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Source file src/mime/example_test.go

Documentation: mime

     1  // Copyright 2015 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 mime_test
     6  
     7  import (
     8  	"bytes"
     9  	"fmt"
    10  	"io"
    11  	"io/ioutil"
    12  	"mime"
    13  )
    14  
    15  func ExampleWordEncoder_Encode() {
    16  	fmt.Println(mime.QEncoding.Encode("utf-8", "¡Hola, señor!"))
    17  	fmt.Println(mime.QEncoding.Encode("utf-8", "Hello!"))
    18  	fmt.Println(mime.BEncoding.Encode("UTF-8", "¡Hola, señor!"))
    19  	fmt.Println(mime.QEncoding.Encode("ISO-8859-1", "Caf\xE9"))
    20  	// Output:
    21  	// =?utf-8?q?=C2=A1Hola,_se=C3=B1or!?=
    22  	// Hello!
    23  	// =?UTF-8?b?wqFIb2xhLCBzZcOxb3Ih?=
    24  	// =?ISO-8859-1?q?Caf=E9?=
    25  }
    26  
    27  func ExampleWordDecoder_Decode() {
    28  	dec := new(mime.WordDecoder)
    29  	header, err := dec.Decode("=?utf-8?q?=C2=A1Hola,_se=C3=B1or!?=")
    30  	if err != nil {
    31  		panic(err)
    32  	}
    33  	fmt.Println(header)
    34  
    35  	dec.CharsetReader = func(charset string, input io.Reader) (io.Reader, error) {
    36  		switch charset {
    37  		case "x-case":
    38  			// Fake character set for example.
    39  			// Real use would integrate with packages such
    40  			// as code.google.com/p/go-charset
    41  			content, err := ioutil.ReadAll(input)
    42  			if err != nil {
    43  				return nil, err
    44  			}
    45  			return bytes.NewReader(bytes.ToUpper(content)), nil
    46  		default:
    47  			return nil, fmt.Errorf("unhandled charset %q", charset)
    48  		}
    49  	}
    50  	header, err = dec.Decode("=?x-case?q?hello!?=")
    51  	if err != nil {
    52  		panic(err)
    53  	}
    54  	fmt.Println(header)
    55  	// Output:
    56  	// ¡Hola, señor!
    57  	// HELLO!
    58  }
    59  
    60  func ExampleWordDecoder_DecodeHeader() {
    61  	dec := new(mime.WordDecoder)
    62  	header, err := dec.DecodeHeader("=?utf-8?q?=C3=89ric?= <eric@example.org>, =?utf-8?q?Ana=C3=AFs?= <anais@example.org>")
    63  	if err != nil {
    64  		panic(err)
    65  	}
    66  	fmt.Println(header)
    67  
    68  	header, err = dec.DecodeHeader("=?utf-8?q?=C2=A1Hola,?= =?utf-8?q?_se=C3=B1or!?=")
    69  	if err != nil {
    70  		panic(err)
    71  	}
    72  	fmt.Println(header)
    73  
    74  	dec.CharsetReader = func(charset string, input io.Reader) (io.Reader, error) {
    75  		switch charset {
    76  		case "x-case":
    77  			// Fake character set for example.
    78  			// Real use would integrate with packages such
    79  			// as code.google.com/p/go-charset
    80  			content, err := ioutil.ReadAll(input)
    81  			if err != nil {
    82  				return nil, err
    83  			}
    84  			return bytes.NewReader(bytes.ToUpper(content)), nil
    85  		default:
    86  			return nil, fmt.Errorf("unhandled charset %q", charset)
    87  		}
    88  	}
    89  	header, err = dec.DecodeHeader("=?x-case?q?hello_?= =?x-case?q?world!?=")
    90  	if err != nil {
    91  		panic(err)
    92  	}
    93  	fmt.Println(header)
    94  	// Output:
    95  	// Éric <eric@example.org>, Anaïs <anais@example.org>
    96  	// ¡Hola, señor!
    97  	// HELLO WORLD!
    98  }
    99  

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