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use crate::{error::Error, Context};
use http::StatusCode;
use serde::Deserialize;
pub trait ExtractQuery<'de> {
fn url_query<T: Deserialize<'de>>(&'de self) -> Result<T, Error>;
}
impl<'de, Data> ExtractQuery<'de> for Context<Data> {
#[inline]
fn url_query<T: Deserialize<'de>>(&'de self) -> Result<T, Error> {
let query = self.uri().query();
if query.is_none() {
return Err(Error::from(StatusCode::BAD_REQUEST));
}
Ok(serde_urlencoded::from_str(query.unwrap())
.map_err(|_| Error::from(StatusCode::BAD_REQUEST))?)
}
}
#[cfg(test)]
mod tests {
use super::*;
use futures::executor::block_on;
use http_service::Body;
use http_service_mock::make_server;
use serde_derive::Deserialize;
#[derive(Deserialize)]
struct Params {
msg: String,
}
async fn handler(cx: crate::Context<()>) -> Result<String, Error> {
let p = cx.url_query::<Params>()?;
Ok(p.msg)
}
fn app() -> crate::App<()> {
let mut app = crate::App::new(());
app.at("/").get(handler);
app
}
#[test]
fn successfully_deserialize_query() {
let app = app();
let mut server = make_server(app.into_http_service()).unwrap();
let req = http::Request::get("/?msg=Hello")
.body(Body::empty())
.unwrap();
let res = server.simulate(req).unwrap();
assert_eq!(res.status(), 200);
let body = block_on(res.into_body().into_vec()).unwrap();
assert_eq!(&*body, &*b"Hello");
}
#[test]
fn unsuccessfully_deserialize_query() {
let app = app();
let mut server = make_server(app.into_http_service()).unwrap();
let req = http::Request::get("/").body(Body::empty()).unwrap();
let res = server.simulate(req).unwrap();
assert_eq!(res.status(), 400);
}
#[test]
fn malformatted_query() {
let app = app();
let mut server = make_server(app.into_http_service()).unwrap();
let req = http::Request::get("/?error=should_fail")
.body(Body::empty())
.unwrap();
let res = server.simulate(req).unwrap();
assert_eq!(res.status(), 400);
}
}