1279 lines
34 KiB
Go
1279 lines
34 KiB
Go
// Package govalidator is package of validators and sanitizers for strings, structs and collections.
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package govalidator
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import (
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"bytes"
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"crypto/rsa"
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"crypto/x509"
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"encoding/base64"
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"encoding/json"
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"encoding/pem"
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"fmt"
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"io/ioutil"
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"net"
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"net/url"
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"reflect"
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"regexp"
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"sort"
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"strconv"
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"strings"
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"time"
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"unicode"
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"unicode/utf8"
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)
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var (
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fieldsRequiredByDefault bool
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nilPtrAllowedByRequired = false
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notNumberRegexp = regexp.MustCompile("[^0-9]+")
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whiteSpacesAndMinus = regexp.MustCompile(`[\s-]+`)
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paramsRegexp = regexp.MustCompile(`\(.*\)$`)
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)
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const maxURLRuneCount = 2083
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const minURLRuneCount = 3
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const RF3339WithoutZone = "2006-01-02T15:04:05"
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// SetFieldsRequiredByDefault causes validation to fail when struct fields
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// do not include validations or are not explicitly marked as exempt (using `valid:"-"` or `valid:"email,optional"`).
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// This struct definition will fail govalidator.ValidateStruct() (and the field values do not matter):
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// type exampleStruct struct {
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// Name string ``
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// Email string `valid:"email"`
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// This, however, will only fail when Email is empty or an invalid email address:
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// type exampleStruct2 struct {
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// Name string `valid:"-"`
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// Email string `valid:"email"`
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// Lastly, this will only fail when Email is an invalid email address but not when it's empty:
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// type exampleStruct2 struct {
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// Name string `valid:"-"`
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// Email string `valid:"email,optional"`
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func SetFieldsRequiredByDefault(value bool) {
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fieldsRequiredByDefault = value
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}
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// SetNilPtrAllowedByRequired causes validation to pass for nil ptrs when a field is set to required.
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// The validation will still reject ptr fields in their zero value state. Example with this enabled:
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// type exampleStruct struct {
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// Name *string `valid:"required"`
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// With `Name` set to "", this will be considered invalid input and will cause a validation error.
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// With `Name` set to nil, this will be considered valid by validation.
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// By default this is disabled.
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func SetNilPtrAllowedByRequired(value bool) {
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nilPtrAllowedByRequired = value
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}
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// IsEmail check if the string is an email.
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func IsEmail(str string) bool {
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// TODO uppercase letters are not supported
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return rxEmail.MatchString(str)
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}
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// IsExistingEmail check if the string is an email of existing domain
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func IsExistingEmail(email string) bool {
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if len(email) < 6 || len(email) > 254 {
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return false
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}
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at := strings.LastIndex(email, "@")
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if at <= 0 || at > len(email)-3 {
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return false
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}
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user := email[:at]
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host := email[at+1:]
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if len(user) > 64 {
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return false
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}
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if userDotRegexp.MatchString(user) || !userRegexp.MatchString(user) || !hostRegexp.MatchString(host) {
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return false
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}
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switch host {
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case "localhost", "example.com":
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return true
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}
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if _, err := net.LookupMX(host); err != nil {
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if _, err := net.LookupIP(host); err != nil {
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return false
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}
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}
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return true
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}
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// IsURL check if the string is an URL.
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func IsURL(str string) bool {
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if str == "" || utf8.RuneCountInString(str) >= maxURLRuneCount || len(str) <= minURLRuneCount || strings.HasPrefix(str, ".") {
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return false
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}
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strTemp := str
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if strings.Contains(str, ":") && !strings.Contains(str, "://") {
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// support no indicated urlscheme but with colon for port number
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// http:// is appended so url.Parse will succeed, strTemp used so it does not impact rxURL.MatchString
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strTemp = "http://" + str
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}
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u, err := url.Parse(strTemp)
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if err != nil {
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return false
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}
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if strings.HasPrefix(u.Host, ".") {
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return false
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}
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if u.Host == "" && (u.Path != "" && !strings.Contains(u.Path, ".")) {
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return false
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}
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return rxURL.MatchString(str)
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}
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// IsRequestURL check if the string rawurl, assuming
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// it was received in an HTTP request, is a valid
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// URL confirm to RFC 3986
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func IsRequestURL(rawurl string) bool {
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url, err := url.ParseRequestURI(rawurl)
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if err != nil {
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return false //Couldn't even parse the rawurl
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}
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if len(url.Scheme) == 0 {
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return false //No Scheme found
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}
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return true
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}
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// IsRequestURI check if the string rawurl, assuming
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// it was received in an HTTP request, is an
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// absolute URI or an absolute path.
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func IsRequestURI(rawurl string) bool {
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_, err := url.ParseRequestURI(rawurl)
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return err == nil
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}
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// IsAlpha check if the string contains only letters (a-zA-Z). Empty string is valid.
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func IsAlpha(str string) bool {
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if IsNull(str) {
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return true
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}
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return rxAlpha.MatchString(str)
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}
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//IsUTFLetter check if the string contains only unicode letter characters.
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//Similar to IsAlpha but for all languages. Empty string is valid.
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func IsUTFLetter(str string) bool {
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if IsNull(str) {
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return true
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}
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for _, c := range str {
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if !unicode.IsLetter(c) {
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return false
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}
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}
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return true
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}
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// IsAlphanumeric check if the string contains only letters and numbers. Empty string is valid.
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func IsAlphanumeric(str string) bool {
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if IsNull(str) {
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return true
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}
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return rxAlphanumeric.MatchString(str)
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}
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// IsUTFLetterNumeric check if the string contains only unicode letters and numbers. Empty string is valid.
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func IsUTFLetterNumeric(str string) bool {
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if IsNull(str) {
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return true
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}
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for _, c := range str {
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if !unicode.IsLetter(c) && !unicode.IsNumber(c) { //letters && numbers are ok
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return false
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}
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}
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return true
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}
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// IsNumeric check if the string contains only numbers. Empty string is valid.
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func IsNumeric(str string) bool {
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if IsNull(str) {
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return true
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}
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return rxNumeric.MatchString(str)
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}
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// IsUTFNumeric check if the string contains only unicode numbers of any kind.
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// Numbers can be 0-9 but also Fractions ¾,Roman Ⅸ and Hangzhou 〩. Empty string is valid.
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func IsUTFNumeric(str string) bool {
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if IsNull(str) {
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return true
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}
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if strings.IndexAny(str, "+-") > 0 {
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return false
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}
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if len(str) > 1 {
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str = strings.TrimPrefix(str, "-")
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str = strings.TrimPrefix(str, "+")
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}
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for _, c := range str {
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if !unicode.IsNumber(c) { //numbers && minus sign are ok
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return false
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}
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}
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return true
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}
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// IsUTFDigit check if the string contains only unicode radix-10 decimal digits. Empty string is valid.
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func IsUTFDigit(str string) bool {
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if IsNull(str) {
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return true
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}
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if strings.IndexAny(str, "+-") > 0 {
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return false
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}
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if len(str) > 1 {
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str = strings.TrimPrefix(str, "-")
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str = strings.TrimPrefix(str, "+")
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}
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for _, c := range str {
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if !unicode.IsDigit(c) { //digits && minus sign are ok
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return false
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}
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}
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return true
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}
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// IsHexadecimal check if the string is a hexadecimal number.
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func IsHexadecimal(str string) bool {
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return rxHexadecimal.MatchString(str)
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}
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// IsHexcolor check if the string is a hexadecimal color.
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func IsHexcolor(str string) bool {
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return rxHexcolor.MatchString(str)
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}
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// IsRGBcolor check if the string is a valid RGB color in form rgb(RRR, GGG, BBB).
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func IsRGBcolor(str string) bool {
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return rxRGBcolor.MatchString(str)
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}
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// IsLowerCase check if the string is lowercase. Empty string is valid.
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func IsLowerCase(str string) bool {
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if IsNull(str) {
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return true
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}
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return str == strings.ToLower(str)
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}
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// IsUpperCase check if the string is uppercase. Empty string is valid.
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func IsUpperCase(str string) bool {
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if IsNull(str) {
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return true
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}
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return str == strings.ToUpper(str)
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}
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// HasLowerCase check if the string contains at least 1 lowercase. Empty string is valid.
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func HasLowerCase(str string) bool {
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if IsNull(str) {
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return true
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}
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return rxHasLowerCase.MatchString(str)
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}
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// HasUpperCase check if the string contians as least 1 uppercase. Empty string is valid.
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func HasUpperCase(str string) bool {
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if IsNull(str) {
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return true
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}
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return rxHasUpperCase.MatchString(str)
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}
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// IsInt check if the string is an integer. Empty string is valid.
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func IsInt(str string) bool {
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if IsNull(str) {
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return true
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}
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return rxInt.MatchString(str)
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}
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// IsFloat check if the string is a float.
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func IsFloat(str string) bool {
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return str != "" && rxFloat.MatchString(str)
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}
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// IsDivisibleBy check if the string is a number that's divisible by another.
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// If second argument is not valid integer or zero, it's return false.
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// Otherwise, if first argument is not valid integer or zero, it's return true (Invalid string converts to zero).
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func IsDivisibleBy(str, num string) bool {
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f, _ := ToFloat(str)
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p := int64(f)
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q, _ := ToInt(num)
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if q == 0 {
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return false
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}
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return (p == 0) || (p%q == 0)
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}
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// IsNull check if the string is null.
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func IsNull(str string) bool {
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return len(str) == 0
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}
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// HasWhitespaceOnly checks the string only contains whitespace
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func HasWhitespaceOnly(str string) bool {
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return len(str) > 0 && rxHasWhitespaceOnly.MatchString(str)
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}
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// HasWhitespace checks if the string contains any whitespace
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func HasWhitespace(str string) bool {
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return len(str) > 0 && rxHasWhitespace.MatchString(str)
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}
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// IsByteLength check if the string's length (in bytes) falls in a range.
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func IsByteLength(str string, min, max int) bool {
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return len(str) >= min && len(str) <= max
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}
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// IsUUIDv3 check if the string is a UUID version 3.
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func IsUUIDv3(str string) bool {
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return rxUUID3.MatchString(str)
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}
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// IsUUIDv4 check if the string is a UUID version 4.
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func IsUUIDv4(str string) bool {
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return rxUUID4.MatchString(str)
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}
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// IsUUIDv5 check if the string is a UUID version 5.
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func IsUUIDv5(str string) bool {
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return rxUUID5.MatchString(str)
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}
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// IsUUID check if the string is a UUID (version 3, 4 or 5).
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func IsUUID(str string) bool {
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return rxUUID.MatchString(str)
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}
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// IsCreditCard check if the string is a credit card.
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func IsCreditCard(str string) bool {
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sanitized := notNumberRegexp.ReplaceAllString(str, "")
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if !rxCreditCard.MatchString(sanitized) {
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return false
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}
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var sum int64
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var digit string
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var tmpNum int64
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var shouldDouble bool
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for i := len(sanitized) - 1; i >= 0; i-- {
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digit = sanitized[i:(i + 1)]
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tmpNum, _ = ToInt(digit)
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if shouldDouble {
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tmpNum *= 2
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if tmpNum >= 10 {
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sum += ((tmpNum % 10) + 1)
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} else {
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sum += tmpNum
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}
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} else {
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sum += tmpNum
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}
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shouldDouble = !shouldDouble
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}
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return sum%10 == 0
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}
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// IsISBN10 check if the string is an ISBN version 10.
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func IsISBN10(str string) bool {
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return IsISBN(str, 10)
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}
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// IsISBN13 check if the string is an ISBN version 13.
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func IsISBN13(str string) bool {
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return IsISBN(str, 13)
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}
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// IsISBN check if the string is an ISBN (version 10 or 13).
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// If version value is not equal to 10 or 13, it will be check both variants.
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func IsISBN(str string, version int) bool {
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sanitized := whiteSpacesAndMinus.ReplaceAllString(str, "")
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var checksum int32
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var i int32
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if version == 10 {
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if !rxISBN10.MatchString(sanitized) {
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return false
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}
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for i = 0; i < 9; i++ {
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checksum += (i + 1) * int32(sanitized[i]-'0')
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}
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if sanitized[9] == 'X' {
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checksum += 10 * 10
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} else {
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checksum += 10 * int32(sanitized[9]-'0')
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}
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if checksum%11 == 0 {
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return true
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}
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return false
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} else if version == 13 {
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if !rxISBN13.MatchString(sanitized) {
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return false
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}
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factor := []int32{1, 3}
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for i = 0; i < 12; i++ {
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checksum += factor[i%2] * int32(sanitized[i]-'0')
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}
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return (int32(sanitized[12]-'0'))-((10-(checksum%10))%10) == 0
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}
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return IsISBN(str, 10) || IsISBN(str, 13)
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}
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// IsJSON check if the string is valid JSON (note: uses json.Unmarshal).
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func IsJSON(str string) bool {
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var js json.RawMessage
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return json.Unmarshal([]byte(str), &js) == nil
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}
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// IsMultibyte check if the string contains one or more multibyte chars. Empty string is valid.
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func IsMultibyte(str string) bool {
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if IsNull(str) {
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return true
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}
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return rxMultibyte.MatchString(str)
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}
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// IsASCII check if the string contains ASCII chars only. Empty string is valid.
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func IsASCII(str string) bool {
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if IsNull(str) {
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return true
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}
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return rxASCII.MatchString(str)
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}
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// IsPrintableASCII check if the string contains printable ASCII chars only. Empty string is valid.
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func IsPrintableASCII(str string) bool {
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if IsNull(str) {
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return true
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}
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return rxPrintableASCII.MatchString(str)
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}
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// IsFullWidth check if the string contains any full-width chars. Empty string is valid.
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func IsFullWidth(str string) bool {
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if IsNull(str) {
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return true
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}
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return rxFullWidth.MatchString(str)
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}
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// IsHalfWidth check if the string contains any half-width chars. Empty string is valid.
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func IsHalfWidth(str string) bool {
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if IsNull(str) {
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return true
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}
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return rxHalfWidth.MatchString(str)
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}
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|
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// IsVariableWidth check if the string contains a mixture of full and half-width chars. Empty string is valid.
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func IsVariableWidth(str string) bool {
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if IsNull(str) {
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return true
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}
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return rxHalfWidth.MatchString(str) && rxFullWidth.MatchString(str)
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}
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// IsBase64 check if a string is base64 encoded.
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func IsBase64(str string) bool {
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return rxBase64.MatchString(str)
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}
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// IsFilePath check is a string is Win or Unix file path and returns it's type.
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func IsFilePath(str string) (bool, int) {
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if rxWinPath.MatchString(str) {
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//check windows path limit see:
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// http://msdn.microsoft.com/en-us/library/aa365247(VS.85).aspx#maxpath
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if len(str[3:]) > 32767 {
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return false, Win
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}
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return true, Win
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} else if rxUnixPath.MatchString(str) {
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return true, Unix
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}
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return false, Unknown
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}
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|
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// IsDataURI checks if a string is base64 encoded data URI such as an image
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func IsDataURI(str string) bool {
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dataURI := strings.Split(str, ",")
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if !rxDataURI.MatchString(dataURI[0]) {
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return false
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}
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return IsBase64(dataURI[1])
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}
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|
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// IsISO3166Alpha2 checks if a string is valid two-letter country code
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func IsISO3166Alpha2(str string) bool {
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for _, entry := range ISO3166List {
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if str == entry.Alpha2Code {
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return true
|
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}
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}
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return false
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}
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|
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// IsISO3166Alpha3 checks if a string is valid three-letter country code
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func IsISO3166Alpha3(str string) bool {
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for _, entry := range ISO3166List {
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if str == entry.Alpha3Code {
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return true
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}
|
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}
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return false
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}
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|
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// IsISO693Alpha2 checks if a string is valid two-letter language code
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|
func IsISO693Alpha2(str string) bool {
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for _, entry := range ISO693List {
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if str == entry.Alpha2Code {
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return true
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}
|
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}
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return false
|
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}
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|
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// IsISO693Alpha3b checks if a string is valid three-letter language code
|
|
func IsISO693Alpha3b(str string) bool {
|
|
for _, entry := range ISO693List {
|
|
if str == entry.Alpha3bCode {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// IsDNSName will validate the given string as a DNS name
|
|
func IsDNSName(str string) bool {
|
|
if str == "" || len(strings.Replace(str, ".", "", -1)) > 255 {
|
|
// constraints already violated
|
|
return false
|
|
}
|
|
return !IsIP(str) && rxDNSName.MatchString(str)
|
|
}
|
|
|
|
// IsHash checks if a string is a hash of type algorithm.
|
|
// Algorithm is one of ['md4', 'md5', 'sha1', 'sha256', 'sha384', 'sha512', 'ripemd128', 'ripemd160', 'tiger128', 'tiger160', 'tiger192', 'crc32', 'crc32b']
|
|
func IsHash(str string, algorithm string) bool {
|
|
len := "0"
|
|
algo := strings.ToLower(algorithm)
|
|
|
|
if algo == "crc32" || algo == "crc32b" {
|
|
len = "8"
|
|
} else if algo == "md5" || algo == "md4" || algo == "ripemd128" || algo == "tiger128" {
|
|
len = "32"
|
|
} else if algo == "sha1" || algo == "ripemd160" || algo == "tiger160" {
|
|
len = "40"
|
|
} else if algo == "tiger192" {
|
|
len = "48"
|
|
} else if algo == "sha256" {
|
|
len = "64"
|
|
} else if algo == "sha384" {
|
|
len = "96"
|
|
} else if algo == "sha512" {
|
|
len = "128"
|
|
} else {
|
|
return false
|
|
}
|
|
|
|
return Matches(str, "^[a-f0-9]{"+len+"}$")
|
|
}
|
|
|
|
// IsDialString validates the given string for usage with the various Dial() functions
|
|
func IsDialString(str string) bool {
|
|
|
|
if h, p, err := net.SplitHostPort(str); err == nil && h != "" && p != "" && (IsDNSName(h) || IsIP(h)) && IsPort(p) {
|
|
return true
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
// IsIP checks if a string is either IP version 4 or 6.
|
|
func IsIP(str string) bool {
|
|
return net.ParseIP(str) != nil
|
|
}
|
|
|
|
// IsPort checks if a string represents a valid port
|
|
func IsPort(str string) bool {
|
|
if i, err := strconv.Atoi(str); err == nil && i > 0 && i < 65536 {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
// IsIPv4 check if the string is an IP version 4.
|
|
func IsIPv4(str string) bool {
|
|
ip := net.ParseIP(str)
|
|
return ip != nil && strings.Contains(str, ".")
|
|
}
|
|
|
|
// IsIPv6 check if the string is an IP version 6.
|
|
func IsIPv6(str string) bool {
|
|
ip := net.ParseIP(str)
|
|
return ip != nil && strings.Contains(str, ":")
|
|
}
|
|
|
|
// IsCIDR check if the string is an valid CIDR notiation (IPV4 & IPV6)
|
|
func IsCIDR(str string) bool {
|
|
_, _, err := net.ParseCIDR(str)
|
|
return err == nil
|
|
}
|
|
|
|
// IsMAC check if a string is valid MAC address.
|
|
// Possible MAC formats:
|
|
// 01:23:45:67:89:ab
|
|
// 01:23:45:67:89:ab:cd:ef
|
|
// 01-23-45-67-89-ab
|
|
// 01-23-45-67-89-ab-cd-ef
|
|
// 0123.4567.89ab
|
|
// 0123.4567.89ab.cdef
|
|
func IsMAC(str string) bool {
|
|
_, err := net.ParseMAC(str)
|
|
return err == nil
|
|
}
|
|
|
|
// IsHost checks if the string is a valid IP (both v4 and v6) or a valid DNS name
|
|
func IsHost(str string) bool {
|
|
return IsIP(str) || IsDNSName(str)
|
|
}
|
|
|
|
// IsMongoID check if the string is a valid hex-encoded representation of a MongoDB ObjectId.
|
|
func IsMongoID(str string) bool {
|
|
return rxHexadecimal.MatchString(str) && (len(str) == 24)
|
|
}
|
|
|
|
// IsLatitude check if a string is valid latitude.
|
|
func IsLatitude(str string) bool {
|
|
return rxLatitude.MatchString(str)
|
|
}
|
|
|
|
// IsLongitude check if a string is valid longitude.
|
|
func IsLongitude(str string) bool {
|
|
return rxLongitude.MatchString(str)
|
|
}
|
|
|
|
// IsRsaPublicKey check if a string is valid public key with provided length
|
|
func IsRsaPublicKey(str string, keylen int) bool {
|
|
bb := bytes.NewBufferString(str)
|
|
pemBytes, err := ioutil.ReadAll(bb)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
block, _ := pem.Decode(pemBytes)
|
|
if block != nil && block.Type != "PUBLIC KEY" {
|
|
return false
|
|
}
|
|
var der []byte
|
|
|
|
if block != nil {
|
|
der = block.Bytes
|
|
} else {
|
|
der, err = base64.StdEncoding.DecodeString(str)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
}
|
|
|
|
key, err := x509.ParsePKIXPublicKey(der)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
pubkey, ok := key.(*rsa.PublicKey)
|
|
if !ok {
|
|
return false
|
|
}
|
|
bitlen := len(pubkey.N.Bytes()) * 8
|
|
return bitlen == int(keylen)
|
|
}
|
|
|
|
func toJSONName(tag string) string {
|
|
if tag == "" {
|
|
return ""
|
|
}
|
|
|
|
// JSON name always comes first. If there's no options then split[0] is
|
|
// JSON name, if JSON name is not set, then split[0] is an empty string.
|
|
split := strings.SplitN(tag, ",", 2)
|
|
|
|
name := split[0]
|
|
|
|
// However it is possible that the field is skipped when
|
|
// (de-)serializing from/to JSON, in which case assume that there is no
|
|
// tag name to use
|
|
if name == "-" {
|
|
return ""
|
|
}
|
|
return name
|
|
}
|
|
|
|
func PrependPathToErrors(err error, path string) error {
|
|
switch err2 := err.(type) {
|
|
case Error:
|
|
err2.Path = append([]string{path}, err2.Path...)
|
|
return err2
|
|
case Errors:
|
|
errors := err2.Errors()
|
|
for i, err3 := range errors {
|
|
errors[i] = PrependPathToErrors(err3, path)
|
|
}
|
|
return err2
|
|
}
|
|
fmt.Println(err)
|
|
return err
|
|
}
|
|
|
|
// ValidateStruct use tags for fields.
|
|
// result will be equal to `false` if there are any errors.
|
|
func ValidateStruct(s interface{}) (bool, error) {
|
|
if s == nil {
|
|
return true, nil
|
|
}
|
|
result := true
|
|
var err error
|
|
val := reflect.ValueOf(s)
|
|
if val.Kind() == reflect.Interface || val.Kind() == reflect.Ptr {
|
|
val = val.Elem()
|
|
}
|
|
// we only accept structs
|
|
if val.Kind() != reflect.Struct {
|
|
return false, fmt.Errorf("function only accepts structs; got %s", val.Kind())
|
|
}
|
|
var errs Errors
|
|
for i := 0; i < val.NumField(); i++ {
|
|
valueField := val.Field(i)
|
|
typeField := val.Type().Field(i)
|
|
if typeField.PkgPath != "" {
|
|
continue // Private field
|
|
}
|
|
structResult := true
|
|
if valueField.Kind() == reflect.Interface {
|
|
valueField = valueField.Elem()
|
|
}
|
|
if (valueField.Kind() == reflect.Struct ||
|
|
(valueField.Kind() == reflect.Ptr && valueField.Elem().Kind() == reflect.Struct)) &&
|
|
typeField.Tag.Get(tagName) != "-" {
|
|
var err error
|
|
structResult, err = ValidateStruct(valueField.Interface())
|
|
if err != nil {
|
|
err = PrependPathToErrors(err, typeField.Name)
|
|
errs = append(errs, err)
|
|
}
|
|
}
|
|
resultField, err2 := typeCheck(valueField, typeField, val, nil)
|
|
if err2 != nil {
|
|
|
|
// Replace structure name with JSON name if there is a tag on the variable
|
|
jsonTag := toJSONName(typeField.Tag.Get("json"))
|
|
if jsonTag != "" {
|
|
switch jsonError := err2.(type) {
|
|
case Error:
|
|
jsonError.Name = jsonTag
|
|
err2 = jsonError
|
|
case Errors:
|
|
for i2, err3 := range jsonError {
|
|
switch customErr := err3.(type) {
|
|
case Error:
|
|
customErr.Name = jsonTag
|
|
jsonError[i2] = customErr
|
|
}
|
|
}
|
|
|
|
err2 = jsonError
|
|
}
|
|
}
|
|
|
|
errs = append(errs, err2)
|
|
}
|
|
result = result && resultField && structResult
|
|
}
|
|
if len(errs) > 0 {
|
|
err = errs
|
|
}
|
|
return result, err
|
|
}
|
|
|
|
// parseTagIntoMap parses a struct tag `valid:required~Some error message,length(2|3)` into map[string]string{"required": "Some error message", "length(2|3)": ""}
|
|
func parseTagIntoMap(tag string) tagOptionsMap {
|
|
optionsMap := make(tagOptionsMap)
|
|
options := strings.Split(tag, ",")
|
|
|
|
for i, option := range options {
|
|
option = strings.TrimSpace(option)
|
|
|
|
validationOptions := strings.Split(option, "~")
|
|
if !isValidTag(validationOptions[0]) {
|
|
continue
|
|
}
|
|
if len(validationOptions) == 2 {
|
|
optionsMap[validationOptions[0]] = tagOption{validationOptions[0], validationOptions[1], i}
|
|
} else {
|
|
optionsMap[validationOptions[0]] = tagOption{validationOptions[0], "", i}
|
|
}
|
|
}
|
|
return optionsMap
|
|
}
|
|
|
|
func isValidTag(s string) bool {
|
|
if s == "" {
|
|
return false
|
|
}
|
|
for _, c := range s {
|
|
switch {
|
|
case strings.ContainsRune("\\'\"!#$%&()*+-./:<=>?@[]^_{|}~ ", c):
|
|
// Backslash and quote chars are reserved, but
|
|
// otherwise any punctuation chars are allowed
|
|
// in a tag name.
|
|
default:
|
|
if !unicode.IsLetter(c) && !unicode.IsDigit(c) {
|
|
return false
|
|
}
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
// IsSSN will validate the given string as a U.S. Social Security Number
|
|
func IsSSN(str string) bool {
|
|
if str == "" || len(str) != 11 {
|
|
return false
|
|
}
|
|
return rxSSN.MatchString(str)
|
|
}
|
|
|
|
// IsSemver check if string is valid semantic version
|
|
func IsSemver(str string) bool {
|
|
return rxSemver.MatchString(str)
|
|
}
|
|
|
|
// IsTime check if string is valid according to given format
|
|
func IsTime(str string, format string) bool {
|
|
_, err := time.Parse(format, str)
|
|
return err == nil
|
|
}
|
|
|
|
// IsRFC3339 check if string is valid timestamp value according to RFC3339
|
|
func IsRFC3339(str string) bool {
|
|
return IsTime(str, time.RFC3339)
|
|
}
|
|
|
|
// IsRFC3339WithoutZone check if string is valid timestamp value according to RFC3339 which excludes the timezone.
|
|
func IsRFC3339WithoutZone(str string) bool {
|
|
return IsTime(str, RF3339WithoutZone)
|
|
}
|
|
|
|
// IsISO4217 check if string is valid ISO currency code
|
|
func IsISO4217(str string) bool {
|
|
for _, currency := range ISO4217List {
|
|
if str == currency {
|
|
return true
|
|
}
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
// ByteLength check string's length
|
|
func ByteLength(str string, params ...string) bool {
|
|
if len(params) == 2 {
|
|
min, _ := ToInt(params[0])
|
|
max, _ := ToInt(params[1])
|
|
return len(str) >= int(min) && len(str) <= int(max)
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
// RuneLength check string's length
|
|
// Alias for StringLength
|
|
func RuneLength(str string, params ...string) bool {
|
|
return StringLength(str, params...)
|
|
}
|
|
|
|
// IsRsaPub check whether string is valid RSA key
|
|
// Alias for IsRsaPublicKey
|
|
func IsRsaPub(str string, params ...string) bool {
|
|
if len(params) == 1 {
|
|
len, _ := ToInt(params[0])
|
|
return IsRsaPublicKey(str, int(len))
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
// StringMatches checks if a string matches a given pattern.
|
|
func StringMatches(s string, params ...string) bool {
|
|
if len(params) == 1 {
|
|
pattern := params[0]
|
|
return Matches(s, pattern)
|
|
}
|
|
return false
|
|
}
|
|
|
|
// StringLength check string's length (including multi byte strings)
|
|
func StringLength(str string, params ...string) bool {
|
|
|
|
if len(params) == 2 {
|
|
strLength := utf8.RuneCountInString(str)
|
|
min, _ := ToInt(params[0])
|
|
max, _ := ToInt(params[1])
|
|
return strLength >= int(min) && strLength <= int(max)
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
// Range check string's length
|
|
func Range(str string, params ...string) bool {
|
|
if len(params) == 2 {
|
|
value, _ := ToFloat(str)
|
|
min, _ := ToFloat(params[0])
|
|
max, _ := ToFloat(params[1])
|
|
return InRange(value, min, max)
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
func isInRaw(str string, params ...string) bool {
|
|
if len(params) == 1 {
|
|
rawParams := params[0]
|
|
|
|
parsedParams := strings.Split(rawParams, "|")
|
|
|
|
return IsIn(str, parsedParams...)
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
// IsIn check if string str is a member of the set of strings params
|
|
func IsIn(str string, params ...string) bool {
|
|
for _, param := range params {
|
|
if str == param {
|
|
return true
|
|
}
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
func checkRequired(v reflect.Value, t reflect.StructField, options tagOptionsMap) (bool, error) {
|
|
if nilPtrAllowedByRequired {
|
|
k := v.Kind()
|
|
if (k == reflect.Ptr || k == reflect.Interface) && v.IsNil() {
|
|
return true, nil
|
|
}
|
|
}
|
|
|
|
if requiredOption, isRequired := options["required"]; isRequired {
|
|
if len(requiredOption.customErrorMessage) > 0 {
|
|
return false, Error{t.Name, fmt.Errorf(requiredOption.customErrorMessage), true, "required", []string{}}
|
|
}
|
|
return false, Error{t.Name, fmt.Errorf("non zero value required"), false, "required", []string{}}
|
|
} else if _, isOptional := options["optional"]; fieldsRequiredByDefault && !isOptional {
|
|
return false, Error{t.Name, fmt.Errorf("Missing required field"), false, "required", []string{}}
|
|
}
|
|
// not required and empty is valid
|
|
return true, nil
|
|
}
|
|
|
|
func typeCheck(v reflect.Value, t reflect.StructField, o reflect.Value, options tagOptionsMap) (isValid bool, resultErr error) {
|
|
if !v.IsValid() {
|
|
return false, nil
|
|
}
|
|
|
|
tag := t.Tag.Get(tagName)
|
|
|
|
// Check if the field should be ignored
|
|
switch tag {
|
|
case "":
|
|
if v.Kind() != reflect.Slice && v.Kind() != reflect.Map {
|
|
if !fieldsRequiredByDefault {
|
|
return true, nil
|
|
}
|
|
return false, Error{t.Name, fmt.Errorf("All fields are required to at least have one validation defined"), false, "required", []string{}}
|
|
}
|
|
case "-":
|
|
return true, nil
|
|
}
|
|
|
|
isRootType := false
|
|
if options == nil {
|
|
isRootType = true
|
|
options = parseTagIntoMap(tag)
|
|
}
|
|
|
|
if isEmptyValue(v) {
|
|
// an empty value is not validated, check only required
|
|
isValid, resultErr = checkRequired(v, t, options)
|
|
for key := range options {
|
|
delete(options, key)
|
|
}
|
|
return isValid, resultErr
|
|
}
|
|
|
|
var customTypeErrors Errors
|
|
optionsOrder := options.orderedKeys()
|
|
for _, validatorName := range optionsOrder {
|
|
validatorStruct := options[validatorName]
|
|
if validatefunc, ok := CustomTypeTagMap.Get(validatorName); ok {
|
|
delete(options, validatorName)
|
|
|
|
if result := validatefunc(v.Interface(), o.Interface()); !result {
|
|
if len(validatorStruct.customErrorMessage) > 0 {
|
|
customTypeErrors = append(customTypeErrors, Error{Name: t.Name, Err: TruncatingErrorf(validatorStruct.customErrorMessage, fmt.Sprint(v), validatorName), CustomErrorMessageExists: true, Validator: stripParams(validatorName)})
|
|
continue
|
|
}
|
|
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)})
|
|
}
|
|
}
|
|
}
|
|
|
|
if len(customTypeErrors.Errors()) > 0 {
|
|
return false, customTypeErrors
|
|
}
|
|
|
|
if isRootType {
|
|
// Ensure that we've checked the value by all specified validators before report that the value is valid
|
|
defer func() {
|
|
delete(options, "optional")
|
|
delete(options, "required")
|
|
|
|
if isValid && resultErr == nil && len(options) != 0 {
|
|
optionsOrder := options.orderedKeys()
|
|
for _, validator := range optionsOrder {
|
|
isValid = false
|
|
resultErr = Error{t.Name, fmt.Errorf(
|
|
"The following validator is invalid or can't be applied to the field: %q", validator), false, stripParams(validator), []string{}}
|
|
return
|
|
}
|
|
}
|
|
}()
|
|
}
|
|
|
|
switch v.Kind() {
|
|
case reflect.Bool,
|
|
reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
|
|
reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr,
|
|
reflect.Float32, reflect.Float64,
|
|
reflect.String:
|
|
// for each tag option check the map of validator functions
|
|
for _, validatorSpec := range optionsOrder {
|
|
validatorStruct := options[validatorSpec]
|
|
var negate bool
|
|
validator := validatorSpec
|
|
customMsgExists := len(validatorStruct.customErrorMessage) > 0
|
|
|
|
// Check whether the tag looks like '!something' or 'something'
|
|
if validator[0] == '!' {
|
|
validator = validator[1:]
|
|
negate = true
|
|
}
|
|
|
|
// Check for param validators
|
|
for key, value := range ParamTagRegexMap {
|
|
ps := value.FindStringSubmatch(validator)
|
|
if len(ps) == 0 {
|
|
continue
|
|
}
|
|
|
|
validatefunc, ok := ParamTagMap[key]
|
|
if !ok {
|
|
continue
|
|
}
|
|
|
|
delete(options, validatorSpec)
|
|
|
|
switch v.Kind() {
|
|
case reflect.String,
|
|
reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
|
|
reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
|
|
reflect.Float32, reflect.Float64:
|
|
|
|
field := fmt.Sprint(v) // make value into string, then validate with regex
|
|
if result := validatefunc(field, ps[1:]...); (!result && !negate) || (result && negate) {
|
|
if customMsgExists {
|
|
return false, Error{t.Name, TruncatingErrorf(validatorStruct.customErrorMessage, field, validator), customMsgExists, stripParams(validatorSpec), []string{}}
|
|
}
|
|
if negate {
|
|
return false, Error{t.Name, fmt.Errorf("%s does validate as %s", field, validator), customMsgExists, stripParams(validatorSpec), []string{}}
|
|
}
|
|
return false, Error{t.Name, fmt.Errorf("%s does not validate as %s", field, validator), customMsgExists, stripParams(validatorSpec), []string{}}
|
|
}
|
|
default:
|
|
// type not yet supported, fail
|
|
return false, Error{t.Name, fmt.Errorf("Validator %s doesn't support kind %s", validator, v.Kind()), false, stripParams(validatorSpec), []string{}}
|
|
}
|
|
}
|
|
|
|
if validatefunc, ok := TagMap[validator]; ok {
|
|
delete(options, validatorSpec)
|
|
|
|
switch v.Kind() {
|
|
case reflect.String,
|
|
reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
|
|
reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
|
|
reflect.Float32, reflect.Float64:
|
|
field := fmt.Sprint(v) // make value into string, then validate with regex
|
|
if result := validatefunc(field); !result && !negate || result && negate {
|
|
if customMsgExists {
|
|
return false, Error{t.Name, TruncatingErrorf(validatorStruct.customErrorMessage, field, validator), customMsgExists, stripParams(validatorSpec), []string{}}
|
|
}
|
|
if negate {
|
|
return false, Error{t.Name, fmt.Errorf("%s does validate as %s", field, validator), customMsgExists, stripParams(validatorSpec), []string{}}
|
|
}
|
|
return false, Error{t.Name, fmt.Errorf("%s does not validate as %s", field, validator), customMsgExists, stripParams(validatorSpec), []string{}}
|
|
}
|
|
default:
|
|
//Not Yet Supported Types (Fail here!)
|
|
err := fmt.Errorf("Validator %s doesn't support kind %s for value %v", validator, v.Kind(), v)
|
|
return false, Error{t.Name, err, false, stripParams(validatorSpec), []string{}}
|
|
}
|
|
}
|
|
}
|
|
return true, nil
|
|
case reflect.Map:
|
|
if v.Type().Key().Kind() != reflect.String {
|
|
return false, &UnsupportedTypeError{v.Type()}
|
|
}
|
|
var sv stringValues
|
|
sv = v.MapKeys()
|
|
sort.Sort(sv)
|
|
result := true
|
|
for i, k := range sv {
|
|
var resultItem bool
|
|
var err error
|
|
if v.MapIndex(k).Kind() != reflect.Struct {
|
|
resultItem, err = typeCheck(v.MapIndex(k), t, o, options)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
} else {
|
|
resultItem, err = ValidateStruct(v.MapIndex(k).Interface())
|
|
if err != nil {
|
|
err = PrependPathToErrors(err, t.Name+"."+sv[i].Interface().(string))
|
|
return false, err
|
|
}
|
|
}
|
|
result = result && resultItem
|
|
}
|
|
return result, nil
|
|
case reflect.Slice, reflect.Array:
|
|
result := true
|
|
for i := 0; i < v.Len(); i++ {
|
|
var resultItem bool
|
|
var err error
|
|
if v.Index(i).Kind() != reflect.Struct {
|
|
resultItem, err = typeCheck(v.Index(i), t, o, options)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
} else {
|
|
resultItem, err = ValidateStruct(v.Index(i).Interface())
|
|
if err != nil {
|
|
err = PrependPathToErrors(err, t.Name+"."+strconv.Itoa(i))
|
|
return false, err
|
|
}
|
|
}
|
|
result = result && resultItem
|
|
}
|
|
return result, nil
|
|
case reflect.Interface:
|
|
// If the value is an interface then encode its element
|
|
if v.IsNil() {
|
|
return true, nil
|
|
}
|
|
return ValidateStruct(v.Interface())
|
|
case reflect.Ptr:
|
|
// If the value is a pointer then check its element
|
|
if v.IsNil() {
|
|
return true, nil
|
|
}
|
|
return typeCheck(v.Elem(), t, o, options)
|
|
case reflect.Struct:
|
|
return ValidateStruct(v.Interface())
|
|
default:
|
|
return false, &UnsupportedTypeError{v.Type()}
|
|
}
|
|
}
|
|
|
|
func stripParams(validatorString string) string {
|
|
return paramsRegexp.ReplaceAllString(validatorString, "")
|
|
}
|
|
|
|
func isEmptyValue(v reflect.Value) bool {
|
|
switch v.Kind() {
|
|
case reflect.String, reflect.Array:
|
|
return v.Len() == 0
|
|
case reflect.Map, reflect.Slice:
|
|
return v.Len() == 0 || v.IsNil()
|
|
case reflect.Bool:
|
|
return !v.Bool()
|
|
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
|
return v.Int() == 0
|
|
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
|
|
return v.Uint() == 0
|
|
case reflect.Float32, reflect.Float64:
|
|
return v.Float() == 0
|
|
case reflect.Interface, reflect.Ptr:
|
|
return v.IsNil()
|
|
}
|
|
|
|
return reflect.DeepEqual(v.Interface(), reflect.Zero(v.Type()).Interface())
|
|
}
|
|
|
|
// ErrorByField returns error for specified field of the struct
|
|
// validated by ValidateStruct or empty string if there are no errors
|
|
// or this field doesn't exists or doesn't have any errors.
|
|
func ErrorByField(e error, field string) string {
|
|
if e == nil {
|
|
return ""
|
|
}
|
|
return ErrorsByField(e)[field]
|
|
}
|
|
|
|
// ErrorsByField returns map of errors of the struct validated
|
|
// by ValidateStruct or empty map if there are no errors.
|
|
func ErrorsByField(e error) map[string]string {
|
|
m := make(map[string]string)
|
|
if e == nil {
|
|
return m
|
|
}
|
|
// prototype for ValidateStruct
|
|
|
|
switch e.(type) {
|
|
case Error:
|
|
m[e.(Error).Name] = e.(Error).Err.Error()
|
|
case Errors:
|
|
for _, item := range e.(Errors).Errors() {
|
|
n := ErrorsByField(item)
|
|
for k, v := range n {
|
|
m[k] = v
|
|
}
|
|
}
|
|
}
|
|
|
|
return m
|
|
}
|
|
|
|
// Error returns string equivalent for reflect.Type
|
|
func (e *UnsupportedTypeError) Error() string {
|
|
return "validator: unsupported type: " + e.Type.String()
|
|
}
|
|
|
|
func (sv stringValues) Len() int { return len(sv) }
|
|
func (sv stringValues) Swap(i, j int) { sv[i], sv[j] = sv[j], sv[i] }
|
|
func (sv stringValues) Less(i, j int) bool { return sv.get(i) < sv.get(j) }
|
|
func (sv stringValues) get(i int) string { return sv[i].String() }
|