add: ip test api

crates/app/src/routes/api/v1/mod.rs

@@ -26,6 +26,7 @@ pub fn routes() -> Router {
         // misc
         .route("/util/proxy", get(util::proxy_request))
         .route("/util/lang", get(util::set_langfile_request))
+        .route("/util/ip", get(util::ip_test_request))
         // reactions
         .route("/reactions", post(reactions::create_request))
         .route("/reactions/{id}", get(reactions::get_request))

crates/app/src/routes/api/v1/util.rs

@@ -1,6 +1,12 @@
 use super::auth::images::read_image;
 use crate::State;
-use axum::{Extension, body::Body, extract::Query, http::HeaderMap, response::IntoResponse};
+use axum::{
+    body::Body,
+    extract::Query,
+    http::{HeaderMap, HeaderValue},
+    response::IntoResponse,
+    Extension,
+};
 use pathbufd::PathBufD;
 use serde::Deserialize;
 
@@ -131,3 +137,16 @@ pub async fn set_langfile_request(Query(props): Query<LangFileQuery>) -> impl In
         "Language changed",
     )
 }
+
+pub async fn ip_test_request(
+    headers: HeaderMap,
+    Extension(data): Extension<State>,
+) -> impl IntoResponse {
+    let data = &(data.read().await).0;
+    headers
+        .get(data.0.security.real_ip_header.to_owned())
+        .unwrap_or(&HeaderValue::from_static(""))
+        .to_str()
+        .unwrap_or("")
+        .to_string()
+}