tower_web/extract/
http_date_time.rs

1//! HTTP combined date and time value.
2use chrono::{DateTime, Timelike, Utc};
3use extract::{Context, Error, Extract, Immediate};
4use http::{self, header};
5use std::time::SystemTime;
6use util::buf_stream::BufStream;
7
8/// HTTP combined date and time value
9#[derive(Debug, PartialEq, Eq, PartialOrd, Ord)]
10pub struct HttpDateTime(DateTime<Utc>);
11
12impl HttpDateTime {
13    fn normalize(dt: DateTime<Utc>) -> Self {
14        // We don't care about anything smaller than a second
15        let dt = dt
16            .with_nanosecond(0)
17            .expect("Unable to normalize HttpDateTime");
18        HttpDateTime(dt)
19    }
20}
21
22impl From<SystemTime> for HttpDateTime {
23    fn from(t: SystemTime) -> Self {
24        HttpDateTime::normalize(t.into())
25    }
26}
27
28impl http::HttpTryFrom<HttpDateTime> for header::HeaderValue {
29    type Error = header::InvalidHeaderValue;
30
31    fn try_from(t: HttpDateTime) -> Result<header::HeaderValue, Self::Error> {
32        let s = t.0.to_rfc2822();
33        http::HttpTryFrom::try_from(s.as_str())
34    }
35}
36
37impl<B: BufStream> Extract<B> for HttpDateTime {
38    type Future = Immediate<HttpDateTime>;
39
40    fn extract(ctx: &Context) -> Self::Future {
41        use codegen::Source::*;
42
43        match ctx.callsite().source() {
44            Header(header_name) => {
45                let value = match ctx.request().headers().get(header_name) {
46                    Some(value) => value,
47                    None => return Immediate::err(Error::missing_argument()),
48                };
49
50                let value = match value.to_str() {
51                    Ok(s) => s,
52                    Err(_) => return Immediate::err(Error::invalid_argument(&"invalid UTF-8 string")),
53                };
54
55                match DateTime::parse_from_rfc2822(&value) {
56                    Ok(dt) => Immediate::ok(HttpDateTime::normalize(dt.with_timezone(&Utc))),
57                    Err(e) => Immediate::err(Error::invalid_argument(&e)),
58                }
59            }
60            _ => unimplemented!("A HttpDateTime can only be extracted from the headers for now"),
61        }
62    }
63}
tower_web/extract/http_date_time.rs

tower_web/extract/
http_date_time.rs
