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use std::{
fmt,
ops::{Deref, DerefMut},
};
use bytes::buf::Buf;
use serde::de::DeserializeOwned;
use viz_utils::{futures::future::BoxFuture, serde::urlencoded, tracing};
use crate::{
types::{Payload, PayloadDetect, PayloadError},
Context, Extract,
};
#[derive(Clone)]
pub struct Form<T = ()>(pub T);
impl<T> Form<T> {
pub fn into_inner(self) -> T {
self.0
}
}
impl<T> Deref for Form<T> {
type Target = T;
fn deref(&self) -> &T {
&self.0
}
}
impl<T> DerefMut for Form<T> {
fn deref_mut(&mut self) -> &mut T {
&mut self.0
}
}
impl<T: fmt::Debug> fmt::Debug for Form<T> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
T::fmt(&self, f)
}
}
impl<T> Extract for Form<T>
where
T: DeserializeOwned + Send + Sync,
{
type Error = PayloadError;
#[inline]
fn extract<'a>(cx: &'a mut Context) -> BoxFuture<'a, Result<Self, Self::Error>> {
Box::pin(async move { cx.form().await.map(Form) })
}
}
impl PayloadDetect for Form {
#[inline]
fn detect(m: &mime::Mime) -> bool {
m.type_() == mime::APPLICATION && m.subtype() == mime::WWW_FORM_URLENCODED
}
}
impl Context {
pub async fn form<T>(&mut self) -> Result<T, PayloadError>
where
T: DeserializeOwned + Send + Sync,
{
let mut payload = Payload::<Form>::new();
payload.set_limit(self.config().limits.form);
payload.check_header(self.mime(), self.len())?;
urlencoded::from_reader(
payload
.check_real_length(self.take_body().ok_or_else(|| PayloadError::Read)?)
.await?
.reader(),
)
.map_err(|e| {
tracing::debug!("{}", e);
PayloadError::Parse
})
}
}