use std::{convert::TryInto, str::FromStr};
use crate::headers::{HeaderName, HeaderValue, Headers, CONTENT_TYPE};
use crate::Mime;
#[derive(Debug)]
pub struct ContentType {
media_type: Mime,
}
impl ContentType {
pub fn new<U>(media_type: U) -> Self
where
U: TryInto<Mime>,
U::Error: std::fmt::Debug,
{
Self {
media_type: media_type
.try_into()
.expect("could not convert into a valid Mime type"),
}
}
pub fn from_headers(headers: impl AsRef<Headers>) -> crate::Result<Option<Self>> {
let headers = match headers.as_ref().get(CONTENT_TYPE) {
Some(headers) => headers,
None => return Ok(None),
};
let ctation = headers.iter().last().unwrap();
let media_type = Mime::from_str(ctation.as_str()).map_err(|mut e| {
e.set_status(400);
e
})?;
Ok(Some(Self { media_type }))
}
pub fn apply(&self, mut headers: impl AsMut<Headers>) {
headers.as_mut().insert(self.name(), self.value());
}
pub fn name(&self) -> HeaderName {
CONTENT_TYPE
}
pub fn value(&self) -> HeaderValue {
let output = format!("{}", self.media_type);
unsafe { HeaderValue::from_bytes_unchecked(output.into()) }
}
}
impl PartialEq<Mime> for ContentType {
fn eq(&self, other: &Mime) -> bool {
&self.media_type == other
}
}
impl PartialEq<&Mime> for ContentType {
fn eq(&self, other: &&Mime) -> bool {
&&self.media_type == other
}
}
impl From<Mime> for ContentType {
fn from(media_type: Mime) -> Self {
Self { media_type }
}
}
#[cfg(test)]
mod test {
use super::*;
use crate::headers::Headers;
#[test]
fn smoke() -> crate::Result<()> {
let ct = ContentType::new(Mime::from_str("text/*")?);
let mut headers = Headers::new();
ct.apply(&mut headers);
let ct = ContentType::from_headers(headers)?.unwrap();
assert_eq!(
ct.value(),
format!("{}", Mime::from_str("text/*")?).as_str()
);
Ok(())
}
#[test]
fn bad_request_on_parse_error() {
let mut headers = Headers::new();
headers.insert(CONTENT_TYPE, "<nori ate the tag. yum.>");
let err = ContentType::from_headers(headers).unwrap_err();
assert_eq!(err.status(), 400);
}
}