Half-implement an IndieAuth authorization endpoint - it accepts the right parameters, verifies your client_id, and displays a prompt, but you can't actually approve the auth yet

Pipfile

@@ -22,6 +22,7 @@ qrcode = "*"
 django-otp-agents = "*"
 python-slugify = "*"
 django-markdown-deux = "*"
+"mf2py" = "*"
 
 
 [dev-packages]

Pipfile.lock

@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "c32114b4f91b4ef6f4023a180c8db8c0567a6f9206da1af2136af17dd6026b93"
+            "sha256": "ead57b340efa8b663100364efa6b9037299456bb3e37d533b6d7c4404608749c"
         },
         "host-environment-markers": {
             "implementation_name": "cpython",
@@ -27,6 +27,28 @@
         ]
     },
     "default": {
+        "beautifulsoup4": {
+            "hashes": [
+                "sha256:7015e76bf32f1f574636c4288399a6de66ce08fb7b2457f628a8d70c0fbabb11",
+                "sha256:11a9a27b7d3bddc6d86f59fb76afb70e921a25ac2d6cc55b40d072bd68435a76",
+                "sha256:808b6ac932dccb0a4126558f7dfdcf41710dd44a4ef497a0bb59a77f9f078e89"
+            ],
+            "version": "==4.6.0"
+        },
+        "certifi": {
+            "hashes": [
+                "sha256:54a07c09c586b0e4c619f02a5e94e36619da8e2b053e20f594348c0611803704",
+                "sha256:40523d2efb60523e113b44602298f0960e900388cf3bb6043f645cf57ea9e3f5"
+            ],
+            "version": "==2017.7.27.1"
+        },
+        "chardet": {
+            "hashes": [
+                "sha256:fc323ffcaeaed0e0a02bf4d117757b98aed530d9ed4531e3e15460124c106691",
+                "sha256:84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae"
+            ],
+            "version": "==3.0.4"
+        },
         "django": {
             "hashes": [
                 "sha256:7ab6a9c798a5f9f359ee6da3677211f883fb02ef32cebe9b29751eb7a871febf",
@@ -120,6 +142,20 @@
             ],
             "version": "==19.7.1"
         },
+        "html5lib": {
+            "hashes": [
+                "sha256:b8934484cf22f1db684c0fae27569a0db404d0208d20163fbf51cc537245d008",
+                "sha256:ee747c0ffd3028d2722061936b5c65ee4fe13c8e4613519b4447123fc4546298"
+            ],
+            "version": "==0.999999999"
+        },
+        "idna": {
+            "hashes": [
+                "sha256:8c7309c718f94b3a625cb648ace320157ad16ff131ae0af362c9f21b80ef6ec4",
+                "sha256:2c6a5de3089009e3da7c5dde64a141dbc8551d5b7f6cf4ed7c2568d0cc520a8f"
+            ],
+            "version": "==2.6"
+        },
         "lxml": {
             "hashes": [
                 "sha256:7a8715539adb41c78129983ba69d852e0102a3f51d559eeb91dce1f6290c4ad0",
@@ -159,6 +195,12 @@
             ],
             "version": "==2.3.4"
         },
+        "mf2py": {
+            "hashes": [
+                "sha256:021b675c0732bdbc3b8c153e1ee8e1f476c3d0ffc56a7908f9e9f90147c5fccd"
+            ],
+            "version": "==1.0.5"
+        },
         "olefile": {
             "hashes": [
                 "sha256:61f2ca0cd0aa77279eb943c07f607438edf374096b66332fae1ee64a6f0f73ad"
@@ -300,6 +342,13 @@
             ],
             "version": "==2.10.6"
         },
+        "requests": {
+            "hashes": [
+                "sha256:6a1b267aa90cac58ac3a765d067950e7dbbf75b1da07e895d1f594193a40a38b",
+                "sha256:9c443e7324ba5b85070c4a818ade28bfabedf16ea10206da1132edaa6dda237e"
+            ],
+            "version": "==2.18.4"
+        },
         "rjsmin": {
             "hashes": [
                 "sha256:dd9591aa73500b08b7db24367f8d32c6470021f39d5ab4e50c7c02e4401386f1"
@@ -319,6 +368,20 @@
                 "sha256:280a6ab88e1f2eb5af79edff450021a0d3f0448952847cd79677e55e58bad051"
             ],
             "version": "==0.4.21"
+        },
+        "urllib3": {
+            "hashes": [
+                "sha256:06330f386d6e4b195fbfc736b297f58c5a892e4440e54d294d7004e3a9bbea1b",
+                "sha256:cc44da8e1145637334317feebd728bd869a35285b93cbb4cca2577da7e62db4f"
+            ],
+            "version": "==1.22"
+        },
+        "webencodings": {
+            "hashes": [
+                "sha256:a0af1213f3c2226497a97e2b3aa01a7e4bee4f403f95be16fc9acd2947514a78",
+                "sha256:b36a1c245f2d304965eb4e0a82848379241dc04b865afcc4aab16748587e1923"
+            ],
+            "version": "==0.5.1"
         }
     },
     "develop": {}

lemonauth/templates/lemonauth/indie.html

@@ -0,0 +1,24 @@
+{% extends 'lemoncurry/layout.html' %}
+{% block main %}
+<div class="container">
+	<form class="card" method="post" action="{% url 'lemonauth:indie' %}">
+		<h4 class="card-header">
+			<a href="{{ params.client_id }}">{{ params.client_id }}</a>
+		</h4>
+
+		<div class="card-body">
+			<p class="card-text">do you want to confirm your identity, <a href="{{ params.me }}">{{ params.me }}</a>, with this app?</p>
+		</div>
+
+		<div class="card-footer">
+			<p class="card-text">you can't actually auth yet but this button is how you will do it</p>
+			<button class="btn btn-success" type="button">
+				<i class="fa fa-check"></i>
+				approve
+			</button>
+		</div>
+
+		{% csrf_token %}
+	</form>
+</div>
+{% endblock %}

lemonauth/urls.py

@@ -5,4 +5,5 @@ app_name = 'lemonauth'
 urlpatterns = [
     url('^login$', views.login, name='login'),
     url('^logout$', views.logout, name='logout'),
+    url('^indie$', views.IndieView.as_view(), name='indie'),
 ]

lemonauth/views/__init__.py

@@ -1,2 +1,3 @@
 from .login import login
 from .logout import logout
+from .indie import IndieView

lemonauth/views/indie.py

@@ -0,0 +1,53 @@
+import mf2py
+
+from django.contrib.auth.decorators import login_required
+from django.http import HttpResponseForbidden, HttpResponseBadRequest
+from django.shortcuts import render
+from django.utils.decorators import method_decorator
+from django.views.generic import TemplateView
+from lemoncurry import breadcrumbs
+
+breadcrumbs.add('lemonauth:indie', label='indieauth', parent='home:index')
+
+
+class IndieView(TemplateView):
+    template_name = 'lemonauth/indie.html'
+    required_params = ('me', 'client_id', 'redirect_uri')
+
+    @method_decorator(login_required)
+    def dispatch(self, *args, **kwargs):
+        return super(IndieView, self).dispatch(*args, **kwargs)
+
+    def get(self, request):
+        params = request.GET
+        for param in self.required_params:
+            if param not in params:
+                return HttpResponseBadRequest(
+                    'parameter {0} is required'.format(param),
+                    content_type='text/plain',
+                )
+
+        me = params['me']
+        user = '{0}://{1}{2}'.format(
+            request.scheme,
+            request.META['HTTP_HOST'],
+            request.user.url
+        )
+        if me != user:
+            return HttpResponseForbidden(
+                'you are logged in but not as {0}'.format(me),
+                content_type='text/plain',
+            )
+
+        client = mf2py.parse(url=params['client_id'])
+        rels = client['rel-urls'].get(params['redirect_uri'], {}).get('rels', ())
+        if 'redirect_uri' not in rels:
+            return HttpResponseBadRequest(
+                'your redirect_uri is not published on your client_id page',
+                content_type='text/plain'
+            )
+
+        return render(request, self.template_name, {
+            'params': params,
+            'title': 'indieauth',
+        })

lemoncurry/templates/lemoncurry/layout.html

@@ -11,6 +11,7 @@
 		{% include 'meta/meta.html' %}
 		{% placeFavicon %}
 
+		<link rel="authorization_endpoint" href="{% url 'lemonauth:indie' %}" />
 		<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css"
 					integrity="sha384-PsH8R72JQ3SOdhVi3uxftmaW6Vc51MKb0q5P2rRUpPvrszuE4W1povHYgTpBfshb" crossorigin="anonymous" />
 		{% compress css %}