I have a REST server and a client application running on a mobile device. The client has some data and would like to receive data updates from the server. How to do it with RESTful in a single transaction ?
Suppose a customer has the following elements:
widget id=1 timestamp=2010-03-05T08:00:00
doodad id=1 widget=1 timestamp=2010-03-05T08:10
doodad id=2 widget=1 timestamp=2010-03-05T08:20
widget id=2 timestamp=2010-03-05T09:00:00
doodad id=3 widget=2 timestamp=2010-03-05T08:10
and the server has
widget id=1 timestamp=2010-03-05T08:00:00
doodad id=1 widget=1 timestamp=2010-03-05T08:10
doodad id=2 widget=1 timestamp=2010-03-05T09:00
doodad id=4 widget=1 timestamp=2010-03-05T08:30
widget id=2 timestamp=2010-03-05T10:00:00
doodad id=3 widget=2 timestamp=2010-03-05T09:10
doodad id=5 widget=2 timestamp=2010-03-05T08:30
The server should return something like
doodad id=2 widget=1 timestamp=2010-03-05T09:00
doodad id=4 widget=1 timestamp=2010-03-05T08:30
widget id=2 timestamp=2010-03-05T10:00:00
doodad id=3 widget=2 timestamp=2010-03-05T09:10
doodad id=5 widget=2 timestamp=2010-03-05T08:30
contains only modified rows.
The client would like to tell the server what it has so that the server can send updates. I do not want to make several connections to the server, because the mobile connection is unreliable, and I do not want to risk receiving partial data.
, , GET , , (304 Not Modified) , : "GET/widgets/{id}; timestamp = xxx".
? - "GET/changes", ( doodad), id timestamp , ? , , ( ), ?
,