Prevent empty archive extraction

src/main.rs

@@ -5,7 +5,7 @@ use actix_files::{Files, NamedFile};
 use actix_multipart::Multipart;
 use actix_web::{App, Error, HttpRequest, HttpResponse, HttpServer, web};
 use actix_web::dev::{fn_service, ServiceRequest, ServiceResponse};
-use actix_web::error::{ErrorInternalServerError, ErrorUnauthorized};
+use actix_web::error::{ErrorBadRequest, ErrorInternalServerError, ErrorUnauthorized};
 use actix_web::middleware::Logger;
 use bytes::BufMut;
 use clap::Parser;
@@ -178,6 +178,11 @@ async fn replace_files(args: web::Data<Args>, req: HttpRequest, mut payload: Mul
         }
     }
 
+    // Check if at least a file was sent
+    if new_files.is_empty() {
+        return Err(ErrorBadRequest("No file to extract!"));
+    }
+
     // Delete all current files in storage
     for entry in std::fs::read_dir(args.storage_path())? {
         let entry = entry?;