sigs.k8s.io/prow@v0.0.0-20240503223140-c5e374dc7eb1/pkg/pod-utils/gcs/metadata.go (about) 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 gcs 18 19 import ( 20 "mime" 21 "strings" 22 23 utilpointer "k8s.io/utils/pointer" 24 "sigs.k8s.io/prow/pkg/io" 25 ) 26 27 // WriterOptionsFromFileName guesses file attributes from the filename 28 // and returns the writerOptions and a simplified filename. For example, 29 // build-log.txt.gz would be: 30 // 31 // Content-Type: text/plain; charset=utf-8 32 // Content-Encoding: gzip 33 // 34 // and the simplified filename would be build-log.txt (excluding the 35 // content encoding extension). 36 func WriterOptionsFromFileName(filename string) (string, io.WriterOptions) { 37 attrs := io.WriterOptions{} 38 segments := strings.Split(filename, ".") 39 index := len(segments) - 1 40 segment := segments[index] 41 42 // https://www.iana.org/assignments/http-parameters/http-parameters.xhtml#content-coding 43 switch segment { 44 case "gz", "gzip": 45 attrs.ContentEncoding = utilpointer.String("gzip") 46 } 47 48 if attrs.ContentEncoding != nil { 49 if index == 0 { 50 segment = "" 51 } else { 52 filename = filename[:len(filename)-len(segment)-1] 53 index -= 1 54 segment = segments[index] 55 } 56 } 57 58 if segment != "" { 59 mediaType := mime.TypeByExtension("." + segment) 60 if mediaType != "" { 61 attrs.ContentType = utilpointer.String(mediaType) 62 } 63 } 64 65 if attrs.ContentType == nil && attrs.ContentEncoding != nil && *attrs.ContentEncoding == "gzip" { 66 attrs.ContentType = utilpointer.String("application/gzip") 67 attrs.ContentEncoding = nil 68 } 69 70 return filename, attrs 71 }