomTypeTagMap.Get(validatorName); ok { |
| 973 | delete(options, validatorName) |
| 974 | |
| 975 | if result := validatefunc(v.Interface(), o.Interface()); !result { |
| 976 | if len(customErrorMessage) > 0 { |
| 977 | customTypeErrors = append(customTypeErrors, Error{Name: t.Name, Err: fmt.Errorf(customErrorMessage), CustomErrorMessageExists: true, Validator: stripParams(validatorName)}) |
| 978 | continue |
| 979 | } |
| 980 | customTypeErrors = append(customTypeErrors, Error{Name: t.Name, Err: fmt.Errorf("%s does not validate as %s", fmt.Sprint(v), validatorName), CustomErrorMessageExists: false, Validator: stripParams(validatorName)}) |
| 981 | } |
| 982 | } |
| 983 | } |
| 984 | |
| 985 | if len(customTypeErrors.Errors()) > 0 { |
| 986 | return false, customTypeErrors |
| 987 | } |
| 988 | |
| 989 | if isRootType { |
| 990 | // Ensure that we've checked the value by all specified validators before report that the value is valid |
| 991 | defer func() { |
| 992 | delete(options, "optional") |
| 993 | delete(options, "required") |
| 994 | |
| 995 | if isValid && resultErr == nil && len(options) != 0 { |
| 996 | for validator := range options { |
| 997 | isValid = false |
| 998 | resultErr = Error{t.Name, fmt.Errorf( |
| 999 | "The following validator is invalid or can't be applied to the field: %q", validator), false, stripParams(validator)} |
| 1000 | return |
| 1001 | } |
| 1002 | } |
| 1003 | }() |
| 1004 | } |
| 1005 | |
| 1006 | switch v.Kind() { |
| 1007 | case reflect.Bool, |
| 1008 | reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, |
| 1009 | reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr, |
| 1010 | reflect.Float32, reflect.Float64, |
| 1011 | reflect.String: |
| 1012 | // for each tag option check the map of validator functions |
| 1013 | for validatorSpec, customErrorMessage := range options { |
| 1014 | var negate bool |
| 1015 | validator := validatorSpec |
| 1016 | customMsgExists := len(customErrorMessage) > 0 |
| 1017 | |
| 1018 | // Check whether the tag looks like '!something' or 'something' |
| 1019 | if validator[0] == '!' { |
| 1020 | validator = validator[1:] |
| 1021 | negate = true |
| 1022 | } |
| 1023 | |
| 1024 | // Check for param validators |
| 1025 | for key, value := range ParamTagRegexMap { |
| 1026 | ps := value.FindStringSubmatch(validator) |
| 1027 | if len(ps) == 0 { |
| 1028 | continue |
| 1029 | } |
| 1030 | |
| 1031 | validatefunc, ok := ParamTagMap[key] |
| 1032 | if !ok { |
| 1033 | continue |
| 1034 | } |
| 1035 | |
| 1036 | delete(options, validatorSpec) |
| 1037 | |
| 1038 | switch v.Kind() { |
| 1039 | case reflect.String, |
| 1040 | reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, |
| 1041 | reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, |
| 1042 | reflect.Float32, reflect.Float64: |
| 1043 | |
| 1044 | field := fmt.Sprint(v) // make value into string, then validate with regex |
| 1045 | if result := validatefunc(field, ps[1:]...); (!result && !negate) || (result && negate) { |
| 1046 | if customMsgExists { |
| 1047 | return false, Error{t.Name, fmt.Errorf(customErrorMessage), customMsgExists, stripParams(validatorSpec)} |
| 1048 | } |
| 1049 | if negate { |
| 1050 | return false, Error{t.Name, fmt.Errorf("%s does validate as %s", field, validator), customMsgExists, stripParams(validatorSpec)} |
| 1051 | } |
| 1052 | return false, Error{t.Name, fmt.Errorf("%s does not validate as %s", field, validator), customMsgExists, stripParams(validatorSpec)} |
| 1053 | } |
| 1054 | default: |
| 1055 | // type not yet supported, fail |
| 1056 | return false, Error{t.Name, fmt.Errorf("Validator %s doesn't support kind %s", validator, v.Kind()), false, stripParams(validatorSpec)} |
| 1057 | } |
| 1058 | } |
| 1059 | |
| 1060 | if validatefunc, ok := TagMap[validator]; ok { |
| 1061 | delete(options, validatorSpec) |
| 1062 | |
| 1063 | switch v.Kind() { |
| 1064 | case reflect.String: |
| 1065 | field := fmt.Sprint(v) // make value into string, then validate with regex |
| 1066 | if result := validatefunc(field); !result && !negate || result && negate { |
| 1067 | if customMsgExists { |
| 1068 | return false, Error{t.Name, fmt.Errorf(customErrorMessage), customMsgExists, stripParams(validatorSpec)} |
| 1069 | } |
| 1070 | if negate { |
| 1071 | return false, Error{t.Name, fmt.Errorf("%s does validate as %s", field, validator), customMsgExists, stripParams(validatorSpec)} |
| 1072 | } |
| 1073 | return false, Error{t.Name, fmt.Errorf("%s does not validate as %s", field, validator), customMsgExists, stripParams(validatorSpec)} |
| 1074 | } |
| 1075 | default: |
| 1076 | //Not Yet Supported Types (Fail here!) |
| 1077 | err := fmt.Errorf("Validator %s doesn't support kind %s for value %v", validator, v.Kind(), v) |
| 1078 | return false, Error{t.Name, err, false, stripParams(validatorSpec)} |
| 1079 | } |
| 1080 | } |
| 1081 | } |
| 1082 | return true, nil |
| 1083 | case reflect.Map: |
| 1084 | if v.Type().Key().Kind() != reflect.String { |
| 1085 | return false, &UnsupportedTypeError{v.Type()} |
| 1086 | } |
| 1087 | var sv stringValues |
| 1088 | sv = v.MapKeys() |
| 1089 | sort.Sort(sv) |
| 1090 | result := true |
| 1091 | for _, k := range sv { |
| 1092 | var resultItem bool |
| 1093 | var err error |
| 1094 | if v.MapIndex(k).Kind() != reflect.Struct { |
| 1095 | resultItem, err = typeCheck(v.MapIndex(k), t, o, options) |
| 1096 | if err != nil { |
| 1097 | return false, err |
| 1098 | } |
| 1099 | } else { |
| 1100 | resultItem, err = ValidateStruct(v.MapIndex(k).Interface()) |
| 1101 | if err != nil { |
| 1102 | return false, err |
| 1103 | } |
| 1104 | } |
| 1105 | result = result && resultItem |
| 1106 | } |
| 1107 | return result, nil |
| 1108 | case reflect.Slice, reflect.Array: |
| 1109 | result := true |
| 1110 | for i := 0; i < v.Len(); i++ { |
| 1111 | var resultItem bool |
| 1112 | var err error |
| 1113 | if v.Index(i).Kind() != reflect.Struct { |
| 1114 | resultItem, err = typeCheck(v.Index(i), t, o, options) |
| 1115 | if err != nil { |
| 1116 | return false, err |
| 1117 | } |
| 1118 | } else { |
| 1119 | resultItem, err = ValidateStruct(v.Index(i).Interface()) |
| 1120 | if err != nil { |
| 1121 | return false, err |
| 1122 | } |
| 1123 | } |
| 1124 | result = result && resultItem |
| 1125 | } |
| 1126 | return result, nil |
| 1127 | case reflect.Interface: |
| 1128 | // If the value is an interface then encode its element |
| 1129 | if v.IsNil() { |
| 1130 | return true, nil |
| 1131 | } |
| 1132 | return ValidateStruct(v.Interface()) |
| 1133 | case reflect.Ptr: |
| 1134 | // If the value is a pointer then check its element |
| 1135 | if v.IsNil() { |
| 1136 | return true, nil |
| 1137 | } |
| 1138 | return typeCheck(v.Elem(), t, o, options) |
| 1139 | case reflect.Struct: |
| 1140 | return ValidateStruct(v.Interface()) |
| 1141 | default: |
| 1142 | return false, &UnsupportedTypeError{v.Type()} |
| 1143 | } |
| 1144 | } |
| 1145 | |
| 1146 | func stripParams(validatorString string) string { |
| 1147 | return paramsRegexp.ReplaceAllString(validatorString, "") |
| 1148 | } |
| 1149 | |
| 1150 | func isEmptyValue(v reflect.Value) bool { |
| 1151 | switch v.Kind() { |
| 1152 | case reflect.String, reflect.Array: |
| 1153 | return v.Len() == 0 |
| 1154 | case reflect.Map, reflect.Slice: |
| 1155 | return v.Len() == 0 || v.IsNil() |
| 1156 | case reflect.Bool: |
| 1157 | return !v.Bool() |
| 1158 | case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: |
| 1159 | return v.Int() == 0 |
| 1160 | case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr: |
| 1161 | return v.Uint() == 0 |
| 1162 | case reflect.Float32, reflect.Float64: |
| 1163 | return v.Float() == 0 |
| 1164 | case reflect.Interface, reflect.Ptr: |
| 1165 | return v.IsNil() |
| 1166 | } |
| 1167 | |
| 1168 | return reflect.DeepEqual(v.Interface(), reflect.Zero(v.Type()).Interface()) |
| 1169 | } |
| 1170 | |
| 1171 | // ErrorByField returns error for specified field of the struct |
| 1172 | // validated by ValidateStruct or empty string if there are no errors |
| 1173 | // or this field doesn't exists or doesn't have any errors. |
| 1174 | func ErrorByField(e error, field string) string { |
| 1175 | if e == nil { |
| 1176 | return "" |
| 1177 | } |
| 1178 | return ErrorsByField(e)[field] |
| 1179 | } |
| 1180 | |
| 1181 | // ErrorsByField returns map of errors of the struct validated |
| 1182 | // by ValidateStruct or empty map if there are no errors. |
| 1183 | func ErrorsByField(e error) map[string]string { |
| 1184 | m := make(map[string]string) |
| 1185 | if e == nil { |
| 1186 | return m |
| 1187 | } |
| 1188 | // prototype for ValidateStruct |
| 1189 | |
| 1190 | switch e.(type) { |
| 1191 | case Error: |
| 1192 | m[e.(Error).Name] = e.(Error).Err.Error() |
| 1193 | case Errors: |
| 1194 | for _, item := range e.(Errors).Errors() { |
| 1195 | n := ErrorsByField(item) |
| 1196 | for k, v := range n { |
| 1197 | m[k] = v |
| 1198 | } |
| 1199 | } |
| 1200 | } |
| 1201 | |
| 1202 | return m |
| 1203 | } |
| 1204 | |
| 1205 | // Error returns string equivalent for reflect.Type |
| 1206 | func (e *UnsupportedTypeError) Error() string { |
| 1207 | return "validator: unsupported type: " + e.Type.String() |
| 1208 | } |
| 1209 | |
| 1210 | func (sv stringValues) Len() int { return len(sv) } |
| 1211 | func (sv stringValues) Swap(i, j int) { sv[i], sv[j] = sv[j], sv[i] } |
| 1212 | func (sv stringValues) Less(i, j int) bool { return sv.get(i) < sv.get(j) } |
| 1213 | func (sv stringValues) get(i int) string { return sv[i].String() } |