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use std::str::FromStr;
use std::fmt::{self, Display};
use time;
#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
pub struct HttpDate(pub time::Tm);
impl FromStr for HttpDate {
type Err = ::Error;
fn from_str(s: &str) -> ::Result<HttpDate> {
match time::strptime(s, "%a, %d %b %Y %T %Z").or_else(|_| {
time::strptime(s, "%A, %d-%b-%y %T %Z")
}).or_else(|_| {
time::strptime(s, "%c")
}) {
Ok(t) => Ok(HttpDate(t)),
Err(_) => Err(::Error::Header),
}
}
}
impl Display for HttpDate {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Display::fmt(&self.0.to_utc().rfc822(), f)
}
}
#[cfg(test)]
mod tests {
use time::Tm;
use super::HttpDate;
const NOV_07: HttpDate = HttpDate(Tm {
tm_nsec: 0,
tm_sec: 37,
tm_min: 48,
tm_hour: 8,
tm_mday: 7,
tm_mon: 10,
tm_year: 94,
tm_wday: 0,
tm_isdst: 0,
tm_yday: 0,
tm_utcoff: 0,
});
#[test]
fn test_imf_fixdate() {
assert_eq!("Sun, 07 Nov 1994 08:48:37 GMT".parse::<HttpDate>().unwrap(), NOV_07);
}
#[test]
fn test_rfc_850() {
assert_eq!("Sunday, 07-Nov-94 08:48:37 GMT".parse::<HttpDate>().unwrap(), NOV_07);
}
#[test]
fn test_asctime() {
assert_eq!("Sun Nov 7 08:48:37 1994".parse::<HttpDate>().unwrap(), NOV_07);
}
#[test]
fn test_no_date() {
assert!("this-is-no-date".parse::<HttpDate>().is_err());
}
}