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use std::ops::{Deref, DerefMut};
use serde::de::DeserializeOwned;
use crate::{error::ParseQueryError, FromRequest, Request, RequestBody, Result};
#[derive(Debug, Clone, Eq, PartialEq, Default)]
pub struct Query<T>(pub T);
impl<T> Deref for Query<T> {
type Target = T;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl<T> DerefMut for Query<T> {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.0
}
}
impl<T: DeserializeOwned> Query<T> {
async fn internal_from_request(req: &Request) -> Result<Self, ParseQueryError> {
Ok(serde_urlencoded::from_str(req.uri().query().unwrap_or_default()).map(Self)?)
}
}
#[async_trait::async_trait]
impl<'a, T: DeserializeOwned> FromRequest<'a> for Query<T> {
async fn from_request(req: &'a Request, _body: &mut RequestBody) -> Result<Self> {
Self::internal_from_request(req).await.map_err(Into::into)
}
}
#[cfg(test)]
mod tests {
use serde::Deserialize;
use super::*;
use crate::{handler, http::Uri, Endpoint};
#[tokio::test]
async fn test_query_extractor() {
#[derive(Deserialize)]
struct CreateResource {
name: String,
value: i32,
}
#[handler(internal)]
async fn index(query: Query<CreateResource>) {
assert_eq!(query.name, "abc");
assert_eq!(query.value, 100);
}
index
.call(
Request::builder()
.uri(Uri::from_static("/?name=abc&value=100"))
.finish(),
)
.await
.unwrap();
}
}