mirror of
https://github.com/Hopiu/linkchecker.git
synced 2026-03-24 01:40:23 +00:00
120 lines
4.2 KiB
Python
120 lines
4.2 KiB
Python
# Copyright (C) 2000-2018 Petr Dlouhy
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation; either version 2 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License along
|
|
# with this program; if not, write to the Free Software Foundation, Inc.,
|
|
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
"""
|
|
HTML parser implemented using Beautiful Soup and html.parser.
|
|
"""
|
|
|
|
from io import BytesIO, StringIO
|
|
|
|
from bs4 import (BeautifulSoup, CData, Comment, Doctype, ProcessingInstruction,
|
|
Tag)
|
|
|
|
from ..containers import ListDict
|
|
|
|
|
|
class Parser(object):
|
|
handler = None
|
|
encoding = None
|
|
|
|
def __init__(self, handler):
|
|
self.handler = handler
|
|
self.reset()
|
|
|
|
def feed(self, feed_text):
|
|
if not self.html_doc:
|
|
if isinstance(feed_text, bytes):
|
|
self.html_doc = BytesIO()
|
|
else:
|
|
self.html_doc = StringIO()
|
|
self.html_doc.write(feed_text)
|
|
|
|
def reset(self):
|
|
self.html_doc = None
|
|
|
|
def parse_contents(self, contents):
|
|
for content in contents:
|
|
if isinstance(content, Tag):
|
|
attrs = ListDict()
|
|
for k, v_list in sorted(content.attrs.items()):
|
|
if not isinstance(v_list, list):
|
|
v_list = [v_list]
|
|
for v in v_list:
|
|
# empty parameters returned by BS4
|
|
# are sometimes in bytes:
|
|
if v == b'':
|
|
v = u''
|
|
attrs[k] = v
|
|
if content.is_empty_element:
|
|
self.handler.start_end_element(
|
|
content.name, attrs, content.text.strip(),
|
|
)
|
|
else:
|
|
self.handler.start_element(
|
|
content.name, attrs, content.text.strip(),
|
|
)
|
|
if hasattr(content, 'contents'): # recursion
|
|
self.parse_contents(content.contents)
|
|
if hasattr(self.handler, 'end_element'):
|
|
self.handler.end_element(content.name)
|
|
if content.comments:
|
|
for comment in content.comments:
|
|
if hasattr(self.handler, 'comment'):
|
|
self.handler.comment(comment)
|
|
elif isinstance(content, Doctype):
|
|
if hasattr(self.handler, 'doctype'):
|
|
self.handler.doctype(content[7:])
|
|
elif isinstance(content, Comment):
|
|
if hasattr(self.handler, 'comment'):
|
|
self.handler.comment(content.strip())
|
|
elif isinstance(content, CData):
|
|
if hasattr(self.handler, 'cdata'):
|
|
self.handler.cdata(content)
|
|
elif isinstance(content, ProcessingInstruction):
|
|
if hasattr(self.handler, 'pi'):
|
|
self.handler.pi(content.strip("? "))
|
|
else:
|
|
if hasattr(self.handler, 'characters'):
|
|
self.handler.characters(content)
|
|
|
|
def flush(self):
|
|
soup = BeautifulSoup(self.html_doc.getvalue(), 'html.parser')
|
|
if hasattr(soup, 'contents'):
|
|
self.parse_contents(soup.contents)
|
|
self.encoding = soup.original_encoding
|
|
|
|
def debug(self, text):
|
|
raise NotImplementedError("debug is not implemented")
|
|
|
|
def lineno(self):
|
|
# It seems, that getting line number of element is not
|
|
# implemented in BeautifulSoup, so this is faked
|
|
return 0
|
|
|
|
def last_lineno(self):
|
|
return 0
|
|
|
|
def column(self):
|
|
return 0
|
|
|
|
def last_column(self):
|
|
return 0
|
|
|
|
def pos(self, text):
|
|
return 0
|
|
|
|
|
|
def parser(handler=None):
|
|
return Parser(handler)
|