bridgy-fed/render.py

44 wiersze
1.4 KiB
Python

# coding=utf-8
"""Renders mf2 proxy pages based on stored Responses."""
import datetime
from flask import request
from granary import as2, atom, microformats2
from oauth_dropins.webutil.util import json_loads
from app import app, cache
import common
from models import Response
CACHE_TIME = datetime.timedelta(minutes=15)
@app.get('/render')
@cache.cached(timeout=CACHE_TIME.total_seconds(), query_string=True,
response_filter=common.not_5xx)
def render():
"""Fetches a stored Response and renders it as HTML."""
source = common.get_required_param('source')
target = common.get_required_param('target')
id = f'{source} {target}'
resp = Response.get_by_id(id)
if not resp:
return (f'No stored response for {id}', 404)
if resp.source_mf2:
as1 = microformats2.json_to_object(json_loads(resp.source_mf2))
elif resp.source_as2:
as1 = as2.to_as1(json_loads(resp.source_as2))
elif resp.source_atom:
as1 = atom.atom_to_activity(resp.source_atom)
else:
return (f'Stored response for {id} has no data', 404)
# add HTML meta redirect to source page. should trigger for end users in
# browsers but not for webmention receivers (hopefully).
html = microformats2.activities_to_html([as1])
utf8 = '<meta charset="utf-8">'
refresh = f'<meta http-equiv="refresh" content="0;url={source}">'
return html.replace(utf8, utf8 + '\n' + refresh)