import functools
import bleach
from bs4 import BeautifulSoup
from bleach.css_sanitizer import CSSSanitizer
from bleach.linkifier import LinkifyFilter
from functools import partial
from .get import *
from os import path, environ
import re
from mistletoe import markdown
from json import loads, dump
from random import random, choice
import signal
import time
import requests
allowed_tags = ('b','blockquote','br','code','del','em','h1','h2','h3','h4','h5','h6','hr','i',
'li','ol','p','pre','strong','sub','sup','table','tbody','th','thead','td','tr','ul',
'marquee','a','span','ruby','rp','rt','spoiler','img','lite-youtube','video','source','audio','g')
allowed_styles = ['color', 'background-color', 'font-weight', 'text-align', 'filter',]
def allowed_attributes(tag, name, value):
if name == 'style': return True
if tag == 'marquee':
if name in ['direction', 'behavior', 'scrollamount']: return True
if name in {'height', 'width'}:
try: value = int(value.replace('px', ''))
except: return False
if 0 < value <= 250: return True
return False
if tag == 'a':
if name == 'href' and '\\' not in value and 'xn--' not in value:
return True
if name == 'rel' and value == 'nofollow noopener noreferrer': return True
if name == 'target' and value == '_blank': return True
return False
if tag == 'img':
if name in ['src','data-src']: return is_safe_url(value)
if name == 'loading' and value == 'lazy': return True
if name == 'data-bs-toggle' and value == 'tooltip': return True
if name in ['g','b','glow'] and not value: return True
if name in ['alt','title']: return True
if name == 'referrerpolicy' and value == 'no-referrer': return True
return False
if tag == 'lite-youtube':
if name == 'params' and value.startswith('autoplay=1&modestbranding=1'): return True
if name == 'videoid': return True
return False
if tag == 'video':
if name == 'controls' and value == '': return True
if name == 'preload' and value == 'none': return True
return False
if tag == 'source':
if name == 'src': return is_safe_url(value)
if tag == 'audio':
if name == 'src': return is_safe_url(value)
if name == 'controls' and value == '': return True
if name == 'preload' and value == 'none': return True
return False
if tag == 'p':
if name == 'class' and value == 'mb-0': return True
return False
if tag == 'span':
if name == 'data-bs-toggle' and value == 'tooltip': return True
if name == 'title': return True
if name == 'alt': return True
return False
def build_url_re(protocols):
"""Builds the url regex used by linkifier
If you want a different set of tlds or allowed protocols, pass those in
and stomp on the existing ``url_re``::
from bleach import linkifier
my_url_re = linkifier.build_url_re(my_tlds_list, my_protocols)
linker = LinkifyFilter(url_re=my_url_re)
"""
return re.compile(
r"""\(*# Match any opening parentheses.
\b(?"]*)?
# /path/zz (excluding "unsafe" chars from RFC 1738,
# except for ~, which happens in practice)
(?:\#[^#\s\|\\\^\[\]`<>"]*)?
# #hash (excluding "unsafe" chars from RFC 1738,
# except for ~, which happens in practice)
""".format("|".join(sorted(protocols))),
re.IGNORECASE | re.VERBOSE | re.UNICODE,
)
url_re = build_url_re(protocols=['http', 'https'])
def callback(attrs, new=False):
if (None, "href") not in attrs:
return # Incorrect tag
href = attrs[(None, "href")]
# \ in href right after / makes most browsers ditch site hostname and allows for a host injection bypassing the check, see cool
if "\\" in href or not ascii_only_regex.fullmatch(href):
attrs["_text"] = href # Laugh at this user
del attrs[(None, "href")] # Make unclickable and reset harmful payload
return attrs
if not href.startswith('/') and not href.startswith(f'{SITE_FULL}/'):
attrs[(None, "target")] = "_blank"
attrs[(None, "rel")] = "nofollow noopener noreferrer"
return attrs
def render_emoji(html, regexp, golden, marseys_used, b=False):
emojis = list(regexp.finditer(html))
captured = set()
for i in emojis:
if i.group(0) in captured: continue
captured.add(i.group(0))
emoji = i.group(1).lower()
attrs = ''
if b: attrs += ' b'
if golden and len(emojis) <= 20 and ('marsey' in emoji or emoji in marseys_const2):
if random() < 0.0025: attrs += ' g'
elif random() < 0.00125: attrs += ' glow'
old = emoji
emoji = emoji.replace('!','').replace('#','')
if emoji == 'marseyrandom': emoji = choice(marseys_const2)
emoji_partial_pat = ''
emoji_partial = '
'
emoji_html = None
if emoji.endswith('pat') and emoji != 'marseyunpettablepat':
if path.isfile(f"files/assets/images/emojis/{emoji.replace('pat','')}.webp"):
emoji_html = f'
{emoji_partial_pat.format(old, f"/e/{emoji[:-3]}.webp", attrs)}'
elif emoji.startswith('@'):
if u := get_user(emoji[1:-3], graceful=True):
emoji_html = f'
{emoji_partial_pat.format(old, f"/pp/{u.id}", attrs)}'
elif path.isfile(f'files/assets/images/emojis/{emoji}.webp'):
emoji_html = emoji_partial.format(old, f'/e/{emoji}.webp', attrs)
if emoji_html:
marseys_used.add(emoji)
html = re.sub(f'(?' not in sanitized:
sanitized = linefeeds_regex.sub(r'\1\n\n\2', sanitized)
sanitized = greentext_regex.sub(r'\1
\2', sanitized)
sanitized = sanitized.replace('\u200e','').replace('\u200b','').replace("\ufeff", "").replace("𒐪","").replace("\u0589", ":")
sanitized = reddit_regex.sub(r'\1/\2', sanitized)
sanitized = sub_regex.sub(r'\1/\2', sanitized)
v = getattr(g, 'v', None)
names = set(m.group(2) for m in mention_regex.finditer(sanitized))
if limit_pings and len(names) > limit_pings and not v.admin_level: abort(406)
users_list = get_users(names, graceful=True)
users_dict = {}
for u in users_list:
users_dict[u.username.lower()] = u
if u.original_username:
users_dict[u.original_username.lower()] = u
def replacer(m):
u = users_dict.get(m.group(2).lower())
if not u:
return m.group(0)
return f'{m.group(1)}@{u.username}'
sanitized = mention_regex.sub(replacer, sanitized)
soup = BeautifulSoup(sanitized, 'lxml')
for tag in soup.find_all("img"):
if tag.get("src") and not tag["src"].startswith('/pp/'):
if not is_safe_url(tag["src"]):
a = soup.new_tag("a", href=tag["src"], rel="nofollow noopener noreferrer", target="_blank")
a.string = tag["src"]
tag.replace_with(a)
continue
tag["loading"] = "lazy"
tag["data-src"] = tag["src"]
tag["src"] = "/i/l.webp"
tag['alt'] = f'![]({tag["data-src"]})'
if not is_site_url(tag["data-src"]):
tag['referrerpolicy'] = "no-referrer"
if tag.parent.name != 'a':
a = soup.new_tag("a", href=tag["data-src"])
if not is_site_url(a["href"]):
a["rel"] = "nofollow noopener noreferrer"
a["target"] = "_blank"
tag = tag.replace_with(a)
a.append(tag)
for tag in soup.find_all("a"):
if not tag.contents or not str(tag.contents[0]).strip():
tag.extract()
if tag.get("href") and fishylinks_regex.fullmatch(str(tag.string)):
tag.string = tag["href"]
sanitized = str(soup)
sanitized = spoiler_regex.sub(r'
' not in sanitized: sanitized = sanitized.replace('\n','') if showmore and len(sanitized) > 5000: sanitized = showmore_regex.sub(r'\1\2 ', sanitized, count=1) return sanitized.strip() def allowed_attributes_emojis(tag, name, value): if tag == 'img': if name == 'src' and value.startswith('/') and '\\' not in value: return True if name == 'loading' and value == 'lazy': return True if name == 'data-bs-toggle' and value == 'tooltip': return True if name in ['g','glow'] and not value: return True if name in ['alt','title']: return True if tag == 'span': if name == 'data-bs-toggle' and value == 'tooltip': return True if name == 'title': return True if name == 'alt': return True return False return False @with_sigalrm_timeout(1) def filter_emojis_only(title, golden=True, count_marseys=False, graceful=False, torture=False): title = title.strip() if torture: title = torture_ap(title, g.v.username) title = title.replace('','').replace('','').replace("\ufeff", "").replace("𒐪","").replace("\n", "").replace("\r", "").replace("\t", "").replace("&", "&").replace('<','<').replace('>','>').replace('"', '"').replace("'", "'").strip() marseys_used = set() title = render_emoji(title, emoji_regex3, golden, marseys_used) if count_marseys: for marsey in g.db.query(Marsey).filter(Marsey.submitter_id==None, Marsey.name.in_(marseys_used)).all(): marsey.count += 1 g.db.add(marsey) title = strikethrough_regex.sub(r'\1\2', title) title = bleach.clean(title, tags=['img','del','span'], attributes=allowed_attributes_emojis, protocols=['http','https']) if len(title) > 1500 and not graceful: abort(400) else: return title.replace('\n','').strip() def normalize_url(url): url = reddit_domain_regex.sub(r'\1https://old.reddit.com/\3/', url) url = url.replace("https://youtu.be/", "https://youtube.com/watch?v=") \ .replace("https://music.youtube.com/watch?v=", "https://youtube.com/watch?v=") \ .replace("https://www.youtube.com", "https://youtube.com") \ .replace("https://youtube.com/shorts/", "https://youtube.com/watch?v=") \ .replace("https://youtube.com/v/", "https://youtube.com/watch?v=") \ .replace("https://mobile.twitter.com", "https://twitter.com") \ .replace("https://m.facebook.com", "https://facebook.com") \ .replace("https://m.wikipedia.org", "https://wikipedia.org") \ .replace("https://m.youtube.com", "https://youtube.com") \ .replace("https://www.twitter.com", "https://twitter.com") \ .replace("https://www.instagram.com", "https://instagram.com") \ .replace("https://www.tiktok.com", "https://tiktok.com") \ .replace("https://www.streamable.com", "https://streamable.com") \ .replace("https://streamable.com/", "https://streamable.com/e/") \ .replace("https://streamable.com/e/e/", "https://streamable.com/e/") \ .replace("https://search.marsey.cat/#", "https://camas.unddit.com/#") \ .replace("https://imgur.com/", "https://i.imgur.com/") \ .replace("https://nitter.net/", "https://twitter.com/") \ .replace("https://nitter.42l.fr/", "https://twitter.com/") \ .replace("https://nitter.lacontrevoie.fr/", "https://twitter.com/") url = imgur_regex.sub(r'\1_d.webp?maxwidth=9999&fidelity=high', url) url = giphy_regex.sub(r'\1.webp', url) return url def validate_css(css): if '@import' in css: return False, "@import statements not allowed." for i in css_url_regex.finditer(css): url = i.group(1) if not is_safe_url(url): domain = tldextract.extract(url).registered_domain return False, f"The domain '{domain}' is not allowed, please use one of these domains\n\n{approved_embed_hosts}." return True, ""