kopia lustrzana https://github.com/snarfed/bridgy-fed
87 wiersze
3.1 KiB
Python
87 wiersze
3.1 KiB
Python
"""Handles requests for Salmon endpoints: actors, inbox, etc.
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https://github.com/salmon-protocol/salmon-protocol/blob/master/draft-panzer-salmon-00.html
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https://github.com/salmon-protocol/salmon-protocol/blob/master/draft-panzer-magicsig-01.html
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"""
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import json
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import logging
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from xml.etree import ElementTree
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import appengine_config
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from django_salmon import magicsigs, utils
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import webapp2
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from webmentiontools import send
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import common
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# from django_salmon.feeds
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ATOM_NS = 'http://www.w3.org/2005/Atom'
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ATOM_THREADING_NS = 'http://purl.org/syndication/thread/1.0'
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class SlapHandler(webapp2.RequestHandler):
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"""Accepts POSTs to /[DOMAIN]/salmon and converts to outbound webmentions."""
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# TODO: unify with activitypub
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def post(self, domain):
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logging.info('Got: %s', self.request.body)
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parsed = utils.parse_magic_envelope(self.request.body)
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data = utils.decode(parsed['data'])
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logging.info('Decoded: %s', data)
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# verify signature
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author = utils.parse_author_uri_from_atom(data)
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if ':' not in author:
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author = 'acct:%s' % author
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elif not author.startswith('acct:'):
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common.error(self, 'Author URI %s has unsupported scheme; expected acct:' % author)
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logging.info('Fetching Salmon key for %s' % author)
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if not magicsigs.verify(data, parsed['sig'], author_uri=author):
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common.error(self, 'Could not verify magic signature.')
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logging.info('Verified magic signature.')
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# Mastodon doesn't do this! so screw it.
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# # verify that the timestamp is recent (required by spec)
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# updated = utils.parse_updated_from_atom(data)
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# if not utils.verify_timestamp(updated):
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# common.error(self, 'Timestamp is more than 1h old.')
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# find webmention source and target
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source = None
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targets = []
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for elem in ElementTree.fromstring(data):
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if elem.tag == utils.normalize('link', ATOM_NS):
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source = elem.attrib.get('href').strip()
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elif elem.tag == utils.normalize('in-reply-to', ATOM_THREADING_NS):
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target = elem.attrib.get('ref') or elem.text
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if target and target not in targets:
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targets.append(target.strip())
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if not source:
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common.error(self, "Couldn't find post URL (link element)")
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if not targets:
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self.error("Couldn't find target URL (thr:in-reply-to or TODO)")
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# send webmentions!
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errors = []
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for target in targets:
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logging.info('Sending webmention from %s to %s', source, target)
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wm = send.WebmentionSend(source, target)
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if wm.send(headers=common.HEADERS):
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logging.info('Success: %s', wm.response)
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else:
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logging.warning('Failed: %s', wm.error)
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errors.append(wm.error)
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if errors:
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self.abort(errors[0].get('http_status') or 400,
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'Errors:\n' + '\n'.join(json.dumps(e, indent=2) for e in errors))
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app = webapp2.WSGIApplication([
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(r'/(?:acct:)?@%s/salmon' % common.DOMAIN_RE, SlapHandler),
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], debug=appengine_config.DEBUG)
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