108 lines
2.9 KiB
Go
108 lines
2.9 KiB
Go
/*
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Copyright 2020 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 controller
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import (
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"fmt"
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"strings"
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networking "k8s.io/api/networking/v1beta1"
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"k8s.io/ingress-nginx/internal/ingress"
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)
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var (
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pathTypeExact = networking.PathTypeExact
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pathTypePrefix = networking.PathTypePrefix
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)
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// updateServerLocations inspects the generated locations configuration for a server
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// normalizing the path and adding an additional exact location when is possible
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func updateServerLocations(locations []*ingress.Location) []*ingress.Location {
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newLocations := []*ingress.Location{}
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// get Exact locations to check if one already exists
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exactLocations := map[string]*ingress.Location{}
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for _, location := range locations {
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if *location.PathType == pathTypeExact {
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exactLocations[location.Path] = location
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}
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}
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for _, location := range locations {
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// location / does not require any update
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if location.Path == rootLocation {
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newLocations = append(newLocations, location)
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continue
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}
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location.IngressPath = location.Path
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// only Prefix locations could require an additional location block
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if *location.PathType != pathTypePrefix {
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newLocations = append(newLocations, location)
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continue
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}
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// locations with rewrite or using regular expressions are not modified
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if needsRewrite(location) || location.Rewrite.UseRegex {
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newLocations = append(newLocations, location)
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continue
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}
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// If exists an Exact location is not possible to create a new one.
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if _, alreadyExists := exactLocations[location.Path]; alreadyExists {
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// normalize path. Must end in /
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location.Path = normalizePrefixPath(location.Path)
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newLocations = append(newLocations, location)
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continue
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}
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var el ingress.Location = *location
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// normalize path. Must end in /
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location.Path = normalizePrefixPath(location.Path)
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newLocations = append(newLocations, location)
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// add exact location
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exactLocation := &el
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exactLocation.PathType = &pathTypeExact
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newLocations = append(newLocations, exactLocation)
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}
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return newLocations
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}
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func normalizePrefixPath(path string) string {
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if path == rootLocation {
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return rootLocation
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}
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if !strings.HasSuffix(path, "/") {
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return fmt.Sprintf("%v/", path)
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}
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return path
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}
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func needsRewrite(location *ingress.Location) bool {
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if len(location.Rewrite.Target) > 0 && location.Rewrite.Target != location.Path {
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return true
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}
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return false
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}
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