mirror of
https://gitee.com/rainbond/Rainbond.git
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116 lines
3.0 KiB
Go
116 lines
3.0 KiB
Go
/*
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Copyright 2015 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 parser
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import (
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"fmt"
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"k8s.io/ingress-nginx/ingress/errors"
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"strconv"
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extensions "k8s.io/api/extensions/v1beta1"
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)
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var (
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// AnnotationsPrefix defines the common prefix used in the nginx ingress controller
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AnnotationsPrefix = "nginx.ingress.kubernetes.io"
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)
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// IngressAnnotation has a method to parse annotations located in Ingress
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type IngressAnnotation interface {
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Parse(ing *extensions.Ingress) (interface{}, error)
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}
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type ingAnnotations map[string]string
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func (a ingAnnotations) parseBool(name string) (bool, error) {
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val, ok := a[name]
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if ok {
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b, err := strconv.ParseBool(val)
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if err != nil {
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return false, errors.NewInvalidAnnotationContent(name, val)
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}
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return b, nil
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}
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return false, errors.ErrMissingAnnotations
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}
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func (a ingAnnotations) parseString(name string) (string, error) {
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val, ok := a[name]
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if ok {
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return val, nil
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}
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return "", errors.ErrMissingAnnotations
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}
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func (a ingAnnotations) parseInt(name string) (int, error) {
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val, ok := a[name]
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if ok {
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i, err := strconv.Atoi(val)
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if err != nil {
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return 0, errors.NewInvalidAnnotationContent(name, val)
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}
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return i, nil
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}
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return 0, errors.ErrMissingAnnotations
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}
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func checkAnnotation(name string, ing *extensions.Ingress) error {
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if ing == nil || len(ing.GetAnnotations()) == 0 {
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return errors.ErrMissingAnnotations
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}
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if name == "" {
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return errors.ErrInvalidAnnotationName
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}
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return nil
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}
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// GetBoolAnnotation extracts a boolean from an Ingress annotation
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func GetBoolAnnotation(name string, ing *extensions.Ingress) (bool, error) {
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v := GetAnnotationWithPrefix(name)
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err := checkAnnotation(v, ing)
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if err != nil {
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return false, err
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}
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return ingAnnotations(ing.GetAnnotations()).parseBool(v)
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}
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// GetStringAnnotation extracts a string from an Ingress annotation
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func GetStringAnnotation(name string, ing *extensions.Ingress) (string, error) {
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v := GetAnnotationWithPrefix(name)
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err := checkAnnotation(v, ing)
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if err != nil {
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return "", err
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}
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return ingAnnotations(ing.GetAnnotations()).parseString(v)
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}
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// GetIntAnnotation extracts an int from an Ingress annotation
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func GetIntAnnotation(name string, ing *extensions.Ingress) (int, error) {
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v := GetAnnotationWithPrefix(name)
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err := checkAnnotation(v, ing)
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if err != nil {
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return 0, err
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}
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return ingAnnotations(ing.GetAnnotations()).parseInt(v)
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}
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// GetAnnotationWithPrefix returns the prefix of ingress annotations
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func GetAnnotationWithPrefix(suffix string) string {
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return fmt.Sprintf("%v/%v", AnnotationsPrefix, suffix)
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}
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