use std::{collections::BTreeMap, sync::Arc};
use serde_json::Value;
use crate::{
middleware::{CookieJarManager, CookieJarManagerEndpoint},
session::{CookieConfig, Session, SessionStatus},
Endpoint, Middleware, Request, Result,
};
pub struct CookieSession {
config: Arc<CookieConfig>,
}
impl CookieSession {
pub fn new(config: CookieConfig) -> Self {
Self {
config: Arc::new(config),
}
}
}
impl<E: Endpoint> Middleware<E> for CookieSession {
type Output = CookieJarManagerEndpoint<CookieSessionEndpoint<E>>;
fn transform(&self, ep: E) -> Self::Output {
CookieJarManager::new().transform(CookieSessionEndpoint {
inner: ep,
config: self.config.clone(),
})
}
}
pub struct CookieSessionEndpoint<E> {
inner: E,
config: Arc<CookieConfig>,
}
impl<E: Endpoint> Endpoint for CookieSessionEndpoint<E> {
type Output = E::Output;
async fn call(&self, mut req: Request) -> Result<Self::Output> {
let cookie_jar = req.cookie().clone();
let session = self
.config
.get_cookie_value(&cookie_jar)
.and_then(|value| serde_json::from_str::<BTreeMap<String, Value>>(&value).ok())
.map(Session::new)
.unwrap_or_default();
req.extensions_mut().insert(session.clone());
let resp = self.inner.call(req).await?;
match session.status() {
SessionStatus::Changed | SessionStatus::Renewed => {
self.config.set_cookie_value(
&cookie_jar,
&serde_json::to_string(&session.entries()).unwrap_or_default(),
);
}
SessionStatus::Purged => {
self.config.remove_cookie(&cookie_jar);
}
SessionStatus::Unchanged => {}
};
Ok(resp)
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::{
session::test_harness::{index, TestClient},
EndpointExt, Route,
};
#[tokio::test]
async fn cookie_session() {
let app = Route::new()
.at("/:action", index)
.with(CookieSession::new(CookieConfig::default()));
let mut client = TestClient::default();
client.call(&app, 0).await;
client.assert_cookies(vec![]);
client.call(&app, 1).await;
client.assert_cookies(vec![("poem-session", r#"{"a":10,"b":20}"#)]);
client.call(&app, 2).await;
client.assert_cookies(vec![("poem-session", r#"{"a":10,"b":20,"c":30}"#)]);
client.call(&app, 7).await;
client.call(&app, 6).await;
client.assert_cookies(vec![("poem-session", r#"{"a":10,"b":20,"c":30}"#)]);
client.call(&app, 3).await;
client.assert_cookies(vec![("poem-session", r#"{"a":10,"c":30}"#)]);
client.call(&app, 4).await;
client.assert_cookies(vec![("poem-session", r#"{}"#)]);
client.call(&app, 5).await;
client.assert_cookies(vec![]);
}
}