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builtins.go
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builtins.go
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package golidator
import (
"bytes"
"net/mail"
"reflect"
"regexp"
"strconv"
"strings"
"unicode/utf8"
)
// ReqValidator check value that must not be empty.
func ReqValidator(param string, v reflect.Value) (ValidationResult, error) {
switch v.Kind() {
case reflect.String:
if v.String() == "" {
return ValidationNG, nil
}
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
if v.Int() == 0 {
return ValidationNG, nil
}
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
if v.Uint() == 0 {
return ValidationNG, nil
}
case reflect.Float32, reflect.Float64:
if v.Float() == 0 {
return ValidationNG, nil
}
case reflect.Bool:
// :)
case reflect.Array, reflect.Slice:
if v.Len() == 0 {
return ValidationNG, nil
}
case reflect.Struct:
// :)
case reflect.Ptr, reflect.Interface:
if v.IsNil() {
return ValidationNG, nil
}
default:
return 0, ErrValidateUnsupportedType
}
return ValidationOK, nil
}
// DefaultValidator set value when value is empty.
func DefaultValidator(param string, v reflect.Value) (ValidationResult, error) {
switch v.Kind() {
case reflect.String:
if !v.CanAddr() {
return ValidationNG, nil
}
if v.String() == "" {
v.SetString(param)
}
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
if !v.CanAddr() {
return ValidationNG, nil
}
pInt, err := strconv.ParseInt(param, 0, 64)
if err != nil {
return ValidationNG, nil
}
if v.Int() == 0 {
v.SetInt(pInt)
}
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
if !v.CanAddr() {
return ValidationNG, nil
}
pUint, err := strconv.ParseUint(param, 0, 64)
if err != nil {
return ValidationNG, nil
}
if v.Uint() == 0 {
v.SetUint(pUint)
}
case reflect.Float32, reflect.Float64:
if !v.CanAddr() {
return ValidationNG, nil
}
pFloat, err := strconv.ParseFloat(param, 64)
if err != nil {
return ValidationNG, nil
}
if v.Float() == 0 {
v.SetFloat(pFloat)
}
default:
return 0, ErrValidateUnsupportedType
}
return ValidationOK, nil
}
// MinValidator check value that must greater or equal than config value.
func MinValidator(param string, v reflect.Value) (ValidationResult, error) {
switch v.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
pInt, err := strconv.ParseInt(param, 0, 64)
if err != nil {
return 0, ErrInvalidConfigValue
}
if v.Int() < pInt {
return ValidationNG, nil
}
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
pUint, err := strconv.ParseUint(param, 0, 64)
if err != nil {
return 0, ErrInvalidConfigValue
}
if v.Uint() < pUint {
return ValidationNG, nil
}
case reflect.Float32, reflect.Float64:
pFloat, err := strconv.ParseFloat(param, 64)
if err != nil {
return 0, ErrInvalidConfigValue
}
if v.Float() < pFloat {
return ValidationNG, nil
}
default:
return 0, ErrValidateUnsupportedType
}
return ValidationOK, nil
}
// MaxValidator check value that must less or equal than config value.
func MaxValidator(param string, v reflect.Value) (ValidationResult, error) {
switch v.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
pInt, err := strconv.ParseInt(param, 0, 64)
if err != nil {
return 0, ErrInvalidConfigValue
}
if v.Int() > pInt {
return ValidationNG, nil
}
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
pUint, err := strconv.ParseUint(param, 0, 64)
if err != nil {
return 0, ErrInvalidConfigValue
}
if v.Uint() > pUint {
return ValidationNG, nil
}
case reflect.Float32, reflect.Float64:
pFloat, err := strconv.ParseFloat(param, 64)
if err != nil {
return 0, ErrInvalidConfigValue
}
if v.Float() > pFloat {
return ValidationNG, nil
}
default:
return 0, ErrValidateUnsupportedType
}
return ValidationOK, nil
}
// MinLenValidator check value length that must greater or equal than config value.
func MinLenValidator(param string, v reflect.Value) (ValidationResult, error) {
switch v.Kind() {
case reflect.String:
if v.String() == "" {
return ValidationOK, nil // emptyの場合は無視 これはreqの役目だ
}
p, err := strconv.ParseInt(param, 0, 64)
if err != nil {
return 0, ErrInvalidConfigValue
}
if int64(utf8.RuneCountInString(v.String())) < p {
return ValidationNG, nil
}
case reflect.Array, reflect.Map, reflect.Slice:
if v.Len() == 0 {
return ValidationOK, nil
}
p, err := strconv.ParseInt(param, 0, 64)
if err != nil {
return 0, ErrInvalidConfigValue
}
if int64(v.Len()) < p {
return ValidationNG, nil
}
default:
return 0, ErrValidateUnsupportedType
}
return ValidationOK, nil
}
// MaxLenValidator check value length that must less or equal than config value.
func MaxLenValidator(param string, v reflect.Value) (ValidationResult, error) {
switch v.Kind() {
case reflect.String:
if v.String() == "" {
return ValidationOK, nil // emptyの場合は無視 これはreqの役目だ
}
p, err := strconv.ParseInt(param, 0, 64)
if err != nil {
return 0, ErrInvalidConfigValue
}
if int64(utf8.RuneCountInString(v.String())) > p {
return ValidationNG, nil
}
case reflect.Array, reflect.Map, reflect.Slice:
if v.Len() == 0 {
return ValidationOK, nil
}
p, err := strconv.ParseInt(param, 0, 64)
if err != nil {
return 0, ErrInvalidConfigValue
}
if int64(v.Len()) > p {
return ValidationNG, nil
}
default:
return 0, ErrValidateUnsupportedType
}
return ValidationOK, nil
}
// atext in RFC5322
// http://www.hde.co.jp/rfc/rfc5322.php?page=12
var atextChars = []byte(
"ABCDEFGHIJKLMNOPQRSTUVWXYZ" +
"abcdefghijklmnopqrstuvwxyz" +
"0123456789" +
"!#$%&'*+-/=?^_`{|}~")
// isAtext is return atext contains `c`
func isAtext(c rune) bool {
return bytes.IndexRune(atextChars, c) >= 0
}
// EmailValidator check value that must be email address format.
func EmailValidator(param string, v reflect.Value) (ValidationResult, error) {
switch v.Kind() {
case reflect.String:
if v.String() == "" {
return ValidationOK, nil
}
addr := v.String()
// do validation by RFC5322
// http://www.hde.co.jp/rfc/rfc5322.php?page=17
// screening
if _, err := mail.ParseAddress(addr); err != nil {
return ValidationNG, nil
}
addrSpec := strings.Split(addr, "@")
if len(addrSpec) != 2 {
return ValidationNG, nil
}
// check local part
localPart := addrSpec[0]
// divided by quoted-string style or dom-atom style
if match, err := regexp.MatchString(`"[^\t\n\f\r\\]*"`, localPart); err == nil && match { // "\"以外の表示可能文字を認める
// OK
} else if match, err := regexp.MatchString(`^([^.\s]+\.)*([^.\s]+)$`, localPart); err != nil || !match { // (hoge.)*hoge
return ValidationNG, nil
} else {
// atext check for local part
for _, c := range localPart {
if string(c) == "." {
// "." is already checked by regexp
continue
}
if !isAtext(c) {
return ValidationNG, nil
}
}
}
// check domain part
domain := addrSpec[1]
if match, err := regexp.MatchString(`^([^.\s]+\.)*[^.\s]+$`, domain); err != nil || !match { // (hoge.)*hoge
return ValidationNG, nil
}
// atext check for domain part
for _, c := range domain {
if string(c) == "." {
// "." is already checked by regexp
continue
}
if !isAtext(c) {
return ValidationNG, nil
}
}
default:
return 0, ErrValidateUnsupportedType
}
return ValidationOK, nil
}
// EnumValidator check value that must contains in config values.
func EnumValidator(param string, v reflect.Value) (ValidationResult, error) {
if param == "" {
return 0, ErrInvalidConfigValue
}
params := strings.Split(param, "|")
var check func(v reflect.Value) (ValidationResult, error)
check = func(v reflect.Value) (ValidationResult, error) {
if v.Kind() == reflect.Ptr {
v = v.Elem()
}
switch v.Kind() {
case reflect.String:
val := v.String()
if val == "" {
// need empty checking? use req :)
return ValidationOK, nil
}
for _, value := range params {
if val == value {
return ValidationOK, nil
}
}
return ValidationNG, nil
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
val := v.Int()
for _, value := range params {
value2, err := strconv.ParseInt(value, 10, 0)
if err != nil {
return 0, ErrInvalidConfigValue
}
if val == value2 {
return ValidationOK, nil
}
}
return ValidationNG, nil
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
val := v.Uint()
for _, value := range params {
value2, err := strconv.ParseUint(value, 10, 0)
if err != nil {
return 0, ErrInvalidConfigValue
}
if val == value2 {
return ValidationOK, nil
}
}
return ValidationNG, nil
case reflect.Array, reflect.Slice:
for i := 0; i < v.Len(); i++ {
e := v.Index(i)
result, err := check(e)
if err != nil {
return 0, err
}
if result != ValidationOK {
return ValidationNG, nil
}
}
return ValidationOK, nil
default:
return 0, ErrValidateUnsupportedType
}
}
return check(v)
}
// RegExpValidator check value that must valid about config regexp pattern.
func RegExpValidator(param string, v reflect.Value) (ValidationResult, error) {
if param == "" {
return ValidationNG, ErrInvalidConfigValue
}
re, err := regexp.Compile(param)
if err != nil {
return ValidationNG, ErrInvalidConfigValue
}
switch v.Kind() {
case reflect.String:
if v.String() == "" {
return ValidationOK, nil // empty is valid. if you want to check it, use req validator.
} else if !re.MatchString(v.String()) {
return ValidationNG, nil
}
default:
return ValidationNG, ErrValidateUnsupportedType
}
return ValidationOK, nil
}