158 lines
5.4 KiB
Python
158 lines
5.4 KiB
Python
from app.request import VALID_PARAMS
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from bs4 import BeautifulSoup
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from cryptography.fernet import Fernet
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import re
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import urllib.parse as urlparse
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from urllib.parse import parse_qs
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SKIP_ARGS = ['ref_src', 'utm']
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class Filter:
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def __init__(self, mobile=False, config=None, secret_key=''):
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if config is None:
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config = {}
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self.near = config['near'] if 'near' in config else None
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self.dark = config['dark'] if 'dark' in config else False
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self.nojs = config['nojs'] if 'nojs' in config else False
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self.mobile = mobile
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self.secret_key = secret_key
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def __getitem__(self, name):
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return getattr(self, name)
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def reskin(self, page):
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# Aesthetic only re-skinning
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page = page.replace('>G<', '>Sh<')
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pattern = re.compile('4285f4|ea4335|fbcc05|34a853|fbbc05', re.IGNORECASE)
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page = pattern.sub('685e79', page)
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if self.dark:
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page = page.replace('fff', '000').replace('202124', 'ddd').replace('1967D2', '3b85ea')
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return page
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def clean(self, soup):
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self.remove_ads(soup)
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self.update_image_paths(soup)
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self.update_styling(soup)
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self.update_links(soup)
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input_form = soup.find('form')
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if input_form is not None:
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input_form['method'] = 'POST'
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# Ensure no extra scripts passed through
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for script in soup('script'):
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script.decompose()
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footer = soup.find('div', id='sfooter')
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if footer is not None:
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footer.decompose()
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return soup
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def remove_ads(self, soup):
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main_divs = soup.find('div', {'id': 'main'})
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if main_divs is None:
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return
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result_divs = main_divs.find_all('div', recursive=False)
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# Only ads/sponsored content use classes in the list of result divs
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ad_divs = [ad_div for ad_div in result_divs if 'class' in ad_div.attrs]
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for div in ad_divs:
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div.decompose()
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def update_image_paths(self, soup):
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for img in [_ for _ in soup.find_all('img') if 'src' in _]:
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img_src = img['src']
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if img_src.startswith('//'):
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img_src = 'https:' + img_src
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enc_src = Fernet(self.secret_key).encrypt(img_src.encode())
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img['src'] = '/tmp?image_url=' + enc_src.decode()
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def update_styling(self, soup):
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# Remove unnecessary button(s)
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for button in soup.find_all('button'):
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button.decompose()
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# Remove svg logos
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for svg in soup.find_all('svg'):
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svg.decompose()
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# Update logo
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logo = soup.find('a', {'class': 'l'})
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if logo and self.mobile:
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logo['style'] = 'display:flex; justify-content:center; align-items:center; color:#685e79; ' \
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'font-size:18px; '
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# Fix search bar length on mobile
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try:
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search_bar = soup.find('header').find('form').find('div')
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search_bar['style'] = 'width: 100%;'
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except AttributeError:
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pass
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# Set up dark mode if active
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if self.dark:
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soup.find('html')['style'] = 'scrollbar-color: #333 #111;'
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for input_element in soup.findAll('input'):
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input_element['style'] = 'color:#fff;'
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def update_links(self, soup):
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# Replace hrefs with only the intended destination (no "utm" type tags)
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for a in soup.find_all('a', href=True):
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href = a['href']
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if '/advanced_search' in href:
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a.decompose()
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continue
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result_link = urlparse.urlparse(href)
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query_link = parse_qs(result_link.query)['q'][0] if '?q=' in href else ''
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if '/search?q=' in href:
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enc_result = Fernet(self.secret_key).encrypt(query_link.encode())
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new_search = '/search?q=' + enc_result.decode()
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query_params = parse_qs(urlparse.urlparse(href).query)
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for param in VALID_PARAMS:
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param_val = query_params[param][0] if param in query_params else ''
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new_search += '&' + param + '=' + param_val
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a['href'] = new_search
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continue
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if 'url?q=' in href:
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# Strip unneeded arguments
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parsed_link = urlparse.urlparse(query_link)
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link_args = parse_qs(parsed_link.query)
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safe_args = {}
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for arg in link_args.keys():
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if arg in SKIP_ARGS:
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continue
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safe_args[arg] = link_args[arg]
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# Remove original link query and replace with filtered args
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query_link = query_link.replace(parsed_link.query, '')
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if len(safe_args) > 1:
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query_link = query_link + urlparse.urlencode(safe_args)
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else:
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query_link = query_link.replace('?', '')
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a['href'] = query_link
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# Add no-js option
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if self.nojs:
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gen_nojs(soup, query_link, a)
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def gen_nojs(soup, link, sibling):
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nojs_link = soup.new_tag('a')
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nojs_link['href'] = '/window?location=' + link
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nojs_link['style'] = 'display:block;width:100%;'
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nojs_link.string = 'NoJS Link: ' + nojs_link['href']
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sibling.append(BeautifulSoup('<br><hr><br>', 'html.parser'))
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sibling.append(nojs_link)
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