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- import re
- __all__ = ['cleaner']
- # 独立元素
- INDEPENDENT_TAGS = {
- '<head>[\s\S]*?</head>': '',
- '<html>|<html [^>]*>|</html>': '',
- '<body>|<body [^>]*>|</body>': '',
- '<meta[^<>]*>|<meta [^<>]*>|<meta[^<>]*>[\s\S]*?</meta>|</meta>': '', # 元数据
- '&(nbsp|e[mn]sp|thinsp|zwn?j|#13);': '', # 空格
- '\\xa0|\\u3000': '', # 空格
- '<!--[\s\S]*?-->': '', # 注释
- '<style[^<>]*>[\s\S]*?</style>': '', # 样式
- '<script[^<>]*>[\s\S]*?</script>': '', # JavaScript
- '<input>': '', # 输入框
- '<img[^>]*>': '<br>', # 图片
- }
- # 行内元素
- INLINE_TAGS = {
- '<a>|<a [^>]*>|</a>': '', # 超链接
- '<link>|<link [^>]*>|</link>': '', # 超链接
- '<span>|<span [^>]*>|</span>': '', # span
- '<label>|<label [^>]*>|</label>': '<br>', # label
- '<font>|<font [^>]*>|</font>': '', # font
- }
- # 块级元素
- BLOCK_TAGS = {
- '<div>\s*?</div>':'',
- '<h[1-6][^>]*>|</h[1-6]>': '', # 标题
- '<p>|<p [^>]*>': '<br>', # 段落
- '</p>': '', # 段落
- '<div>|<div [^>]*>': '<br>', # 分割 division
- '</div>': '', # 分割 division
- '<o:p>|<o:p [^>]*>|</o:p>': '' # OFFICE微软WORD段落
- }
- # 其他
- OTHER = {
- '<?xml[^>]*>|<?xml [^>]*>|<?xml:.*?>': '',
- '<epointform>': '',
- '<!doctype html>|<!doctype html [^>]*>': '',
- '【关闭】|关闭': '',
- '【打印】|打印本页': '',
- '【字体:[\s\S]*】': '',
- '文章来源:[\u4e00-\u9fa5]+': '',
- '浏览次数:.*[<]+': '',
- '(责任编辑:.*?)': '',
- '分享到[:]': '',
- }
- # 样式
- CSS_STYLE = {
- 'style="[\s\S]*?"|style ="[\s\S]*?"': '',
- 'bgcolor="[\s\S]*?"|bgcolor ="[\s\S]*?"': '',
- 'bordercolor="[\s\S]*?"|bordercolor ="[\s\S]*?"': '',
- 'class="[\s\S]*?"|class ="[\s\S]*?"': '',
- 'align="[\s\S]*?"|align ="[\s\S]*?"': '',
- 'cellpadding="(\d+)"|cellspacing="(\d+)"': '',
- }
- # 空白符
- BLANKS = {
- '\n\s*\n': '\n',
- '\s*\n\s*': '\n',
- '[^\S\n]': ' ',
- '\s+': ' ',
- }
- # css标签集合
- TAGS = {'table', 'tr', 'td', 'div', 'span', 'p'}
- # css属性集合
- ATTRS = {'id', 'class', 'style', 'width'}
- def _repair_tag():
- """异常的标签组合,用来替换非标准页面的标签"""
- _repairs = {}
- for tag in TAGS:
- for attr in ATTRS:
- key = '{}{}'.format(tag, attr)
- val = '{} {}'.format(tag, attr)
- _repairs[key] = val
- return _repairs
- def _escape_character(html):
- """转义字符"""
- html = html.replace('<', '<')
- html = html.replace('>', '>')
- html = html.replace('"', '"')
- html = html.replace('&', '&')
- return html
- def _lowercase_tag(html):
- """标签归一化处理(全部小写)"""
- tags = re.findall("<[^>]+>", html)
- for tag in tags:
- html = html.replace(tag, str(tag).lower())
- repair_tags = _repair_tag()
- for err, right in repair_tags.items():
- html = html.replace(err, right)
- return html
- def cleaner(html, special=None, completely=False):
- """
- 数据清洗
- :param html: 清洗的页面
- :param special: 额外指定页面清洗规则
- :param completely: 是否完全清洗页面
- :return: 清洗后的页面源码
- """
- if special is None:
- special = {}
- OTHER.update(special)
- remove_tags = {
- **INDEPENDENT_TAGS,
- **INLINE_TAGS,
- **BLOCK_TAGS,
- **OTHER,
- **CSS_STYLE,
- **BLANKS,
- }
- html = _lowercase_tag(html)
- for tag, repl in remove_tags.items():
- html = re.sub(tag, repl, html)
- if completely:
- html = re.sub(r'<canvas[^<>]*>[\s\S]*?</canvas>', '', html) # 画布
- html = re.sub(r'<iframe[^<>]*>[\s\S]*?</iframe>', '', html) # 内框架
- html = re.sub('<([^<>\u4e00-\u9fa5]|微软雅黑|宋体|仿宋)+>', '', html)
- html = _escape_character(html)
- return html
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