1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
use std::fmt::{self, Display};
use std::io::Write;
use std::str::FromStr;
use std::time::{SystemTime, UNIX_EPOCH};
use bytes::{buf::BufMutExt, BytesMut};
use http::header::{HeaderValue, InvalidHeaderValue};
use time::{offset, OffsetDateTime, PrimitiveDateTime};
use crate::error::ParseError;
use crate::header::IntoHeaderValue;
use crate::time_parser;
#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
pub struct HttpDate(OffsetDateTime);
impl FromStr for HttpDate {
type Err = ParseError;
fn from_str(s: &str) -> Result<HttpDate, ParseError> {
match time_parser::parse_http_date(s) {
Some(t) => Ok(HttpDate(t.assume_utc())),
None => Err(ParseError::Header),
}
}
}
impl Display for HttpDate {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
fmt::Display::fmt(&self.0.format("%a, %d %b %Y %H:%M:%S GMT"), f)
}
}
impl From<OffsetDateTime> for HttpDate {
fn from(dt: OffsetDateTime) -> HttpDate {
HttpDate(dt)
}
}
impl From<SystemTime> for HttpDate {
fn from(sys: SystemTime) -> HttpDate {
HttpDate(PrimitiveDateTime::from(sys).assume_utc())
}
}
impl IntoHeaderValue for HttpDate {
type Error = InvalidHeaderValue;
fn try_into(self) -> Result<HeaderValue, Self::Error> {
let mut wrt = BytesMut::with_capacity(29).writer();
write!(
wrt,
"{}",
self.0
.to_offset(offset!(UTC))
.format("%a, %d %b %Y %H:%M:%S GMT")
)
.unwrap();
HeaderValue::from_maybe_shared(wrt.get_mut().split().freeze())
}
}
impl From<HttpDate> for SystemTime {
fn from(date: HttpDate) -> SystemTime {
let dt = date.0;
let epoch = OffsetDateTime::unix_epoch();
UNIX_EPOCH + (dt - epoch)
}
}
#[cfg(test)]
mod tests {
use super::HttpDate;
use time::{date, time, PrimitiveDateTime};
#[test]
fn test_date() {
let nov_07 = HttpDate(
PrimitiveDateTime::new(date!(1994 - 11 - 07), time!(8:48:37)).assume_utc(),
);
assert_eq!(
"Sun, 07 Nov 1994 08:48:37 GMT".parse::<HttpDate>().unwrap(),
nov_07
);
assert_eq!(
"Sunday, 07-Nov-94 08:48:37 GMT"
.parse::<HttpDate>()
.unwrap(),
nov_07
);
assert_eq!(
"Sun Nov 7 08:48:37 1994".parse::<HttpDate>().unwrap(),
nov_07
);
assert!("this-is-no-date".parse::<HttpDate>().is_err());
}
}