mirror of https://github.com/knative/caching.git
78 lines
2.4 KiB
Go
78 lines
2.4 KiB
Go
/*
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Copyright 2019 The Knative 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 v1alpha1
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import (
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"context"
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corev1 "k8s.io/api/core/v1"
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"knative.dev/pkg/apis"
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)
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// Destination represents a target of an invocation over HTTP.
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type Destination struct {
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// Ref points to an Addressable.
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// +optional
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Ref *corev1.ObjectReference `json:"ref,omitempty"`
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// URI can be an absolute URL(non-empty scheme and non-empty host) pointing to the target or a relative URI. Relative URIs will be resolved using the base URI retrieved from Ref.
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// +optional
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URI *apis.URL `json:"uri,omitempty"`
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}
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func (current *Destination) Validate(ctx context.Context) *apis.FieldError {
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if current != nil {
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return ValidateDestination(*current).ViaField(apis.CurrentField)
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} else {
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return nil
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}
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}
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func ValidateDestination(dest Destination) *apis.FieldError {
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if dest.Ref == nil && dest.URI == nil {
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return apis.ErrGeneric("expected at least one, got neither", "ref", "uri")
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}
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if dest.Ref != nil && dest.URI != nil && dest.URI.URL().IsAbs() {
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return apis.ErrGeneric("Absolute URI is not allowed when Ref is present", "ref", "uri")
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}
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// IsAbs() check whether the URL has a non-empty scheme. Besides the non-empty scheme, we also require dest.URI has a non-empty host
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if dest.Ref == nil && dest.URI != nil && (!dest.URI.URL().IsAbs() || dest.URI.Host == "") {
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return apis.ErrInvalidValue("Relative URI is not allowed when Ref is absent", "uri")
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}
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if dest.Ref != nil && dest.URI == nil{
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return validateDestinationRef(*dest.Ref).ViaField("ref")
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}
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return nil
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}
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func validateDestinationRef(ref corev1.ObjectReference) *apis.FieldError {
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// Check the object.
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var errs *apis.FieldError
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// Required Fields
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if ref.Name == "" {
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errs = errs.Also(apis.ErrMissingField("name"))
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}
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if ref.APIVersion == "" {
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errs = errs.Also(apis.ErrMissingField("apiVersion"))
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}
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if ref.Kind == "" {
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errs = errs.Also(apis.ErrMissingField("kind"))
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}
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return errs
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}
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