string_validator

String validation and sanitization for Dart.

The is a new fork of validator.dart, which was originally a port of validator.js.

Validators

  • equals(String str, comparison) - check if the string matches the comparison.
  • contains(String str, seed) - check if the string contains the seed.
  • matches(String str, pattern) - check if string matches the pattern. matches('foobar', 'foo').
  • isEmail(String str) - check if the string is an email.
  • isURL(String str , options) - check if the string is an URL. options is an object which defaults to { protocols: ['http','https','ftp'], require_tld: true, require_protocol: false, allow_underscores: false }.
  • isFQDN(String str , options) - check if the string is a fully qualified domain name (e.g. domain.com). options is an object which defaults to { require_tld: true, allow_underscores: false }.
  • isIP(String str , version) - check if the string is an IP (version 4 or 6).
  • isAlpha(String str) - check if the string contains only letters (a-zA-Z).
  • isNumeric(String str) - check if the string contains only numbers.
  • isAlphanumeric(String str) - check if the string contains only letters and numbers.
  • isBase64(String str) - check if a string is base64 encoded.
  • isHexadecimal(String str) - check if the string is a hexadecimal number.
  • isHexColor(String str) - check if the string is a hexadecimal color.
  • isLowercase(String str) - check if the string is lowercase.
  • isUppercase(String str) - check if the string is uppercase.
  • isInt(String str) - check if the string is an integer.
  • isFloat(String str) - check if the string is a float.
  • isDivisibleBy(String str, number) - check if the string is a number that's divisible by another.
  • isNull(String str) - check if the string is null.
  • isLength(String str, min , max) - check if the string's length falls in a range. Note: this function takes into account surrogate pairs.
  • isByteLength(String str, min , max) - check if the string's length (in bytes) falls in a range.
  • isUUID(String str , version) - check if the string is a UUID (version 3, 4 or 5).
  • isDate(String str) - check if the string is a date.
  • isAfter(String str , date) - check if the string is a date that's after the specified date (defaults to now).
  • isBefore(String str , date) - check if the string is a date that's before the specified date.
  • isIn(String str, values) - check if the string is in a array of allowed values.
  • isCreditCard(String str) - check if the string is a credit card.
  • isISBN(String str , version) - check if the string is an ISBN (version 10 or 13).
  • isJSON(String str) - check if the string is valid JSON (note: uses JSON.parse).
  • isMultibyte(String str) - check if the string contains one or more multibyte chars.
  • isAscii(String str) - check if the string contains ASCII chars only.
  • isFullWidth(String str) - check if the string contains any full-width chars.
  • isHalfWidth(String str) - check if the string contains any half-width chars.
  • isVariableWidth(String str) - check if the string contains a mixture of full and half-width chars.
  • isSurrogatePair(String str) - check if the string contains any surrogate pairs chars.
  • isMongoId(String str) - check if the string is a valid hex-encoded representation of a mongoid.

Sanitizers

  • toString(String input) - convert the input to a string.
  • toDate(String input) - convert the input to a date, or null if the input is not a date.
  • toFloat(String input) - convert the input to a float, or NaN if the input is not a float.
  • toInt(String input , radix) - convert the input to an integer, or NaN if the input is not an integer.
  • toBoolean(String input , strict) - convert the input to a boolean. Everything except for '0', 'false' and '' returns true. In strict mode only '1' and 'true' return true.
  • trim(String input , chars) - trim characters (whitespace by default) from both sides of the input.
  • ltrim(String input , chars) - trim characters from the left-side of the input.
  • rtrim(String input , chars) - trim characters from the right-side of the input.
  • escape(String input) - replace <, >, &, ' and " with HTML entities.
  • stripLow(String input , keep_new_lines) - remove characters with a numerical value < 32 and 127, mostly control characters. If keep_new_lines is true, newline characters are preserved (\n and \r, hex 0xA and 0xD). Unicode-safe in JavaScript.
  • whitelist(String input, chars) - remove characters that do not appear in the whitelist. The characters are used in a RegExp and so you will need to escape some chars, e.g. whitelist(String input, '\\').
  • blacklist(String input, chars) - remove characters that appear in the blacklist. The characters are used in a RegExp and so you will need to escape some chars, e.g. blacklist(String input, '\\').
  • normalizeEmail(String email , options) - canonicalize an email address. options is an object which defaults to { lowercase: true }. With lowercase set to true, the local part of the email address is lowercased for all domains; the hostname is always lowercased and the local part of the email address is always lowercased for hosts that are known to be case-insensitive (currently only GMail). Normalization follows special rules for known providers: currently, GMail addresses have dots removed in the local part and are stripped of tags (e.g. some.one+tag@gmail.com becomes someone@gmail.com) and all @googlemail.com addresses are normalized to @gmail.com.

Libraries

string_validator