379 lines
14 KiB
Python
379 lines
14 KiB
Python
# (C) 2021 lifegpc
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# This file is part of rssbot.
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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 Affero General Public License as published
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# by 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 Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from xml.dom import minidom
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from html.parser import HTMLParser
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from html import escape, unescape
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import sys
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import requests
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from traceback import format_exc
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from urllib.parse import urljoin
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class HTMLContent:
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def __init__(self):
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self.__list = []
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def add(self, s: str, needescaped: bool = False):
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self.__list.append((s, needescaped))
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def export(self) -> str:
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r = ''
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for s, e in self.__list:
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if e:
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r = r + escape(s)
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else:
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r = r + s
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return r
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class HTMLSimpleParser(HTMLParser):
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def __init__(self, baseUrl: str = None):
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self.data = ''
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self.tagName = []
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self.tagContent = []
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self.tagAttrs = []
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self.imgList = []
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self.videoList = []
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self.baseUrl = ''
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if baseUrl is not None:
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self.baseUrl = baseUrl
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HTMLParser.__init__(self)
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def handle_startendtag(self, tag, attrs):
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if tag == 'br':
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if len(self.tagName) == 0:
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self.data = self.data + '\n'
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else:
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self.tagContent[-1].add('\n')
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def handle_starttag(self, tag, attrs):
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if tag == 'br':
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if len(self.tagName) == 0:
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self.data = self.data + '\n'
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else:
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self.tagContent[-1].add('\n')
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return
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elif tag == 'img':
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for key, value in attrs:
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if key == 'src':
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self.imgList.append(urljoin(self.baseUrl, value))
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break
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return
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elif tag == 'video':
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p = {}
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for key, value in attrs:
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if key == 'src':
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p['src'] = urljoin(self.baseUrl, value)
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if key == 'poster':
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p['poster'] = urljoin(self.baseUrl, value)
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if 'src' in p:
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self.videoList.append(p)
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return
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self.tagName.append(tag)
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self.tagContent.append(HTMLContent())
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self.tagAttrs.append('')
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if tag == 'a':
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for key, value in attrs:
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if key == 'href':
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self.tagAttrs[-1] = f'{self.tagAttrs[-1]} href="{urljoin(self.baseUrl, value)}"'
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def handle_data(self, data):
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if len(self.tagName) > 0:
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self.tagContent[-1].add(data, True)
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else:
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self.data = self.data + escape(data)
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def handle_endtag(self, tag):
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if tag in ['a', 'b', 'i', 'u', 's', 'strong', 'em', 'ins', 'strike', 'del', 'code', 'pre']:
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if len(self.tagName) == 1:
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self.data = f"{self.data}<{tag}{self.tagAttrs[-1]}>{self.tagContent[-1].export()}</{tag}>"
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elif len(self.tagName) > 1:
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self.tagContent[-2].add(
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f"<{tag}{self.tagAttrs[-1]}>{self.tagContent[-1].export()}</{tag}>")
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elif tag not in ['img', 'video', 'br']:
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if len(self.tagName) == 1:
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self.data = f"{self.data}{self.tagContent[-1].export()}"
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elif len(self.tagName) > 1:
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self.tagContent[-2].add(f"{self.tagContent[-1].export()}")
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else:
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return
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self.tagName = self.tagName[:-1]
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self.tagContent = self.tagContent[:-1]
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self.tagAttrs = self.tagAttrs[:-1]
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class RSSParser:
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def __init__(self):
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pass
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def __checkasratom(self):
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self._root = self.xmldoc.documentElement
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if self._root.nodeName != 'feed':
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return False
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m = {}
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itemList = []
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for i in self._root.childNodes:
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if i.nodeName == 'entry':
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itemList.append(self.__dealItemAtom(i))
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elif i.nodeName == 'link':
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typ = 'text/html'
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if 'type' in i.attributes:
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typ = i.attributes['type'].nodeValue
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if 'href' in i.attributes and typ == 'text/html':
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m[i.nodeName] = i.attributes['href'].nodeValue
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elif i.nodeName == 'author':
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for k in i.childNodes:
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if k.nodeName == 'name':
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m['author'] = k.nodeValue
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break
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elif len(k.childNodes) == 1 and k.firstChild.nodeName == '#cdata-section':
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m['author'] = k.firstChild.nodeValue
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break
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else:
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if len(i.childNodes) == 0:
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m[i.nodeName] = i.nodeValue
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elif len(i.childNodes) == 1 and i.firstChild.nodeName == '#cdata-section':
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m[i.nodeName] = i.firstChild.nodeValue
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else:
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m[i.nodeName] = ''
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for k in i.childNodes:
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m[i.nodeName] = m[i.nodeName] + k.toxml()
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if 'title' not in m or m['title'] is None or m['title'] == '':
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return False
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self.m = m
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self.title = m['title']
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self.ttl = None
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self.itemList = itemList
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self._type = 'atom'
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return True
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def __checkasrss2(self):
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self._root = self.xmldoc.documentElement
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if self._root.localName != 'rss' or len(self._root.childNodes) != 1:
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return False
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self._root2 = self._root.childNodes[0]
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if self._root2.localName != 'channel':
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return False
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m = {}
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itemList = []
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for i in self._root2.childNodes:
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if i.nodeName == 'item':
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itemList.append(self.__dealItem(i))
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elif i.nodeName == 'atom:link':
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if 'href' in i.attributes:
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m[i.nodeName] = i.attributes['href'].nodeValue
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else:
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if len(i.childNodes) == 0:
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m[i.nodeName] = i.nodeValue
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elif len(i.childNodes) == 1 and i.firstChild.nodeName == '#cdata-section':
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m[i.nodeName] = i.firstChild.nodeValue
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else:
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m[i.nodeName] = ''
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for k in i.childNodes:
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m[i.nodeName] = m[i.nodeName] + k.toxml()
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if 'title' not in m or m['title'] is None or m['title'] == '':
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return False
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self.m = m
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self.title = m['title']
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self.ttl = None
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if 'ttl' in m and m['ttl'] is not None and m['ttl'].isnumeric():
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self.ttl = int(m['ttl'])
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self.itemList = itemList
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self._type = 'rss2.0'
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return True
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def __dealItem(self, node):
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m = {}
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for i in node.childNodes:
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if i.nodeName == 'link':
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if len(i.childNodes) == 0:
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m[i.nodeName] = i.nodeValue
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else:
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m[i.nodeName] = ''
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for k in i.childNodes:
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m[i.nodeName] = m[i.nodeName] + k.toxml()
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break
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for i in node.childNodes:
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if i.nodeName == 'link':
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continue
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elif len(i.childNodes) == 0:
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m[i.nodeName] = i.nodeValue
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elif len(i.childNodes) == 1 and i.firstChild.nodeName == '#cdata-section':
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p = HTMLSimpleParser()
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if 'link' in m and m['link'] is not None:
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p.baseUrl = m['link']
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p.feed(i.firstChild.nodeValue)
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if p.data == '' and i.firstChild.nodeValue.find('<') == -1:
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m[i.nodeName] = i.firstChild.nodeValue
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else:
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m[i.nodeName] = p.data
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if i.nodeName in ['description', 'content:encoded']:
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if i.nodeName == 'content:encoded':
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m['description'] = m['content:encoded']
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del m['content:encoded']
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m['imgList'] = p.imgList
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m['videoList'] = p.videoList
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else:
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m[i.nodeName] = ''
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for k in i.childNodes:
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m[i.nodeName] = m[i.nodeName] + k.toxml()
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return m
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def __dealItemAtom(self, node):
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m = {}
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for i in node.childNodes:
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if i.nodeName == 'link':
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if 'href' in i.attributes:
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m[i.nodeName] = i.attributes['href'].nodeValue
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for i in node.childNodes:
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if i.nodeName == 'author':
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for k in i.childNodes:
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if k.nodeName == 'name':
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if k.nodeValue is not None:
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m['author'] = k.nodeValue
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break
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elif len(k.childNodes) == 1 and k.firstChild.nodeName == '#cdata-section':
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m['author'] = k.firstChild.nodeValue
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break
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elif i.nodeName == 'link':
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continue
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elif i.nodeName in ['title', 'content', 'summary']:
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typ = 'text'
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if 'type' in i.attributes:
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if i.attributes['type'].nodeValue in ['text', 'html', 'xhtml']:
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typ = i.attributes['type'].nodeValue
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if len(i.childNodes) == 1 and i.firstChild.nodeName == '#cdata-section':
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p = HTMLSimpleParser()
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if 'link' in m and m['link'] is not None:
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p.baseUrl = m['link']
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p.feed(i.firstChild.nodeValue)
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if p.data == '' and i.firstChild.nodeValue.find('<') == -1:
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m[i.nodeName] = i.firstChild.nodeValue
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else:
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m[i.nodeName] = p.data
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if i.nodeName in ['content', 'summary']:
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m['imgList'] = p.imgList
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m['videoList'] = p.videoList
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m['description'] = m[i.nodeName]
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del m[i.nodeName]
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elif i.nodeValue is None and len(i.childNodes) == 0:
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continue
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elif typ == 'text':
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s = ''
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if i.nodeValue is not None:
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s = i.nodeValue
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else:
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for k in i.childNodes:
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s = s + k.toxml()
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m[i.nodeName] = s
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elif typ == 'html':
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s = ''
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if i.nodeValue is not None:
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s = i.nodeValue
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else:
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for k in i.childNodes:
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s = s + k.toxml()
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p = HTMLSimpleParser()
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if 'link' in m and m['link'] is not None:
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p.baseUrl = m['link']
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p.feed(unescape(s))
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if p.data == '' and i.firstChild.nodeValue.find('<') == -1:
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m[i.nodeName] = i.firstChild.nodeValue
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else:
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m[i.nodeName] = p.data
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if i.nodeName in ['content', 'summary']:
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m['imgList'] = p.imgList
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m['videoList'] = p.videoList
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m['description'] = m[i.nodeName]
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del m[i.nodeName]
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elif typ == 'xhtml':
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p = HTMLSimpleParser()
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if 'link' in m and m['link'] is not None:
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p.baseUrl = m['link']
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p.feed(i.firstChild.toxml())
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if p.data == '' and i.firstChild.nodeValue.find('<') == -1:
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m[i.nodeName] = i.firstChild.nodeValue
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else:
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m[i.nodeName] = p.data
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if i.nodeName in ['content', 'summary']:
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m['imgList'] = p.imgList
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m['videoList'] = p.videoList
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m['description'] = m[i.nodeName]
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del m[i.nodeName]
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elif len(i.childNodes) == 0:
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m[i.nodeName] = i.nodeValue
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elif len(i.childNodes) == 1 and i.firstChild.nodeName == '#cdata-section':
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p = HTMLSimpleParser()
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if 'link' in m and m['link'] is not None:
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p.baseUrl = m['link']
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p.feed(i.firstChild.nodeValue)
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if p.data == '' and i.firstChild.nodeValue.find('<') == -1:
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m[i.nodeName] = i.firstChild.nodeValue
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else:
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m[i.nodeName] = p.data
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else:
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m[i.nodeName] = ''
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for k in i.childNodes:
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m[i.nodeName] = m[i.nodeName] + k.toxml()
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return m
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def check(self):
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for f in [self.__checkasrss2, self.__checkasratom]:
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try:
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if f():
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self.m['_type'] = self._type
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return True
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except:
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print(format_exc())
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pass
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return False
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def normalize(self):
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self.removeblank(self.xmldoc.documentElement)
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self.xmldoc.normalize()
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def parse(self, fn: str):
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try:
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if fn.find('://') > -1:
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re = requests.get(fn)
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if re.status_code == 200:
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self.xmldoc = minidom.parseString(re.text)
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else:
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self.xmldoc = minidom.parse(fn)
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self.normalize()
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return True
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except:
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return False
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def removeblank(self, node):
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for i in node.childNodes:
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if i.nodeType == minidom.Node.TEXT_NODE:
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if i.nodeValue:
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i.nodeValue = i.nodeValue.strip()
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elif i.nodeType == minidom.Node.ELEMENT_NODE:
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self.removeblank(i)
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if __name__ == "__main__":
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if len(sys.argv) > 1:
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fn = sys.argv[1]
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p = RSSParser()
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p.parse(fn)
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if p.check():
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print(p._type)
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else:
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print('解析失败')
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