mirror of https://github.com/searxng/searxng.git
265 lines
8.0 KiB
Python
265 lines
8.0 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
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"""Presearch supports the search types listed in :py:obj:`search_type` (general,
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images, videos, news).
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Configured ``presarch`` engines:
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.. code:: yaml
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- name: presearch
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engine: presearch
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search_type: search
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categories: [general, web]
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- name: presearch images
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...
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search_type: images
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categories: [images, web]
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- name: presearch videos
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...
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search_type: videos
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categories: [general, web]
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- name: presearch news
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...
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search_type: news
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categories: [news, web]
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.. hint::
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By default Presearch's video category is intentionally placed into::
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categories: [general, web]
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Search type ``video``
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=====================
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The results in the video category are most often links to pages that contain a
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video, for instance many links from Preasearch's video category link content
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from facebook (aka Meta) or Twitter (aka X). Since these are not real links to
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video streams SearXNG can't use the video template for this and if SearXNG can't
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use this template, then the user doesn't want to see these hits in the videos
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category.
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Languages & Regions
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===================
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In Presearch there are languages for the UI and regions for narrowing down the
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search. If we set "auto" for the region in the WEB-UI of Presearch and cookie
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``use_local_search_results=false``, then the defaults are set for both (the
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language and the region) from the ``Accept-Language`` header.
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Since the region is already "auto" by default, we only need to set the
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``use_local_search_results`` cookie and send the ``Accept-Language`` header. We
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have to set these values in both requests we send to Presearch; in the first
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request to get the request-ID from Presearch and in the final request to get the
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result list (see ``send_accept_language_header``).
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Implementations
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===============
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"""
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from urllib.parse import urlencode
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from searx import locales
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from searx.network import get
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from searx.utils import gen_useragent, html_to_text
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about = {
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"website": "https://presearch.io",
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"wikidiata_id": "Q7240905",
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"official_api_documentation": "https://docs.presearch.io/nodes/api",
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"use_official_api": False,
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"require_api_key": False,
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"results": "JSON",
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}
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paging = True
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safesearch = True
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time_range_support = True
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send_accept_language_header = True
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categories = ["general", "web"] # general, images, videos, news
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search_type = "search"
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"""must be any of ``search``, ``images``, ``videos``, ``news``"""
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base_url = "https://presearch.com"
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safesearch_map = {0: 'false', 1: 'true', 2: 'true'}
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def init(_):
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if search_type not in ['search', 'images', 'videos', 'news']:
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raise ValueError(f'presearch search_type: {search_type}')
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def _get_request_id(query, params):
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args = {
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"q": query,
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"page": params["pageno"],
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}
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if params["time_range"]:
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args["time"] = params["time_range"]
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url = f"{base_url}/{search_type}?{urlencode(args)}"
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headers = {
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'User-Agent': gen_useragent(),
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'Cookie': (
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f"b=1;"
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f" presearch_session=;"
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f" use_local_search_results=false;"
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f" use_safe_search={safesearch_map[params['safesearch']]}"
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),
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}
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if params['searxng_locale'] != 'all':
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l = locales.get_locale(params['searxng_locale'])
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# Presearch narrows down the search by region. In SearXNG when the user
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# does not set a region (e.g. 'en-CA' / canada) we cannot hand over a region.
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# We could possibly use searx.locales.get_official_locales to determine
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# in which regions this language is an official one, but then we still
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# wouldn't know which region should be given more weight / Presearch
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# performs an IP-based geolocation of the user, we don't want that in
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# SearXNG ;-)
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if l.territory:
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headers['Accept-Language'] = f"{l.language}-{l.territory},{l.language};" "q=0.9,*;" "q=0.5"
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resp_text = get(url, headers=headers).text # type: ignore
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for line in resp_text.split("\n"):
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if "window.searchId = " in line:
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return line.split("= ")[1][:-1].replace('"', "")
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return None
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def request(query, params):
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request_id = _get_request_id(query, params)
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params["headers"]["Accept"] = "application/json"
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params["url"] = f"{base_url}/results?id={request_id}"
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return params
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def _strip_leading_strings(text):
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for x in ['wikipedia', 'google']:
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if text.lower().endswith(x):
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text = text[: -len(x)]
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return text.strip()
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def parse_search_query(json_results):
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results = []
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for item in json_results.get('specialSections', {}).get('topStoriesCompact', {}).get('data', []):
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result = {
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'url': item['link'],
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'title': item['title'],
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'img_src': item['image'],
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'content': '',
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'metadata': item.get('source'),
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}
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results.append(result)
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for item in json_results.get('standardResults', []):
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result = {
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'url': item['link'],
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'title': item['title'],
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'content': html_to_text(item['description']),
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}
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results.append(result)
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info = json_results.get('infoSection', {}).get('data')
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if info:
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attributes = []
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for item in info.get('about', []):
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text = html_to_text(item)
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if ':' in text:
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# split text into key / value
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label, value = text.split(':', 1)
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else:
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# In other languages (tested with zh-TW) a colon is represented
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# by a different symbol --> then we split at the first space.
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label, value = text.split(' ', 1)
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label = label[:-1]
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value = _strip_leading_strings(value)
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attributes.append({'label': label, 'value': value})
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content = []
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for item in [info.get('subtitle'), info.get('description')]:
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if not item:
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continue
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item = _strip_leading_strings(html_to_text(item))
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if item:
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content.append(item)
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results.append(
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{
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'infobox': info['title'],
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'id': info['title'],
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'img_src': info.get('image'),
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'content': ' | '.join(content),
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'attributes': attributes,
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}
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)
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return results
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def response(resp):
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results = []
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json_resp = resp.json()
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if search_type == 'search':
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results = parse_search_query(json_resp.get('results'))
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elif search_type == 'images':
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for item in json_resp.get('images', []):
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results.append(
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{
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'template': 'images.html',
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'title': item['title'],
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'url': item.get('link'),
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'img_src': item.get('image'),
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'thumbnail_src': item.get('thumbnail'),
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}
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)
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elif search_type == 'videos':
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# The results in the video category are most often links to pages that contain
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# a video and not to a video stream --> SearXNG can't use the video template.
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for item in json_resp.get('videos', []):
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metadata = [x for x in [item.get('description'), item.get('duration')] if x]
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results.append(
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{
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'title': item['title'],
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'url': item.get('link'),
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'content': '',
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'metadata': ' / '.join(metadata),
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'img_src': item.get('image'),
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}
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)
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elif search_type == 'news':
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for item in json_resp.get('news', []):
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metadata = [x for x in [item.get('source'), item.get('time')] if x]
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results.append(
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{
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'title': item['title'],
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'url': item.get('link'),
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'content': item.get('description', ''),
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'metadata': ' / '.join(metadata),
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'img_src': item.get('image'),
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}
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)
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return results
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