440c4e9c50
The lxml dependency in the project was fairly unnecessary, and made the initial build time for the project considerably slower. This replaces all instances of lxml with either the default html parser (for bs4 constructors) or the built in xml.etree package (for search suggestion parsing).
231 lines
8.0 KiB
Python
231 lines
8.0 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(
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'fff', '000').replace(
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'202124', 'ddd').replace(
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'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 encrypted separately from text, to allow key
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# regeneration once all items have been served to the user
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enc_path = Fernet(
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self.user_keys['element_key']
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).encrypt(msg.encode()).decode()
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self._elements += 1
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return enc_path
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return Fernet(
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self.user_keys['text_key']
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).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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div_ads = [_ for _ in div.find_all('span', recursive=True)
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if has_ad_content(_.text)]
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_ = div.decompose() if len(div_ads) 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(
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'div', recursive=False
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) if len(_.find_all('h2')) > 0]
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if len(question_divs) == 0:
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return
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# Wrap section in details element to allow collapse/expand
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details = BeautifulSoup(features='html.parser').new_tag('details')
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summary = BeautifulSoup(features='html.parser').new_tag('summary')
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summary.string = question_divs[0].find('h2').text
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question_divs[0].find('h2').decompose()
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details.append(summary)
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question_divs[0].wrap(details)
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for question_div in question_divs:
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questions = [_ for _ in question_div.find_all(
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'div', recursive=True
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) 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(
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element_src,
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is_element=True) + '&type=' + urlparse.quote(mime)
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# FIXME: Non-mobile image results link to website instead of image
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# if not self.mobile:
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# img.append(
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# BeautifulSoup(FULL_RES_IMG.format(element_src),
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# '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; '
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'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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# FIXME: 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(
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result_link.query
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)['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
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# 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,
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# which is accomplished by wrapping the query 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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if param not in query_params:
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continue
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param_val = query_params[param][0]
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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
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# with alternative location
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link['href'] = get_site_alt(link['href'])
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link_desc = link.find_all(
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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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