package base64

Import Path
	encoding/base64 (on golang.org and go.dev)

Dependency Relation
	imports 3 packages, and imported by 6 packages

Involved Source Files Package base64 implements base64 encoding as specified by RFC 4648.
Code Examples package main import ( "encoding/base64" "fmt" ) func main() { msg := "Hello, 世界" encoded := base64.StdEncoding.EncodeToString([]byte(msg)) fmt.Println(encoded) decoded, err := base64.StdEncoding.DecodeString(encoded) if err != nil { fmt.Println("decode error:", err) return } fmt.Println(string(decoded)) } package main import ( "encoding/base64" "fmt" ) func main() { str := "c29tZSBkYXRhIHdpdGggACBhbmQg77u/" data, err := base64.StdEncoding.DecodeString(str) if err != nil { fmt.Println("error:", err) return } fmt.Printf("%q\n", data) } package main import ( "encoding/base64" "fmt" ) func main() { data := []byte("any + old & data") str := base64.StdEncoding.EncodeToString(data) fmt.Println(str) } package main import ( "encoding/base64" "os" ) func main() { input := []byte("foo\x00bar") encoder := base64.NewEncoder(base64.StdEncoding, os.Stdout) encoder.Write(input) // Must close the encoder when finished to flush any partial blocks. // If you comment out the following line, the last partial block "r" // won't be encoded. encoder.Close() }
Package-Level Type Names (total 2)
/* sort by: | */
( T) Error() string T : error
An Encoding is a radix 64 encoding/decoding scheme, defined by a 64-character alphabet. The most common encoding is the "base64" encoding defined in RFC 4648 and used in MIME (RFC 2045) and PEM (RFC 1421). RFC 4648 also defines an alternate encoding, which is the standard encoding with - and _ substituted for + and /. Decode decodes src using the encoding enc. It writes at most DecodedLen(len(src)) bytes to dst and returns the number of bytes written. If src contains invalid base64 data, it will return the number of bytes successfully written and CorruptInputError. New line characters (\r and \n) are ignored. DecodeString returns the bytes represented by the base64 string s. DecodedLen returns the maximum length in bytes of the decoded data corresponding to n bytes of base64-encoded data. Encode encodes src using the encoding enc, writing EncodedLen(len(src)) bytes to dst. The encoding pads the output to a multiple of 4 bytes, so Encode is not appropriate for use on individual blocks of a large data stream. Use NewEncoder() instead. EncodeToString returns the base64 encoding of src. EncodedLen returns the length in bytes of the base64 encoding of an input buffer of length n. Strict creates a new encoding identical to enc except with strict decoding enabled. In this mode, the decoder requires that trailing padding bits are zero, as described in RFC 4648 section 3.5. Note that the input is still malleable, as new line characters (CR and LF) are still ignored. WithPadding creates a new encoding identical to enc except with a specified padding character, or NoPadding to disable padding. The padding character must not be '\r' or '\n', must not be contained in the encoding's alphabet and must be a rune equal or below '\xff'. func NewEncoding(encoder string) *Encoding func Encoding.Strict() *Encoding func Encoding.WithPadding(padding rune) *Encoding func NewDecoder(enc *Encoding, r io.Reader) io.Reader func NewEncoder(enc *Encoding, w io.Writer) io.WriteCloser var RawStdEncoding *Encoding var RawURLEncoding *Encoding var StdEncoding *Encoding var URLEncoding *Encoding
Package-Level Functions (total 3)
NewDecoder constructs a new base64 stream decoder.
NewEncoder returns a new base64 stream encoder. Data written to the returned writer will be encoded using enc and then written to w. Base64 encodings operate in 4-byte blocks; when finished writing, the caller must Close the returned encoder to flush any partially written blocks.
NewEncoding returns a new padded Encoding defined by the given alphabet, which must be a 64-byte string that does not contain the padding character or CR / LF ('\r', '\n'). The resulting Encoding uses the default padding character ('='), which may be changed or disabled via WithPadding.
Package-Level Variables (total 4)
RawStdEncoding is the standard raw, unpadded base64 encoding, as defined in RFC 4648 section 3.2. This is the same as StdEncoding but omits padding characters.
RawURLEncoding is the unpadded alternate base64 encoding defined in RFC 4648. It is typically used in URLs and file names. This is the same as URLEncoding but omits padding characters.
StdEncoding is the standard base64 encoding, as defined in RFC 4648.
URLEncoding is the alternate base64 encoding defined in RFC 4648. It is typically used in URLs and file names.
Package-Level Constants (total 2)
const NoPadding rune = -1 // No padding
const StdPadding rune = 61 // Standard padding character