Popup for missing objects on the metadata page

closes #94

Signed-off-by: Mikhail Petrov <[email protected]>

Author: mike-petrov

src/Load.js

@@ -32,7 +32,7 @@ const Load = ({
 					objectId: objectIDTemp,
 				});
 			}).catch(() => {
-				onModal('failed', 'Something went wrong, try again');
+				onModal('failed', 'Object not found: missing or expired');
 			});
 		} else {
 			onRedirect('/');

src/api.js

@@ -31,7 +31,9 @@ export default function api(method, url, params = {}, headers = {}) {
 				resolve({ status: 'success' });
 			} else {
 				let res = response;
-				if (method === 'HEAD' && response.headers) {
+				if (method === 'HEAD' && response.status !== 200) {
+					reject(res);
+				} else if (method === 'HEAD' && response.headers) {
 					const res = {
 						'filename': response.headers.get('X-Attribute-Filename'),
 						'containerId': response.headers.get('X-Container-Id'),