65 lines
1.7 KiB
Go
65 lines
1.7 KiB
Go
/*
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Copyright 2018 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 backendprotocol
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import (
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"regexp"
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"strings"
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networking "k8s.io/api/networking/v1beta1"
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"k8s.io/klog"
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"k8s.io/ingress-nginx/internal/ingress/annotations/parser"
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"k8s.io/ingress-nginx/internal/ingress/resolver"
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)
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// HTTP protocol
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const HTTP = "HTTP"
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var (
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validProtocols = regexp.MustCompile(`^(HTTP|HTTPS|AJP|GRPC|GRPCS)$`)
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)
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type backendProtocol struct {
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r resolver.Resolver
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}
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// NewParser creates a new backend protocol annotation parser
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func NewParser(r resolver.Resolver) parser.IngressAnnotation {
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return backendProtocol{r}
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}
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// ParseAnnotations parses the annotations contained in the ingress
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// rule used to indicate the backend protocol.
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func (a backendProtocol) Parse(ing *networking.Ingress) (interface{}, error) {
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if ing.GetAnnotations() == nil {
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return HTTP, nil
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}
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proto, err := parser.GetStringAnnotation("backend-protocol", ing)
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if err != nil {
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return HTTP, nil
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}
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proto = strings.TrimSpace(strings.ToUpper(proto))
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if !validProtocols.MatchString(proto) {
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klog.Warningf("Protocol %v is not a valid value for the backend-protocol annotation. Using HTTP as protocol", proto)
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return HTTP, nil
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}
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return proto, nil
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}
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