Feature/webfinger (1 / X Pull requests for Activitypub support)

weasyl/controllers/routes.py

@@ -17,7 +17,7 @@
     settings,
     two_factor_auth,
     user,
-    weasyl_collections,
+    weasyl_collections, well_known,
 )
 from weasyl import oauth2
 
@@ -346,6 +346,10 @@
 
     # Routes for static event pages, such as holidays.
     Route("/events/halloweasyl2014", "events_halloweasyl2014", events.halloweasyl2014_),
+
+    # Routes for activitypub
+    Route("/.well-known/webfinger", "well_known_webfinger", well_known.webfinger),
+    # handled in "profile_" Route("/users/{username}", "activity_pub_user_profile", activitypub.webfinger),
 )
 
 

weasyl/controllers/well_known.py

@@ -0,0 +1,68 @@
+import json
+
+from pyramid.response import Response
+
+from libweasyl.exceptions import WeasylError
+from weasyl import define, profile
+
+
+def webfinger(request):
+    """Handle WebFinger requests."""
+    resource = request.params.get('resource')
+    if not resource or not resource.startswith('acct:'):
+        raise WeasylError("Invalid resource parameter")
+
+    if resource.count("@") > 2 or resource.count("@") < 1:
+        raise WeasylError("Invalid resource parameter")
+    elif resource.count("@") == 2:
+        username = resource.split('@')[1].replace('acct:', '')
+    else:
+        username = resource.split('@')[0].replace('acct:', '')
+    define.append_to_log("well_known.webfinger", username=username)
+    username = request.matchdict.get('name', username)
+    userid = define.get_int(request.params.get('userid'))
+    url = define.absolutify_url("")
+    domain = url.replace("http://", "").replace("https://", "")
+    user = profile.resolve(request.userid, userid, username)
+    # we could also support submissions/journals/collections/characters individually as actors in the future
+    userprofile = profile.select_profile(user, viewer=request.userid)
+    avatar_url = define.absolutify_url(userprofile['user_media']['avatar'][0]['display_url'])
+    if not user:
+        raise WeasylError("User not found")
+
+    response = {
+        "subject": f"acct:{username}@{domain}",
+        "aliases": [
+            f"{url}/user/{username}",
+            f"{url}/profile/{username}",
+            f"{url}/~{username}"
+        ],
+        "links": [
+            {
+                "rel": "self",
+                "type": "application/activity+json",
+                "href": f"{url}/user/{username}"
+            },
+            {
+                "rel": "http://webfinger.net/rel/profile-page",
+                "type": "text/html",
+                "href": f"{url}/~{username}",
+                "properties": {
+                    "https://www.w3.org/ns/activitystreams#type": "Person"
+                }
+            },
+            # unsupported, but would be cool?
+            # {
+            #     "rel": "http://schemas.google.com/g/2010#updates-from",
+            #     "type": "application/atom+xml",
+            #     "href": f"{url}/user/{username}.atom"
+            # },
+            {
+                "rel": "http://webfinger.net/rel/avatar",
+                "type": "image/png",
+                "href": f"{avatar_url}"
+            }
+        ]
+    }
+
+    return Response(json.dumps(response), content_type="application/json", charset="utf-8")