check status code of upload request

frontend/src/components/home.js

@@ -61,8 +61,7 @@ function read_file(file) {
 }
 
 export function upload_file(file, url) {
-    return new Promise(resolve => {
-        console.log("hi");
+    return new Promise((resolve, reject) => {
         read_file(file).then((content) => {
             fetch(url, {
                 method: 'PUT',
@@ -71,8 +70,13 @@ export function upload_file(file, url) {
                     'Content-Type': 'multipart/form-data',
                 },
                 body: new Blob([content], { type: file.type }),
-            }).then(response => resolve(response));
-        },
-        reject => console.log(reject));
+            }).then((resp) => {
+                if (resp.status >= 200 && resp.status < 300) {
+                    resolve(resp);
+                } else {
+                    reject(resp);
+                }
+            });
+        }).catch(error => reject(error));
     });
 }