On Thu, 21 Sep 2006 20:18:52 +0000 (UTC), Yoheeb wrote:

Hi all,

I have never used twisted, but really would like to. I am in the middle of rough design of an xmlrpc OR OTHER remote method invocation type system. I am debating the use of xmlrpc vs the use of perspective broker. (for a quick prototype I will likely use the python base xmlrpc lib, but just for proof of concept)

I need to support both java and python. (and really c/c++ in some fashion would be nice also) from both "local" and remote sources.

I really need something that is secure as well, although I can work around security with either via pre-post process encrytption techniques as needed.

I will need the ability to expose/hide methods based on the user privledges. I envision a single "services" like tool that populates a list of things you can run based on user rights. For this I need usernames/pwds to somehow be secure (md5, rot13, whatever, just something)

I will have connections over vpn, local code calls, and eventually over local serial and usb ports. (assuming everthing looks like a simple IP socket stream)

Finally, I have somehting else running a simple xmlrpc server on the system, and may want to propogate calls to that with some magic wrapper function. (to be specific, I am running a copy of eXist, the xmldb)

Breathe....

Ok, so with all those rough requirements in mind, will PB be worthwhile? There is no preference from the client applications point of view.

Right now I am doing a proof of concept, and have a ton of issues that could be neatly solved by a nice RMI system that is secure.

All of this sounds doable, either with PB or with XML-RPC. Certain parts will be easier with PB, like permissions (since PB gives you remote objects which can represent the capabilities available to a particular user - with XML-RPC you don't have remote objects, but you can cobble together something equivalent, it'll just be either slightly messier or slightly harder). Other parts will be easier with XML-RPC, like accessing the system from a C or C++ application, since there are numerous XML-RPC implementations for those languages, and as far as I know no complete PB implementation for either. A third choice to consider may be AMP, which would be easy to implement in C or C++ (and someone else may have done it by the time you actually get around to that part of your project), although it also does not provide a remote object system natively. Jean-Paul