2 godlighty -- highly-customizable HTTP, HTTP/2, HTTPS server
3 Copyright (C) 2021-2023 Sergey Matveev <stargrave@stargrave.org>
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, version 3 of the License.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 "golang.org/x/sys/unix"
28 func ctimeETag(fd *os.File) (string, error) {
30 err := unix.Fstat(int(fd.Fd()), &stat)
34 sec, nsec := stat.Ctim.Unix()
35 buf := make([]byte, 8*2)
36 binary.BigEndian.PutUint64(buf[:8], uint64(sec))
37 binary.BigEndian.PutUint64(buf[8:], uint64(nsec))
38 return `"` + base64.RawURLEncoding.EncodeToString(buf) + `"`, nil