mirror of
https://github.com/searxng/searxng
synced 2024-01-01 18:24:07 +00:00
9ff881f937
Instead of raising an exception and therefore hiding all results of the engine.
It make sense to remove that requirement in order to allow the implementation of
search engines that do not always have a description. In fact some search
engines that in 99% of the case have a description like Brave Search or Mojeek
crash completely if they for some reason included a result with no description.
To test this patch try Mojeek:
!mjk xyz
before and after the patch.
Suggested-by: 0xhtml in https://github.com/searx/searx/discussions/2933
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
253 lines
7.2 KiB
Python
253 lines
7.2 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
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# lint: pylint
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# pylint: disable=missing-function-docstring
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"""The XPath engine is a *generic* engine with which it is possible to configure
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engines in the settings.
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Here is a simple example of a XPath engine configured in the
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:ref:`settings engine` section, further read :ref:`engines-dev`.
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.. code:: yaml
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- name : bitbucket
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engine : xpath
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paging : True
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search_url : https://bitbucket.org/repo/all/{pageno}?name={query}
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url_xpath : //article[@class="repo-summary"]//a[@class="repo-link"]/@href
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title_xpath : //article[@class="repo-summary"]//a[@class="repo-link"]
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content_xpath : //article[@class="repo-summary"]/p
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"""
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from urllib.parse import urlencode
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from lxml import html
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from searx.utils import extract_text, extract_url, eval_xpath, eval_xpath_list
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from searx import logger
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logger = logger.getChild('XPath engine')
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search_url = None
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"""
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Search URL of the engine. Example::
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https://example.org/?search={query}&page={pageno}{time_range}{safe_search}
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Replacements are:
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``{query}``:
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Search terms from user.
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``{pageno}``:
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Page number if engine supports pagging :py:obj:`paging`
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``{lang}``:
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ISO 639-1 language code (en, de, fr ..)
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``{time_range}``:
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:py:obj:`URL parameter <time_range_url>` if engine :py:obj:`supports time
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range <time_range_support>`. The value for the parameter is taken from
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:py:obj:`time_range_map`.
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``{safe_search}``:
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Safe-search :py:obj:`URL parameter <safe_search_map>` if engine
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:py:obj:`supports safe-search <safe_search_support>`. The ``{safe_search}``
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replacement is taken from the :py:obj:`safes_search_map`. Filter results::
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0: none, 1: moderate, 2:strict
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If not supported, the URL paramter is an empty string.
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"""
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lang_all='en'
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'''Replacement ``{lang}`` in :py:obj:`search_url` if language ``all`` is
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selected.
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'''
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soft_max_redirects = 0
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'''Maximum redirects, soft limit. Record an error but don't stop the engine'''
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results_xpath = ''
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'''XPath selector for the list of result items'''
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url_xpath = None
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'''XPath selector of result's ``url``.'''
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content_xpath = None
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'''XPath selector of result's ``content``.'''
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title_xpath = None
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'''XPath selector of result's ``title``.'''
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thumbnail_xpath = False
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'''XPath selector of result's ``img_src``.'''
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suggestion_xpath = ''
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'''XPath selector of result's ``suggestion``.'''
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cached_xpath = ''
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cached_url = ''
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paging = False
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'''Engine supports paging [True or False].'''
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page_size = 1
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'''Number of results on each page. Only needed if the site requires not a page
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number, but an offset.'''
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first_page_num = 1
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'''Number of the first page (usually 0 or 1).'''
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time_range_support = False
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'''Engine supports search time range.'''
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time_range_url = '&hours={time_range_val}'
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'''Time range URL parameter in the in :py:obj:`search_url`. If no time range is
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requested by the user, the URL paramter is an empty string. The
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``{time_range_val}`` replacement is taken from the :py:obj:`time_range_map`.
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.. code:: yaml
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time_range_url : '&days={time_range_val}'
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'''
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time_range_map = {
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'day': 24,
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'week': 24*7,
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'month': 24*30,
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'year': 24*365,
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}
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'''Maps time range value from user to ``{time_range_val}`` in
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:py:obj:`time_range_url`.
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.. code:: yaml
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time_range_map:
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day: 1
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week: 7
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month: 30
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year: 365
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'''
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safe_search_support = False
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'''Engine supports safe-search.'''
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safe_search_map = {
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0: '&filter=none',
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1: '&filter=moderate',
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2: '&filter=strict'
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}
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'''Maps safe-search value to ``{safe_search}`` in :py:obj:`search_url`.
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.. code:: yaml
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safesearch: true
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safes_search_map:
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0: '&filter=none'
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1: '&filter=moderate'
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2: '&filter=strict'
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'''
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def request(query, params):
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'''Build request parameters (see :ref:`engine request`).
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'''
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lang = lang_all
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if params['language'] != 'all':
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lang = params['language'][:2]
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time_range = ''
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if params.get('time_range'):
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time_range_val = time_range_map.get(params.get('time_range'))
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time_range = time_range_url.format(time_range_val=time_range_val)
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safe_search = ''
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if params['safesearch']:
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safe_search = safe_search_map[params['safesearch']]
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fargs = {
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'query': urlencode({'q': query})[2:],
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'lang': lang,
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'pageno': (params['pageno'] - 1) * page_size + first_page_num,
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'time_range' : time_range,
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'safe_search' : safe_search,
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}
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params['url'] = search_url.format(**fargs)
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params['soft_max_redirects'] = soft_max_redirects
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logger.debug("query_url --> %s", params['url'])
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return params
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def response(resp):
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'''Scrap *results* from the response (see :ref:`engine results`).
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'''
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results = []
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dom = html.fromstring(resp.text)
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is_onion = 'onions' in categories # pylint: disable=undefined-variable
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if results_xpath:
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for result in eval_xpath_list(dom, results_xpath):
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url = extract_url(eval_xpath_list(result, url_xpath, min_len=1), search_url)
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title = extract_text(eval_xpath_list(result, title_xpath, min_len=1))
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content = extract_text(eval_xpath_list(result, content_xpath))
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tmp_result = {'url': url, 'title': title, 'content': content}
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# add thumbnail if available
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if thumbnail_xpath:
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thumbnail_xpath_result = eval_xpath_list(result, thumbnail_xpath)
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if len(thumbnail_xpath_result) > 0:
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tmp_result['img_src'] = extract_url(thumbnail_xpath_result, search_url)
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# add alternative cached url if available
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if cached_xpath:
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tmp_result['cached_url'] = (
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cached_url
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+ extract_text(eval_xpath_list(result, cached_xpath, min_len=1))
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)
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if is_onion:
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tmp_result['is_onion'] = True
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results.append(tmp_result)
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else:
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if cached_xpath:
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for url, title, content, cached in zip(
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(extract_url(x, search_url) for
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x in eval_xpath_list(dom, url_xpath)),
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map(extract_text, eval_xpath_list(dom, title_xpath)),
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map(extract_text, eval_xpath_list(dom, content_xpath)),
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map(extract_text, eval_xpath_list(dom, cached_xpath))
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):
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results.append({
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'url': url,
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'title': title,
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'content': content,
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'cached_url': cached_url + cached, 'is_onion': is_onion
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})
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else:
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for url, title, content in zip(
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(extract_url(x, search_url) for
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x in eval_xpath_list(dom, url_xpath)),
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map(extract_text, eval_xpath_list(dom, title_xpath)),
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map(extract_text, eval_xpath_list(dom, content_xpath))
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):
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results.append({
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'url': url,
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'title': title,
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'content': content,
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'is_onion': is_onion
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})
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if suggestion_xpath:
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for suggestion in eval_xpath(dom, suggestion_xpath):
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results.append({'suggestion': extract_text(suggestion)})
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logger.debug("found %s results", len(results))
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return results
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