Your application :doc:`requests a resource </requesting-a-resource>`.
This request includes the
url of the
resource you want to retrieve, the
callback URL where you want the resource to be sent when it has been retrieved
and, optionally, a set of
headers to be sent with the retrieval request.
The response you receive includes a json-encoded string. That's the :ref:`request ID <requesting-a-resource-success-request>`. You'll want to make a note of that somewhere.
Your request to retrieve a resource has been put into a queue. The request will probably be handled quite quickly but not instantly. Some time will pass before your request has completed.
… let's wait. Something will happen eventually …
Your request completed and was successful. That's good.
A json-encoded :doc:`response object </callback-responses>` is sent in a
POST request to the
that you specified in your request.