kopia lustrzana https://gitlab.com/marnanel/chapeau
347 wiersze
11 KiB
Python
347 wiersze
11 KiB
Python
from django_kepi import ATSIGN_CONTEXT, create as kepi_create
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from django_kepi.validation import IncomingMessage
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from django.shortcuts import render, get_object_or_404
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import django.views
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from django.http import HttpResponse, JsonResponse, Http404
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from django.contrib.auth.decorators import login_required
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from django.core.exceptions import ValidationError
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from django.conf import settings
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from django_kepi.models import Thing, ThingField, Following
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from collections.abc import Iterable
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import logging
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import urllib.parse
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import json
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import re
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from collections import defaultdict
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from . import find
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logger = logging.getLogger(name='django_kepi')
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PAGE_LENGTH = 50
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PAGE_FIELD = 'page'
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class KepiView(django.views.View):
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def __init__(self):
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super().__init__()
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self.http_method_names.append('activity')
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def activity(self, request, *args, **kwargs):
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"""
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Returns this view in a form suitable for ActivityPub.
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It may return:
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- a dict, suitable for turning into JSON
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- an iterable, such as a list or QuerySet;
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this will be turned into an OrderedCollection.
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Every member will be passed through
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_modify_list_item before rendering.
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- anything with a property called "activity_form";
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this value should be either an iterable or a dict,
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as above.
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This method is usually called by a KepiView's get() handler.
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By default, its args and kwargs will be passed in unchanged.
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It's also used to retrieve the ActivityPub form within
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the rest of the program, rather than as a response to
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a particular HTTP request. In that case, "request" will
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not be a real HttpRequest. (XXX so, what *will* it be?)
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Override this method in your subclass. In KepiView
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it's abstract.
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"""
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raise NotImplementedError("implement activity() in a subclass")
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def get(self, request, *args, **kwargs):
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"""
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Returns a rendered HttpResult for a GET request.
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By default, KepiViews call self.activity() to get
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the data to render.
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"""
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result = self.activity(request, *args, **kwargs)
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logger.debug('About to render object: %s',
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result)
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while True:
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if isinstance(result, dict):
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logger.debug(' -- it\'s a dict')
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return self._render(result)
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if isinstance(result, Iterable):
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logger.debug(' -- it\'s an iterable')
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return self._collection_get(request, result)
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try:
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result = result.activity_form
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logger.debug(' -- it has an activity_form, %s; recurring',
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result)
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except AttributeError:
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result.warn("I don't know how to render objects like %s.", result)
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raise ValueError("I don't know how to render objects like %s." % (result,))
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def _render(self, data):
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result = JsonResponse(
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data=data,
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json_dumps_params={
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'sort_keys': True,
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'indent': 2,
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}
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)
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result['Content-Type'] = 'application/activity+json'
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return result
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def _collection_get(self, request, items):
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# XXX assert that items.ordered
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our_url = request.build_absolute_uri()
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index_url = self._make_query_page(request, None)
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if PAGE_FIELD in request.GET:
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page_number = int(request.GET[PAGE_FIELD])
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start = (page_number-1) * PAGE_LENGTH
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listed_items = items[start: start+PAGE_LENGTH]
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result = {
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"@context": ATSIGN_CONTEXT,
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"type" : "OrderedCollectionPage",
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"id" : our_url,
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"totalItems" : items.count(),
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"orderedItems" : [self._modify_list_item(x)
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for x in listed_items],
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"partOf": index_url,
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}
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if page_number > 1:
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result["prev"] = self._make_query_page(request, page_number-1)
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if start+PAGE_LENGTH < items.count():
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result["next"] = self._make_query_page(request, page_number+1)
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else:
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# Index page.
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result = {
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"@context": ATSIGN_CONTEXT,
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"type": "OrderedCollection",
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"id": index_url,
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"totalItems" : items.count(),
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}
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if items.exists():
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result["first"] = "{}?page=1".format(our_url,)
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return self._render(result)
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def _make_query_page(
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self,
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request,
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page_number,
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):
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fields = dict(request.GET)
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if page_number is None:
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if PAGE_FIELD in fields:
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del fields[PAGE_FIELD]
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else:
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fields[PAGE_FIELD] = page_number
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encoded = urllib.parse.urlencode(fields)
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if encoded!='':
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encoded = '?'+encoded
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return '{}://{}{}{}'.format(
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request.scheme,
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request.get_host(),
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request.path,
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encoded,
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)
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def _modify_list_item(self, obj):
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return str(obj)
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class ThingObjectView(KepiView):
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def activity(self, request, *args, **kwargs):
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try:
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activity_object = Thing.objects.get(
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uuid=kwargs['id'],
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)
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except Thing.DoesNotExist:
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logger.info('unknown: %s', kwargs['id'])
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return None
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except django.core.exceptions.ValidationError:
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logger.info('invalid: %s', kwargs['id'])
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return None
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result = activity_object.activity_form
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logger.debug('found object: %s', str(result))
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return result
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class FollowingView(KepiView):
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def activity(self, request, *args, **kwargs):
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logger.debug('Finding following of %s:', kwargs['name'])
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person = Thing.objects.get(
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f_type='Person',
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f_name = kwargs['name'],
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)
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logging.debug('Finding followers of %s: %s',
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kwargs['name'], person)
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return Following.objects.filter(follower=person.url)
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class FollowersView(KepiView):
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def activity(self, request, *args, **kwargs):
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logger.debug('Finding followers of %s:', kwargs['name'])
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person = Thing.objects.get(
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f_type='Person',
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f_name=kwargs['name'],
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)
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logging.debug('Finding followers of %s: %s',
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kwargs['name'], person)
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return Following.objects.filter(following=person.url)
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########################################
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class InboxView(django.views.View):
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def post(self, request, name=None, *args, **kwargs):
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# username is None for the shared inbox.
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headers = defaultdict(lambda: '',
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[(f[5:],v) for f,v in request.META.items() if f.startswith("HTTP_")])
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capture = IncomingMessage(
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date = headers['DATE'],
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host = headers[''],
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path = request.path,
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signature = headers['SIGNATURE'],
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body = str(request.body, encoding='UTF-8'),
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)
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capture.save()
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logger.debug('%s: received %s at %s',
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capture,
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str(request.body, encoding='UTF-8'),
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request.path,
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)
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return HttpResponse(
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status = 200,
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reason = 'Thank you',
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content = '',
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content_type = 'text/plain',
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)
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# We need to support GET (as a collection)
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# but we don't yet.
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########################################
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class AsyncResultView(django.views.View):
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def post(self, request, *args, **kwargs):
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uuid_passcode = request.GET['uuid']
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success = int(request.GET['success'])!=0
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if success:
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if not request.body:
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logger.warn('Batch notification had success==1 but no body')
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return django.http.HttpResponseBadRequest()
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body = str(request.body, encoding='UTF-8')
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# Why not use request.POST? Because the batch process might
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# reasonably use Content-Type: application/activity+json,
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# which Django wouldn't recognise as proper JSON, so
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# request.POST wouldn't get populated.
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# XXX we might want to check the Content-Type here
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else:
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if request.POST:
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logger.warn('Batch notification had success==0 but supplied a body')
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return django.http.HttpResponseBadRequest()
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body = None
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try:
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message_need = get_object_or_404(QuarantinedMessageNeeds, id=uuid_passcode)
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except ValidationError as e:
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logger.warn('Invalid UUID supplied: %s', uuid_passcode)
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raise e
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except QuarantinedMessageNeeds.NotFound as e:
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logger.warn('Batch notification for unknown UUID: %s',
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uuid_passcode)
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raise e
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if success:
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logger.info('Batch processing has retrieved %s:',
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message_need.needs_to_fetch)
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logger.debug(' -- its contents are %s', body)
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else:
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logger.info('Batch processing has failed to retrieve %s:',
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message_need.needs_to_fetch)
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if success and body is not None:
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try:
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fields = json.loads(body)
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kepi_create(fields)
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except json.decoder.JSONDecodeError:
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fields = None
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success = False
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logger.warn('Body was not JSON. Treating as failure.')
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if success:
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logger.debug(' -- trying to deploy all matching messages again')
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else:
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logger.debug(' -- deleting all messages which relied on it')
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for need in list(QuarantinedMessageNeeds.objects.filter(
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needs_to_fetch = message_need.needs_to_fetch)):
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message = need.message
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need.delete()
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if success:
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logger.debug(' -- trying to deploy %s', str(need.message))
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message.deploy(retrying=True)
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else:
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logger.debug(' -- deleting %s', str(need.message))
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message.delete()
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logger.debug(' -- finished')
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return HttpResponse(
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status = 200,
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reason = 'All is well',
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content = '',
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content_type = 'text/plain',
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)
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