log useragent on login

src/tera/auth.rs

@@ -2,12 +2,13 @@ use rocket::{
     form::Form,
     get,
     http::{Cookie, CookieJar},
+    outcome::Outcome,
     post,
-    request::FlashMessage,
+    request::{FlashMessage, FromRequest},
     response::{Flash, Redirect},
     routes,
     time::{Duration, OffsetDateTime},
-    FromForm, Route, State,
+    FromForm, Request, Route, State,
 };
 use rocket_dyn_templates::{context, tera, Template};
 use serde_json::json;
@@ -39,12 +40,37 @@ struct LoginForm<'r> {
     password: &'r str,
 }
 
+#[derive(Debug)]
+pub struct UserAgent(String);
+
+#[rocket::async_trait]
+impl<'r> FromRequest<'r> for UserAgent {
+    type Error = std::convert::Infallible;
+
+    async fn from_request(
+        request: &'r Request<'_>,
+    ) -> rocket::request::Outcome<UserAgent, Self::Error> {
+        let agent = request
+            .headers()
+            .get_one("User-Agent")
+            .unwrap_or("Unknown")
+            .to_string();
+        Outcome::Success(UserAgent(agent))
+    }
+}
+
 #[post("/", data = "<login>")]
 async fn login(
     login: Form<LoginForm<'_>>,
     db: &State<SqlitePool>,
     cookies: &CookieJar<'_>,
+    agent: UserAgent,
 ) -> Flash<Redirect> {
+    Log::create(
+        db,
+        format!("{} has this useragent: {:?}", login.name, agent),
+    )
+    .await;
     let user = match User::login(db, login.name, login.password).await {
         Ok(user) => user,
         Err(LoginError::NoPasswordSet(user)) => {