/
charset.go
45 lines (39 loc) · 1 KB
/
charset.go
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package charset
import (
"bytes"
"fmt"
"io"
"io/ioutil"
cs "golang.org/x/net/html/charset"
"golang.org/x/text/transform"
)
// Converts given Reader to a UTF-8 bytes
func DecodeReader(s io.Reader, enc string) ([]byte, error) {
reader, err := cs.NewReaderLabel(enc, s)
if err != nil {
return nil, err
}
return ioutil.ReadAll(reader)
}
// Converts given bytes to a UTF-8 bytes
func Decode(s []byte, enc string) ([]byte, error) {
return DecodeReader(bytes.NewReader(s), enc)
}
// Converts a Reader to bytes encoded with given encoding
func EncodeReader(s io.Reader, enc string) ([]byte, error) {
e, _ := cs.Lookup(enc)
if e == nil {
return nil, fmt.Errorf("unsupported charset: %q", enc)
}
var buf bytes.Buffer
writer := transform.NewWriter(&buf, e.NewEncoder())
_, err := io.Copy(writer, s)
if err != nil {
return nil, err
}
return buf.Bytes(), nil
}
// Converts a bytes to a given encoding bytes
func Encode(s []byte, enc string) ([]byte, error) {
return EncodeReader(bytes.NewReader(s), enc)
}