Metadata endpoints

This document gives a short introduction to the various methods forms metadata endpoints can take in SimpleSAMLphp.

The endpoints we have are:

Endpoint	Indexed	Default binding
`ArtifactResolutionService`	Y	SOAP
`AssertionConsumerService`	Y	HTTP-POST
`SingleLogoutService`	N	HTTP-Redirect
`SingleSignOnService`	N	HTTP-Redirect

The various endpoints can be specified in the following format:

  'AssertionConsumerService' => [
      [
          'index' => 1,
          'isDefault' => true,
          'Location' => 'https://sp.example.org/ACS',
          'Binding' => 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST',
      ],
      [
          'index' => 2,
          'Location' => 'https://sp.example.org/ACS',
          'Binding' => 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Artifact',
      ],
  ],

This endpoint format allows for specifying multiple endpoints with different bindings. It can also be used to specify the ResponseLocation attribute on endpoints, e.g. on SingleLogoutService :

  'SingleLogoutService' => [
      [
          'Location' => 'https://sp.example.org/LogoutRequest',
          'ResponseLocation' => 'https://sp.example.org/LogoutResponse',
          'Binding' => 'urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect',
      ],
  ],