kopia lustrzana https://github.com/snarfed/bridgy-fed
73 wiersze
2.3 KiB
Python
73 wiersze
2.3 KiB
Python
"""Simple endpoint that redirects to the embedded fully qualified URL.
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May also instead fetch and convert to AS2, depending on conneg.
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Used to wrap ActivityPub ids with the fed.brid.gy domain so that Mastodon
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accepts them. Background:
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https://github.com/snarfed/bridgy-fed/issues/16#issuecomment-424799599
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https://github.com/tootsuite/mastodon/pull/6219#issuecomment-429142747
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"""
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import datetime
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import logging
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from granary import as2, microformats2
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import mf2util
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from oauth_dropins.webutil import util
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from oauth_dropins.webutil.handlers import cache_response
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from oauth_dropins.webutil.util import json_dumps
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import ujson as json
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import webapp2
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import common
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CACHE_TIME = datetime.timedelta(seconds=15)
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class RedirectHandler(common.Handler):
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"""301 redirects to the embedded fully qualified URL.
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e.g. redirects /r/https://foo.com/bar?baz to https://foo.com/bar?baz
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"""
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@cache_response(CACHE_TIME)
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def get(self):
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assert self.request.path_qs.startswith('/r/')
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to = self.request.path_qs[3:]
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if not to.startswith('http://') and not to.startswith('https://'):
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self.error('Expected fully qualified URL; got %s' % to)
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# poor man's conneg, only handle single Accept values, not multiple with
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# priorities.
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if self.request.headers.get('Accept') in (common.CONTENT_TYPE_AS2,
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common.CONTENT_TYPE_AS2_LD):
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return self.convert_to_as2(to)
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# redirect
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logging.info('redirecting to %s', to)
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self.redirect(to)
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def convert_to_as2(self, url):
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"""Fetch a URL as HTML, convert it to AS2, and return it.
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Currently mainly for Pixelfed.
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https://github.com/snarfed/bridgy-fed/issues/39
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"""
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mf2 = util.fetch_mf2(url)
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entry = mf2util.find_first_entry(mf2, ['h-entry'])
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logging.info('Parsed mf2 for %s: %s', mf2['url'], json_dumps(entry, indent=2))
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obj = self.postprocess_as2(as2.from_as1(microformats2.json_to_object(entry)))
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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': common.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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ROUTES = [
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(r'/r/.+', RedirectHandler),
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]
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