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
use std::time::SystemTime;
use util::HttpDate;
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Header)]
pub struct IfModifiedSince(HttpDate);
impl IfModifiedSince {
pub fn is_modified(&self, last_modified: SystemTime) -> bool {
self.0 < last_modified.into()
}
}
impl From<SystemTime> for IfModifiedSince {
fn from(time: SystemTime) -> IfModifiedSince {
IfModifiedSince(time.into())
}
}
impl From<IfModifiedSince> for SystemTime {
fn from(date: IfModifiedSince) -> SystemTime {
date.0.into()
}
}
#[cfg(test)]
mod tests {
use std::time::Duration;
use super::*;
#[test]
fn is_modified() {
let newer = SystemTime::now();
let exact = newer - Duration::from_secs(2);
let older = newer - Duration::from_secs(4);
let if_mod = IfModifiedSince::from(exact);
assert!(if_mod.is_modified(newer));
assert!(!if_mod.is_modified(exact));
assert!(!if_mod.is_modified(older));
}
}