74 lines
2.2 KiB
Python
74 lines
2.2 KiB
Python
import re
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import bs4
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HTML_TAGS_MOSTLY_CONTENTLESS: set[str] = {'style', 'svg', 'link', 'br', 'math',
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'canvas'}
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HTML_TAGS_WITH_LITTLE_CONTENT: set[str] = { 'head', 'script', 'meta' } | HTML_TAGS_MOSTLY_CONTENTLESS
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def normalize_text(text: str) -> str:
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text = text.replace('\t', ' ')
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text = text.replace('\r', '')
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text = re.sub(r'\s*\n\s*\n\s*', '\n\n', text)
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text = re.sub(r' +', ' ', text)
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text = re.sub(r'^\s+', '', text)
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text = re.sub(r'\s+$', '', text)
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return text.encode('utf-8')
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def normalize_soup_bs4(soup: bs4.BeautifulSoup) -> bytes:
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for comment in soup(text=lambda text: isinstance(text, bs4.Comment)):
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comment.extract()
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del comment
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for element_name in HTML_TAGS_WITH_LITTLE_CONTENT:
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for script_elements in soup(element_name):
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script_elements.decompose()
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del element_name
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soup.smooth()
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return soup
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def normalize_soup_lxml(soup) -> bytes:
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for element_name in HTML_TAGS_WITH_LITTLE_CONTENT:
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for script_elements in soup.cssselect(element_name):
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script_elements.drop_tree()
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del script_elements
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del element_name
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return soup
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def normalize_soup(soup) -> bytes:
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text = None
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if isinstance(soup, bs4.BeautifulSoup):
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text = normalize_soup_bs4(soup).get_text()
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else:
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text = normalize_soup_lxml(soup).text_content()
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return normalize_text(text)
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def normalize_soup_slightly(soup, classes = True, scripts = True, comments = True):
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# Little if any content
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for tag in HTML_TAGS_MOSTLY_CONTENTLESS:
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for e in soup.select(tag):
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e.decompose()
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if classes:
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for e in soup.find_all(class_=True):
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del e['class']
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for e in soup.find_all('script', src=True):
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e.decompose()
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for e in soup.find_all(style=True):
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del e['style']
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for e in soup.select('a'):
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del e['height'], e['target'], e['rel'], e['onclick']
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for e in soup.select('a[href=""]'):
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del e['href']
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if scripts:
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for e in soup.find_all('script'):
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e.decompose()
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if comments:
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for c in soup.find_all(string=lambda text: isinstance(text, bs4.Comment)):
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c.extract()
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soup.smooth()
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return soup
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