SAML Post Request Problem

Help / Discuss
1

I’m currently trying to authenticate users with SAML using the GitHub - xwiki-contrib/authenticator-saml: XWiki authentication using SAML plugin

After some work xwiki now correctly redirects any users trying to login to the SAML SSO, but by the SAML standard the response is a signed POST message.

But this only leads me to an error:

HTTP ERROR 405

Problem accessing /. Reason:
HTTP method POST is not supported by this URL
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The plugin expects the SAMLResponse to be accesible via the XWikiRequest in the XWikiContext.

Can I somehow alter XWiki to accept this POST message and write it into the context?
Or is there another way to get this message into the context?
I tried writing the SAMLResponse as a parameter into the URL, but it didn’t show up in the XWikiRequest

2

Just in case anyone else is looking for this:
After some more trying I found that i need to redirect back to http://localhost:8080/xwiki/bin/view/Main/ did not result in this error and the context is correctly filled.