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/*
Copyright 2016 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// Fed contains federation specific DNS code.
package fed
import (
"errors"
"fmt"
"strings"
"k8s.io/kubernetes/pkg/util/validation"
)
var ErrExpectedKeyEqualsValue = errors.New("invalid format, must be key=value")
// ParseFederationsFlag parses the federations command line flag. The
// flag is a comma-separated list of zero or more "name=label" pairs,
// e.g. "a=b,c=d".
func ParseFederationsFlag(str string, federations map[string]string) error {
if strings.TrimSpace(str) == "" {
return nil
}
for _, val := range strings.Split(str, ",") {
splits := strings.SplitN(strings.TrimSpace(val), "=", 2)
if len(splits) != 2 {
return ErrExpectedKeyEqualsValue
}
name := strings.TrimSpace(splits[0])
domain := strings.TrimSpace(splits[1])
if err := ValidateName(name); err != nil {
return err
}
if err := ValidateDomain(domain); err != nil {
return err
}
federations[name] = domain
}
return nil
}
// ValidateName checks the validity of a federation name.
func ValidateName(name string) error {
if errs := validation.IsDNS1123Label(name); len(errs) != 0 {
return fmt.Errorf("%q not a valid federation name: %q", name, errs)
}
return nil
}
// ValidateDomain checks the validity of a federation label.
func ValidateDomain(name string) error {
// The federation domain name need not strictly be domain names, we
// accept valid dns names with subdomain components.
if errs := validation.IsDNS1123Subdomain(name); len(errs) != 0 {
return fmt.Errorf("%q not a valid domain name: %q", name, errs)
}
return nil
}
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