| /* |
| Copyright 2015 The Kubernetes 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 cacher |
| |
| import ( |
| "strings" |
| ) |
| |
| // hasPathPrefix returns true if the string matches pathPrefix exactly, or if is prefixed with pathPrefix at a path segment boundary |
| func hasPathPrefix(s, pathPrefix string) bool { |
| // Short circuit if s doesn't contain the prefix at all |
| if !strings.HasPrefix(s, pathPrefix) { |
| return false |
| } |
| |
| pathPrefixLength := len(pathPrefix) |
| |
| if len(s) == pathPrefixLength { |
| // Exact match |
| return true |
| } |
| if strings.HasSuffix(pathPrefix, "/") { |
| // pathPrefix already ensured a path segment boundary |
| return true |
| } |
| if s[pathPrefixLength:pathPrefixLength+1] == "/" { |
| // The next character in s is a path segment boundary |
| // Check this instead of normalizing pathPrefix to avoid allocating on every call |
| return true |
| } |
| return false |
| } |
