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ingressv1.go
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ingressv1.go
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package definitions
import (
"encoding/json"
"errors"
"strconv"
)
const (
IngressFilterAnnotation = "zalando.org/skipper-filter"
IngressPredicateAnnotation = "zalando.org/skipper-predicate"
IngressRoutesAnnotation = "zalando.org/skipper-routes"
)
var errInvalidPortType = errors.New("invalid port type")
type IngressV1List struct {
Items []*IngressV1Item `json:"items"`
}
type IngressV1Item struct {
Metadata *Metadata `json:"metadata"`
Spec *IngressV1Spec `json:"spec"`
}
// IngressSpecV1 https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.22/#ingressspec-v1-networking-k8s-io
type IngressV1Spec struct {
DefaultBackend *BackendV1 `json:"defaultBackend,omitempty"`
IngressClassName string `json:"ingressClassName,omitempty"`
Rules []*RuleV1 `json:"rules"`
IngressTLS []*TLSV1 `json:"tls,omitempty"`
}
// BackendV1 https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.22/#ingressbackend-v1-networking-k8s-io
type BackendV1 struct {
Service Service `json:"service,omitempty"` // can be nil, because of TypedLocalObjectReference
// Resource TypedLocalObjectReference is not supported https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.22/#typedlocalobjectreference-v1-core
}
// Service https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.22/#ingressservicebackend-v1-networking-k8s-io
type Service struct {
Name string `json:"name"`
Port BackendPortV1 `json:"port"`
}
type BackendPortV1 struct {
Name string `json:"name"`
Number int `json:"number"`
}
func (p BackendPortV1) String() string {
if p.Number != 0 {
return strconv.Itoa(p.Number)
}
return p.Name
}
type RuleV1 struct {
Host string `json:"host"`
Http *HTTPRuleV1 `json:"http"`
}
type HTTPRuleV1 struct {
Paths []*PathRuleV1 `json:"paths"`
}
// PathRuleV1 https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.22/#httpingresspath-v1-networking-k8s-io
type PathRuleV1 struct {
Path string `json:"path"`
PathType string `json:"pathType"`
Backend *BackendV1 `json:"backend"`
}
type TLSV1 struct {
Hosts []string `json:"hosts"`
SecretName string `json:"secretName"`
}
// ResourceID is a stripped down version of Metadata used to identify resources in a cache map
type ResourceID struct {
Namespace string
Name string
}
// BackendPort is used for TargetPort similar to Kubernetes intOrString type
type BackendPort struct {
Value interface{}
}
// ParseIngressV1JSON parse JSON into an IngressV1List
func ParseIngressV1JSON(d []byte) (IngressV1List, error) {
var il IngressV1List
err := json.Unmarshal(d, &il)
return il, err
}
func GetHostsFromIngressRulesV1(ing *IngressV1Item) []string {
hostList := make([]string, 0)
for _, i := range ing.Spec.Rules {
hostList = append(hostList, i.Host)
}
return hostList
}
// String converts BackendPort to string
func (p BackendPort) String() string {
switch v := p.Value.(type) {
case string:
return v
case int:
return strconv.Itoa(v)
default:
return ""
}
}
// Number converts BackendPort to int
func (p BackendPort) Number() (int, bool) {
i, ok := p.Value.(int)
return i, ok
}
func (p *BackendPort) UnmarshalJSON(value []byte) error {
if value[0] == '"' {
var s string
if err := json.Unmarshal(value, &s); err != nil {
return err
}
p.Value = s
return nil
}
var i int
if err := json.Unmarshal(value, &i); err != nil {
return err
}
p.Value = i
return nil
}
func (p BackendPort) MarshalJSON() ([]byte, error) {
switch p.Value.(type) {
case string, int:
return json.Marshal(p.Value)
default:
return nil, errInvalidPortType
}
}