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89 lines
3.2 KiB
Go
89 lines
3.2 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package validation
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import (
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"strings"
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"k8s.io/apimachinery/pkg/util/validation"
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"k8s.io/apimachinery/pkg/util/validation/field"
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)
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// IsNegativeErrorMsg is a error message for value must be greater than or equal to 0.
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const IsNegativeErrorMsg string = `must be greater than or equal to 0`
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// ValidateNameFunc validates that the provided name is valid for a given resource type.
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// Not all resources have the same validation rules for names. Prefix is true
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// if the name will have a value appended to it. If the name is not valid,
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// this returns a list of descriptions of individual characteristics of the
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// value that were not valid. Otherwise this returns an empty list or nil.
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type ValidateNameFunc func(name string, prefix bool) []string
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// NameIsDNSSubdomain is a ValidateNameFunc for names that must be a DNS subdomain.
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func NameIsDNSSubdomain(name string, prefix bool) []string {
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if prefix {
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name = maskTrailingDash(name)
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}
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return validation.IsDNS1123Subdomain(name)
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}
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// NameIsDNSLabel is a ValidateNameFunc for names that must be a DNS 1123 label.
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func NameIsDNSLabel(name string, prefix bool) []string {
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if prefix {
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name = maskTrailingDash(name)
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}
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return validation.IsDNS1123Label(name)
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}
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// NameIsDNS1035Label is a ValidateNameFunc for names that must be a DNS 952 label.
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func NameIsDNS1035Label(name string, prefix bool) []string {
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if prefix {
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name = maskTrailingDash(name)
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}
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return validation.IsDNS1035Label(name)
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}
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// ValidateNamespaceName can be used to check whether the given namespace name is valid.
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// Prefix indicates this name will be used as part of generation, in which case
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// trailing dashes are allowed.
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var ValidateNamespaceName = NameIsDNSLabel
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// ValidateServiceAccountName can be used to check whether the given service account name is valid.
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// Prefix indicates this name will be used as part of generation, in which case
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// trailing dashes are allowed.
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var ValidateServiceAccountName = NameIsDNSSubdomain
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// maskTrailingDash replaces the final character of a string with a subdomain safe
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// value if it is a dash and if the length of this string is greater than 1. Note that
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// this is used when a value could be appended to the string, see ValidateNameFunc
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// for more info.
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func maskTrailingDash(name string) string {
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if len(name) > 1 && strings.HasSuffix(name, "-") {
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return name[:len(name)-2] + "a"
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}
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return name
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}
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// ValidateNonnegativeField validates that given value is not negative.
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func ValidateNonnegativeField(value int64, fldPath *field.Path) field.ErrorList {
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allErrs := field.ErrorList{}
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if value < 0 {
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allErrs = append(allErrs, field.Invalid(fldPath, value, IsNegativeErrorMsg))
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}
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return allErrs
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}
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