Package AWS : Validator tag for s3 bucket (#184)

Package AWS:
- fix validator tag for s3 bucket: use custom function instead of hostname

aws/configCustom/models.go

@@ -30,8 +30,11 @@ import (
 	"fmt"
 	"net"
 	"net/url"
+	"regexp"
 	"strings"
 
+	"github.com/go-playground/validator/v10"
+
 	sdkaws "github.com/aws/aws-sdk-go-v2/aws"
 	libval "github.com/go-playground/validator/v10"
 	libhtc "github.com/nabbar/golib/httpcli"
@@ -43,7 +46,7 @@ type Model struct {
 	Endpoint  string `mapstructure:"endpoint" json:"endpoint" yaml:"endpoint" toml:"endpoint" validate:"url"`
 	AccessKey string `mapstructure:"accesskey" json:"accesskey" yaml:"accesskey" toml:"accesskey" validate:"omitempty,printascii"`
 	SecretKey string `mapstructure:"secretkey" json:"secretkey" yaml:"secretkey" toml:"secretkey" validate:"omitempty,printascii"`
-	Bucket    string `mapstructure:"bucket" json:"bucket" yaml:"bucket" toml:"bucket" validate:"omitempty,hostname"`
+	Bucket    string `mapstructure:"bucket" json:"bucket" yaml:"bucket" toml:"bucket" validate:"omitempty,bucket-s3"`
 }
 
 type ModelStatus struct {
@@ -59,10 +62,25 @@ type awsModel struct {
 	mapRegion map[string]*url.URL
 }
 
+func validateBucketS3(fl validator.FieldLevel) bool {
+	value := fl.Field().String()
+	re := regexp.MustCompile(`^[A-Za-z0-9]([A-Za-z0-9]|\.[A-Za-z0-9]|-[A-Za-z0-9]){0,46}[A-Za-z0-9]$`)
+	if !re.MatchString(value) {
+		return false
+	}
+	return true
+}
+
 func (c *awsModel) Validate() error {
 	err := ErrorConfigValidator.Error(nil)
 
-	if er := libval.New().Struct(c); er != nil {
+	validate := libval.New()
+	valErr := validate.RegisterValidation("bucket-s3", validateBucketS3)
+	if valErr != nil {
+		err.Add(valErr)
+	}
+
+	if er := validate.Struct(c); er != nil {
 		if e, ok := er.(*libval.InvalidValidationError); ok {
 			err.Add(e)
 		}