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use super::{rejection::*, FromRequestParts};
use async_trait::async_trait;
use http::request::Parts;
use serde::de::DeserializeOwned;
use std::ops::Deref;
#[cfg_attr(docsrs, doc(cfg(feature = "query")))]
#[derive(Debug, Clone, Copy, Default)]
pub struct Query<T>(pub T);
#[async_trait]
impl<T, S> FromRequestParts<S> for Query<T>
where
T: DeserializeOwned,
S: Send + Sync,
{
type Rejection = QueryRejection;
async fn from_request_parts(parts: &mut Parts, _state: &S) -> Result<Self, Self::Rejection> {
let query = parts.uri.query().unwrap_or_default();
let value = serde_urlencoded::from_str(query)
.map_err(FailedToDeserializeQueryString::__private_new)?;
Ok(Query(value))
}
}
impl<T> Deref for Query<T> {
type Target = T;
fn deref(&self) -> &Self::Target {
&self.0
}
}
#[cfg(test)]
mod tests {
use super::*;
use axum_core::extract::FromRequest;
use http::Request;
use serde::Deserialize;
use std::fmt::Debug;
async fn check<T>(uri: impl AsRef<str>, value: T)
where
T: DeserializeOwned + PartialEq + Debug,
{
let req = Request::builder().uri(uri.as_ref()).body(()).unwrap();
assert_eq!(Query::<T>::from_request(req, &()).await.unwrap().0, value);
}
#[tokio::test]
async fn test_query() {
#[derive(Debug, PartialEq, Deserialize)]
struct Pagination {
size: Option<u64>,
page: Option<u64>,
}
check(
"http://example.com/test",
Pagination {
size: None,
page: None,
},
)
.await;
check(
"http://example.com/test?size=10",
Pagination {
size: Some(10),
page: None,
},
)
.await;
check(
"http://example.com/test?size=10&page=20",
Pagination {
size: Some(10),
page: Some(20),
},
)
.await;
}
}