60 lines
2.3 KiB

from django.http import HttpResponseBadRequest, HttpResponseRedirect
from urllib.parse import urlencode, urlparse
from users.models import User
AVATAR = "http://webfinger.net/rel/avatar"
PROFILE_PAGE = "http://webfinger.net/rel/profile-page"
BRIDGY_FED = "https://fed.brid.gy/.well-known/webfinger"
def https_resource_matching(resource):
Takes a `urllib.parse.urlparse` tuple representing a WebFinger resource and
translates ``mailto:`` and ``xmpp:`` resources to an equivalent ``https:``
resource, if a user with matching email or XMPP address exists locally.
Will throw `User.DoesNotExist` if no such user exists.
if resource.scheme == "mailto":
query = {"email": resource.path}
query = {"xmpp": resource.path}
return User.objects.get(**query).absolute_url
def webfinger(request):
A thin wrapper around Bridgy Fed's implementation of WebFinger.
In most cases, this view simply redirects to the same endpoint at Bridgy.
However, Bridgy does not support the ``mailto:`` and ``xmpp:`` resource
schemes - quite reasonably, since there's no possible way to discover the
``acct:`` they go with! - so resources with those schemes are translated
locally into an ``https:`` URL representing the same person, and *then*
redirected to Bridgy.
Additionally, WebFinger requests with a missing or malformed resource will
be rejected immediately rather than passed on to Bridgy.
Note that the translation step will only be applied if there exists a
:model:`users.User` with matching email or XMPP address. Otherwise, the
original resource will be preserved in the redirect - and likely fail to
find anything at Bridgy's end either.
if "resource" not in request.GET:
return HttpResponseBadRequest("resource parameter missing")
resource = request.GET["resource"]
res = urlparse(resource)
except ValueError:
return HttpResponseBadRequest("resource parameter malformed")
if res.scheme in ("mailto", "xmpp"):
resource = https_resource_matching(res)
except User.DoesNotExist:
query = urlencode({"resource": resource})
return HttpResponseRedirect(BRIDGY_FED + "?" + query)