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[mod] Google: reversed engineered & upgrade to data_type: traits_v1

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Partial reverse engineering of the Google engines including a improved language
and region handling based on the engine.traits_v1 data.

When ever possible the implementations of the Google engines try to make use of
the async REST APIs.  The get_lang_info() has been generalized to a
get_google_info() function / especially the region handling has been improved by
adding the cr parameter.

searx/data/engine_traits.json
  Add data type "traits_v1" generated by the fetch_traits() functions from:

  - Google (WEB),
  - Google images,
  - Google news,
  - Google scholar and
  - Google videos

  and remove data from obsolete data type "supported_languages".

  A traits.custom type that maps region codes to *supported_domains* is fetched
  from https://www.google.com/supported_domains

searx/autocomplete.py:
  Reversed engineered autocomplete from Google WEB.  Supports Google's languages and
  subdomains.  The old API suggestqueries.google.com/complete has been replaced
  by the async REST API: https://{subdomain}/complete/search?{args}

searx/engines/google.py
  Reverse engineering and extensive testing ..
  - fetch_traits():  Fetch languages & regions from Google properties.
  - always use the async REST API (formally known as 'use_mobile_ui')
  - use *supported_domains* from traits
  - improved the result list by fetching './/div[@data-content-feature]'
    and parsing the type of the various *content features* --> thumbnails are
    added

searx/engines/google_images.py
  Reverse engineering and extensive testing ..
  - fetch_traits():  Fetch languages & regions from Google properties.
  - use *supported_domains* from traits
  - if exists, freshness_date is added to the result
  - issue 1864: result list has been improved a lot (due to the new cr parameter)

searx/engines/google_news.py
  Reverse engineering and extensive testing ..
  - fetch_traits():  Fetch languages & regions from Google properties.
    *supported_domains* is not needed but a ceid list has been added.
  - different region handling compared to Google WEB
  - fixed for various languages & regions (due to the new ceid parameter) /
    avoid CONSENT page
  - Google News do no longer support time range
  - result list has been fixed: XPath of pub_date and pub_origin

searx/engines/google_videos.py
  - fetch_traits():  Fetch languages & regions from Google properties.
  - use *supported_domains* from traits
  - add paging support
  - implement a async request ('asearch': 'arc' & 'async':
    'use_ac:true,_fmt:html')
  - simplified code (thanks to '_fmt:html' request)
  - issue 1359: fixed xpath of video length data

searx/engines/google_scholar.py
  - fetch_traits():  Fetch languages & regions from Google properties.
  - use *supported_domains* from traits
  - request(): include patents & citations
  - response(): fixed CAPTCHA detection (Scholar has its own CATCHA manager)
  - hardening XPath to iterate over results
  - fixed XPath of pub_type (has been change from gs_ct1 to gs_cgt2 class)
  - issue 1769 fixed: new request implementation is no longer incompatible

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
This commit is contained in:
Markus Heiser 2022-12-04 22:57:22 +01:00
parent c80e82a855
commit 2499899554
11 changed files with 2510 additions and 2174 deletions
Download patch file Download diff file Expand all files Collapse all files

253
searx/engines/google_news.py
View file

@ -1,24 +1,40 @@
# SPDX-License-Identifier: AGPL-3.0-or-later
# lint: pylint
"""This is the implementation of the google news engine. The google news API
ignores some parameters from the common :ref:`google API`:
"""This is the implementation of the Google News engine.
- num_ : the number of search results is ignored
Google News has a different region handling compared to Google WEB.
- the ``ceid`` argument has to be set (:py:obj:`ceid_list`)
- the hl_ argument has to be set correctly (and different to Google WEB)
- the gl_ argument is mandatory
If one of this argument is not set correctly, the request is redirected to
CONSENT dialog::
https://consent.google.com/m?continue=
The google news API ignores some parameters from the common :ref:`google API`:
- num_ : the number of search results is ignored / there is no paging all
results for a query term are in the first response.
- save_ : is ignored / Google-News results are always *SafeSearch*
.. _hl: https://developers.google.com/custom-search/docs/xml_results#hlsp
.. _gl: https://developers.google.com/custom-search/docs/xml_results#glsp
.. _num: https://developers.google.com/custom-search/docs/xml_results#numsp
.. _save: https://developers.google.com/custom-search/docs/xml_results#safesp
"""
# pylint: disable=invalid-name
from typing import TYPE_CHECKING
import binascii
import re
from urllib.parse import urlencode
from base64 import b64decode
from lxml import html
import babel
from searx import locales
from searx.utils import (
eval_xpath,
eval_xpath_list,
@ -26,19 +42,19 @@ from searx.utils import (
extract_text,
)
# pylint: disable=unused-import
from searx.engines.google import fetch_traits as _fetch_traits # pylint: disable=unused-import
from searx.engines.google import (
fetch_traits,
supported_languages_url,
_fetch_supported_languages,
)
# pylint: enable=unused-import
from searx.engines.google import (
get_lang_info,
get_google_info,
detect_google_sorry,
)
from searx.enginelib.traits import EngineTraits
if TYPE_CHECKING:
import logging
logger: logging.Logger
traits: EngineTraits
# about
about = {
@ -50,70 +66,77 @@ about = {
"results": 'HTML',
}
# compared to other google engines google-news has a different time range
# support. The time range is included in the search term.
time_range_dict = {
'day': 'when:1d',
'week': 'when:7d',
'month': 'when:1m',
'year': 'when:1y',
}
# engine dependent config
categories = ['news']
paging = False
use_locale_domain = True
time_range_support = True
time_range_support = False
# Google-News results are always *SafeSearch*. Option 'safesearch' is set to
# False here, otherwise checker will report safesearch-errors::
#
# safesearch : results are identitical for safesearch=0 and safesearch=2
safesearch = False
send_accept_language_header = True
safesearch = True
# send_accept_language_header = True
def request(query, params):
"""Google-News search request"""
lang_info = get_lang_info(params, supported_languages, language_aliases, False)
sxng_locale = params.get('searxng_locale', 'en-US')
ceid = locales.get_engine_locale(sxng_locale, traits.custom['ceid'], default='US:en')
google_info = get_google_info(params, traits)
google_info['subdomain'] = 'news.google.com' # google news has only one domain
# google news has only one domain
lang_info['subdomain'] = 'news.google.com'
ceid_region, ceid_lang = ceid.split(':')
ceid_lang, ceid_suffix = (
ceid_lang.split('-')
+ [
None,
]
)[:2]
ceid = "%s:%s" % (lang_info['country'], lang_info['language'])
google_info['params']['hl'] = ceid_lang
# google news redirects en to en-US
if lang_info['params']['hl'] == 'en':
lang_info['params']['hl'] = 'en-US'
if ceid_suffix and ceid_suffix not in ['Hans', 'Hant']:
# Very special to google-news compared to other google engines, the time
# range is included in the search term.
if params['time_range']:
query += ' ' + time_range_dict[params['time_range']]
if ceid_region.lower() == ceid_lang:
google_info['params']['hl'] = ceid_lang + '-' + ceid_region
else:
google_info['params']['hl'] = ceid_lang + '-' + ceid_suffix
elif ceid_region.lower() != ceid_lang:
if ceid_region in ['AT', 'BE', 'CH', 'IL', 'SA', 'IN', 'BD', 'PT']:
google_info['params']['hl'] = ceid_lang
else:
google_info['params']['hl'] = ceid_lang + '-' + ceid_region
google_info['params']['lr'] = 'lang_' + ceid_lang.split('-')[0]
google_info['params']['gl'] = ceid_region
query_url = (
'https://'
+ lang_info['subdomain']
+ '/search'
+ "?"
+ urlencode({'q': query, **lang_info['params'], 'ie': "utf8", 'oe': "utf8", 'gl': lang_info['country']})
+ google_info['subdomain']
+ "/search?"
+ urlencode(
{
'q': query,
**google_info['params'],
}
)
# ceid includes a ':' character which must not be urlencoded
+ ('&ceid=%s' % ceid)
) # ceid includes a ':' character which must not be urlencoded
)
params['url'] = query_url
params['cookies']['CONSENT'] = "YES+"
params['headers'].update(lang_info['headers'])
params['headers']['Accept'] = 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8'
params['cookies'] = google_info['cookies']
params['headers'].update(google_info['headers'])
return params
def response(resp):
"""Get response from google's search request"""
results = []
detect_google_sorry(resp)
# convert the text to dom
@ -153,8 +176,8 @@ def response(resp):
# The pub_date is mostly a string like 'yesertday', not a real
# timezone date or time. Therefore we can't use publishedDate.
pub_date = extract_text(eval_xpath(result, './article/div[1]/div[1]/time'))
pub_origin = extract_text(eval_xpath(result, './article/div[1]/div[1]/a'))
pub_date = extract_text(eval_xpath(result, './article//time'))
pub_origin = extract_text(eval_xpath(result, './article//a[@data-n-tid]'))
content = ' / '.join([x for x in [pub_origin, pub_date] if x])
@ -175,3 +198,127 @@ def response(resp):
# return results
return results
ceid_list = [
'AE:ar',
'AR:es-419',
'AT:de',
'AU:en',
'BD:bn',
'BE:fr',
'BE:nl',
'BG:bg',
'BR:pt-419',
'BW:en',
'CA:en',
'CA:fr',
'CH:de',
'CH:fr',
'CL:es-419',
'CN:zh-Hans',
'CO:es-419',
'CU:es-419',
'CZ:cs',
'DE:de',
'EG:ar',
'ES:es',
'ET:en',
'FR:fr',
'GB:en',
'GH:en',
'GR:el',
'HK:zh-Hant',
'HU:hu',
'ID:en',
'ID:id',
'IE:en',
'IL:en',
'IL:he',
'IN:bn',
'IN:en',
'IN:hi',
'IN:ml',
'IN:mr',
'IN:ta',
'IN:te',
'IT:it',
'JP:ja',
'KE:en',
'KR:ko',
'LB:ar',
'LT:lt',
'LV:en',
'LV:lv',
'MA:fr',
'MX:es-419',
'MY:en',
'NA:en',
'NG:en',
'NL:nl',
'NO:no',
'NZ:en',
'PE:es-419',
'PH:en',
'PK:en',
'PL:pl',
'PT:pt-150',
'RO:ro',
'RS:sr',
'RU:ru',
'SA:ar',
'SE:sv',
'SG:en',
'SI:sl',
'SK:sk',
'SN:fr',
'TH:th',
'TR:tr',
'TW:zh-Hant',
'TZ:en',
'UA:ru',
'UA:uk',
'UG:en',
'US:en',
'US:es-419',
'VE:es-419',
'VN:vi',
'ZA:en',
'ZW:en',
]
"""List of region/language combinations supported by Google News. Values of the
``ceid`` argument of the Google News REST API."""
_skip_values = [
'ET:en', # english (ethiopia)
'ID:en', # english (indonesia)
'LV:en', # english (latvia)
]
_ceid_locale_map = {'NO:no': 'nb-NO'}
def fetch_traits(engine_traits: EngineTraits):
_fetch_traits(engine_traits, add_domains=False)
engine_traits.custom['ceid'] = {}
for ceid in ceid_list:
if ceid in _skip_values:
continue
region, lang = ceid.split(':')
x = lang.split('-')
if len(x) > 1:
if x[1] not in ['Hant', 'Hans']:
lang = x[0]
sxng_locale = _ceid_locale_map.get(ceid, lang + '-' + region)
try:
locale = babel.Locale.parse(sxng_locale, sep='-')
except babel.UnknownLocaleError:
print("ERROR: %s -> %s is unknown by babel" % (ceid, sxng_locale))
continue
engine_traits.custom['ceid'][locales.region_tag(locale)] = ceid