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