mirror of https://github.com/searxng/searxng.git
376 lines
12 KiB
Python
376 lines
12 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
|
|
# lint: pylint
|
|
"""Google (Web)
|
|
|
|
For detailed description of the *REST-full* API see: `Query Parameter
|
|
Definitions`_.
|
|
|
|
.. _Query Parameter Definitions:
|
|
https://developers.google.com/custom-search/docs/xml_results#WebSearch_Query_Parameter_Definitions
|
|
"""
|
|
|
|
# pylint: disable=invalid-name, missing-function-docstring
|
|
|
|
from urllib.parse import urlencode
|
|
from lxml import html
|
|
from searx import logger
|
|
from searx.utils import match_language, extract_text, eval_xpath, eval_xpath_list, eval_xpath_getindex
|
|
from searx.exceptions import SearxEngineCaptchaException
|
|
|
|
logger = logger.getChild('google engine')
|
|
|
|
# about
|
|
about = {
|
|
"website": 'https://www.google.com',
|
|
"wikidata_id": 'Q9366',
|
|
"official_api_documentation": 'https://developers.google.com/custom-search/',
|
|
"use_official_api": False,
|
|
"require_api_key": False,
|
|
"results": 'HTML',
|
|
}
|
|
|
|
# engine dependent config
|
|
categories = ['general']
|
|
paging = True
|
|
time_range_support = True
|
|
safesearch = True
|
|
supported_languages_url = 'https://www.google.com/preferences?#languages'
|
|
|
|
# based on https://en.wikipedia.org/wiki/List_of_Google_domains and tests
|
|
google_domains = {
|
|
'BG': 'google.bg', # Bulgaria
|
|
'CZ': 'google.cz', # Czech Republic
|
|
'DE': 'google.de', # Germany
|
|
'DK': 'google.dk', # Denmark
|
|
'AT': 'google.at', # Austria
|
|
'CH': 'google.ch', # Switzerland
|
|
'GR': 'google.gr', # Greece
|
|
'AU': 'google.com.au', # Australia
|
|
'CA': 'google.ca', # Canada
|
|
'GB': 'google.co.uk', # United Kingdom
|
|
'ID': 'google.co.id', # Indonesia
|
|
'IE': 'google.ie', # Ireland
|
|
'IN': 'google.co.in', # India
|
|
'MY': 'google.com.my', # Malaysia
|
|
'NZ': 'google.co.nz', # New Zealand
|
|
'PH': 'google.com.ph', # Philippines
|
|
'SG': 'google.com.sg', # Singapore
|
|
'US': 'google.com', # United States (google.us) redirects to .com
|
|
'ZA': 'google.co.za', # South Africa
|
|
'AR': 'google.com.ar', # Argentina
|
|
'CL': 'google.cl', # Chile
|
|
'ES': 'google.es', # Spain
|
|
'MX': 'google.com.mx', # Mexico
|
|
'EE': 'google.ee', # Estonia
|
|
'FI': 'google.fi', # Finland
|
|
'BE': 'google.be', # Belgium
|
|
'FR': 'google.fr', # France
|
|
'IL': 'google.co.il', # Israel
|
|
'HR': 'google.hr', # Croatia
|
|
'HU': 'google.hu', # Hungary
|
|
'IT': 'google.it', # Italy
|
|
'JP': 'google.co.jp', # Japan
|
|
'KR': 'google.co.kr', # South Korea
|
|
'LT': 'google.lt', # Lithuania
|
|
'LV': 'google.lv', # Latvia
|
|
'NO': 'google.no', # Norway
|
|
'NL': 'google.nl', # Netherlands
|
|
'PL': 'google.pl', # Poland
|
|
'BR': 'google.com.br', # Brazil
|
|
'PT': 'google.pt', # Portugal
|
|
'RO': 'google.ro', # Romania
|
|
'RU': 'google.ru', # Russia
|
|
'SK': 'google.sk', # Slovakia
|
|
'SI': 'google.si', # Slovenia
|
|
'SE': 'google.se', # Sweden
|
|
'TH': 'google.co.th', # Thailand
|
|
'TR': 'google.com.tr', # Turkey
|
|
'UA': 'google.com.ua', # Ukraine
|
|
'CN': 'google.com.hk', # There is no google.cn, we use .com.hk for zh-CN
|
|
'HK': 'google.com.hk', # Hong Kong
|
|
'TW': 'google.com.tw' # Taiwan
|
|
}
|
|
|
|
time_range_dict = {
|
|
'day': 'd',
|
|
'week': 'w',
|
|
'month': 'm',
|
|
'year': 'y'
|
|
}
|
|
|
|
# Filter results. 0: None, 1: Moderate, 2: Strict
|
|
filter_mapping = {
|
|
0: 'off',
|
|
1: 'medium',
|
|
2: 'high'
|
|
}
|
|
|
|
# specific xpath variables
|
|
# ------------------------
|
|
|
|
# google results are grouped into <div class="g" ../>
|
|
results_xpath = '//div[@class="g"]'
|
|
|
|
# google *sections* are no usual *results*, we ignore them
|
|
g_section_with_header = './g-section-with-header'
|
|
|
|
# the title is a h3 tag relative to the result group
|
|
title_xpath = './/h3[1]'
|
|
|
|
# in the result group there is <div class="yuRUbf" ../> it's first child is a <a
|
|
# href=...>
|
|
href_xpath = './/div[@class="yuRUbf"]//a/@href'
|
|
|
|
# in the result group there is <div class="IsZvec" ../> containing he *content*
|
|
content_xpath = './/div[@class="IsZvec"]'
|
|
|
|
# Suggestions are links placed in a *card-section*, we extract only the text
|
|
# from the links not the links itself.
|
|
suggestion_xpath = '//div[contains(@class, "card-section")]//a'
|
|
|
|
# Since google does *auto-correction* on the first query these are not really
|
|
# *spelling suggestions*, we use them anyway.
|
|
spelling_suggestion_xpath = '//div[@class="med"]/p/a'
|
|
|
|
|
|
def get_lang_info(params, lang_list, custom_aliases, supported_any_language):
|
|
"""Composing various language properties for the google engines.
|
|
|
|
This function is called by the various google engines (google itself,
|
|
google-images, -news, -scholar, -videos).
|
|
|
|
:param dict param: request parameters of the engine
|
|
|
|
:param list lang_list: list of supported languages of the engine
|
|
:py:obj:`ENGINES_LANGUAGES[engine-name] <searx.data.ENGINES_LANGUAGES>`
|
|
|
|
:param dict lang_list: custom aliases for non standard language codes
|
|
(used when calling :py:func:`searx.utils.match_language)
|
|
|
|
:param bool supported_any_language: When a language is not specified, the
|
|
language interpretation is left up to Google to decide how the search
|
|
results should be delivered. This argument is ``True`` for the google
|
|
engine and ``False`` for the other engines (google-images, -news,
|
|
-scholar, -videos).
|
|
|
|
:rtype: dict
|
|
:returns:
|
|
Py-Dictionary with the key/value pairs:
|
|
|
|
language:
|
|
Return value from :py:func:`searx.utils.match_language
|
|
|
|
country:
|
|
The country code (e.g. US, AT, CA, FR, DE ..)
|
|
|
|
subdomain:
|
|
Google subdomain :py:obj:`google_domains` that fits to the country
|
|
code.
|
|
|
|
params:
|
|
Py-Dictionary with additional request arguments (can be passed to
|
|
:py:func:`urllib.parse.urlencode`).
|
|
|
|
headers:
|
|
Py-Dictionary with additional HTTP headers (can be passed to
|
|
request's headers)
|
|
"""
|
|
ret_val = {
|
|
'language' : None,
|
|
'country' : None,
|
|
'subdomain' : None,
|
|
'params' : {},
|
|
'headers' : {},
|
|
}
|
|
|
|
# language ...
|
|
|
|
_lang = params['language']
|
|
_any_language = _lang.lower() == 'all'
|
|
if _any_language:
|
|
_lang = 'en-US'
|
|
language = match_language(_lang, lang_list, custom_aliases)
|
|
ret_val['language'] = language
|
|
|
|
# country ...
|
|
|
|
_l = _lang.split('-')
|
|
if len(_l) == 2:
|
|
country = _l[1]
|
|
else:
|
|
country = _l[0].upper()
|
|
if country == 'EN':
|
|
country = 'US'
|
|
ret_val['country'] = country
|
|
|
|
# subdomain ...
|
|
|
|
ret_val['subdomain'] = 'www.' + google_domains.get(country.upper(), 'google.com')
|
|
|
|
# params & headers
|
|
|
|
lang_country = '%s-%s' % (language, country) # (en-US, en-EN, de-DE, de-AU, fr-FR ..)
|
|
|
|
# hl parameter:
|
|
# https://developers.google.com/custom-search/docs/xml_results#hlsp The
|
|
# Interface Language:
|
|
# https://developers.google.com/custom-search/docs/xml_results_appendices#interfaceLanguages
|
|
|
|
ret_val['params']['hl'] = lang_list.get(lang_country, language)
|
|
|
|
# lr parameter:
|
|
# The lr (language restrict) parameter restricts search results to
|
|
# documents written in a particular language.
|
|
# https://developers.google.com/custom-search/docs/xml_results#lrsp
|
|
# Language Collection Values:
|
|
# https://developers.google.com/custom-search/docs/xml_results_appendices#languageCollections
|
|
|
|
if _any_language and supported_any_language:
|
|
|
|
# interpretation is left up to Google (based on whoogle)
|
|
#
|
|
# - add parameter ``source=lnt``
|
|
# - don't use parameter ``lr``
|
|
# - don't add a ``Accept-Language`` HTTP header.
|
|
|
|
ret_val['params']['source'] = 'lnt'
|
|
|
|
else:
|
|
|
|
# restricts search results to documents written in a particular
|
|
# language.
|
|
ret_val['params']['lr'] = "lang_" + lang_list.get(lang_country, language)
|
|
|
|
# Accept-Language: fr-CH, fr;q=0.8, en;q=0.6, *;q=0.5
|
|
ret_val['headers']['Accept-Language'] = ','.join([
|
|
lang_country,
|
|
language + ';q=0.8,',
|
|
'en;q=0.6',
|
|
'*;q=0.5',
|
|
])
|
|
|
|
return ret_val
|
|
|
|
def detect_google_sorry(resp):
|
|
if resp.url.host == 'sorry.google.com' or resp.url.path.startswith('/sorry'):
|
|
raise SearxEngineCaptchaException()
|
|
|
|
|
|
def request(query, params):
|
|
"""Google search request"""
|
|
|
|
offset = (params['pageno'] - 1) * 10
|
|
|
|
lang_info = get_lang_info(
|
|
# pylint: disable=undefined-variable
|
|
params, supported_languages, language_aliases, True
|
|
)
|
|
|
|
# https://www.google.de/search?q=corona&hl=de&lr=lang_de&start=0&tbs=qdr%3Ad&safe=medium
|
|
query_url = 'https://' + lang_info['subdomain'] + '/search' + "?" + urlencode({
|
|
'q': query,
|
|
**lang_info['params'],
|
|
'ie': "utf8",
|
|
'oe': "utf8",
|
|
'start': offset,
|
|
})
|
|
|
|
if params['time_range'] in time_range_dict:
|
|
query_url += '&' + urlencode({'tbs': 'qdr:' + time_range_dict[params['time_range']]})
|
|
if params['safesearch']:
|
|
query_url += '&' + urlencode({'safe': filter_mapping[params['safesearch']]})
|
|
params['url'] = query_url
|
|
|
|
params['headers'].update(lang_info['headers'])
|
|
params['headers']['Accept'] = (
|
|
'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8'
|
|
)
|
|
|
|
return params
|
|
|
|
|
|
def response(resp):
|
|
"""Get response from google's search request"""
|
|
|
|
detect_google_sorry(resp)
|
|
|
|
results = []
|
|
|
|
# convert the text to dom
|
|
dom = html.fromstring(resp.text)
|
|
|
|
# results --> answer
|
|
answer = eval_xpath(dom, '//div[contains(@class, "LGOjhe")]//text()')
|
|
if answer:
|
|
results.append({'answer': ' '.join(answer)})
|
|
else:
|
|
logger.debug("did not find 'answer'")
|
|
|
|
# results --> number_of_results
|
|
try:
|
|
_txt = eval_xpath_getindex(dom, '//div[@id="result-stats"]//text()', 0)
|
|
_digit = ''.join([n for n in _txt if n.isdigit()])
|
|
number_of_results = int(_digit)
|
|
results.append({'number_of_results': number_of_results})
|
|
except Exception as e: # pylint: disable=broad-except
|
|
logger.debug("did not 'number_of_results'")
|
|
logger.error(e, exc_info=True)
|
|
|
|
# parse results
|
|
for result in eval_xpath_list(dom, results_xpath):
|
|
|
|
# google *sections*
|
|
if extract_text(eval_xpath(result, g_section_with_header)):
|
|
logger.debug("ingoring <g-section-with-header>")
|
|
continue
|
|
|
|
try:
|
|
title_tag = eval_xpath_getindex(result, title_xpath, 0, default=None)
|
|
if title_tag is None:
|
|
# this not one of the common google results *section*
|
|
logger.debug('ingoring <div class="g" ../> section: missing title')
|
|
continue
|
|
title = extract_text(title_tag)
|
|
url = eval_xpath_getindex(result, href_xpath, 0, None)
|
|
if url is None:
|
|
continue
|
|
content = extract_text(eval_xpath_getindex(result, content_xpath, 0, default=None), allow_none=True)
|
|
results.append({
|
|
'url': url,
|
|
'title': title,
|
|
'content': content
|
|
})
|
|
except Exception as e: # pylint: disable=broad-except
|
|
logger.error(e, exc_info=True)
|
|
# from lxml import etree
|
|
# logger.debug(etree.tostring(result, pretty_print=True))
|
|
# import pdb
|
|
# pdb.set_trace()
|
|
continue
|
|
|
|
# parse suggestion
|
|
for suggestion in eval_xpath_list(dom, suggestion_xpath):
|
|
# append suggestion
|
|
results.append({'suggestion': extract_text(suggestion)})
|
|
|
|
for correction in eval_xpath_list(dom, spelling_suggestion_xpath):
|
|
results.append({'correction': extract_text(correction)})
|
|
|
|
# return results
|
|
return results
|
|
|
|
|
|
# get supported languages from their site
|
|
def _fetch_supported_languages(resp):
|
|
ret_val = {}
|
|
dom = html.fromstring(resp.text)
|
|
|
|
radio_buttons = eval_xpath_list(dom, '//*[@id="langSec"]//input[@name="lr"]')
|
|
|
|
for x in radio_buttons:
|
|
name = x.get("data-name")
|
|
code = x.get("value").split('_')[-1]
|
|
ret_val[code] = {"name": name}
|
|
|
|
return ret_val
|