Asynchronously retrieves the resource at the given URL.
Asynchronously retrieves the resource at the given URL.
Once the resource is retrieved, the resulting IVar
gets a string event with
the resource contents.
In the case of failure, the event stream raises an exception and unreacts.
the url to load the resource from
the name of the charset to use
a single-assignment variable with the resource string
Contains common network protocol services.