Made proxy not panic when not passing query

src/proxy.rs

@@ -94,12 +94,18 @@ impl Handler for ProxyServer
         // We first extract all URL segments starting from the mountpoint
         let segments: PathBuf = req.segments(0..).unwrap();
 
+        let query_part = if let Some(query) = req.uri().query() {
+            format!("?{}", query)
+        }else{
+            String::from("")
+        };
+
         let url = format!(
-            "{}{}/{}?{}",
+            "{}{}/{}{}",
             self.root,
             self.prefix.to_str().unwrap(),
             segments.to_str().unwrap(),
-            req.uri().query().unwrap()
+            query_part
         );
 
         // And finally, the data