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[fix] Get an actual sc argument from startpage's home page.

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Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
This commit is contained in:
Markus Heiser 2022-01-06 18:29:04 +01:00
parent 1cbcddb3f7
commit 2f4e567e90
1 changed files with 38 additions and 1 deletions
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39
searx/engines/startpage.py
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@ -5,6 +5,7 @@
"""
import re
from time import time
from urllib.parse import urlencode
from unicodedata import normalize, combining
@ -15,6 +16,7 @@ from lxml import html
from babel import Locale
from babel.localedata import locale_identifiers
from searx import network
from searx.utils import extract_text, eval_xpath, match_language
# about
@ -47,6 +49,41 @@ results_xpath = '//div[@class="w-gl__result__main"]'
link_xpath = './/a[@class="w-gl__result-title result-link"]'
content_xpath = './/p[@class="w-gl__description"]'
# timestamp of the last fetch of 'sc' code
sc_code_ts = 0
sc_code = ''
def get_sc_code(headers):
"""Get an actual `sc` argument from startpage's home page.
Startpage puts a `sc` argument on every link. Without this argument
startpage considers the request is from a bot. We do not know what is
encoded in the value of the `sc` argument, but it seems to be a kind of a
*time-stamp*. This *time-stamp* is valid for a few hours.
This function scrap a new *time-stamp* from startpage's home page every hour
(3000 sec).
"""
global sc_code_ts, sc_code # pylint: disable=global-statement
if time() > (sc_code_ts + 3000):
logger.debug("query new sc time-stamp ...")
resp = network.get(base_url, headers=headers)
dom = html.fromstring(resp.text)
# href --> '/?sc=adrKJMgF8xwp20'
href = eval_xpath(dom, '//a[@class="footer-home__logo"]')[0].get('href')
sc_code = href[5:]
sc_code_ts = time()
logger.debug("new value is: %s", sc_code)
return sc_code
# do search-request
def request(query, params):
@ -56,7 +93,7 @@ def request(query, params):
'page': params['pageno'],
'cat': 'web',
# 'abp': "-1",
'sc': 'Mj4jZy61QETj20',
'sc': get_sc_code(params['headers']),
}
# set language if specified