Documentation
¶
Overview ¶
Package mime implements parts of the MIME spec.
Index ¶
- Constants
- func AddExtensionType(ext, typ string) error
- func ExtensionsByType(typ string) ([]string, error)
- func FormatMediaType(t string, param map[string]string) string
- func ParseMediaType(v string) (mediatype string, params map[string]string, err error)
- func TypeByExtension(ext string) string
- type WordDecoder
- type WordEncoder
Examples ¶
Constants ¶
const ( // BEncoding represents Base64 encoding scheme as defined by RFC 2045. BEncoding = WordEncoder('b') // QEncoding represents the Q-encoding scheme as defined by RFC 2047. QEncoding = WordEncoder('q') )
Variables ¶
This section is empty.
Functions ¶
func AddExtensionType ¶
AddExtensionType sets the MIME type associated with the extension ext to typ. The extension should begin with a leading dot, as in ".html".
func ExtensionsByType ¶ added in go1.5
ExtensionsByType returns the extensions known to be associated with the MIME type typ. The returned extensions will each begin with a leading dot, as in ".html". When typ has no associated extensions, ExtensionsByType returns an nil slice.
func FormatMediaType ¶
FormatMediaType serializes mediatype t and the parameters param as a media type conforming to RFC 2045 and RFC 2616. The type and parameter names are written in lower-case. When any of the arguments result in a standard violation then FormatMediaType returns the empty string.
func ParseMediaType ¶
ParseMediaType parses a media type value and any optional parameters, per RFC 1521. Media types are the values in Content-Type and Content-Disposition headers (RFC 2183). On success, ParseMediaType returns the media type converted to lowercase and trimmed of white space and a non-nil map. The returned map, params, maps from the lowercase attribute to the attribute value with its case preserved.
func TypeByExtension ¶
TypeByExtension returns the MIME type associated with the file extension ext. The extension ext should begin with a leading dot, as in ".html". When ext has no associated type, TypeByExtension returns "".
Extensions are looked up first case-sensitively, then case-insensitively.
The built-in table is small but on unix it is augmented by the local system's mime.types file(s) if available under one or more of these names:
/etc/mime.types /etc/apache2/mime.types /etc/apache/mime.types
On Windows, MIME types are extracted from the registry.
Text types have the charset parameter set to "utf-8" by default.
Types ¶
type WordDecoder ¶ added in go1.5
type WordDecoder struct {
// CharsetReader, if non-nil, defines a function to generate
// charset-conversion readers, converting from the provided
// charset into UTF-8.
// Charsets are always lower-case. utf-8, iso-8859-1 and us-ascii charsets
// are handled by default.
// One of the the CharsetReader's result values must be non-nil.
CharsetReader func(charset string, input io.Reader) (io.Reader, error)
}
A WordDecoder decodes MIME headers containing RFC 2047 encoded-words.
func (*WordDecoder) Decode ¶ added in go1.5
func (d *WordDecoder) Decode(word string) (string, error)
Decode decodes an RFC 2047 encoded-word.
Example ¶
package main
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"mime"
)
func main() {
dec := new(mime.WordDecoder)
header, err := dec.Decode("=?utf-8?q?=C2=A1Hola,_se=C3=B1or!?=")
if err != nil {
panic(err)
}
fmt.Println(header)
dec.CharsetReader = func(charset string, input io.Reader) (io.Reader, error) {
switch charset {
case "x-case":
// Fake character set for example.
// Real use would integrate with packages such
// as code.google.com/p/go-charset
content, err := ioutil.ReadAll(input)
if err != nil {
return nil, err
}
return bytes.NewReader(bytes.ToUpper(content)), nil
default:
return nil, fmt.Errorf("unhandled charset %q", charset)
}
}
header, err = dec.Decode("=?x-case?q?hello!?=")
if err != nil {
panic(err)
}
fmt.Println(header)
}
Output: ¡Hola, señor! HELLO!
func (*WordDecoder) DecodeHeader ¶ added in go1.5
func (d *WordDecoder) DecodeHeader(header string) (string, error)
DecodeHeader decodes all encoded-words of the given string. It returns an error if and only if CharsetReader of d returns an error.
Example ¶
package main
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"mime"
)
func main() {
dec := new(mime.WordDecoder)
header, err := dec.DecodeHeader("=?utf-8?q?=C3=89ric?= <[email protected]>, =?utf-8?q?Ana=C3=AFs?= <[email protected]>")
if err != nil {
panic(err)
}
fmt.Println(header)
header, err = dec.DecodeHeader("=?utf-8?q?=C2=A1Hola,?= =?utf-8?q?_se=C3=B1or!?=")
if err != nil {
panic(err)
}
fmt.Println(header)
dec.CharsetReader = func(charset string, input io.Reader) (io.Reader, error) {
switch charset {
case "x-case":
// Fake character set for example.
// Real use would integrate with packages such
// as code.google.com/p/go-charset
content, err := ioutil.ReadAll(input)
if err != nil {
return nil, err
}
return bytes.NewReader(bytes.ToUpper(content)), nil
default:
return nil, fmt.Errorf("unhandled charset %q", charset)
}
}
header, err = dec.DecodeHeader("=?x-case?q?hello_?= =?x-case?q?world!?=")
if err != nil {
panic(err)
}
fmt.Println(header)
}
Output: Éric <[email protected]>, Anaïs <[email protected]> ¡Hola, señor! HELLO WORLD!
type WordEncoder ¶ added in go1.5
type WordEncoder byte
A WordEncoder is an RFC 2047 encoded-word encoder.
func (WordEncoder) Encode ¶ added in go1.5
func (e WordEncoder) Encode(charset, s string) string
Encode returns the encoded-word form of s. If s is ASCII without special characters, it is returned unchanged. The provided charset is the IANA charset name of s. It is case insensitive.
Example ¶
package main
import (
"fmt"
"mime"
)
func main() {
fmt.Println(mime.QEncoding.Encode("utf-8", "¡Hola, señor!"))
fmt.Println(mime.QEncoding.Encode("utf-8", "Hello!"))
fmt.Println(mime.BEncoding.Encode("UTF-8", "¡Hola, señor!"))
fmt.Println(mime.QEncoding.Encode("ISO-8859-1", "Caf\xE9"))
}
Output: =?utf-8?q?=C2=A1Hola,_se=C3=B1or!?= Hello! =?UTF-8?b?wqFIb2xhLCBzZcOxb3Ih?= =?ISO-8859-1?q?Caf=E9?=
Source Files
Directories
¶
| Path | Synopsis |
|---|---|
|
Package multipart implements MIME multipart parsing, as defined in RFC 2046.
|
Package multipart implements MIME multipart parsing, as defined in RFC 2046. |
|
Package quotedprintable implements quoted-printable encoding as specified by RFC 2045.
|
Package quotedprintable implements quoted-printable encoding as specified by RFC 2045. |