Refactor API

Refactor the API to fully use Django-Rest-Framework features and fully expose the backend through a (nearly) RESTful API.

See https://gitlab.federez.net/federez/re2o/wikis/API/Raw-Usage for usage

To-do tasks:

• Write authentication
  • Authentication by cookie session
  • Authentication by token
  • Use expiring tokens
  • See if DRF-JWT is ok to use instead of django-authtoken (
• Write permission
  • Add a "see and use API" permission
  • Use standard ACL in addition for model-based endpoints
  • Add a way to easily specify custom ACL-based permission (in case no model is available)
• Write endpoints
  • Expose the models data in read-only
  • Expose preferences data
  • Expose data for the service regen and marking service regen done
  • Expose specific endpoint for DNS
  • Expose specific endpoint for DHCP
  • Expose specific endpoint for Mailing
  • Expose missing models (that were added recently)
• Documentation
  • Document the usage (auth, permissions, api client, ...)
  • Document the endpoints
  • Properly comment the code
  • Complete Changelog
• Clean up tests
  • Write tests to check authentication behavior
  • Write tests to check permission behavior
  • Write basic tests to check HTTP status code on every endpoint
  • Write tests that creates simple objects and check if they are really exposed via the API (need test DB and LDAP)

Fix #128 (closed)