whoogle-search/app/filter.py
Ben Busby 72cbc342af Add ability to set temp config in search query
Dark mode, country, interface language, and search language configs
can now be set in the search query by appending each option as a
url parameter.

Supported args are: 'dark', 'lang_search', 'lang_interface', and 'ctry'

Ex: /search?q=%s&dark=1&lang_search=lang_en...

These config settings persist across page navigation and switching
result type, but will be reset if the main search bar is used.

See #144
2020-11-11 00:40:49 -05:00

192 lines
7.2 KiB
Python

from app.request import VALID_PARAMS
from app.utils.filter_utils import *
from bs4.element import ResultSet
from cryptography.fernet import Fernet
import re
import urllib.parse as urlparse
from urllib.parse import parse_qs
class Filter:
def __init__(self, user_keys: dict, mobile=False, config=None):
if config is None:
config = {}
self.near = config['near'] if 'near' in config else ''
self.dark = config['dark'] if 'dark' in config else False
self.nojs = config['nojs'] if 'nojs' in config else False
self.new_tab = config['new_tab'] if 'new_tab' in config else False
self.alt_redirect = config['alts'] if 'alts' in config else False
self.mobile = mobile
self.user_keys = user_keys
self.main_divs = ResultSet('')
self._elements = 0
def __getitem__(self, name):
return getattr(self, name)
@property
def elements(self):
return self._elements
def reskin(self, page):
# Aesthetic only re-skinning
if self.dark:
page = page.replace('fff', '000').replace('202124', 'ddd').replace('1967D2', '3b85ea')
return page
def encrypt_path(self, msg, is_element=False):
# Encrypts path to avoid plaintext results in logs
if is_element:
# Element paths are tracked differently in order for the element key to be regenerated
# once all elements have been loaded
enc_path = Fernet(self.user_keys['element_key']).encrypt(msg.encode()).decode()
self._elements += 1
return enc_path
return Fernet(self.user_keys['text_key']).encrypt(msg.encode()).decode()
def clean(self, soup):
self.main_divs = soup.find('div', {'id': 'main'})
self.remove_ads()
self.fix_question_section()
self.update_styling(soup)
for img in [_ for _ in soup.find_all('img') if 'src' in _.attrs]:
self.update_element_src(img, 'image/png')
for audio in [_ for _ in soup.find_all('audio') if 'src' in _.attrs]:
self.update_element_src(audio, 'audio/mpeg')
for link in soup.find_all('a', href=True):
self.update_link(link)
input_form = soup.find('form')
if input_form is not None:
input_form['method'] = 'POST'
# Ensure no extra scripts passed through
for script in soup('script'):
script.decompose()
# Update default footer and header
footer = soup.find('footer')
if footer:
# Remove divs that have multiple links beyond just page navigation
[_.decompose() for _ in footer.find_all('div', recursive=False) if len(_.find_all('a', href=True)) > 2]
header = soup.find('header')
if header:
header.decompose()
return soup
def remove_ads(self):
if not self.main_divs:
return
for div in [_ for _ in self.main_divs.find_all('div', recursive=True)]:
has_ad = len([_ for _ in div.find_all('span', recursive=True) if has_ad_content(_.text)])
_ = div.decompose() if has_ad else None
def fix_question_section(self):
if not self.main_divs:
return
question_divs = [_ for _ in self.main_divs.find_all('div', recursive=False) if len(_.find_all('h2')) > 0]
for question_div in question_divs:
questions = [_ for _ in question_div.find_all('div', recursive=True) if _.text.endswith('?')]
for question in questions:
question['style'] = 'padding: 10px; font-style: italic;'
def update_element_src(self, element, mime):
element_src = element['src']
if element_src.startswith('//'):
element_src = 'https:' + element_src
elif element_src.startswith(LOGO_URL):
# Re-brand with Whoogle logo
element['src'] = 'static/img/logo.png'
element['style'] = 'height:40px;width:162px'
return
elif element_src.startswith(GOOG_IMG):
element['src'] = BLANK_B64
return
element['src'] = 'element?url=' + self.encrypt_path(element_src, is_element=True) + \
'&type=' + urlparse.quote(mime)
# TODO: Non-mobile image results link to website instead of image
# if not self.mobile:
# img.append(BeautifulSoup(FULL_RES_IMG.format(element_src), 'html.parser'))
def update_styling(self, soup):
# Remove unnecessary button(s)
for button in soup.find_all('button'):
button.decompose()
# Remove svg logos
for svg in soup.find_all('svg'):
svg.decompose()
# Update logo
logo = soup.find('a', {'class': 'l'})
if logo and self.mobile:
logo['style'] = 'display:flex; justify-content:center; align-items:center; color:#685e79; ' \
'font-size:18px; '
# Fix search bar length on mobile
try:
search_bar = soup.find('header').find('form').find('div')
search_bar['style'] = 'width: 100%;'
except AttributeError:
pass
def update_link(self, link):
# Replace href with only the intended destination (no "utm" type tags)
href = link['href'].replace('https://www.google.com', '')
if 'advanced_search' in href or 'tbm=shop' in href:
# TODO: The "Shopping" tab requires further filtering (see #136)
# Temporarily removing all links to that tab for now.
link.decompose()
return
elif self.new_tab:
link['target'] = '_blank'
result_link = urlparse.urlparse(href)
query_link = parse_qs(result_link.query)['q'][0] if '?q=' in href else ''
if query_link.startswith('/'):
# Internal google links (i.e. mail, maps, etc) should still be forwarded to Google
link['href'] = 'https://google.com' + query_link
elif '/search?q=' in href:
# "li:1" implies the query should be interpreted verbatim, so we wrap it in double quotes
if 'li:1' in href:
query_link = '"' + query_link + '"'
new_search = 'search?q=' + self.encrypt_path(query_link)
query_params = parse_qs(urlparse.urlparse(href).query)
for param in VALID_PARAMS:
param_val = query_params[param][0] if param in query_params else ''
new_search += '&' + param + '=' + param_val
link['href'] = new_search
elif 'url?q=' in href:
# Strip unneeded arguments
link['href'] = filter_link_args(query_link)
# Add no-js option
if self.nojs:
gen_nojs(link)
else:
link['href'] = href
# Replace link location if "alts" config is enabled
if self.alt_redirect:
# Search and replace all link descriptions with alternative location
link['href'] = get_site_alt(link['href'])
link_desc = link.find_all(text=re.compile('|'.join(SITE_ALTS.keys())))
if len(link_desc) == 0:
return
# Replace link destination
link_desc[0].replace_with(get_site_alt(link_desc[0]))