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420 lines
12 KiB
Python
420 lines
12 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
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# lint: pylint
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"""Brave supports the categories listed in :py:obj:`brave_category` (General,
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news, videos, images). The support of :py:obj:`paging` and :py:obj:`time range
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<time_range_support>` is limited (see remarks).
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Configured ``brave`` engines:
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.. code:: yaml
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- name: brave
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engine: brave
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...
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brave_category: search
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time_range_support: true
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paging: true
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- name: brave.images
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engine: brave
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...
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brave_category: images
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- name: brave.videos
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engine: brave
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...
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brave_category: videos
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- name: brave.news
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engine: brave
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...
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brave_category: news
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.. _brave regions:
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Brave regions
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=============
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Brave uses two-digit tags for the regions like ``ca`` while SearXNG deals with
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locales. To get a mapping, all *officiat de-facto* languages of the Brave
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region are mapped to regions in SearXNG (see :py:obj:`babel
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<babel.languages.get_official_languages>`):
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.. code:: python
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"regions": {
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..
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"en-CA": "ca",
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"fr-CA": "ca",
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..
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}
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.. note::
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The language (aka region) support of Brave's index is limited to very basic
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languages. The search results for languages like Chinese or Arabic are of
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low quality.
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.. _brave languages:
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Brave languages
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===============
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Brave's language support is limited to the UI (menus, area local notations,
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etc). Brave's index only seems to support a locale, but it does not seem to
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support any languages in its index. The choice of available languages is very
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small (and its not clear to me where the difference in UI is when switching
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from en-us to en-ca or en-gb).
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In the :py:obj:`EngineTraits object <searx.enginelib.traits.EngineTraits>` the
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UI languages are stored in a custom field named ``ui_lang``:
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.. code:: python
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"custom": {
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"ui_lang": {
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"ca": "ca",
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"de-DE": "de-de",
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"en-CA": "en-ca",
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"en-GB": "en-gb",
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"en-US": "en-us",
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"es": "es",
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"fr-CA": "fr-ca",
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"fr-FR": "fr-fr",
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"ja-JP": "ja-jp",
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"pt-BR": "pt-br",
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"sq-AL": "sq-al"
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}
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},
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Implementations
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===============
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"""
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from typing import TYPE_CHECKING
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import re
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from urllib.parse import (
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urlencode,
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urlparse,
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parse_qs,
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)
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from lxml import html
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from searx import locales
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from searx.utils import (
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extract_text,
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eval_xpath_list,
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eval_xpath_getindex,
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js_variable_to_python,
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)
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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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"website": 'https://search.brave.com/',
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"wikidata_id": 'Q22906900',
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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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base_url = "https://search.brave.com/"
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categories = []
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brave_category = 'search'
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"""Brave supports common web-search, video search, image and video search.
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- ``search``: Common WEB search
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- ``videos``: search for videos
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- ``images``: search for images
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- ``news``: search for news
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"""
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brave_spellcheck = False
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"""Brave supports some kind of spell checking. When activated, Brave tries to
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fix typos, e.g. it searches for ``food`` when the user queries for ``fooh``. In
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the UI of Brave the user gets warned about this, since we can not warn the user
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in SearXNG, the spellchecking is disabled by default.
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"""
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send_accept_language_header = True
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paging = False
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"""Brave only supports paging in :py:obj:`brave_category` ``search`` (UI
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category All)."""
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safesearch = True
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safesearch_map = {2: 'strict', 1: 'moderate', 0: 'off'} # cookie: safesearch=off
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time_range_support = False
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"""Brave only supports time-range in :py:obj:`brave_category` ``search`` (UI
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category All)."""
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time_range_map = {
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'day': 'pd',
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'week': 'pw',
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'month': 'pm',
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'year': 'py',
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}
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def request(query, params):
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# Don't accept br encoding / see https://github.com/searxng/searxng/pull/1787
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params['headers']['Accept-Encoding'] = 'gzip, deflate'
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args = {
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'q': query,
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}
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if brave_spellcheck:
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args['spellcheck'] = '1'
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if brave_category == 'search':
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if params.get('pageno', 1) - 1:
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args['offset'] = params.get('pageno', 1) - 1
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if time_range_map.get(params['time_range']):
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args['tf'] = time_range_map.get(params['time_range'])
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params["url"] = f"{base_url}{brave_category}?{urlencode(args)}"
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# set properties in the cookies
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params['cookies']['safesearch'] = safesearch_map.get(params['safesearch'], 'off')
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# the useLocation is IP based, we use cookie 'country' for the region
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params['cookies']['useLocation'] = '0'
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params['cookies']['summarizer'] = '0'
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engine_region = traits.get_region(params['searxng_locale'], 'all')
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params['cookies']['country'] = engine_region.split('-')[-1].lower() # type: ignore
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ui_lang = locales.get_engine_locale(params['searxng_locale'], traits.custom["ui_lang"], 'en-us')
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params['cookies']['ui_lang'] = ui_lang
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logger.debug("cookies %s", params['cookies'])
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def response(resp):
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if brave_category == 'search':
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return _parse_search(resp)
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datastr = ""
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for line in resp.text.split("\n"):
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if "const data = " in line:
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datastr = line.replace("const data = ", "").strip()[:-1]
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break
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json_data = js_variable_to_python(datastr)
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json_resp = json_data[1]['data']['body']['response']
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if brave_category == 'news':
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return _parse_news(json_resp['news'])
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if brave_category == 'images':
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return _parse_images(json_resp)
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if brave_category == 'videos':
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return _parse_videos(json_resp)
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raise ValueError(f"Unsupported brave category: {brave_category}")
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def _parse_search(resp):
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result_list = []
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dom = html.fromstring(resp.text)
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answer_tag = eval_xpath_getindex(dom, '//div[@class="answer"]', 0, default=None)
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if answer_tag:
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url = eval_xpath_getindex(dom, '//div[@id="featured_snippet"]/a[@class="result-header"]/@href', 0, default=None)
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result_list.append({'answer': extract_text(answer_tag), 'url': url})
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# xpath_results = '//div[contains(@class, "snippet fdb") and @data-type="web"]'
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xpath_results = '//div[contains(@class, "snippet ")]'
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for result in eval_xpath_list(dom, xpath_results):
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url = eval_xpath_getindex(result, './/a[contains(@class, "h")]/@href', 0, default=None)
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title_tag = eval_xpath_getindex(result, './/div[contains(@class, "title")]', 0, default=None)
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if url is None or title_tag is None or not urlparse(url).netloc: # partial url likely means it's an ad
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continue
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content_tag = eval_xpath_getindex(result, './/div[@class="snippet-description"]', 0, default='')
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img_src = eval_xpath_getindex(result, './/img[contains(@class, "thumb")]/@src', 0, default='')
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item = {
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'url': url,
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'title': extract_text(title_tag),
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'content': extract_text(content_tag),
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'img_src': img_src,
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}
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video_tag = eval_xpath_getindex(
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result, './/div[contains(@class, "video-snippet") and @data-macro="video"]', 0, default=None
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)
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if video_tag is not None:
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# In my tests a video tag in the WEB search was most often not a
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# video, except the ones from youtube ..
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iframe_src = _get_iframe_src(url)
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if iframe_src:
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item['iframe_src'] = iframe_src
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item['template'] = 'videos.html'
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item['thumbnail'] = eval_xpath_getindex(video_tag, './/img/@src', 0, default='')
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else:
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item['img_src'] = eval_xpath_getindex(video_tag, './/img/@src', 0, default='')
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result_list.append(item)
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return result_list
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def _get_iframe_src(url):
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parsed_url = urlparse(url)
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if parsed_url.path == '/watch' and parsed_url.query:
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video_id = parse_qs(parsed_url.query).get('v', []) # type: ignore
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if video_id:
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return 'https://www.youtube-nocookie.com/embed/' + video_id[0] # type: ignore
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return None
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def _parse_news(json_resp):
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result_list = []
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for result in json_resp["results"]:
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item = {
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'url': result['url'],
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'title': result['title'],
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'content': result['description'],
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}
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if result['thumbnail'] is not None:
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item['img_src'] = result['thumbnail']['src']
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result_list.append(item)
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return result_list
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def _parse_images(json_resp):
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result_list = []
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for result in json_resp["results"]:
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item = {
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'url': result['url'],
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'title': result['title'],
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'content': result['description'],
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'template': 'images.html',
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'img_format': result['properties']['format'],
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'source': result['source'],
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'img_src': result['properties']['url'],
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}
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result_list.append(item)
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return result_list
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def _parse_videos(json_resp):
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result_list = []
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for result in json_resp["results"]:
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url = result['url']
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item = {
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'url': url,
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'title': result['title'],
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'content': result['description'],
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'template': 'videos.html',
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'length': result['video']['duration'],
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'duration': result['video']['duration'],
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}
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if result['thumbnail'] is not None:
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item['thumbnail'] = result['thumbnail']['src']
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iframe_src = _get_iframe_src(url)
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if iframe_src:
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item['iframe_src'] = iframe_src
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result_list.append(item)
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return result_list
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def fetch_traits(engine_traits: EngineTraits):
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"""Fetch :ref:`languages <brave languages>` and :ref:`regions <brave
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regions>` from Brave."""
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# pylint: disable=import-outside-toplevel
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import babel.languages
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from searx.locales import region_tag, language_tag
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from searx.network import get # see https://github.com/searxng/searxng/issues/762
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engine_traits.custom["ui_lang"] = {}
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headers = {
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'Accept-Encoding': 'gzip, deflate',
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}
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lang_map = {'no': 'nb'} # norway
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# languages (UI)
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resp = get('https://search.brave.com/settings', headers=headers)
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if not resp.ok: # type: ignore
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print("ERROR: response from Brave is not OK.")
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dom = html.fromstring(resp.text) # type: ignore
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for option in dom.xpath('//div[@id="language-select"]//option'):
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ui_lang = option.get('value')
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try:
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if '-' in ui_lang:
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sxng_tag = region_tag(babel.Locale.parse(ui_lang, sep='-'))
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else:
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sxng_tag = language_tag(babel.Locale.parse(ui_lang))
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except babel.UnknownLocaleError:
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print("ERROR: can't determine babel locale of Brave's (UI) language %s" % ui_lang)
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continue
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conflict = engine_traits.custom["ui_lang"].get(sxng_tag)
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if conflict:
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if conflict != ui_lang:
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print("CONFLICT: babel %s --> %s, %s" % (sxng_tag, conflict, ui_lang))
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continue
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engine_traits.custom["ui_lang"][sxng_tag] = ui_lang
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# search regions of brave
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engine_traits.all_locale = 'all'
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for country in dom.xpath('//div[@id="sidebar"]//ul/li/div[contains(@class, "country")]'):
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flag = country.xpath('./span[contains(@class, "flag")]')[0]
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# country_name = extract_text(flag.xpath('./following-sibling::*')[0])
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country_tag = re.search(r'flag-([^\s]*)\s', flag.xpath('./@class')[0]).group(1) # type: ignore
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# add official languages of the country ..
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for lang_tag in babel.languages.get_official_languages(country_tag, de_facto=True):
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lang_tag = lang_map.get(lang_tag, lang_tag)
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sxng_tag = region_tag(babel.Locale.parse('%s_%s' % (lang_tag, country_tag.upper())))
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# print("%-20s: %s <-- %s" % (country_name, country_tag, sxng_tag))
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conflict = engine_traits.regions.get(sxng_tag)
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if conflict:
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if conflict != country_tag:
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print("CONFLICT: babel %s --> %s, %s" % (sxng_tag, conflict, country_tag))
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continue
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engine_traits.regions[sxng_tag] = country_tag
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