[Additional Feature] SLO views (Single Logout)

[peppelinux]

We should be able to expose a correct web resource for managing Single Logout requests, in HTTP-POST (SOAP), from SP.

Actually we have only these

    path('sso/post', views.sso_entry, name="saml_login_post"),
    path('sso/redirect', views.sso_entry, name="saml_login_redirect"),
    path('sso/init', views.SSOInitView.as_view(), name="saml_idp_init"),
    path('login/process/', views.LoginProcessView.as_view(), name='saml_login_process'),
    path('login/process_multi_factor/', views.ProcessMultiFactorView.as_view(), name='saml_multi_factor'),
    path('metadata/', views.metadata, name='saml2_idp_metadata'),
]

Could we develop also the following, I apologize that I still have to read some more source code from pysaml2 example folder to get this more defined here.

    path('slo/post', views.sso_entry, name="saml_slo_post"),
    path('slo/init', views.SLOInitView.as_view(), name="saml_slo_init"),

Any ideas or suggestions?

[peppelinux]

Implemented and tested in SLO branch:
https://github.com/peppelinux/djangosaml2idp/tree/SLO

[peppelinux]

I'm pushing PR to @askvortson1 repository for faster opinions and coordination, this feature was pushed in a separate branch. In It i coded lazy gettext and a general refactor - not invasive - of the previous code. I Hope to do it Better in the future.

merged into master, PR to @askvortson1 master branch is here:
askvortsov1#2

[mhindery]

SLO is available in the package v0.6.0.