parse the x-forwarded-for more carefully

src/main.rs

@@ -14,18 +14,21 @@ impl ServiceTrait<Request<Incoming>> for Service {
     type Future = Pin<Box<dyn Future<Output = Result<Self::Response, Self::Error>> + Send>>;
 
     fn call(&self, req: Request<Incoming>) -> Self::Future {
-        let mut remote_ip = self.remote_ip;
+        let mut remote_ip = self.remote_ip.map(|x| x.ip());
 
         if let Some(ip) = req.headers().get("X-Forwarded-For") {
             if let Ok(str_ip) = ip.to_str() {
                 if let Ok(ip) = str_ip.parse::<SocketAddr>() {
+                    remote_ip = Some(ip.ip());
+                }
+                if let Ok(ip) = str_ip.parse::<IpAddr>() {
                     remote_ip = Some(ip);
                 }
             }
         }
-        
+
         if let Some(ip) = remote_ip {
-            let mut res = Response::new(ip.ip().to_string());
+            let mut res = Response::new(ip.to_string());
             res.headers_mut().append("Content-Type", HeaderValue::from_static("text/plain"));
             Box::pin(async { Ok(res) })
         } else {