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 three different ways:

* A single string.
* Array of strings.
* Array of arrays.

A single string

  'AssertionConsumerService' => 'https://sp.example.org/ACS',

This is the simplest endpoint format. It can be used when there is only a single endpoint that uses the default binding.

Array of strings

  'AssertionConsumerService' => [
      'https://site1.example.org/ACS',
      'https://site2.example.org/ACS',
  ],

This endpoint format can be used to represent multiple endpoints, all of which use the default binding.

Array of arrays

  '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',
      ],
  ],