193 lines
7.2 KiB
Python
193 lines
7.2 KiB
Python
from app.request import VALID_PARAMS
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from app.utils.filter_utils import *
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from bs4.element import ResultSet
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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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class Filter:
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def __init__(self, user_keys: dict, mobile=False, config=None):
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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 ''
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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.new_tab = config['new_tab'] if 'new_tab' in config else False
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self.alt_redirect = config['alts'] if 'alts' in config else False
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self.mobile = mobile
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self.user_keys = user_keys
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self.main_divs = ResultSet('')
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self._elements = 0
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def __getitem__(self, name):
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return getattr(self, name)
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@property
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def elements(self):
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return self._elements
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def reskin(self, page):
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# Aesthetic only re-skinning
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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 encrypt_path(self, msg, is_element=False):
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# Encrypts path to avoid plaintext results in logs
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if is_element:
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# Element paths are tracked differently in order for the element key to be regenerated
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# once all elements have been loaded
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enc_path = Fernet(self.user_keys['element_key']).encrypt(msg.encode()).decode()
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self._elements += 1
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return enc_path
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return Fernet(self.user_keys['text_key']).encrypt(msg.encode()).decode()
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def clean(self, soup):
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self.main_divs = soup.find('div', {'id': 'main'})
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self.remove_ads()
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self.fix_question_section()
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self.update_styling(soup)
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for img in [_ for _ in soup.find_all('img') if 'src' in _.attrs]:
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self.update_element_src(img, 'image/png')
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for audio in [_ for _ in soup.find_all('audio') if 'src' in _.attrs]:
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self.update_element_src(audio, 'audio/mpeg')
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for link in soup.find_all('a', href=True):
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self.update_link(link)
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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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# Update default footer and header
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footer = soup.find('footer')
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if footer:
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# Remove divs that have multiple links beyond just page navigation
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[_.decompose() for _ in footer.find_all('div', recursive=False)
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if len(_.find_all('a', href=True)) > 3]
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header = soup.find('header')
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if header:
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header.decompose()
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return soup
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def remove_ads(self):
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if not self.main_divs:
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return
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for div in [_ for _ in self.main_divs.find_all('div', recursive=True)]:
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has_ad = len([_ for _ in div.find_all('span', recursive=True) if has_ad_content(_.text)])
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_ = div.decompose() if has_ad else None
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def fix_question_section(self):
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if not self.main_divs:
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return
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question_divs = [_ for _ in self.main_divs.find_all('div', recursive=False) if len(_.find_all('h2')) > 0]
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for question_div in question_divs:
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questions = [_ for _ in question_div.find_all('div', recursive=True) if _.text.endswith('?')]
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for question in questions:
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question['style'] = 'padding: 10px; font-style: italic;'
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def update_element_src(self, element, mime):
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element_src = element['src']
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if element_src.startswith('//'):
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element_src = 'https:' + element_src
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elif element_src.startswith(LOGO_URL):
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# Re-brand with Whoogle logo
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element['src'] = 'static/img/logo.png'
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element['style'] = 'height:40px;width:162px'
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return
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elif element_src.startswith(GOOG_IMG):
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element['src'] = BLANK_B64
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return
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element['src'] = 'element?url=' + self.encrypt_path(element_src, is_element=True) + \
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'&type=' + urlparse.quote(mime)
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# TODO: Non-mobile image results link to website instead of image
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# if not self.mobile:
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# img.append(BeautifulSoup(FULL_RES_IMG.format(element_src), 'html.parser'))
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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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def update_link(self, link):
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# Replace href with only the intended destination (no "utm" type tags)
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href = link['href'].replace('https://www.google.com', '')
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if 'advanced_search' in href or 'tbm=shop' in href:
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# TODO: The "Shopping" tab requires further filtering (see #136)
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# Temporarily removing all links to that tab for now.
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link.decompose()
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return
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elif self.new_tab:
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link['target'] = '_blank'
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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 query_link.startswith('/'):
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# Internal google links (i.e. mail, maps, etc) should still be forwarded to Google
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link['href'] = 'https://google.com' + query_link
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elif '/search?q=' in href:
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# "li:1" implies the query should be interpreted verbatim, so we wrap it in double quotes
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if 'li:1' in href:
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query_link = '"' + query_link + '"'
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new_search = 'search?q=' + self.encrypt_path(query_link)
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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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link['href'] = new_search
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elif 'url?q=' in href:
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# Strip unneeded arguments
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link['href'] = filter_link_args(query_link)
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# Add no-js option
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if self.nojs:
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gen_nojs(link)
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else:
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link['href'] = href
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# Replace link location if "alts" config is enabled
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if self.alt_redirect:
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# Search and replace all link descriptions with alternative location
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link['href'] = get_site_alt(link['href'])
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link_desc = link.find_all(text=re.compile('|'.join(SITE_ALTS.keys())))
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if len(link_desc) == 0:
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return
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# Replace link destination
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link_desc[0].replace_with(get_site_alt(link_desc[0]))
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