microblog.pub/utils/opengraph.py

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2018-05-18 18:41:41 +00:00
from urllib.parse import urlparse
import ipaddress
import opengraph
import requests
from bs4 import BeautifulSoup
from .urlutils import is_url_valid
def links_from_note(note):
tags_href= set()
for t in note.get('tag', []):
h = t.get('href')
if h:
# TODO(tsileo): fetch the URL for Actor profile, type=mention
tags_href.add(h)
links = set()
soup = BeautifulSoup(note['content'])
for link in soup.find_all('a'):
h = link.get('href')
if h.startswith('http') and h not in tags_href and is_url_valid(h):
links.add(h)
return links
def fetch_og_metadata(user_agent, col, remote_id):
doc = col.find_one({'remote_id': remote_id})
if not doc:
raise ValueError
note = doc['activity']['object']
print(note)
links = links_from_note(note)
if not links:
return 0
# FIXME(tsileo): set the user agent by giving HTML directly to OpenGraph
htmls = []
for l in links:
r = requests.get(l, headers={'User-Agent': user_agent})
r.raise_for_status()
htmls.append(r.text)
links_og_metadata = [dict(opengraph.OpenGraph(html=html)) for html in htmls]
col.update_one({'remote_id': remote_id}, {'$set': {'meta.og_metadata': links_og_metadata}})
return len(links)