97 lines
2.3 KiB
Go
97 lines
2.3 KiB
Go
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/*
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Copyright 2016 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 stickysession
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import (
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"regexp"
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"k8s.io/kubernetes/pkg/apis/extensions"
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"k8s.io/ingress/core/pkg/ingress/annotations/parser"
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ing_errors "k8s.io/ingress/core/pkg/ingress/errors"
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)
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const (
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stickyEnabled = "ingress.kubernetes.io/sticky-enabled"
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stickyName = "ingress.kubernetes.io/sticky-name"
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stickyHash = "ingress.kubernetes.io/sticky-hash"
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defaultStickyHash = "md5"
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defaultStickyName = "route"
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)
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var (
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stickyHashRegex = regexp.MustCompile(`index|md5|sha1`)
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)
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// StickyConfig describes the per ingress sticky session config
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type StickyConfig struct {
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// The name of the cookie that will be used as stickness router.
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Name string `json:"name"`
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// If sticky must or must not be enabled
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Enabled bool `json:"enabled"`
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// The hash that will be used to encode the cookie
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Hash string `json:"hash"`
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}
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type sticky struct {
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}
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// NewParser creates a new Sticky annotation parser
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func NewParser() parser.IngressAnnotation {
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return sticky{}
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}
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// ParseAnnotations parses the annotations contained in the ingress
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// rule used to configure the sticky directives
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func (a sticky) Parse(ing *extensions.Ingress) (interface{}, error) {
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// Check if the sticky is enabled
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se, err := parser.GetBoolAnnotation(stickyEnabled, ing)
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if err != nil {
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return nil, err
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}
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// Get the Sticky Cookie Name
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sn, err := parser.GetStringAnnotation(stickyName, ing)
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if err != nil {
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return nil, err
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}
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if sn == "" {
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sn = defaultStickyName
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}
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sh, err := parser.GetStringAnnotation(stickyHash, ing)
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if err != nil {
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return nil, err
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}
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if sh == "" {
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sh = defaultStickyHash
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}
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if !stickyHashRegex.MatchString(sh) {
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return nil, ing_errors.NewInvalidAnnotationContent(stickyHash, sh)
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}
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return &StickyConfig{
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Name: sn,
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Enabled: se,
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Hash: sh,
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}, nil
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}
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