forked from gitea/gitea
35 lines
640 B
Go
35 lines
640 B
Go
package bom
|
|
|
|
import (
|
|
"bytes"
|
|
"io"
|
|
"io/ioutil"
|
|
)
|
|
|
|
const (
|
|
bom0 = 0xef
|
|
bom1 = 0xbb
|
|
bom2 = 0xbf
|
|
)
|
|
|
|
// CleanBom returns b with the 3 byte BOM stripped off the front if it is present.
|
|
// If the BOM is not present, then b is returned.
|
|
func CleanBom(b []byte) []byte {
|
|
if len(b) >= 3 &&
|
|
b[0] == bom0 &&
|
|
b[1] == bom1 &&
|
|
b[2] == bom2 {
|
|
return b[3:]
|
|
}
|
|
return b
|
|
}
|
|
|
|
// NewReaderWithoutBom returns an io.Reader that will skip over initial UTF-8 byte order marks.
|
|
func NewReaderWithoutBom(r io.Reader) (io.Reader, error) {
|
|
bs, err := ioutil.ReadAll(r)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return bytes.NewReader(CleanBom(bs)), nil
|
|
}
|