如果未配置IDP服务器，Web应用程序将无法启动

Question

我有一个现有的Web应用程序，我正在其中尝试使用Spring SAML扩展名实现SAML身份验证，但是有很多问题，但是第一个是

->在没有IDP服务器的情况下如何启动Web应用程序，因此在我的场景中，我从用户那里获取IDP的HTTP元数据URL并将其存储在数据库中，因此最初在应用程序首次加载时，不会有任何IDP服务器，因此初始化本身会失败，并显示以下错误，

[org.opensaml.saml2.metadata.provider.MetadataProviderException: No IDP was configured, please update included metadata with at least one IDP] with root cause
 org.opensaml.saml2.metadata.provider.MetadataProviderException: No IDP was configured, please update included metadata with at least one IDP
    at org.springframework.security.saml.metadata.MetadataManager.getDefaultIDP(MetadataManager.java:795)
    at org.springframework.security.saml.context.SAMLContextProviderImpl.populatePeerEntityId(SAMLContextProviderImpl.java:157)
    at org.springframework.security.saml.context.SAMLContextProviderImpl.getLocalAndPeerEntity(SAMLContextProviderImpl.java:127)
    at org.springframework.security.saml.SAMLEntryPoint.commence(SAMLEntryPoint.java:146)
    at org.springframework.security.web.access.ExceptionTranslationFilter.sendStartAuthentication(ExceptionTranslationFilter.java:203)
    at org.springframework.security.web.access.ExceptionTranslationFilter.handleSpringSecurityException(ExceptionTranslationFilter.java:177)
    at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:133)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
    at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
    at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
    at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
    at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
    at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:208)
    at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:185)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)
    at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilterInternal(BasicAuthenticationFilter.java:158)