The SendResponse method is used to respond to a
command issued by the client from within an OnCommand event
handler. Command responses are normally handled by the server as a
normal part of processing a command and this method is only used if
the application has implemented custom commands or wishes to modify
the standard responses sent by the server.
Result codes must be three digits (in the range of 100 through 999)
and although this method will support the use of non-standard result
codes, it is recommended that the client application use the standard
codes defined in RFC 2616 whenever possible. The use of non-standard
result codes may cause problems with HTTP clients that expect specific
result codes in response to a particular command.
If you do not wish to return any data to the client in response to
its request (for example, if you want the response to only consist of
the headers set using the SetHeader method), then you can omit
the Buffer and Length parameter, and should specify a
result code of 204. This tells the client that the request was
successful and there is no data included with the response.
This method should only be called once in response to a command
sent by the client. If a result code has already been sent in response
to a command and this method is called, it will fail and return an
error. This is necessary because sending multiple result codes
in response to a single command may cause unpredictable behavior by