66 lines
1.2 KiB
Go
66 lines
1.2 KiB
Go
package base64
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import (
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"bytes"
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"encoding/base64"
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"encoding/binary"
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"fmt"
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)
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func Encode(src []byte) []byte {
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enc := base64.RawURLEncoding
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dst := make([]byte, enc.EncodedLen(len(src)))
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enc.Encode(dst, src)
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return dst
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}
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func EncodeToStringStd(src []byte) string {
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return base64.StdEncoding.EncodeToString(src)
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}
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func EncodeToString(src []byte) string {
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return base64.RawURLEncoding.EncodeToString(src)
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}
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func EncodeUint64ToString(v uint64) string {
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data := make([]byte, 8)
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binary.BigEndian.PutUint64(data, v)
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i := 0
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for ; i < len(data); i++ {
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if data[i] != 0x0 {
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break
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}
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}
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return EncodeToString(data[i:])
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}
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func Decode(src []byte) ([]byte, error) {
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var enc *base64.Encoding
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var isRaw = !bytes.HasSuffix(src, []byte{'='})
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var isURL = !bytes.ContainsAny(src, "+/")
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switch {
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case isRaw && isURL:
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enc = base64.RawURLEncoding
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case isURL:
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enc = base64.URLEncoding
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case isRaw:
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enc = base64.RawStdEncoding
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default:
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enc = base64.StdEncoding
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}
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dst := make([]byte, enc.DecodedLen(len(src)))
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n, err := enc.Decode(dst, src)
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if err != nil {
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return nil, fmt.Errorf(`failed to decode source: %w`, err)
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}
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return dst[:n], nil
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}
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func DecodeString(src string) ([]byte, error) {
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return Decode([]byte(src))
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}
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