1 /* 2 Copyright 2018 The Kubernetes Authors. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 package printers 18 19 import ( 20 "strings" 21 ) 22 23 var ( 24 InternalObjectPrinterErr = "a versioned object must be passed to a printer" 25 26 // disallowedPackagePrefixes contains regular expression templates 27 // for object package paths that are not allowed by printers. 28 disallowedPackagePrefixes = []string{ 29 "k8s.io/kubernetes/pkg/apis/", 30 } 31 ) 32 33 var InternalObjectPreventer = &illegalPackageSourceChecker{disallowedPackagePrefixes} 34 35 func IsInternalObjectError(err error) bool { 36 if err == nil { 37 return false 38 } 39 40 return err.Error() == InternalObjectPrinterErr 41 } 42 43 // illegalPackageSourceChecker compares a given 44 // object's package path, and determines if the 45 // object originates from a disallowed source. 46 type illegalPackageSourceChecker struct { 47 // disallowedPrefixes is a slice of disallowed package path 48 // prefixes for a given runtime.Object that we are printing. 49 disallowedPrefixes []string 50 } 51 52 func (c *illegalPackageSourceChecker) IsForbidden(pkgPath string) bool { 53 for _, forbiddenPrefix := range c.disallowedPrefixes { 54 if strings.HasPrefix(pkgPath, forbiddenPrefix) || strings.Contains(pkgPath, "/vendor/"+forbiddenPrefix) { 55 return true 56 } 57 } 58 59 return false 60 } 61