[OpenSPP-project] First pass at gSOAP client for OpenSPP server

[Dean W. <dea...@so...>]

In the interest of experimentation, I tried whacking together a very
minimal client to do a GetDestGrps transaction, in C++ using gSOAP.

I had no difficulties using the gSOAP tools with the WSDL and XSD  files
to generate stubs.

I'll confess I'm not a great C++ coder. I think I last wrote commercial
code in C++ in 1995, and that was before STL. It might have even been
before templates ... so my code is a "brute force" experiment. Even the
target string and URI are hard-coded for now.

I am able to use the code to query for an existing destination group and
retrieve cTime and mTime along with appropriate status codes. I haven't
been able to retrieve the rant from the API.

This may well be just weak C++ theory on my part.

But the problem I'm having seems to be related to inheritance in the
schema.

It looks like our schema was designed to be able to return multiple
record types in the same response. Each response record has a SoapType
field that tells us what it really is. That, however, causes problems in
gSOAP, as different records types have different sizes (making vectors
work funny), and one has to jump through a couple of hoops to type-check
and recast pointers at run-time.

The spppQueryRequest produced by gSOAP returns a vector of BasicObjType.
So, iteration across it is type-safed to the BasicObjType. But the rant
is in the DestGrpType derived from BasicObjType, forcing one to cast the
iterator to get the compiler to allow assignment. What I'm doing here
compiles, but I get a null rant out of it (for a query that works with
SoapUI).

Anyhow, here's the code, if you want to play with it. The makefile
presumes the mysoap.cpp file, the wsdl, and the xsd are all in the same
directory.

-- 
Dean Willis