When we come across a SOAP-based service we must provide or use, our approach is to use a REST-based wrapper. So far we have always been able to find existing solutions. For example, for SAML, there are services that already provide a REST-base wrapper for SAML-based identity providers, such as StormPath, Ping, and Shibboleth. If we didn't find an existing solution for some SOAP service, we would probably write our own REST wrapper in C# or Java and use that. Hope this helps, Yitz On Fri, Sep 16, 2016 at 5:43 PM, Olaf Klinke wrote:

Dear Haskellers,

I am considering implementing the OPC XML DA standard [1] in Haskell. OPC XML DA is based on SOAP and is used for communicating with servers controlling hardware such as power plants. Currently the only open implementation known to me is PyOPC [2], which is based on an outdated Python libraries. However, Python seems not the nicest language for writing code that is devoid of bugs showing at runtime only. The OPC XML DA standard comes with a WSDL document (600 lines). There is a wsdl package on hackage, but it is incomplete. Can anyone share experience in implementing a webservice specified as WSDL? Actually, the client side would be enough for my purposes. That is, compose well-formed messages and parse the responses.

Thanks, Olaf

[1] https://opcfoundation.org/developer-tools/specifications-classic/xml-data-ac... [2] https://libraries.io/pypi/PyOPC _______________________________________________ Haskell-Cafe mailing list To (un)subscribe, modify options or view archives go to: http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe Only members subscribed via the mailman list are allowed to post.