Improve some code

src/utils/network_utils.rs

@@ -25,16 +25,13 @@ pub fn get_remote_ip(req: &HttpRequest, proxy_ip: Option<&str>) -> String {
     if let Some(proxy) = proxy_ip.as_ref() {
         if match_ip(proxy, &ip) {
             if let Some(header) = req.headers().get("X-Forwarded-For") {
-                let header: Vec<String> = header
+                let header = header
                     .to_str()
                     .unwrap()
-                    .to_string()
-                    .split(',')
-                    .map(|f| f.to_string())
-                    .collect();
+                    .split_once(',');
 
-                if !header.is_empty() {
-                    ip = header[0].to_string();
+                if let Some((upstream_ip, _)) = header {
+                    ip = upstream_ip.to_string();
                 }
             }
         }