Fix cargo clippy issues

src/main.rs

@@ -90,11 +90,11 @@ fn get_remote_ip(req: &HttpRequest, args: &Args) -> String {
                     .to_str()
                     .unwrap()
                     .to_string()
-                    .split(",")
+                    .split(',')
                     .map(|f| f.to_string())
                     .collect();
 
-                if header.len() > 0 {
+                if !header.is_empty() {
                     ip = header[0].to_string();
                 }
             }
@@ -157,16 +157,18 @@ async fn replace_files(args: web::Data<Args>, req: HttpRequest, mut payload: Mul
                 continue;
             }
 
+            // Remove base URI before extraction
             let mut inner_path_str = &inner_path_str[base_uri.len()..];
-            if inner_path_str.starts_with("/") {
+            if inner_path_str.starts_with('/') {
                 inner_path_str = &inner_path_str[1..];
             }
             let inner_path = Path::new(inner_path_str);
 
-            if inner_path.is_dir() || inner_path_str.ends_with("/") || inner_path_str.is_empty() {
+            if inner_path.is_dir() || inner_path_str.ends_with('/') || inner_path_str.is_empty() {
                 continue;
             }
 
+            // Read file to buffer
             let dest_file = args.storage_path().join(inner_path);
             let mut buf = Vec::with_capacity(file.size() as usize);
             file.read_to_end(&mut buf)?;
@@ -178,7 +180,7 @@ async fn replace_files(args: web::Data<Args>, req: HttpRequest, mut payload: Mul
         }
     }
 
-    // Check if at least a file was sent
+    // Check if at least one file was sent
     if new_files.is_empty() {
         return Err(ErrorBadRequest("No file to extract!"));
     }