1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
import json
from asgiref.sync import async_to_sync
from django.conf import settings
from django.http import HttpResponse, HttpResponseBadRequest, JsonResponse
from django.utils.decorators import method_decorator
from django.views.decorators.csrf import csrf_exempt
from django.views.generic import View
from activities.models import Post
from core import exceptions
from core.decorators import cache_page
from core.ld import canonicalise
from core.models import Config
from core.signatures import (
HttpSignature,
LDSignature,
VerificationError,
VerificationFormatError,
)
from takahe import __version__
from users.models import Identity, InboxMessage, SystemActor
from users.shortcuts import by_handle_or_404
class HttpResponseUnauthorized(HttpResponse):
status_code = 401
class HostMeta(View):
"""
Returns a canned host-meta response
"""
def get(self, request):
return HttpResponse(
"""<?xml version="1.0" encoding="UTF-8"?>
<XRD xmlns="http://docs.oasis-open.org/ns/xri/xrd-1.0">
<Link rel="lrdd" template="https://%s/.well-known/webfinger?resource={uri}"/>
</XRD>"""
% request.headers["host"],
content_type="application/xml",
)
class NodeInfo(View):
"""
Returns the well-known nodeinfo response, pointing to the 2.0 one
"""
def get(self, request):
host = request.META.get("HOST", settings.MAIN_DOMAIN)
return JsonResponse(
{
"links": [
{
"rel": "http://nodeinfo.diaspora.software/ns/schema/2.0",
"href": f"https://{host}/nodeinfo/2.0/",
}
]
}
)
@method_decorator(cache_page(), name="dispatch")
class NodeInfo2(View):
"""
Returns the nodeinfo 2.0 response
"""
def get(self, request):
# Fetch some user stats
local_identities = Identity.objects.filter(local=True).count()
local_posts = Post.objects.filter(local=True).count()
return JsonResponse(
{
"version": "2.0",
"software": {"name": "takahe", "version": __version__},
"protocols": ["activitypub"],
"services": {"outbound": [], "inbound": []},
"usage": {
"users": {"total": local_identities},
"localPosts": local_posts,
},
"openRegistrations": Config.system.signup_allowed
and not Config.system.signup_invite_only,
"metadata": {},
}
)
@method_decorator(cache_page(), name="dispatch")
class Webfinger(View):
"""
Services webfinger requests
"""
def get(self, request):
resource = request.GET.get("resource")
if not resource:
return HttpResponseBadRequest("No resource specified")
if not resource.startswith("acct:"):
return HttpResponseBadRequest("Not an account resource")
handle = resource[5:]
if handle.startswith("__system__@"):
# They are trying to webfinger the system actor
actor = SystemActor()
else:
actor = by_handle_or_404(request, handle)
handle = actor.handle
return JsonResponse(
{
"subject": f"acct:{handle}",
"aliases": [
actor.absolute_profile_uri(),
],
"links": [
{
"rel": "http://webfinger.net/rel/profile-page",
"type": "text/html",
"href": actor.absolute_profile_uri(),
},
{
"rel": "self",
"type": "application/activity+json",
"href": actor.actor_uri,
},
],
}
)
@method_decorator(csrf_exempt, name="dispatch")
class Inbox(View):
"""
AP Inbox endpoint
"""
def post(self, request, handle=None):
# Load the LD
document = canonicalise(json.loads(request.body), include_security=True)
# Find the Identity by the actor on the incoming item
# This ensures that the signature used for the headers matches the actor
# described in the payload.
identity = Identity.by_actor_uri(document["actor"], create=True, transient=True)
if (
document["type"] == "Delete"
and document["actor"] == document["object"]
and not identity.pk
):
# We don't have an Identity record for the user. No-op
exceptions.capture_message(
f"Inbox: Discarded delete message for unknown actor {document['actor']}"
)
return HttpResponse(status=202)
if not identity.public_key:
# See if we can fetch it right now
async_to_sync(identity.fetch_actor)()
if not identity.public_key:
exceptions.capture_message(
f"Inbox error: cannot fetch actor {document['actor']}"
)
return HttpResponseBadRequest("Cannot retrieve actor")
# See if it's from a blocked domain
if identity.domain.blocked:
# I love to lie! Throw it away!
exceptions.capture_message(
f"Inbox: Discarded message from {identity.domain}"
)
return HttpResponse(status=202)
# If there's a "signature" payload, verify against that
if "signature" in document:
try:
LDSignature.verify_signature(document, identity.public_key)
except VerificationFormatError as e:
exceptions.capture_message(
f"Inbox error: Bad LD signature format: {e.args[0]}"
)
return HttpResponseBadRequest(e.args[0])
except VerificationError:
exceptions.capture_message("Inbox error: Bad LD signature")
return HttpResponseUnauthorized("Bad signature")
# Otherwise, verify against the header (assuming it's the same actor)
else:
try:
HttpSignature.verify_request(
request,
identity.public_key,
)
except VerificationFormatError as e:
exceptions.capture_message(
f"Inbox error: Bad HTTP signature format: {e.args[0]}"
)
return HttpResponseBadRequest(e.args[0])
except VerificationError:
exceptions.capture_message("Inbox error: Bad HTTP signature")
return HttpResponseUnauthorized("Bad signature")
# Hand off the item to be processed by the queue
InboxMessage.objects.create(message=document)
return HttpResponse(status=202)
@method_decorator(cache_page(), name="dispatch")
class SystemActorView(View):
"""
Special endpoint for the overall system actor
"""
def get(self, request):
return JsonResponse(
canonicalise(
SystemActor().to_ap(),
include_security=True,
)
)
|
