mirror of
https://github.com/benbusby/whoogle-search
synced 2024-11-14 18:12:45 +00:00
b1e468ff01
Fix the exception `AttributeError: 'Filter' object has no attribute 'block_url'` introduced in this commit [1]. `self.block_title` and `self.block_url` were members of the Filter object[2], but not anymore after commit [1]. This bug can be reproduced with setting WHOOGLE_CONFIG_BLOCK_URL to a non-empty string. [1]10a15e06e1[2]284a8102c8
665 lines
24 KiB
Python
665 lines
24 KiB
Python
import cssutils
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from bs4 import BeautifulSoup
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from bs4.element import ResultSet, Tag
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from cryptography.fernet import Fernet
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from flask import render_template
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import urllib.parse as urlparse
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from urllib.parse import parse_qs
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import re
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from app.models.g_classes import GClasses
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from app.request import VALID_PARAMS, MAPS_URL
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from app.utils.misc import get_abs_url, read_config_bool
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from app.utils.results import (
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BLANK_B64, GOOG_IMG, GOOG_STATIC, G_M_LOGO_URL, LOGO_URL, SITE_ALTS,
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has_ad_content, filter_link_args, append_anon_view, get_site_alt,
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)
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from app.models.endpoint import Endpoint
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from app.models.config import Config
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MAPS_ARGS = ['q', 'daddr']
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minimal_mode_sections = ['Top stories', 'Images', 'People also ask']
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unsupported_g_pages = [
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'support.google.com',
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'accounts.google.com',
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'policies.google.com',
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'google.com/preferences',
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'google.com/intl',
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'advanced_search',
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'tbm=shop'
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]
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def extract_q(q_str: str, href: str) -> str:
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"""Extracts the 'q' element from a result link. This is typically
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either the link to a result's website, or a string.
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Args:
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q_str: The result link to parse
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href: The full url to check for standalone 'q' elements first,
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rather than parsing the whole query string and then checking.
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Returns:
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str: The 'q' element of the link, or an empty string
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"""
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return parse_qs(q_str)['q'][0] if ('&q=' in href or '?q=' in href) else ''
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def build_map_url(href: str) -> str:
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"""Tries to extract known args that explain the location in the url. If a
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location is found, returns the default url with it. Otherwise, returns the
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url unchanged.
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Args:
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href: The full url to check.
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Returns:
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str: The parsed url, or the url unchanged.
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"""
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# parse the url
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parsed_url = parse_qs(href)
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# iterate through the known parameters and try build the url
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for param in MAPS_ARGS:
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if param in parsed_url:
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return MAPS_URL + "?q=" + parsed_url[param][0]
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# query could not be extracted returning unchanged url
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return href
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def clean_query(query: str) -> str:
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"""Strips the blocked site list from the query, if one is being
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used.
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Args:
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query: The query string
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Returns:
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str: The query string without any "-site:..." filters
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"""
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return query[:query.find('-site:')] if '-site:' in query else query
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def clean_css(css: str, page_url: str) -> str:
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"""Removes all remote URLs from a CSS string.
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Args:
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css: The CSS string
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Returns:
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str: The filtered CSS, with URLs proxied through Whoogle
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"""
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sheet = cssutils.parseString(css)
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urls = cssutils.getUrls(sheet)
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for url in urls:
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abs_url = get_abs_url(url, page_url)
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if abs_url.startswith('data:'):
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continue
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css = css.replace(
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url,
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f'{Endpoint.element}?type=image/png&url={abs_url}'
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)
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return css
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class Filter:
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# Limit used for determining if a result is a "regular" result or a list
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# type result (such as "people also asked", "related searches", etc)
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RESULT_CHILD_LIMIT = 7
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def __init__(
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self,
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user_key: str,
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config: Config,
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root_url='',
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page_url='',
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query='',
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mobile=False) -> None:
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self.soup = None
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self.config = config
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self.mobile = mobile
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self.user_key = user_key
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self.page_url = page_url
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self.query = query
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self.main_divs = ResultSet('')
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self._elements = 0
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self._av = set()
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self.root_url = root_url[:-1] if root_url.endswith('/') else root_url
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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 encrypt_path(self, path, is_element=False) -> str:
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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(self.user_key).encrypt(path.encode()).decode()
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self._elements += 1
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return enc_path
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return Fernet(self.user_key).encrypt(path.encode()).decode()
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def clean(self, soup) -> BeautifulSoup:
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self.soup = soup
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self.main_divs = self.soup.find('div', {'id': 'main'})
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self.remove_ads()
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self.remove_block_titles()
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self.remove_block_url()
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self.collapse_sections()
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self.update_css()
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self.update_styling()
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self.remove_block_tabs()
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for img in [_ for _ in self.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 self.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 self.soup.find_all('a', href=True):
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self.update_link(link)
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if self.config.alts:
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self.site_alt_swap()
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input_form = self.soup.find('form')
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if input_form is not None:
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input_form['method'] = 'GET' if self.config.get_only else 'POST'
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# Use a relative URI for submissions
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input_form['action'] = 'search'
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# Ensure no extra scripts passed through
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for script in self.soup('script'):
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script.decompose()
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# Update default footer and header
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footer = self.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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for link in footer.find_all('a', href=True):
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link['href'] = f'{link["href"]}&preferences={self.config.preferences}'
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header = self.soup.find('header')
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if header:
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header.decompose()
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self.remove_site_blocks(self.soup)
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return self.soup
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def remove_site_blocks(self, soup) -> None:
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if not self.config.block or not soup.body:
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return
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search_string = ' '.join(['-site:' +
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_ for _ in self.config.block.split(',')])
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selected = soup.body.findAll(text=re.compile(search_string))
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for result in selected:
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result.string.replace_with(result.string.replace(
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search_string, ''))
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def remove_ads(self) -> None:
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"""Removes ads found in the list of search result divs
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Returns:
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None (The soup object is modified directly)
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"""
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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 remove_block_titles(self) -> None:
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if not self.main_divs or not self.config.block_title:
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return
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block_title = re.compile(self.config.block_title)
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for div in [_ for _ in self.main_divs.find_all('div', recursive=True)]:
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block_divs = [_ for _ in div.find_all('h3', recursive=True)
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if block_title.search(_.text) is not None]
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_ = div.decompose() if len(block_divs) else None
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def remove_block_url(self) -> None:
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if not self.main_divs or not self.config.block_url:
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return
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block_url = re.compile(self.config.block_url)
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for div in [_ for _ in self.main_divs.find_all('div', recursive=True)]:
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block_divs = [_ for _ in div.find_all('a', recursive=True)
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if block_url.search(_.attrs['href']) is not None]
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_ = div.decompose() if len(block_divs) else None
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def remove_block_tabs(self) -> None:
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if self.main_divs:
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for div in self.main_divs.find_all(
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'div',
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attrs={'class': f'{GClasses.main_tbm_tab}'}
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):
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_ = div.decompose()
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else:
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# when in images tab
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for div in self.soup.find_all(
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'div',
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attrs={'class': f'{GClasses.images_tbm_tab}'}
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):
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_ = div.decompose()
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def collapse_sections(self) -> None:
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"""Collapses long result sections ("people also asked", "related
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searches", etc) into "details" elements
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These sections are typically the only sections in the results page that
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have more than ~5 child divs within a primary result div.
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Returns:
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None (The soup object is modified directly)
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"""
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minimal_mode = read_config_bool('WHOOGLE_MINIMAL')
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def pull_child_divs(result_div: BeautifulSoup):
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try:
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return result_div.findChildren(
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'div', recursive=False
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)[0].findChildren(
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'div', recursive=False)
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except IndexError:
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return []
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if not self.main_divs:
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return
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# Loop through results and check for the number of child divs in each
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for result in self.main_divs.find_all():
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result_children = pull_child_divs(result)
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if minimal_mode:
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if any(f">{x}</span" in str(s) for s in result_children
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for x in minimal_mode_sections):
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result.decompose()
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continue
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for s in result_children:
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if ('Twitter ›' in str(s)):
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result.decompose()
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continue
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if len(result_children) < self.RESULT_CHILD_LIMIT:
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continue
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else:
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if len(result_children) < self.RESULT_CHILD_LIMIT:
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continue
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# Find and decompose the first element with an inner HTML text val.
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# This typically extracts the title of the section (i.e. "Related
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# Searches", "People also ask", etc)
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# If there are more than one child tags with text
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# parenthesize the rest except the first
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label = 'Collapsed Results'
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subtitle = None
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for elem in result_children:
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if elem.text:
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content = list(elem.strings)
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label = content[0]
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if len(content) > 1:
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subtitle = '<span> (' + \
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''.join(content[1:]) + ')</span>'
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elem.decompose()
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break
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# Create the new details element to wrap around the result's
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# first parent
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parent = None
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idx = 0
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while not parent and idx < len(result_children):
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parent = result_children[idx].parent
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idx += 1
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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 = label
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if subtitle:
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soup = BeautifulSoup(subtitle, 'html.parser')
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summary.append(soup)
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details.append(summary)
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if parent and not minimal_mode:
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parent.wrap(details)
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elif parent and minimal_mode:
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# Remove parent element from document if "minimal mode" is
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# enabled
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parent.decompose()
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def update_element_src(self, element: Tag, mime: str, attr='src') -> None:
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"""Encrypts the original src of an element and rewrites the element src
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to use the "/element?src=" pass-through.
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Returns:
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None (The soup element is modified directly)
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"""
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src = element[attr].split(' ')[0]
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if src.startswith('//'):
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src = 'https:' + src
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elif src.startswith('data:'):
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return
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if src.startswith(LOGO_URL):
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# Re-brand with Whoogle logo
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element.replace_with(BeautifulSoup(
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render_template('logo.html'),
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features='html.parser'))
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return
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elif src.startswith(G_M_LOGO_URL):
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# Re-brand with single-letter Whoogle logo
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element['src'] = 'static/img/favicon/apple-icon.png'
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element.parent['href'] = 'home'
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return
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elif src.startswith(GOOG_IMG) or GOOG_STATIC in src:
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element['src'] = BLANK_B64
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return
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element[attr] = f'{self.root_url}/{Endpoint.element}?url=' + (
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self.encrypt_path(
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src,
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is_element=True
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) + '&type=' + urlparse.quote(mime)
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)
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def update_css(self) -> None:
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"""Updates URLs used in inline styles to be proxied by Whoogle
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using the /element endpoint.
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Returns:
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None (The soup element is modified directly)
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"""
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# Filter all <style> tags
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for style in self.soup.find_all('style'):
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style.string = clean_css(style.string, self.page_url)
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# TODO: Convert remote stylesheets to style tags and proxy all
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# remote requests
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# for link in soup.find_all('link', attrs={'rel': 'stylesheet'}):
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# print(link)
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def update_styling(self) -> None:
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# Update CSS classes for result divs
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soup = GClasses.replace_css_classes(self.soup)
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# Remove unnecessary button(s)
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for button in self.soup.find_all('button'):
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button.decompose()
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# Remove svg logos
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for svg in self.soup.find_all('svg'):
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svg.decompose()
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# Update logo
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logo = self.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 = self.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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# Fix body max width on images tab
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style = self.soup.find('style')
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div = self.soup.find('div', attrs={
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'class': f'{GClasses.images_tbm_tab}'})
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if style and div and not self.mobile:
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css = style.string
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css_html_tag = (
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'html{'
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'font-family: Roboto, Helvetica Neue, Arial, sans-serif;'
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'font-size: 14px;'
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'line-height: 20px;'
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'text-size-adjust: 100%;'
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'word-wrap: break-word;'
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'}'
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)
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css = f"{css_html_tag}{css}"
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css = re.sub('body{(.*?)}',
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'body{padding:0 8px;margin:0 auto;max-width:736px;}',
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css)
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style.string = css
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def update_link(self, link: Tag) -> None:
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"""Update internal link paths with encrypted path, otherwise remove
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unnecessary redirects and/or marketing params from the url
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Args:
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link: A bs4 Tag element to inspect and update
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Returns:
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None (the tag is updated directly)
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"""
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parsed_link = urlparse.urlparse(link['href'])
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if '/url?q=' in link['href']:
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link_netloc = extract_q(parsed_link.query, link['href'])
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else:
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link_netloc = parsed_link.netloc
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# Remove any elements that direct to unsupported Google pages
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if any(url in link_netloc for url in unsupported_g_pages):
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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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# Replaces the /url google unsupported link to the direct url
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link['href'] = link_netloc
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parent = link.parent
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if 'google.com/preferences?hl=' in link_netloc:
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# Handle case where a search is performed in a different
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# language than what is configured. This usually returns a
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# div with the same classes as normal search results, but with
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# a link to configure language preferences through Google.
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# Since we want all language config done through Whoogle, we
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# can safely decompose this element.
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while parent:
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p_cls = parent.attrs.get('class') or []
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if f'{GClasses.result_class_a}' in p_cls:
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parent.decompose()
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break
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parent = parent.parent
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else:
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# Remove cases where google links appear in the footer
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while parent:
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p_cls = parent.attrs.get('class') or []
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if parent.name == 'footer' or f'{GClasses.footer}' in p_cls:
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link.decompose()
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parent = parent.parent
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return
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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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result_link = urlparse.urlparse(href)
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q = extract_q(result_link.query, href)
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if q.startswith('/') and q not in self.query and 'spell=1' not in href:
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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' + q
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elif q.startswith('https://accounts.google.com'):
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# Remove Sign-in link
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link.decompose()
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return
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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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q = '"' + q + '"'
|
||
new_search = 'search?q=' + self.encrypt_path(q)
|
||
|
||
query_params = parse_qs(urlparse.urlparse(href).query)
|
||
for param in VALID_PARAMS:
|
||
if param not in query_params:
|
||
continue
|
||
param_val = query_params[param][0]
|
||
new_search += '&' + param + '=' + param_val
|
||
link['href'] = new_search
|
||
elif 'url?q=' in href:
|
||
# Strip unneeded arguments
|
||
link['href'] = filter_link_args(q)
|
||
|
||
# Add alternate viewing options for results,
|
||
# if the result doesn't already have an AV link
|
||
netloc = urlparse.urlparse(link['href']).netloc
|
||
if self.config.anon_view and netloc not in self._av:
|
||
self._av.add(netloc)
|
||
append_anon_view(link, self.config)
|
||
|
||
else:
|
||
if href.startswith(MAPS_URL):
|
||
# Maps links don't work if a site filter is applied
|
||
link['href'] = build_map_url(link['href'])
|
||
elif (href.startswith('/?') or href.startswith('/search?') or
|
||
href.startswith('/imgres?')):
|
||
# make sure that tags can be clicked as relative URLs
|
||
link['href'] = href[1:]
|
||
elif href.startswith('/intl/'):
|
||
# do nothing, keep original URL for ToS
|
||
pass
|
||
elif href.startswith('/preferences'):
|
||
# there is no config specific URL, remove this
|
||
link.decompose()
|
||
return
|
||
else:
|
||
link['href'] = href
|
||
|
||
if self.config.new_tab and (
|
||
link["href"].startswith("http")
|
||
or link["href"].startswith("imgres?")
|
||
):
|
||
link["target"] = "_blank"
|
||
|
||
def site_alt_swap(self) -> None:
|
||
"""Replaces link locations and page elements if "alts" config
|
||
is enabled
|
||
"""
|
||
for site, alt in SITE_ALTS.items():
|
||
for div in self.soup.find_all('div', text=re.compile(site)):
|
||
# Use the number of words in the div string to determine if the
|
||
# string is a result description (shouldn't replace domains used
|
||
# in desc text).
|
||
# Also ignore medium.com replacements since these are handled
|
||
# specifically in the link description replacement, and medium
|
||
# results are never given their own "card" result where this
|
||
# replacement would make sense.
|
||
if site == 'medium.com' or len(div.string.split(' ')) > 1:
|
||
continue
|
||
|
||
div.string = div.string.replace(site, alt)
|
||
|
||
for link in self.soup.find_all('a', href=True):
|
||
# 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:
|
||
continue
|
||
|
||
# Replace link description
|
||
link_desc = link_desc[0]
|
||
if site not in link_desc or not alt:
|
||
continue
|
||
|
||
new_desc = BeautifulSoup(features='html.parser').new_tag('div')
|
||
link_str = str(link_desc)
|
||
|
||
# Medium links should be handled differently, since 'medium.com'
|
||
# is a common substring of domain names, but shouldn't be
|
||
# replaced (i.e. 'philomedium.com' should stay as it is).
|
||
if 'medium.com' in link_str:
|
||
if link_str.startswith('medium.com') or '.medium.com' in link_str:
|
||
link_str = 'farside.link/scribe' + link_str[
|
||
link_str.find('medium.com') + len('medium.com'):]
|
||
new_desc.string = link_str
|
||
else:
|
||
new_desc.string = link_str.replace(site, alt)
|
||
|
||
link_desc.replace_with(new_desc)
|
||
|
||
def view_image(self, soup) -> BeautifulSoup:
|
||
"""Replaces the soup with a new one that handles mobile results and
|
||
adds the link of the image full res to the results.
|
||
|
||
Args:
|
||
soup: A BeautifulSoup object containing the image mobile results.
|
||
|
||
Returns:
|
||
BeautifulSoup: The new BeautifulSoup object
|
||
"""
|
||
|
||
# get some tags that are unchanged between mobile and pc versions
|
||
cor_suggested = soup.find_all('table', attrs={'class': "By0U9"})
|
||
next_pages = soup.find('table', attrs={'class': "uZgmoc"})
|
||
|
||
results = []
|
||
# find results div
|
||
results_div = soup.find('div', attrs={'class': "nQvrDb"})
|
||
# find all the results (if any)
|
||
results_all = []
|
||
if results_div:
|
||
results_all = results_div.find_all('div', attrs={'class': "lIMUZd"})
|
||
|
||
for item in results_all:
|
||
urls = item.find('a')['href'].split('&imgrefurl=')
|
||
|
||
# Skip urls that are not two-element lists
|
||
if len(urls) != 2:
|
||
continue
|
||
|
||
img_url = urlparse.unquote(urls[0].replace(
|
||
f'/{Endpoint.imgres}?imgurl=', ''))
|
||
|
||
try:
|
||
# Try to strip out only the necessary part of the web page link
|
||
web_page = urlparse.unquote(urls[1].split('&')[0])
|
||
except IndexError:
|
||
web_page = urlparse.unquote(urls[1])
|
||
|
||
img_tbn = urlparse.unquote(item.find('a').find('img')['src'])
|
||
|
||
results.append({
|
||
'domain': urlparse.urlparse(web_page).netloc,
|
||
'img_url': img_url,
|
||
'web_page': web_page,
|
||
'img_tbn': img_tbn
|
||
})
|
||
|
||
soup = BeautifulSoup(render_template('imageresults.html',
|
||
length=len(results),
|
||
results=results,
|
||
view_label="View Image"),
|
||
features='html.parser')
|
||
|
||
# replace correction suggested by google object if exists
|
||
if len(cor_suggested):
|
||
soup.find_all(
|
||
'table',
|
||
attrs={'class': "By0U9"}
|
||
)[0].replaceWith(cor_suggested[0])
|
||
# replace next page object at the bottom of the page
|
||
soup.find_all('table',
|
||
attrs={'class': "uZgmoc"})[0].replaceWith(next_pages)
|
||
return soup
|