class type virtual v_extended_environment =An extension of
cgi_environmentfor use with the daemon. The methods retrieving the socket addresses are virtual.
cgi_propertiesas the one sent to the
method input_channel :
This method may return immediately when it is possible to open the file, and
to set the kernel up for file transmission. Otherwise a
raised. It is also allowed that this method blocks until the file is actually
It is not allowed to print to the output channel and to call
Only one transmission method must be invoked.
method virtual output_state :
`Start: Nothing is generated yet
`Sending: Output is already being sent
`End: The response (for a single request) has been fully sent