Can Spring security SAML be used to configure IDPs at Runtime

问题

I'ld like to implement SSO using SAML 2.0 in my web applications. I have seen spring-security-saml and example of spring boot application. There are a couple of things I wanted to know after I went through the sample:

1. Is it possible to take Idp Url and certificates at run time and use spring saml to validate against that Idp? (So essentially I do not want to predefine any of the Idp related details and take an input from admin user to configure Idp)
2. Is metadata of Idp a necessary field or Is it possible that if IDP is not reachable directly from the SP then also it can just create a SAMLRequest to the Idp Url provided?

来源：https://stackoverflow.com/questions/48883432/can-spring-security-saml-be-used-to-configure-idps-at-runtime