138 lines
4.5 KiB
Python
138 lines
4.5 KiB
Python
import mf2py
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from annoying.decorators import render_to
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from django.contrib.auth.decorators import login_required
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from django.http import HttpResponseForbidden, HttpResponseBadRequest
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from django.http import JsonResponse
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from django.shortcuts import redirect
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from django.utils.decorators import method_decorator
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from django.views.generic import TemplateView
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from django.views.decorators.csrf import csrf_exempt
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from django.views.decorators.http import require_POST
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from lemoncurry import breadcrumbs, utils
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from urllib.parse import urlencode, urljoin, urlunparse, urlparse
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from ..models import IndieAuthCode
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breadcrumbs.add('lemonauth:indie', label='indieauth', parent='home:index')
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def bad_req(message):
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return HttpResponseBadRequest(message, content_type='text/plain')
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def forbid(message):
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return HttpResponseForbidden(message, content_type='text/plain')
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def canonical(url):
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(scheme, loc, path, params, q, fragment) = urlparse(url)
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if not path:
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path = '/'
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if not loc:
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loc, path = path, ''
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if not scheme:
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scheme = 'https'
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return urlunparse((scheme, loc, path, params, q, fragment))
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@method_decorator(csrf_exempt, name='dispatch')
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class IndieView(TemplateView):
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template_name = 'lemonauth/indie.html'
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required_params = ('me', 'client_id', 'redirect_uri')
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@method_decorator(login_required)
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@method_decorator(render_to(template_name))
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def get(self, request):
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params = request.GET.dict()
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params.setdefault('response_type', 'id')
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for param in self.required_params:
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if param not in params:
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return HttpResponseBadRequest(
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'parameter {0} is required'.format(param),
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content_type='text/plain',
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)
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me = canonical(params['me'])
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user = urljoin(utils.origin(request), request.user.url)
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if user != me:
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return HttpResponseForbidden(
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'you are logged in but not as {0}'.format(me),
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content_type='text/plain',
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)
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type = params['response_type']
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if type not in ('id', 'code'):
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return HttpResponseBadRequest(
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'unknown response_type: {0}'.format(type),
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content_type='text/plain'
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)
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scopes = ()
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if type == 'code':
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if 'scope' not in params:
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return HttpResponseBadRequest(
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'scopes required for code type',
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content_type='text/plain',
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)
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scopes = params['scope'].split(' ')
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client = mf2py.Parser(url=params['client_id'], html_parser='html5lib')
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rels = (client.to_dict()['rel-urls']
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.get(params['redirect_uri'], {})
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.get('rels', ()))
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verified = 'redirect_uri' in rels
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try:
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app = client.to_dict(filter_by_type='h-x-app')[0]['properties']
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except IndexError:
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app = None
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return {
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'app': app,
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'me': me,
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'verified': verified,
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'params': params,
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'scopes': scopes,
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'title': 'indieauth',
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}
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def post(self, request):
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post = request.POST.dict()
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try:
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code = IndieAuthCode.objects.get(code=post.get('code'))
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except IndieAuthCode.DoesNotExist:
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return forbid('invalid auth code')
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# We always delete the code immediately to ensure it's only single-use.
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# If you pass the right code but the wrong other info, bad luck, you
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# need a new code.
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code.delete()
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# After deleting the code from the DB, we verify the other parameters
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# of the request.
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if code.response_type != 'id':
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return bad_req('this endpoint only supports response_type=id')
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if post.get('client_id') != code.client_id:
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return forbid('client id did not match')
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if post.get('redirect_uri') != code.redirect_uri:
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return forbid('redirect uri did not match')
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# If we got here, it's valid! Yay!
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return utils.choose_type(request, {'me': code.me}, {
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'application/json': JsonResponse,
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'application/x-www-form-urlencoded': utils.form_encoded_response,
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})
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@login_required
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@require_POST
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def approve(request):
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code = IndieAuthCode.objects.create_from_qdict(request.POST)
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code.save()
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params = {'code': code.code, 'me': code.me}
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if 'state' in request.POST:
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params['state'] = request.POST['state']
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return redirect(code.redirect_uri + '?' + urlencode(params))
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