kopia lustrzana https://github.com/snarfed/bridgy-fed
102 wiersze
3.3 KiB
Python
102 wiersze
3.3 KiB
Python
"""Handles requests for ActivityPub endpoints: actors, inbox, etc.
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"""
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import json
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import logging
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import appengine_config
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from granary import as2, microformats2
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import mf2py
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import mf2util
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from oauth_dropins.webutil import util
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import webapp2
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import common
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from models import MagicKey
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# https://www.w3.org/TR/activitypub/#retrieving-objects
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CONTENT_TYPE_AS2 = 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"'
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CONTENT_TYPE_AS = 'application/activity+json'
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CONNEG_HEADER = {
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'Accept': '%s; q=0.9, %s; q=0.8' % (CONTENT_TYPE_AS2, CONTENT_TYPE_AS),
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}
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SUPPORTED_TYPES = (
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'Announce',
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'Article',
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'Audio',
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'Image',
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'Like',
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'Note',
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'Video',
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)
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class ActorHandler(webapp2.RequestHandler):
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"""Serves /[DOMAIN], fetches its mf2, converts to AS Actor, and serves it."""
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def get(self, domain):
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url = 'http://%s/' % domain
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resp = common.requests_get(url)
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mf2 = mf2py.parse(resp.text, url=resp.url)
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logging.info('Parsed mf2 for %s: %s', resp.url, json.dumps(mf2, indent=2))
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hcard = mf2util.representative_hcard(mf2, resp.url)
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logging.info('Representative h-card: %s', json.dumps(hcard, indent=2))
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if not hcard:
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common.error(self, """\
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Couldn't find a <a href="http://microformats.org/wiki/representative-hcard-parsing">\
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representative h-card</a> on %s""" % resp.url)
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key = MagicKey.get_or_create(domain)
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obj = common.postprocess_as2(as2.from_as1(microformats2.json_to_object(hcard)),
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key=key)
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obj.update({
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'inbox': '%s/%s/inbox' % (appengine_config.HOST_URL, domain),
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})
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logging.info('Returning: %s', json.dumps(obj, indent=2))
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self.response.headers.update({
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'Content-Type': CONTENT_TYPE_AS2,
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'Access-Control-Allow-Origin': '*',
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})
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self.response.write(json.dumps(obj, indent=2))
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class InboxHandler(webapp2.RequestHandler):
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"""Accepts POSTs to /[DOMAIN]/inbox and converts to outbound webmentions."""
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def post(self, domain):
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logging.info('Got: %s', self.request.body)
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# parse and validate AS2 activity
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try:
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activity = json.loads(self.request.body)
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assert activity
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except (TypeError, ValueError, AssertionError) as e:
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common.error(self, "Couldn't parse body as JSON: %s" % e)
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type = activity.get('type')
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if type not in SUPPORTED_TYPES:
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common.error(self, 'Sorry, %s activities are not supported yet.' % type,
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status=501)
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# TODO: verify signature if there is one
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# fetch actor if necessary so we have name, profile photo, etc
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if activity.get('type') in ('Like', 'Announce'):
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actor = activity.get('actor')
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if actor:
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activity['actor'] = common.requests_get(
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actor, parse_json=True, headers=CONNEG_HEADER)
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# send webmentions to each target
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as1 = as2.to_as1(activity)
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common.send_webmentions(self, as1, protocol='activitypub',
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source_as2=json.dumps(activity))
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app = webapp2.WSGIApplication([
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(r'/%s/?' % common.DOMAIN_RE, ActorHandler),
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(r'/%s/inbox' % common.DOMAIN_RE, InboxHandler),
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], debug=appengine_config.DEBUG)
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