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//! Provides the [`SputnikBuilder`] trait.
use std::convert::TryInto;
use cookie::Cookie;
use hyper::{StatusCode, header, http};
use time::{Duration, OffsetDateTime};
use hyper::http::response::Builder;
pub trait SputnikBuilder {
/// Appends a Set-Cookie header.
fn set_cookie(&mut self, cookie: Cookie);
/// Appends a Set-Cookie header to delete a cookie.
fn delete_cookie(&mut self, name: &str);
/// Sets the Content-Type.
fn content_type(self, mime: mime::Mime) -> Builder;
}
pub fn redirect(location: &str, code: StatusCode) -> Builder {
Builder::new().status(code).header(header::LOCATION, location)
}
impl SputnikBuilder for Builder {
fn set_cookie(&mut self, cookie: Cookie) {
if let Some(headers) = self.headers_mut() {
headers.append(header::SET_COOKIE, cookie.encoded().to_string().try_into().unwrap());
}
}
fn delete_cookie(&mut self, name: &str) {
let mut cookie = Cookie::new(name, "");
cookie.set_max_age(Duration::seconds(0));
cookie.set_expires(OffsetDateTime::now_utc() - Duration::days(365));
self.set_cookie(cookie);
}
fn content_type(mut self, mime: mime::Mime) -> Self {
if let Some(headers) = self.headers_mut() {
headers.insert(header::CONTENT_TYPE, mime.to_string().try_into().unwrap());
}
self
}
}
pub trait EmptyBuilder<B> {
/// Consume the builder with an empty body.
fn empty(self) -> http::Result<http::response::Response<B>>;
}
impl EmptyBuilder<hyper::Body> for Builder {
fn empty(self) -> http::Result<http::response::Response<hyper::Body>> {
self.body(hyper::Body::empty())
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_set_cookie() {
let mut builder = Builder::new();
builder.set_cookie(Cookie::new("some", "cookie"));
builder.set_cookie(Cookie::new("some", "cookie"));
let resp = builder.body(hyper::Body::empty()).unwrap();
assert_eq!(resp.headers().len(), 2);
let mut builder = Builder::new()
.header("foo", "invalid\r\n");
// doesn't panic after invalid header
builder.set_cookie(Cookie::new("some", "cookie"));
}
#[test]
fn test_content_type() {
let resp = Builder::new()
.content_type(mime::TEXT_PLAIN)
.content_type(mime::TEXT_HTML)
.body(hyper::Body::empty()).unwrap();
assert_eq!(resp.headers().len(), 1);
assert_eq!(resp.headers().get(header::CONTENT_TYPE).unwrap(), "text/html");
// doesn't panic after invalid header
Builder::new()
.header("foo", "invalid\r\n")
.content_type(mime::TEXT_HTML);
}
}
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