Added error handling for download functions to avoid race conditions

backend/src/routes/fs/routes.rs

@@ -461,14 +461,15 @@ pub fn download(span: &Span, req: &mut Request, db: &mut DBConnection) -> Result
             AppError::BadRequest("Unknown node").err()
         } else {
             let file_name = format!("./temp/{}", entry.temp_id);
-            let resp = Response::from_file(File::open(std::path::Path::new(&file_name)).unwrap())
+            Ok(Response::from_file(
+                File::open(std::path::Path::new(&file_name)).map_err(|_| AppError::BadRequest("Unknown file"))?
+            )
             .with_header(header("content-type", "application/zip"))
             .with_header(header(
                 "content-disposition",
                 &("attachment; filename=".to_owned() + &node.name + ".zip")
             ))
-                .boxed();
-            Ok(resp)
+            .boxed())
         }
     }
 }
@@ -527,7 +528,9 @@ pub fn download_preview(
         get_reply(&dto::responses::DownloadBase64 {
             statusCode: 200,
             data: "data:image/png;base64,".to_owned()
-                + &base64::encode(std::fs::read(std::path::Path::new(&file)).unwrap())
+                + &base64::encode(
+                    std::fs::read(std::path::Path::new(&file)).map_err(|_| AppError::BadRequest("Unknown file"))?
+                )
         })
     } else {
         AppError::BadRequest("No preview").err()