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time: posix: add epoch_to_rfc2822

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This is the format used in the 'Date' header in mails.

Signed-off-by: Lukas Wagner <l.wagner@proxmox.com>
This commit is contained in:
Lukas Wagner 2023-12-11 14:29:07 +01:00 committed by Wolfgang Bumiller
parent 795b3a57a7
commit 1384bd9161
1 changed files with 17 additions and 0 deletions
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17
proxmox-time/src/posix.rs
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@ -371,6 +371,15 @@ fn parse_rfc3339_do(input_str: &str) -> Result<i64, Error> {
Ok(epoch)
}
/// Convert Unix epoch into RFC2822 local time with TZ
pub fn epoch_to_rfc2822(epoch: i64) -> Result<String, Error> {
let localtime = localtime(epoch)?;
let locale = Locale::new(libc::LC_ALL, Locale::C)?;
let rfc2822_date = strftime_l("%a, %d %b %Y %T %z", &localtime, &locale)?;
Ok(rfc2822_date)
}
#[test]
fn test_leap_seconds() {
let convert_reconvert = |epoch| {
@ -490,3 +499,11 @@ fn test_strftime_l() {
assert_eq!(formatted, "Tue, 29 Dec 2020 17:30:00 +0000");
}
#[test]
fn test_epoch_to_rfc2822() {
let epoch = 1609263000;
// Output is TZ-dependent, so only verify that it did not fail.
// Internally, it uses strftime_l which we test already.
assert!(epoch_to_rfc2822(epoch).is_ok());
}