kopia lustrzana https://github.com/snarfed/bridgy-fed
65 wiersze
2.2 KiB
Python
65 wiersze
2.2 KiB
Python
"""Renders mf2 proxy pages based on stored Object entities."""
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import datetime
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import logging
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from urllib.parse import urlencode
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from flask import redirect, request
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from granary import as1, as2, atom, microformats2
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from oauth_dropins.webutil import flask_util
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from oauth_dropins.webutil.flask_util import error
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from oauth_dropins.webutil import util
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import activitypub
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from flask_app import app, cache
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import common
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from models import Object
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logger = logging.getLogger(__name__)
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@app.get('/render')
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@flask_util.cached(cache, common.CACHE_TIME)
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def render():
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"""Fetches a stored Object and renders it as HTML."""
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id = flask_util.get_required_param('id')
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obj = Object.get_by_id(id)
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if not obj:
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error(f'No stored object for {id}', status=404)
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elif not obj.as1:
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error(f'Stored object for {id} has no AS1', status=404)
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# redirect creates, updates, etc to inner object
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type = as1.object_type(obj.as1)
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if type in ('post', 'update', 'delete'):
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obj_id = as1.get_object(obj.as1).get('id')
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if obj_id:
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obj_obj = Object.get_by_id(obj_id)
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if (obj_obj and obj_obj.as1 and
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not obj_obj.as1.keys() <= set(['id', 'url', 'objectType'])):
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logger.info(f'{type} activity, redirecting to Object {obj_id}')
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return redirect('/render?' + urlencode({'id': obj_id}), code=301)
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if obj.deleted or type == 'delete':
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return '', 410
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# fill in author/actor if available
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obj_as1 = obj.as1
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for field in 'author', 'actor':
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val = as1.get_object(obj.as1, field)
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if val.keys() == set(['id']) and val['id']:
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# TODO: abstract on obj.source_protocol
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loaded = activitypub.ActivityPub.load(val['id'])
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if loaded and loaded.as1:
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obj_as1 = {**obj_as1, field: loaded.as1}
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# add HTML meta redirect to source page. should trigger for end users in
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# browsers but not for webmention receivers (hopefully).
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html = microformats2.activities_to_html([obj_as1])
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utf8 = '<meta charset="utf-8">'
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url = util.get_url(obj_as1)
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if url:
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refresh = f'<meta http-equiv="refresh" content="0;url={url}">'
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html = html.replace(utf8, utf8 + '\n' + refresh)
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return html
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