Specify server to probe against using query string

Cargo.lock

@@ -618,5 +618,6 @@ name = "xmpp-blackbox-exporter"
 version = "0.1.0"
 dependencies = [
  "axum",
+ "serde",
  "tokio",
 ]

Cargo.toml

@@ -5,4 +5,5 @@ edition = "2021"
 
 [dependencies]
 axum = "0.8.4"
+serde = { version = "1.0.219", features = ["derive"] }
 tokio = { version = "1.45.1", features = ["rt-multi-thread"] }

src/main.rs

@@ -1,7 +1,17 @@
 use axum::{
+    extract::Query,
     routing::get,
     Router,
 };
+use serde::Deserialize;
+
+#[derive(Deserialize)]
+struct ProbeClientToServerQuery {
+    domain: String,
+    hostname: String,
+    port: u16,
+}
+
 
 #[tokio::main]
 async fn main() {
@@ -31,11 +41,12 @@ async fn main() {
 
     let app = Router::new()
         .route("/", get(route_index))
-        .route("/probe", get(route_probe));
+        .route("/probe-client-to-server", get(route_probe_client_to_server));
 
     let listener = tokio::net::TcpListener::bind(listen).await.unwrap();
     println!("Server listening on: http://{}", listener.local_addr().unwrap());
-    println!("Probe with: http://{}/probe", listener.local_addr().unwrap());
+    println!("Probe with:");
+    println!("  http://{}/probe-client-to-server?domain=fem-net.de&hostname=xmpp-2.net.clerie.de&port=5222", listener.local_addr().unwrap());
 
     axum::serve(listener, app).await.unwrap();
 }
@@ -44,9 +55,11 @@ async fn route_index() -> String {
     return String::from("Prometheus exporter for checking XMPP server availability");
 }
 
-async fn route_probe() -> Result<String, String> {
+async fn route_probe_client_to_server(
+    Query(query): Query<ProbeClientToServerQuery>,
+) -> Result<String, String> {
     let mut out = String::new();
-    out.push_str("hallo welt");
+    out.push_str(&format!("{} {}:{}", query.domain, query.hostname, query.port));
 
     return Ok(out);
 }