Shibboleth SSO server adds "=" after query string

[Peter Schober]

* Cantor, Scott <cantor.2 at osu.edu> [2018-01-08 16:55]:
> > There is no "=" character in the url that is sent to the Shib server.  I have
> > listed the complete http request/reponse that is taking place to avoid any
> > confusion in understanding the issue. Please take some time to go through
> > these transactions as we really feel that this is an issue that needs to be
> > analyzed at shibboleth server. Thanks a ton in advance for taking out time in
> > going through these huge http requests
> 
> Where is there a single Shibboleth SP or IdP involved in this entire
> sequence? Maybe I missed it, but I don't see one.

Indeed the OP is probably just posting to the wrong list:

"/sso/module.php/casserver" at the begin of the REQUEST_URI points to
SimpleSAMLphp (and its "casserver" module) as the software being used
(whether the hostname starts with "shib" or not).

@Virajitha: Try the SimleSAMLphp users list, cf.
https://simplesamlphp.org/lists

-peter