Adds a signal handler to this for signal
, as with connect
, but the callback
will only be run if this has the status status_code
.
signal
must be a signal that will be emitted after this's status is set. For a client
Message, this means it can't be a "wrote" signal. For a server
Message, this means it can't be a "got" signal.
this |
a Message |
status_code |
status code to match against |
callback |
the header handler |
signal |
signal to connect the handler to. |
user_data |
data to pass to |
the handler ID from connect |