Begins an asynchronously request for the URI pointed to by @request.
Note that you cannot use this method with #SoupRequests attached to a #SoupSessionSync.
a #GCancellable or %NULL
a #GAsyncReadyCallback
user data passed to @callback
2.42
See Implementation
Begins an asynchronously request for the URI pointed to by @request.
Note that you cannot use this method with #SoupRequests attached to a #SoupSessionSync.