1 // Copyright 2013 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package tar_test 6 7 import ( 8 "archive/tar" 9 "bytes" 10 "fmt" 11 "io" 12 "log" 13 "os" 14 ) 15 16 func Example() { 17 // Create a buffer to write our archive to. 18 buf := new(bytes.Buffer) 19 20 // Create a new tar archive. 21 tw := tar.NewWriter(buf) 22 23 // Add some files to the archive. 24 var files = []struct { 25 Name, Body string 26 }{ 27 {"readme.txt", "This archive contains some text files."}, 28 {"gopher.txt", "Gopher names:\nGeorge\nGeoffrey\nGonzo"}, 29 {"todo.txt", "Get animal handling licence."}, 30 } 31 for _, file := range files { 32 hdr := &tar.Header{ 33 Name: file.Name, 34 Mode: 0600, 35 Size: int64(len(file.Body)), 36 } 37 if err := tw.WriteHeader(hdr); err != nil { 38 log.Fatalln(err) 39 } 40 if _, err := tw.Write([]byte(file.Body)); err != nil { 41 log.Fatalln(err) 42 } 43 } 44 // Make sure to check the error on Close. 45 if err := tw.Close(); err != nil { 46 log.Fatalln(err) 47 } 48 49 // Open the tar archive for reading. 50 r := bytes.NewReader(buf.Bytes()) 51 tr := tar.NewReader(r) 52 53 // Iterate through the files in the archive. 54 for { 55 hdr, err := tr.Next() 56 if err == io.EOF { 57 // end of tar archive 58 break 59 } 60 if err != nil { 61 log.Fatalln(err) 62 } 63 fmt.Printf("Contents of %s:\n", hdr.Name) 64 if _, err := io.Copy(os.Stdout, tr); err != nil { 65 log.Fatalln(err) 66 } 67 fmt.Println() 68 } 69 70 // Output: 71 // Contents of readme.txt: 72 // This archive contains some text files. 73 // Contents of gopher.txt: 74 // Gopher names: 75 // George 76 // Geoffrey 77 // Gonzo 78 // Contents of todo.txt: 79 // Get animal handling licence. 80 } 81
