--- ui/web/json_api.py.dist	2019-06-12 23:17:45.000000000 +0200
+++ ui/web/json_api.py	2020-05-03 19:29:23.309721987 +0200
@@ -724,7 +724,8 @@
         Add torrents by file
 
         :param torrents: A list of dictionaries containing the torrent \
-            path and torrent options to add with.
+            path, torrent data and torrent options to add with. Torrent data \
+            is optional and must be encoded with base64.
         :type torrents: list
 
         ::
@@ -748,8 +749,10 @@
                 deferreds.append(d)
             else:
                 filename = os.path.basename(torrent['path'])
-                with open(torrent['path'], 'rb') as _file:
-                    fdump = b64encode(_file.read())
+                fdump = torrent.pop("data", None)
+                if fdump == None:
+                    with open(torrent['path'], 'rb') as _file:
+                        fdump = b64encode(_file.read())
                 log.info(
                     'Adding torrent from file `%s` with options `%r`',
                     filename,
@@ -759,7 +764,7 @@
                     filename, fdump, torrent['options']
                 )
                 deferreds.append(d)
-        return DeferredList(deferreds, consumeErrors=False)
+        return DeferredList(deferreds, consumeErrors=True, fireOnOneErrback=True)
 
     def _get_host(self, host_id):
         """Information about a host from supplied host id.