python - Exchanging NDB Entities between two GAE web apps using URL Fetch -

i planning exchange ndb entities between 2 gae web apps using url fetch.

one web app can initiate http post request entity model name, starting entity index number , number of entities fetched. each entity have index number incremented sequentially new entities.

to send entity:
delimiter added separate different entities separate properties of entity. http response have variable (say "content") containing entity data.

receiving side web app:
receiver web app parse received data , store entities , property values creating new entities , "put"ting them

both web apps running gae python , have same models.

my questions: there disadvantage above method? there better way achieve in automated way in code?

i intend implement kind of infrequent data backup design implementation

you can use ndb to_dict() method entity , use json exchange te data. if lot of data can use cursor.

to exchange entity keys, can add safe key dict.