lemoncurry/entries/from_url.py

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from urllib.parse import urlparse
from django.contrib.sites.models import Site
from django.http import HttpResponse
from django.urls import resolve, Resolver404
from micropub import error
from .models import Entry
def from_url(url: str) -> Entry:
domain = Site.objects.get_current().domain
if not url:
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raise error.bad_req("url parameter required")
if "//" not in url:
url = "//" + url
parts = urlparse(url, scheme="https")
if parts.scheme not in ("http", "https") or parts.netloc != domain:
raise error.bad_req("url does not point to this site")
try:
match = resolve(parts.path)
except Resolver404:
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raise error.bad_req("url does not point to a valid page on this site")
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if match.view_name != "entries:entry":
raise error.bad_req("url does not point to an entry on this site")
try:
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entry = Entry.objects.get(pk=match.kwargs["id"])
except Entry.DoesNotExist:
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raise error.bad_req("url does not point to an existing entry")
return entry