mirror of
https://github.com/searxng/searxng
synced 2024-11-09 01:10:26 +00:00
e8706fb738
This patch fixes some quirks and issues related to the engines and the network. Each engine has its own network and this network was broken for the following engines[1]: - archlinux - bing - dailymotion - duckduckgo - google - peertube - startpage - wikipedia Since the files have been touched anyway, the type annotaions of the engine modules has also been completed so that error messages from the type checker are no longer reported. Related and (partial) fixed issue: - [1] https://github.com/searxng/searxng/issues/762#issuecomment-1605323861 - [2] https://github.com/searxng/searxng/issues/2513 - [3] https://github.com/searxng/searxng/issues/2515 Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
495 lines
16 KiB
Python
495 lines
16 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
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# lint: pylint
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"""Startpage's language & region selectors are a mess ..
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.. _startpage regions:
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Startpage regions
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=================
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In the list of regions there are tags we need to map to common region tags::
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pt-BR_BR --> pt_BR
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zh-CN_CN --> zh_Hans_CN
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zh-TW_TW --> zh_Hant_TW
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zh-TW_HK --> zh_Hant_HK
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en-GB_GB --> en_GB
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and there is at least one tag with a three letter language tag (ISO 639-2)::
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fil_PH --> fil_PH
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The locale code ``no_NO`` from Startpage does not exists and is mapped to
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``nb-NO``::
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babel.core.UnknownLocaleError: unknown locale 'no_NO'
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For reference see languages-subtag at iana; ``no`` is the macrolanguage [1]_ and
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W3C recommends subtag over macrolanguage [2]_.
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.. [1] `iana: language-subtag-registry
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<https://www.iana.org/assignments/language-subtag-registry/language-subtag-registry>`_ ::
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type: language
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Subtag: nb
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Description: Norwegian Bokmål
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Added: 2005-10-16
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Suppress-Script: Latn
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Macrolanguage: no
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.. [2]
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Use macrolanguages with care. Some language subtags have a Scope field set to
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macrolanguage, i.e. this primary language subtag encompasses a number of more
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specific primary language subtags in the registry. ... As we recommended for
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the collection subtags mentioned above, in most cases you should try to use
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the more specific subtags ... `W3: The primary language subtag
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<https://www.w3.org/International/questions/qa-choosing-language-tags#langsubtag>`_
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.. _startpage languages:
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Startpage languages
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===================
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:py:obj:`send_accept_language_header`:
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The displayed name in Startpage's settings page depend on the location of the
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IP when ``Accept-Language`` HTTP header is unset. In :py:obj:`fetch_traits`
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we use::
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'Accept-Language': "en-US,en;q=0.5",
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..
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to get uniform names independent from the IP).
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.. _startpage categories:
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Startpage categories
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====================
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Startpage's category (for Web-search, News, Videos, ..) is set by
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:py:obj:`startpage_categ` in settings.yml::
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- name: startpage
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engine: startpage
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startpage_categ: web
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...
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.. hint::
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The default category is ``web`` .. and other categories than ``web`` are not
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yet implemented.
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"""
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from typing import TYPE_CHECKING
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from collections import OrderedDict
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import re
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from unicodedata import normalize, combining
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from time import time
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from datetime import datetime, timedelta
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import dateutil.parser
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import lxml.html
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import babel
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from searx.utils import extract_text, eval_xpath, gen_useragent
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from searx.network import get # see https://github.com/searxng/searxng/issues/762
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from searx.exceptions import SearxEngineCaptchaException
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from searx.locales import region_tag
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from searx.enginelib.traits import EngineTraits
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if TYPE_CHECKING:
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import logging
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logger: logging.Logger
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traits: EngineTraits
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# about
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about = {
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"website": 'https://startpage.com',
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"wikidata_id": 'Q2333295',
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"official_api_documentation": None,
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"use_official_api": False,
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"require_api_key": False,
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"results": 'HTML',
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}
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startpage_categ = 'web'
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"""Startpage's category, visit :ref:`startpage categories`.
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"""
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send_accept_language_header = True
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"""Startpage tries to guess user's language and territory from the HTTP
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``Accept-Language``. Optional the user can select a search-language (can be
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different to the UI language) and a region filter.
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"""
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# engine dependent config
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categories = ['general', 'web']
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paging = True
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time_range_support = True
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safesearch = True
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time_range_dict = {'day': 'd', 'week': 'w', 'month': 'm', 'year': 'y'}
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safesearch_dict = {0: '0', 1: '1', 2: '1'}
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# search-url
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base_url = 'https://www.startpage.com'
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search_url = base_url + '/sp/search'
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# specific xpath variables
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# ads xpath //div[@id="results"]/div[@id="sponsored"]//div[@class="result"]
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# not ads: div[@class="result"] are the direct childs of div[@id="results"]
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results_xpath = '//div[@class="w-gl__result__main"]'
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link_xpath = './/a[@class="w-gl__result-title result-link"]'
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content_xpath = './/p[@class="w-gl__description"]'
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search_form_xpath = '//form[@id="search"]'
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"""XPath of Startpage's origin search form
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.. code: html
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<form action="/sp/search" method="post">
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<input type="text" name="query" value="" ..>
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<input type="hidden" name="t" value="device">
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<input type="hidden" name="lui" value="english">
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<input type="hidden" name="sc" value="Q7Mt5TRqowKB00">
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<input type="hidden" name="cat" value="web">
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<input type="hidden" class="abp" id="abp-input" name="abp" value="1">
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</form>
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"""
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# timestamp of the last fetch of 'sc' code
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sc_code_ts = 0
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sc_code = ''
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sc_code_cache_sec = 30
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"""Time in seconds the sc-code is cached in memory :py:obj:`get_sc_code`."""
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def get_sc_code(searxng_locale, params):
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"""Get an actual ``sc`` argument from Startpage's search form (HTML page).
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Startpage puts a ``sc`` argument on every HTML :py:obj:`search form
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<search_form_xpath>`. Without this argument Startpage considers the request
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is from a bot. We do not know what is encoded in the value of the ``sc``
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argument, but it seems to be a kind of a *time-stamp*.
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Startpage's search form generates a new sc-code on each request. This
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function scrap a new sc-code from Startpage's home page every
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:py:obj:`sc_code_cache_sec` seconds.
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"""
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global sc_code_ts, sc_code # pylint: disable=global-statement
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if sc_code and (time() < (sc_code_ts + sc_code_cache_sec)):
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logger.debug("get_sc_code: reuse '%s'", sc_code)
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return sc_code
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headers = {**params['headers']}
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headers['Origin'] = base_url
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headers['Referer'] = base_url + '/'
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# headers['Connection'] = 'keep-alive'
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# headers['Accept-Encoding'] = 'gzip, deflate, br'
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# headers['Accept'] = 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8'
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# headers['User-Agent'] = 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:105.0) Gecko/20100101 Firefox/105.0'
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# add Accept-Language header
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if searxng_locale == 'all':
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searxng_locale = 'en-US'
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locale = babel.Locale.parse(searxng_locale, sep='-')
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if send_accept_language_header:
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ac_lang = locale.language
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if locale.territory:
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ac_lang = "%s-%s,%s;q=0.9,*;q=0.5" % (
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locale.language,
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locale.territory,
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locale.language,
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)
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headers['Accept-Language'] = ac_lang
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get_sc_url = base_url + '/?sc=%s' % (sc_code)
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logger.debug("query new sc time-stamp ... %s", get_sc_url)
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logger.debug("headers: %s", headers)
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resp = get(get_sc_url, headers=headers)
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# ?? x = network.get('https://www.startpage.com/sp/cdn/images/filter-chevron.svg', headers=headers)
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# ?? https://www.startpage.com/sp/cdn/images/filter-chevron.svg
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# ?? ping-back URL: https://www.startpage.com/sp/pb?sc=TLsB0oITjZ8F21
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if str(resp.url).startswith('https://www.startpage.com/sp/captcha'): # type: ignore
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raise SearxEngineCaptchaException(
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message="get_sc_code: got redirected to https://www.startpage.com/sp/captcha",
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)
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dom = lxml.html.fromstring(resp.text) # type: ignore
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try:
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sc_code = eval_xpath(dom, search_form_xpath + '//input[@name="sc"]/@value')[0]
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except IndexError as exc:
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logger.debug("suspend startpage API --> https://github.com/searxng/searxng/pull/695")
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raise SearxEngineCaptchaException(
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message="get_sc_code: [PR-695] query new sc time-stamp failed! (%s)" % resp.url, # type: ignore
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) from exc
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sc_code_ts = time()
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logger.debug("get_sc_code: new value is: %s", sc_code)
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return sc_code
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def request(query, params):
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"""Assemble a Startpage request.
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To avoid CAPTCHA we need to send a well formed HTTP POST request with a
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cookie. We need to form a request that is identical to the request build by
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Startpage's search form:
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- in the cookie the **region** is selected
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- in the HTTP POST data the **language** is selected
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Additionally the arguments form Startpage's search form needs to be set in
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HTML POST data / compare ``<input>`` elements: :py:obj:`search_form_xpath`.
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"""
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if startpage_categ == 'web':
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return _request_cat_web(query, params)
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logger.error("Startpages's category '%' is not yet implemented.", startpage_categ)
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return params
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def _request_cat_web(query, params):
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engine_region = traits.get_region(params['searxng_locale'], 'en-US')
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engine_language = traits.get_language(params['searxng_locale'], 'en')
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# build arguments
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args = {
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'query': query,
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'cat': 'web',
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't': 'device',
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'sc': get_sc_code(params['searxng_locale'], params), # hint: this func needs HTTP headers,
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'with_date': time_range_dict.get(params['time_range'], ''),
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}
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if engine_language:
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args['language'] = engine_language
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args['lui'] = engine_language
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args['abp'] = '1'
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if params['pageno'] > 1:
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args['page'] = params['pageno']
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# build cookie
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lang_homepage = 'en'
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cookie = OrderedDict()
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cookie['date_time'] = 'world'
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cookie['disable_family_filter'] = safesearch_dict[params['safesearch']]
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cookie['disable_open_in_new_window'] = '0'
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cookie['enable_post_method'] = '1' # hint: POST
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cookie['enable_proxy_safety_suggest'] = '1'
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cookie['enable_stay_control'] = '1'
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cookie['instant_answers'] = '1'
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cookie['lang_homepage'] = 's/device/%s/' % lang_homepage
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cookie['num_of_results'] = '10'
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cookie['suggestions'] = '1'
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cookie['wt_unit'] = 'celsius'
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if engine_language:
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cookie['language'] = engine_language
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cookie['language_ui'] = engine_language
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if engine_region:
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cookie['search_results_region'] = engine_region
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params['cookies']['preferences'] = 'N1N'.join(["%sEEE%s" % x for x in cookie.items()])
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logger.debug('cookie preferences: %s', params['cookies']['preferences'])
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# POST request
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logger.debug("data: %s", args)
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params['data'] = args
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params['method'] = 'POST'
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params['url'] = search_url
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params['headers']['Origin'] = base_url
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params['headers']['Referer'] = base_url + '/'
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# is the Accept header needed?
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# params['headers']['Accept'] = 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8'
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return params
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# get response from search-request
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def response(resp):
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dom = lxml.html.fromstring(resp.text)
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if startpage_categ == 'web':
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return _response_cat_web(dom)
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logger.error("Startpages's category '%' is not yet implemented.", startpage_categ)
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return []
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def _response_cat_web(dom):
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results = []
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# parse results
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for result in eval_xpath(dom, results_xpath):
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links = eval_xpath(result, link_xpath)
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if not links:
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continue
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link = links[0]
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url = link.attrib.get('href')
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# block google-ad url's
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if re.match(r"^http(s|)://(www\.)?google\.[a-z]+/aclk.*$", url):
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continue
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# block startpage search url's
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if re.match(r"^http(s|)://(www\.)?startpage\.com/do/search\?.*$", url):
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continue
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title = extract_text(link)
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if eval_xpath(result, content_xpath):
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content: str = extract_text(eval_xpath(result, content_xpath)) # type: ignore
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else:
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content = ''
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published_date = None
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# check if search result starts with something like: "2 Sep 2014 ... "
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if re.match(r"^([1-9]|[1-2][0-9]|3[0-1]) [A-Z][a-z]{2} [0-9]{4} \.\.\. ", content):
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date_pos = content.find('...') + 4
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date_string = content[0 : date_pos - 5]
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# fix content string
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content = content[date_pos:]
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try:
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published_date = dateutil.parser.parse(date_string, dayfirst=True)
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except ValueError:
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pass
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# check if search result starts with something like: "5 days ago ... "
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elif re.match(r"^[0-9]+ days? ago \.\.\. ", content):
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date_pos = content.find('...') + 4
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date_string = content[0 : date_pos - 5]
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# calculate datetime
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published_date = datetime.now() - timedelta(days=int(re.match(r'\d+', date_string).group())) # type: ignore
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# fix content string
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content = content[date_pos:]
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if published_date:
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# append result
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results.append({'url': url, 'title': title, 'content': content, 'publishedDate': published_date})
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else:
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# append result
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results.append({'url': url, 'title': title, 'content': content})
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# return results
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return results
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def fetch_traits(engine_traits: EngineTraits):
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"""Fetch :ref:`languages <startpage languages>` and :ref:`regions <startpage
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regions>` from Startpage."""
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# pylint: disable=too-many-branches
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headers = {
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'User-Agent': gen_useragent(),
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'Accept-Language': "en-US,en;q=0.5", # bing needs to set the English language
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}
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resp = get('https://www.startpage.com/do/settings', headers=headers)
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if not resp.ok: # type: ignore
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print("ERROR: response from Startpage is not OK.")
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dom = lxml.html.fromstring(resp.text) # type: ignore
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# regions
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sp_region_names = []
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for option in dom.xpath('//form[@name="settings"]//select[@name="search_results_region"]/option'):
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sp_region_names.append(option.get('value'))
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for eng_tag in sp_region_names:
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if eng_tag == 'all':
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continue
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babel_region_tag = {'no_NO': 'nb_NO'}.get(eng_tag, eng_tag) # norway
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if '-' in babel_region_tag:
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l, r = babel_region_tag.split('-')
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r = r.split('_')[-1]
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sxng_tag = region_tag(babel.Locale.parse(l + '_' + r, sep='_'))
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else:
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try:
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sxng_tag = region_tag(babel.Locale.parse(babel_region_tag, sep='_'))
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except babel.UnknownLocaleError:
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print("ERROR: can't determine babel locale of startpage's locale %s" % eng_tag)
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continue
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conflict = engine_traits.regions.get(sxng_tag)
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if conflict:
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if conflict != eng_tag:
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print("CONFLICT: babel %s --> %s, %s" % (sxng_tag, conflict, eng_tag))
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continue
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engine_traits.regions[sxng_tag] = eng_tag
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# languages
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catalog_engine2code = {name.lower(): lang_code for lang_code, name in babel.Locale('en').languages.items()}
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# get the native name of every language known by babel
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for lang_code in filter(
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lambda lang_code: lang_code.find('_') == -1, babel.localedata.locale_identifiers() # type: ignore
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):
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native_name = babel.Locale(lang_code).get_language_name().lower() # type: ignore
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# add native name exactly as it is
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catalog_engine2code[native_name] = lang_code
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# add "normalized" language name (i.e. français becomes francais and español becomes espanol)
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unaccented_name = ''.join(filter(lambda c: not combining(c), normalize('NFKD', native_name)))
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if len(unaccented_name) == len(unaccented_name.encode()):
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# add only if result is ascii (otherwise "normalization" didn't work)
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catalog_engine2code[unaccented_name] = lang_code
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# values that can't be determined by babel's languages names
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catalog_engine2code.update(
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{
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# traditional chinese used in ..
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'fantizhengwen': 'zh_Hant',
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# Korean alphabet
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'hangul': 'ko',
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# Malayalam is one of 22 scheduled languages of India.
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'malayam': 'ml',
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'norsk': 'nb',
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'sinhalese': 'si',
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}
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)
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skip_eng_tags = {
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'english_uk', # SearXNG lang 'en' already maps to 'english'
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}
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for option in dom.xpath('//form[@name="settings"]//select[@name="language"]/option'):
|
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|
|
eng_tag = option.get('value')
|
|
if eng_tag in skip_eng_tags:
|
|
continue
|
|
name = extract_text(option).lower() # type: ignore
|
|
|
|
sxng_tag = catalog_engine2code.get(eng_tag)
|
|
if sxng_tag is None:
|
|
sxng_tag = catalog_engine2code[name]
|
|
|
|
conflict = engine_traits.languages.get(sxng_tag)
|
|
if conflict:
|
|
if conflict != eng_tag:
|
|
print("CONFLICT: babel %s --> %s, %s" % (sxng_tag, conflict, eng_tag))
|
|
continue
|
|
engine_traits.languages[sxng_tag] = eng_tag
|