Make the _soup method able to cope with being given a html string

sites/__init__.py

@@ -177,6 +177,7 @@ class Site:
         raise NotImplementedError()
 
     def _soup(self, url, method='lxml', delay=0, retry=3, retry_delay=10, **kw):
+        if url.startswith('http://') or url.startswith('https://'):
             page = self.session.get(url, **kw)
             if not page:
                 if page.status_code == 403 and page.headers.get('Server', False) == 'cloudflare' and "captcha-bypass" in page.text:
@@ -191,8 +192,13 @@ class Site:
                 raise SiteException("Couldn't fetch", url)
             if delay and delay > 0 and not page.from_cache:
                 time.sleep(delay)
-        soup = BeautifulSoup(page.text, method)
-        return soup, soup.head.base and soup.head.base.get('href') or url
+            text = page.text
+            fallback_base = url
+        else:
+            text = url
+            fallback_base = ''
+        soup = BeautifulSoup(text, method)
+        return soup, soup.head.base and soup.head.base.get('href') or fallback_base
 
     def _form_in_soup(self, soup):
         if soup.name == 'form':
@@ -232,7 +238,7 @@ class Site:
         return data, form.attrs.get('action'), form.attrs.get('method', 'get').lower()
 
     def _new_tag(self, *args, **kw):
-        soup = BeautifulSoup("", 'lxml')
+        soup, nobase = self._soup('')
         return soup.new_tag(*args, **kw)
 
     def _join_url(self, *args, **kwargs):

sites/ao3.py

@@ -4,7 +4,6 @@ import logging
 import datetime
 import re
 import requests_cache
-from bs4 import BeautifulSoup
 from . import register, Site, Section, Chapter, SiteException
 
 logger = logging.getLogger(__name__)
@@ -22,8 +21,9 @@ class ArchiveOfOurOwn(Site):
 
     def login(self, login_details):
         with requests_cache.disabled():
+            # Can't just pass this url to _soup because I need the cookies later
             login = self.session.get('https://archiveofourown.org/users/login')
-            soup = BeautifulSoup(login.text, 'lxml')
+            soup, nobase = self._soup(login.text)
             post, action, method = self._form_data(soup.find(id='new_user'))
             post['user[login]'] = login_details[0]
             post['user[password]'] = login_details[1]

sites/xenforo.py

@@ -4,7 +4,6 @@ import datetime
 import re
 import logging
 import requests_cache
-from bs4 import BeautifulSoup
 
 from . import Site, SiteException, SiteSpecificOption, Section, Chapter
 import mintotp
@@ -57,8 +56,9 @@ class XenForo(Site):
 
     def login(self, login_details):
         with requests_cache.disabled():
+            # Can't just pass this url to _soup because I need the cookies later
             login = self.session.get(self.siteurl('login/'))
-            soup = BeautifulSoup(login.text, 'lxml')
+            soup, nobase = self._soup(login.text)
             post, action, method = self._form_data(soup.find(class_='p-body-content'))
             post['login'] = login_details[0]
             post['password'] = login_details[1]
@@ -70,7 +70,7 @@ class XenForo(Site):
             )
             if not result.ok:
                 return logger.error("Failed to log in as %s", login_details[0])
-            soup = BeautifulSoup(result.text, 'lxml')
+            soup, nobase = self._soup(result.text)
             if twofactor := soup.find('form', action="/login/two-step"):
                 if len(login_details) < 3:
                     return logger.error("Failed to log in as %s; login requires 2FA secret", login_details[0])
@@ -219,7 +219,7 @@ class XenForo(Site):
                 'category_id': fetcher.get('data-category-id'),
                 '_xfResponseType': 'json',
             }).json()
-            responseSoup = BeautifulSoup(response['templateHtml'], 'lxml')
+            responseSoup, nobase = self._soup(response['templateHtml'])
             fetcher.replace_with(responseSoup)
             fetcher = soup.find(class_='ThreadmarkFetcher')