mirror of
https://git.sr.ht/~tsileo/microblog.pub
synced 2024-11-15 11:14:28 +00:00
55 lines
1.3 KiB
Python
55 lines
1.3 KiB
Python
|
import logging
|
||
|
|
from typing import Optional
|
||
|
|
from urllib.parse import urlparse
|
||
|
|
|
||
|
|
import requests
|
||
|
|
from bs4 import BeautifulSoup
|
||
|
|
from little_boxes.urlutils import is_url_valid
|
||
|
|
|
||
|
|
logger = logging.getLogger(__name__)
|
||
|
|
|
||
|
|
|
||
|
|
def _make_abs(url: Optional[str], parent: str) -> Optional[str]:
|
||
|
|
if url is None:
|
||
|
|
return None
|
||
|
|
|
||
|
|
if url.startswith("http"):
|
||
|
|
return url
|
||
|
|
|
||
|
|
return (
|
||
|
|
urlparse(parent)._replace(path=url, params="", query="", fragment="").geturl()
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
def _discover_webmention_endoint(url: str) -> Optional[str]:
|
||
|
|
try:
|
||
|
|
resp = requests.get(url, timeout=3)
|
||
|
|
except Exception:
|
||
|
|
return None
|
||
|
|
|
||
|
|
for k, v in resp.links.items():
|
||
|
|
if "webmention" in k:
|
||
|
|
return _make_abs(resp.links[k].get("url"), url)
|
||
|
|
|
||
|
|
soup = BeautifulSoup(resp.text, "html5lib")
|
||
|
|
wlinks = soup.find_all(["link", "a"], attrs={"rel": "webmention"})
|
||
|
|
for wlink in wlinks:
|
||
|
|
if "href" in wlink.attrs:
|
||
|
|
return _make_abs(wlink.attrs["href"], url)
|
||
|
|
|
||
|
|
return None
|
||
|
|
|
||
|
|
|
||
|
|
def discover_webmention_endoint(url: str) -> Optional[str]:
|
||
|
|
"""Discover the Webmention endpoint of a given URL, if any.
|
||
|
|
|
||
|
|
Passes all the tests at https://webmention.rocks!
|
||
|
|
|
||
|
|
"""
|
||
|
|
wurl = _discover_webmention_endoint(url)
|
||
|
|
if wurl is None:
|
||
|
|
return None
|
||
|
|
if not is_url_valid(wurl):
|
||
|
|
return None
|
||
|
|
return wurl
|