github.com/gravitational/teleport/api@v0.0.0-20240507183017-3110591cbafc/types/common/common.go (about)

     1  /*
     2  Copyright 2023 Gravitational, Inc.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package common
    18  
    19  import "regexp"
    20  
    21  // LabelPattern is a regexp that describes a valid label key. In this case,
    22  // valid label keys can consist of alphanumeric characters, forward slashes,
    23  // periods, underscores, colons, stars, and dashes. Some valid label examples:
    24  //
    25  // label
    26  // teleport.dev/fine-grained-access
    27  // teleport.dev/managed:internal_access
    28  // all-objects*
    29  const LabelPattern = `^[a-zA-Z/.0-9_:*-]+$`
    30  
    31  var validLabelKey = regexp.MustCompile(LabelPattern)
    32  
    33  // IsValidLabelKey checks if the supplied string matches the
    34  // label key regexp.
    35  func IsValidLabelKey(s string) bool {
    36  	return validLabelKey.MatchString(s)
    37  }