searxng/searx/engines/google_news.py
Markus Heiser 9328c66e93 [fix] google news - send CONSENT Cookie to not be redirected
In the EU there exists a "General Data Protection Regulation" [1] aka GDPR (BTW:
very user friendly!) which requires consent to tracking.  To get the consent
from the user, google-news requests are redirected to confirm and get a CONSENT
Cookie from https://consent.google.de/s?continue=...

This patch adds a CONSENT Cookie to the google-news request to avoid
redirection.

The behavior of the CONTENTS cookies over all google engines seems similar but
the pattern is not yet fully clear to me, here are some random samples from my
analysis ..

Using common google search from different domains::

    google.com:        CONSENT=YES+cb.{{date}}-14-p0.de+FX+816
    google.de:         CONSENT=YES+cb.{{date}}-14-p0.de+FX+333
    google.fr:         CONSENT=YES+srp.gws-{{date}}-0-RC2.fr+FX+826

When searching about videos (google-videos)::

    google.es:         CONSENT=YES+srp.gws-{{date}}-0-RC2.es+FX+076
    google.de:         CONSENT=YES+srp.gws-{{date}}-0-RC2.de+FX+171

Google news has only one domain for all languages::

    news.google.com:   CONSENT=YES+cb.{{date}}-14-p0.de+FX+816

Using google-scholar search from different domains::

    scholar.google.de: CONSENT=YES+cb.{{date}}-14-p0.de+FX+333
    scholar.google.fr: does not use such a cookie / did not ask the user
    scholar.google.es: does not use such a cookie / did not ask the user

Interim summary:

  Pattern is unclear and I won't apply the CONSENT cookie to all google engines.
  More experience is need before we generalize the CONSENT cookies over all
  google engines.

Related:

- e9a6ab401 [fix] youtube - send CONSENT Cookie to not be redirected
- https://github.com/benbusby/whoogle-search/issues/311
- https://github.com/benbusby/whoogle-search/issues/243

[1] https://en.wikipedia.org/wiki/General_Data_Protection_Regulation
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
2021-06-18 13:21:20 +02:00

198 lines
6.3 KiB
Python

# SPDX-License-Identifier: AGPL-3.0-or-later
# lint: pylint
"""Google (News)
For detailed description of the *REST-full* API see: `Query Parameter
Definitions`_. Not all parameters can be appied:
- num_ : the number of search results is ignored
- save_ : is ignored / Google-News results are always *SafeSearch*
.. _Query Parameter Definitions:
https://developers.google.com/custom-search/docs/xml_results#WebSearch_Query_Parameter_Definitions
.. _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, missing-function-docstring
import binascii
from datetime import datetime
import re
from urllib.parse import urlencode
from base64 import b64decode
from lxml import html
from searx import logger
from searx.utils import (
eval_xpath,
eval_xpath_list,
eval_xpath_getindex,
extract_text,
)
# pylint: disable=unused-import
from searx.engines.google import (
supported_languages_url,
_fetch_supported_languages,
)
# pylint: enable=unused-import
from searx.engines.google import (
get_lang_info,
detect_google_sorry,
)
# about
about = {
"website": 'https://news.google.com',
"wikidata_id": 'Q12020',
"official_api_documentation": 'https://developers.google.com/custom-search',
"use_official_api": False,
"require_api_key": False,
"results": 'HTML',
}
logger = logger.getChild('google news')
# 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
# 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
def request(query, params):
"""Google-News search request"""
lang_info = get_lang_info(
# pylint: disable=undefined-variable
params, supported_languages, language_aliases, False
)
logger.debug(
"HTTP header Accept-Language --> %s", lang_info['headers']['Accept-Language'])
# google news has only one domain
lang_info['subdomain'] = 'news.google.com'
ceid = "%s:%s" % (lang_info['country'], lang_info['language'])
# google news redirects en to en-US
if lang_info['params']['hl'] == 'en':
lang_info['params']['hl'] = 'en-US'
# 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']]
query_url = 'https://' + lang_info['subdomain'] + '/search' + "?" + urlencode({
'q': query,
**lang_info['params'],
'ie': "utf8",
'oe': "utf8",
'gl': lang_info['country'],
}) + ('&ceid=%s' % ceid) # ceid includes a ':' character which must not be urlencoded
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'
)
params['headers']['Cookie'] = "CONSENT=YES+cb.%s-14-p0.en+F+941;" % datetime.now().strftime("%Y%m%d")
return params
def response(resp):
"""Get response from google's search request"""
results = []
detect_google_sorry(resp)
# convert the text to dom
dom = html.fromstring(resp.text)
for result in eval_xpath_list(dom, '//div[@class="xrnccd"]'):
# The first <a> tag in the <article> contains the link to the
# article The href attribute of the <a> is a google internal link,
# we can't use. The real link is hidden in the jslog attribute:
#
# <a ...
# jslog="95014; 4:https://www.cnn.com/.../index.html; track:click"
# href="./articles/CAIiENu3nGS...?hl=en-US&amp;gl=US&amp;ceid=US%3Aen"
# ... />
jslog = eval_xpath_getindex(result, './article/a/@jslog', 0)
url = re.findall('http[^;]*', jslog)
if url:
url = url[0]
else:
# The real URL is base64 encoded in the json attribute:
# jslog="95014; 5:W251bGwsbnVsbCxudW...giXQ==; track:click"
jslog = jslog.split(";")[1].split(':')[1].strip()
try:
padding = (4 -(len(jslog) % 4)) * "="
jslog = b64decode(jslog + padding)
except binascii.Error:
# URL cant be read, skip this result
continue
# now we have : b'[null, ... null,"https://www.cnn.com/.../index.html"]'
url = re.findall('http[^;"]*', str(jslog))[0]
# the first <h3> tag in the <article> contains the title of the link
title = extract_text(eval_xpath(result, './article/h3[1]'))
# the first <div> tag in the <article> contains the content of the link
content = extract_text(eval_xpath(result, './article/div[1]'))
# the second <div> tag contains origin publisher and the publishing date
pub_date = extract_text(eval_xpath(result, './article/div[2]//time'))
pub_origin = extract_text(eval_xpath(result, './article/div[2]//a'))
pub_info = []
if pub_origin:
pub_info.append(pub_origin)
if pub_date:
# The pub_date is mostly a string like 'yesertday', not a real
# timezone date or time. Therefore we can't use publishedDate.
pub_info.append(pub_date)
pub_info = ', '.join(pub_info)
if pub_info:
content = pub_info + ': ' + content
# The image URL is located in a preceding sibling <img> tag, e.g.:
# "https://lh3.googleusercontent.com/DjhQh7DMszk.....z=-p-h100-w100"
# These URL are long but not personalized (double checked via tor).
img_src = extract_text(result.xpath('preceding-sibling::a/figure/img/@src'))
results.append({
'url': url,
'title': title,
'content': content,
'img_src': img_src,
})
# return results
return results