{* ../../docs_src/query_params_str_validations/tutorial003.py hl[9] *}

## Ajouter des validations par expressions régulières

On peut définir une <abbr title="Une expression régulière, regex ou regexp est une suite de caractères qui définit un pattern de correspondance pour les chaînes de caractères.">expression régulière</abbr> à laquelle le paramètre doit correspondre :

	siteLK.RLock()
	defer siteLK.RUnlock()

	return s.region
}

var validRegionRegex = regexp.MustCompile("^[a-zA-Z][a-zA-Z0-9-_-]+$")

// validSiteNameRegex - allows lowercase letters, digits and '-', starts with
// letter. At least 2 characters long.
var validSiteNameRegex = regexp.MustCompile("^[a-z][a-z0-9-]+$")

// LookupSite - get site related configuration. Loads configuration from legacy

// Identifier represents a parsed identifier
type Identifier struct {
	Unquoted *string           `parser:"  @Ident"`
	Quoted   *QuotedIdentifier `parser:"| @QuotIdent"`
}

var (
	sqlLexer = lexer.Must(lexer.Regexp(`(\s+)` +
		`|(?P<Timeword>(?i)\b(?:YEAR|MONTH|DAY|HOUR|MINUTE|SECOND|TIMEZONE_HOUR|TIMEZONE_MINUTE)\b)` +

package main

import (
	"bytes"
	"crypto/md5"
	"encoding/base64"
	"encoding/binary"
	"encoding/hex"
	"encoding/json"
	"errors"
	"fmt"
	"io"
	"log"
	"os"
	"path/filepath"
	"regexp"
	"sort"
	"strconv"
	"strings"
	"time"
	"unicode/utf8"

	"github.com/google/uuid"
	"github.com/klauspost/compress/zip"
	"github.com/klauspost/filepathx"
	"github.com/klauspost/reedsolomon"

0000190 00 00 00 00 00 00 00 00 00 00 00 72 2f 72 2e 7a
00001a0 69 70 50 4b 05 06 00 00 00 00 01 00 01 00 35 00
00001b0 00 00 6d 01 00 00 00 00`
	s = regexp.MustCompile(`[0-9a-f]{7}`).ReplaceAllString(s, "")
	s = regexp.MustCompile(`\s+`).ReplaceAllString(s, "")
	b, err := hex.DecodeString(s)
	if err != nil {
		panic(err)
	}
	return b
}

i.push(n),_.push(t),_.push(s),_.push(n);r.sort(e),d.sort(e),i.sort(e),_.sort(e),this._weekdaysRegex=new RegExp("^("+_.join("|")+")","i"),this._weekdaysShortRegex=this._weekdaysRegex,this._weekdaysMinRegex=this._weekdaysRegex,this._weekdaysStrictRegex=new RegExp("^("+i.join("|")+")","i"),this._weekdaysShortStrictRegex=new RegExp("^("+d.join("|")+")","i"),this._weekdaysMinStrictRegex=new RegExp("^("+r.join("|")+")","i")}function Qe(){return this.hours()%12||12}function Xe(e,a){W(e,0,0,function(){return...

     * <pre>
     * message: {item} must match "{regexp}".
     * </pre>
     * @param property The property name for the message. (NotNull)
     * @param regexp The parameter regexp for message. (NotNull)
     * @return this. (NotNull)
     */
    public FessMessages addConstraintsPatternMessage(String property, String regexp) {
        assertPropertyNotNull(property);

constraints.Null.message        = {item} doit être null.
constraints.Past.message        = {item} doit être dans le passé.
constraints.Pattern.message     = {item} doit valider l'expression "{regexp}".
constraints.Size.message        = La taille de {item} doit être entre {min} et {max}.

# ----------------------------------------------------------
#                                        Hibernate Validator

// limitations under the License.

package proxyconfig

import (
	"bytes"
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"io"
	"os"
	"regexp"
	"strings"

	"github.com/hashicorp/go-multierror"
	"github.com/spf13/cobra"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"sigs.k8s.io/yaml"

	"istio.io/istio/istioctl/pkg/cli"

(n))return-1===St.indexOf(n)||Boolean(Nt.test(t.nodeValue)||Dt.test(t.nodeValue));for(var i=e.filter((function(t){return t instanceof RegExp})),o=0,a=i.length;o<a;o++)if(i[o].test(n))return!0;return!1})(t,r)||i.removeAttribute(t.nodeName)}))},l=0,r=a.length;l<r;l++)s(l);return i.body.innerHTML}var It="tooltip",kt="bs.tooltip",Ot=o.default.fn.tooltip,jt=new RegExp("(^|\\s)bs-tooltip\\S+","g"),Pt=["sanitize","whiteList","sanitizeFn"],Lt="fade",Rt="show",xt="show",qt="out",Ft="hover",Qt="focus",Bt=...