mirror of
https://github.com/janeczku/calibre-web
synced 2026-08-25 12:18:52 +00:00
67 lines
2.6 KiB
Python
67 lines
2.6 KiB
Python
# -*- coding: utf-8 -*-
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# This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
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# Copyright (C) 2018-2019 OzzieIsaacs
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from . import logger
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from lxml.etree import ParserError
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import re
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log = logger.create()
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CONTROL_CHAR_RE = re.compile(r"[\x00-\x08\x0b\x0c\x0e-\x1f\x7f]")
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try:
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import nh3
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from nh3 import clean as clean_html
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bleach = False
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BASE_ALLOWED_TAGS = nh3.ALLOWED_TAGS
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BASE_ALLOWED_ATTRIBUTES = nh3.ALLOWED_ATTRIBUTES
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except ImportError:
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# at least bleach 6.0 is needed -> incomplatible change from list arguments to set arguments
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from bleach import clean as clean_html
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from bleach.sanitizer import ALLOWED_ATTRIBUTES as BASE_ALLOWED_ATTRIBUTES
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from bleach.sanitizer import ALLOWED_TAGS as BASE_ALLOWED_TAGS
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bleach = True
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ALLOWED_TAGS = set(BASE_ALLOWED_TAGS) | {"p", "span", "div", "pre", "br", "h1", "h2", "h3", "h4", "h5", "h6", "img"}
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ALLOWED_ATTRIBUTES = {
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key: set(value) for key, value in BASE_ALLOWED_ATTRIBUTES.items()
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}
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ALLOWED_ATTRIBUTES["*"] = set(ALLOWED_ATTRIBUTES.get("*", set())) | {"class", "style"}
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ALLOWED_ATTRIBUTES["a"] = set(ALLOWED_ATTRIBUTES.get("a", set())) | {"href", "title", "rel"}
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ALLOWED_ATTRIBUTES["img"] = set(ALLOWED_ATTRIBUTES.get("img", set())) | {"src", "alt", "title", "width", "height"}
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def _normalize_html_input(unsafe_text):
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return CONTROL_CHAR_RE.sub("", unsafe_text)
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def clean_string(unsafe_text, book_id=0):
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try:
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unsafe_text = _normalize_html_input(unsafe_text)
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if bleach:
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safe_text = clean_html(unsafe_text, tags=ALLOWED_TAGS, attributes=ALLOWED_ATTRIBUTES)
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else:
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safe_text = clean_html(unsafe_text, tags=ALLOWED_TAGS, attributes=ALLOWED_ATTRIBUTES, link_rel=None)
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except ParserError as e:
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log.error("Comments of book {} are corrupted: {}".format(book_id, e))
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safe_text = ""
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except TypeError as e:
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log.error("Comments can't be parsed, maybe 'lxml' is too new, try installing 'bleach': {}".format(e))
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safe_text = ""
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return safe_text
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