128 lines
4.2 KiB
Python
128 lines
4.2 KiB
Python
import json
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from asgiref.sync import async_to_sync
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from django.http import Http404, HttpResponse, HttpResponseBadRequest, JsonResponse
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from django.utils.decorators import method_decorator
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from django.views.decorators.csrf import csrf_exempt
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from django.views.generic import View
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from core.ld import canonicalise
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from core.signatures import (
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HttpSignature,
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LDSignature,
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VerificationError,
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VerificationFormatError,
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)
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from users.models import Identity, InboxMessage
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from users.shortcuts import by_handle_or_404
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class HttpResponseUnauthorized(HttpResponse):
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status_code = 401
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class HostMeta(View):
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"""
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Returns a canned host-meta response
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"""
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def get(self, request):
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return HttpResponse(
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"""<?xml version="1.0" encoding="UTF-8"?>
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<XRD xmlns="http://docs.oasis-open.org/ns/xri/xrd-1.0">
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<Link rel="lrdd" template="https://%s/.well-known/webfinger?resource={uri}"/>
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</XRD>"""
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% request.META["HTTP_HOST"],
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content_type="application/xml",
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)
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class Webfinger(View):
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"""
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Services webfinger requests
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"""
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def get(self, request):
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resource = request.GET.get("resource")
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if not resource.startswith("acct:"):
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raise Http404("Not an account resource")
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handle = resource[5:].replace("testfedi", "feditest")
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identity = by_handle_or_404(request, handle)
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return JsonResponse(
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{
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"subject": f"acct:{identity.handle}",
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"aliases": [
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identity.view_url,
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],
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"links": [
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{
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"rel": "http://webfinger.net/rel/profile-page",
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"type": "text/html",
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"href": identity.view_url,
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},
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{
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"rel": "self",
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"type": "application/activity+json",
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"href": identity.actor_uri,
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},
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],
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}
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)
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class Actor(View):
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"""
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Returns the AP Actor object
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"""
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def get(self, request, handle):
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identity = by_handle_or_404(self.request, handle)
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return JsonResponse(canonicalise(identity.to_ap(), include_security=True))
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@method_decorator(csrf_exempt, name="dispatch")
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class Inbox(View):
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"""
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AP Inbox endpoint
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"""
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def post(self, request, handle):
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# Load the LD
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document = canonicalise(json.loads(request.body), include_security=True)
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# Find the Identity by the actor on the incoming item
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# This ensures that the signature used for the headers matches the actor
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# described in the payload.
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identity = Identity.by_actor_uri(document["actor"], create=True)
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if not identity.public_key:
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# See if we can fetch it right now
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async_to_sync(identity.fetch_actor)()
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if not identity.public_key:
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print("Cannot get actor", document["actor"])
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return HttpResponseBadRequest("Cannot retrieve actor")
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# If there's a "signature" payload, verify against that
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if "signature" in document:
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try:
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LDSignature.verify_signature(document, identity.public_key)
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except VerificationFormatError as e:
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print("Bad LD signature format:", e.args[0])
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return HttpResponseBadRequest(e.args[0])
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except VerificationError:
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print("Bad LD signature")
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return HttpResponseUnauthorized("Bad signature")
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# Otherwise, verify against the header (assuming it's the same actor)
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else:
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try:
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HttpSignature.verify_request(
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request,
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identity.public_key,
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)
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except VerificationFormatError as e:
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print("Bad HTTP signature format:", e.args[0])
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return HttpResponseBadRequest(e.args[0])
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except VerificationError:
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print("Bad HTTP signature")
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return HttpResponseUnauthorized("Bad signature")
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# Hand off the item to be processed by the queue
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InboxMessage.objects.create(message=document)
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return HttpResponse(status=202)
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