Draft: Resolve "HKP fails if multiple keys match"

Closes #35 (closed)

app/hkp/views.py

@@ -18,11 +18,14 @@ def lookup(request):
     if search.startswith("0x"):
         search = search[2:]
 
-    key = get_object_or_404(models.PublicKey, keyid__endswith=search)
-    if not request.user.has_perm("pgp.view_publickey", key):
+    keys = models.PublicKey.objects.filter(keyid__endswith=search)
+    keys = [key for key in keys
+            if request.user.has_perm("pgp.view_publickey", key)]
+    if not keys:
         raise Http404()
 
-    response = HttpResponse(key.armor, content_type="application/pgp-keys")
+    response = HttpResponse("\n".join(k.armor for k in keys),
+                            content_type="application/pgp-keys")
     response["Access-Control-Allow-Origin"] = "*"
     response["Access-Control-Allow-Methods"] = "GET, OPTIONS, HEAD"
     return response