Asynchronously sends msg and reads the response body.
When callback is called, then either msg has been sent, and its response body read, or else an error has
occurred. This function should only be used when the resource to be retrieved is not too long and can be stored in memory. Call [
[email protected]_and_read_finish] to get a [[email protected]] with the response body.
See [[email protected]] for more details on the general semantics.
| this |
a Session |
| msg |
a Message |
| io_priority |
the I/O priority of the request |
| cancellable |
a Cancellable |
| callback |
the callback to invoke |
| user_data |
data for |