[mod_python] Persistent web-service

On 16/09/2005, at 3:24 AM, Zsolt Barat wrote:

> Graham Dumpleton wrote:
>
>> Still using a separate backend service process or framework is still
>> probably preferable, with the handlers using XML-RPC or some other
>> messaging system mechanism to communicate with it. You still have the
>> issue of having to ensure the backend service is started, but then it
>> also means your backend service isn't really dependent on Apache and
>> you could use other means to communicate with it. Ie., Apache just
>> becomes one type of interface.
>>
> hi,
> this is interesting. i just try to make something like this. a tiny
> webapplication which connects to a serial port and issues some
> datarequest. are they already some recommended frameworks (xml-rpc) you
> aware of which deal with this issue? sample apps?

Depends on your requirements and how complicated you need to make your
server. Simplest means of making a standalone XML-RPC server is with the
SimpleXMLRPCServer module supplied with Python. This may though not be
adequate for an event driven system which needs to deal with a serial
port as well as handle XML-RPC requests.

A more complicated system which you might look at is Twisted. See:

   http://twistedmatrix.com/

It has all manner of stuff for building event driven systems and also
has components for handling XML-RPC requests which can be used to drive
and control other parts of the system.

Graham