为什么“&SAMLRequest”会附加到我的ADFS入口点URL?

我使用adfs IDP和saml sso使用passport-saml。

我的切入点如下:

https://<domain-name>/adfs/ls/IdpInitiatedSignon.aspx?loginToRp=https://<domain-name>/saml/metadata 

当我给这个URL时,adfs ssologin页面加载正常,但是当我运行应用程序时, &SAMLRequest被附加了这个URL:

 https://<domain-name>/adfs/ls/IdpInitiatedSignon.aspx?loginToRp=https%3A%2F%2F<domain-name>%2Fsaml%2Fmetadata&SAMLRequest=nVNBbtswEPyKwLskS0lQh7BsODaKGkhbw1Z76CVgyJVDgCJV7ipxfl9KtgIfGh18IrA7HM7OLGeLY22iV%2FConS1YlkzYYj5DUZuGL1t6sTv42wJSFGAWed8oWOstdwI1citqQE6S75ffH3meTHjjHTnpDIs264I93cL09uY5z%2FPptMrvIBdimrHo9%2FBguBGAiC1sLJKwFEqT7EucZXGWl%2FmE5xm%2FuUvus%2Fs%2FLNqeqR%2B0VdoexnU8n0DIv5XlNt7%2B3JcsWiKCp%2FDwyllsa%2FB78K9awq%2FdY8FeiBrkaao7IdK4VlXaACbS1SxaBw%2B0FdSLHkGmQlWYGkw3qtlYTVoQqL0%2BWGcTgc1xYdxB29LtmmKMpfM5rYGEEiTYKRDe2%2BQvkhg3QAzDsrlxUpgYjo0HxBgsaXqPtZqlF7xD6j8C0Wa9dUbL92tS%2F%2Bp8LehzdJZkfUWruOqhHGqhzVKpTlzIyBj3tvIQjCsY%2BRZYOkg77yKofjNDhgTHqzZz5epGeI1dmHAUkgaLL4lXJji4g%2Boaw0dhksuOOpS34XhzXnWLDTIMVnphsXGeztH8T8%2F81PvEjo%2Fu5e%2Bd%2FwM%3D&SigAlg=http%3A%2F%2Fwww.w3.org%2F2000%2F09%2Fxmldsig%23rsa-sha1&Signature=EdEYkblB2aOEWvoeMtmWVOkeePocMAeRu2gGBRWrjyQvx%2BEP8eekHSb4IQwodJIui%2BXw%2F%2B0ziKD%2FmwFgaIlFhmWa3ZXpiluzhG8OjK2CaH1trnXNrZM3L%2FYANlXwVl2Z4WF4GF8EP7tmIci8XxFrdP%2Fz3EZ2rlCRdELJV%2FK9wNUUiMFF6FLdExcvZieb5ug15I9wynZndhzAZL46f3cjPvMpsJ9oekR8OKIejXmYOevW0OMq%2BbGGipHKE6B1WwTSaPWGrhdEYPSTHvKpmWrz%2F%2FDscCdF9zLqv%2FGY7TgMhTg9FtlfeQ2jnqeaABBilgYaF4B5zLfCGKk5BmxqwzazGg%3D%3D 

&符号导致页面加载错误,但是当我用其他符号replace这个符号时,页面加载正常。 为什么是这样的,我该如何解决?

错误的屏幕截图

它看起来像是一个GET与一个POST的请求。

loginToRp应该是应用程序的名称,但您已将其设置为元数据?

重点是避免要求用户select一个应用程序,因为你已经指定了它。