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challenge_payload.go
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challenge_payload.go
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/*
Copyright 2020 The cert-manager 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.
*/
package challengepayload
import (
"context"
"fmt"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apiserver/pkg/registry/rest"
"github.com/jetstack/cert-manager/pkg/acme/webhook"
"github.com/jetstack/cert-manager/pkg/acme/webhook/apis/acme/v1alpha1"
)
type REST struct {
hookFn webhook.Solver
}
var _ rest.Creater = &REST{}
var _ rest.Scoper = &REST{}
var _ rest.GroupVersionKindProvider = &REST{}
func NewREST(hookFn webhook.Solver) *REST {
return &REST{
hookFn: hookFn,
}
}
func (r *REST) New() runtime.Object {
return &v1alpha1.ChallengePayload{}
}
func (r *REST) GroupVersionKind(containingGV schema.GroupVersion) schema.GroupVersionKind {
return v1alpha1.SchemeGroupVersion.WithKind("ChallengePayload")
}
func (r *REST) NamespaceScoped() bool {
return false
}
func (r *REST) Create(ctx context.Context, obj runtime.Object, _ rest.ValidateObjectFunc, _ *metav1.CreateOptions) (runtime.Object, error) {
payload, ok := obj.(*v1alpha1.ChallengePayload)
if !ok {
return nil, fmt.Errorf("resource is not of type ChallengePayload")
}
if payload.Request == nil {
return nil, fmt.Errorf("payload request field cannot be empty")
}
resp, err := r.callSolver(*payload.Request)
if err != nil {
return nil, err
}
payload.Response = &resp
return payload, nil
}
// callSolver will call the appropriate method on the REST handlers Solver.
// It will only return an error if setting up the solver fails.
func (r *REST) callSolver(req v1alpha1.ChallengeRequest) (v1alpha1.ChallengeResponse, error) {
var fn func(*v1alpha1.ChallengeRequest) error
switch req.Action {
case v1alpha1.ChallengeActionPresent:
fn = r.hookFn.Present
case v1alpha1.ChallengeActionCleanUp:
fn = r.hookFn.CleanUp
default:
return v1alpha1.ChallengeResponse{}, fmt.Errorf("unknown action type %q", req.Action)
}
err := fn(&req)
if err == nil {
return v1alpha1.ChallengeResponse{
UID: req.UID,
Success: true,
}, nil
}
return v1alpha1.ChallengeResponse{
UID: req.UID,
Result: &metav1.Status{
Status: "Failed",
Message: err.Error(),
// TODO: utilise Reason field etc.
},
}, nil
}