searxng/searx/engines/brave.py

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# SPDX-License-Identifier: AGPL-3.0-or-later
# lint: pylint
"""Brave supports the categories listed in :py:obj:`brave_category` (General,
news, videos, images). The support of :py:obj:`paging` and :py:obj:`time range
<time_range_support>` is limited (see remarks).
Configured ``brave`` engines:
.. code:: yaml
- name: brave
engine: brave
...
brave_category: search
time_range_support: true
paging: true
- name: brave.images
engine: brave
...
brave_category: images
- name: brave.videos
engine: brave
...
brave_category: videos
- name: brave.news
engine: brave
...
brave_category: news
.. _brave regions:
Brave regions
=============
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
region are mapped to regions in SearXNG (see :py:obj:`babel
<babel.languages.get_official_languages>`):
.. code:: python
"regions": {
..
"en-CA": "ca",
"fr-CA": "ca",
..
}
.. note::
The language (aka region) support of Brave's index is limited to very basic
languages. The search results for languages like Chinese or Arabic are of
low quality.
.. _brave languages:
Brave languages
===============
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Brave's language support is limited to the UI (menus, area local notations,
etc). Brave's index only seems to support a locale, but it does not seem to
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
from en-us to en-ca or en-gb).
In the :py:obj:`EngineTraits object <searx.enginelib.traits.EngineTraits>` the
UI languages are stored in a custom field named ``ui_lang``:
.. code:: python
"custom": {
"ui_lang": {
"ca": "ca",
"de-DE": "de-de",
"en-CA": "en-ca",
"en-GB": "en-gb",
"en-US": "en-us",
"es": "es",
"fr-CA": "fr-ca",
"fr-FR": "fr-fr",
"ja-JP": "ja-jp",
"pt-BR": "pt-br",
"sq-AL": "sq-al"
}
},
Implementations
===============
"""
from typing import TYPE_CHECKING
from urllib.parse import (
urlencode,
urlparse,
parse_qs,
)
from lxml import html
from searx import locales
from searx.utils import (
extract_text,
eval_xpath_list,
eval_xpath_getindex,
js_variable_to_python,
)
from searx.enginelib.traits import EngineTraits
if TYPE_CHECKING:
import logging
logger: logging.Logger
traits: EngineTraits
about = {
"website": 'https://search.brave.com/',
"wikidata_id": 'Q22906900',
"official_api_documentation": None,
"use_official_api": False,
"require_api_key": False,
"results": 'HTML',
}
base_url = "https://search.brave.com/"
categories = []
brave_category = 'search'
"""Brave supports common web-search, video search, image and video search.
- ``search``: Common WEB search
- ``videos``: search for videos
- ``images``: search for images
- ``news``: search for news
"""
brave_spellcheck = False
"""Brave supports some kind of spell checking. When activated, Brave tries to
fix typos, e.g. it searches for ``food`` when the user queries for ``fooh``. In
the UI of Brave the user gets warned about this, since we can not warn the user
in SearXNG, the spellchecking is disabled by default.
"""
send_accept_language_header = True
paging = False
"""Brave only supports paging in :py:obj:`brave_category` ``search`` (UI
category All)."""
safesearch = True
safesearch_map = {2: 'strict', 1: 'moderate', 0: 'off'} # cookie: safesearch=off
time_range_support = False
"""Brave only supports time-range in :py:obj:`brave_category` ``search`` (UI
category All)."""
time_range_map = {
'day': 'pd',
'week': 'pw',
'month': 'pm',
'year': 'py',
}
def request(query, params):
# Don't accept br encoding / see https://github.com/searxng/searxng/pull/1787
params['headers']['Accept-Encoding'] = 'gzip, deflate'
args = {
'q': query,
}
if brave_spellcheck:
args['spellcheck'] = '1'
if brave_category == 'search':
if params.get('pageno', 1) - 1:
args['offset'] = params.get('pageno', 1) - 1
if time_range_map.get(params['time_range']):
args['tf'] = time_range_map.get(params['time_range'])
params["url"] = f"{base_url}{brave_category}?{urlencode(args)}"
# set properties in the cookies
params['cookies']['safesearch'] = safesearch_map.get(params['safesearch'], 'off')
# the useLocation is IP based, we use cookie 'country' for the region
params['cookies']['useLocation'] = '0'
params['cookies']['summarizer'] = '0'
engine_region = traits.get_region(params['searxng_locale'], 'all')
params['cookies']['country'] = engine_region.split('-')[-1].lower() # type: ignore
ui_lang = locales.get_engine_locale(params['searxng_locale'], traits.custom["ui_lang"], 'en-us')
params['cookies']['ui_lang'] = ui_lang
logger.debug("cookies %s", params['cookies'])
def response(resp):
if brave_category == 'search':
return _parse_search(resp)
datastr = ""
for line in resp.text.split("\n"):
if "const data = " in line:
datastr = line.replace("const data = ", "").strip()[:-1]
break
json_data = js_variable_to_python(datastr)
json_resp = json_data[1]['data']['body']['response']
if brave_category == 'news':
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return _parse_news(json_resp['news'])
if brave_category == 'images':
return _parse_images(json_resp)
if brave_category == 'videos':
return _parse_videos(json_resp)
raise ValueError(f"Unsupported brave category: {brave_category}")
def _parse_search(resp):
result_list = []
dom = html.fromstring(resp.text)
answer_tag = eval_xpath_getindex(dom, '//div[@class="answer"]', 0, default=None)
if answer_tag:
url = eval_xpath_getindex(dom, '//div[@id="featured_snippet"]/a[@class="result-header"]/@href', 0, default=None)
result_list.append({'answer': extract_text(answer_tag), 'url': url})
# xpath_results = '//div[contains(@class, "snippet fdb") and @data-type="web"]'
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xpath_results = '//div[contains(@class, "snippet ")]'
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)
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
continue
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content_tag = eval_xpath_getindex(result, './/div[@class="snippet-description"]', 0, default='')
img_src = eval_xpath_getindex(result, './/img[contains(@class, "thumb")]/@src', 0, default='')
item = {
'url': url,
'title': extract_text(title_tag),
'content': extract_text(content_tag),
'img_src': img_src,
}
video_tag = eval_xpath_getindex(
result, './/div[contains(@class, "video-snippet") and @data-macro="video"]', 0, default=None
)
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
# video, except the ones from youtube ..
iframe_src = _get_iframe_src(url)
if iframe_src:
item['iframe_src'] = iframe_src
item['template'] = 'videos.html'
item['thumbnail'] = eval_xpath_getindex(video_tag, './/img/@src', 0, default='')
else:
item['img_src'] = eval_xpath_getindex(video_tag, './/img/@src', 0, default='')
result_list.append(item)
return result_list
def _get_iframe_src(url):
parsed_url = urlparse(url)
if parsed_url.path == '/watch' and parsed_url.query:
video_id = parse_qs(parsed_url.query).get('v', []) # type: ignore
if video_id:
return 'https://www.youtube-nocookie.com/embed/' + video_id[0] # type: ignore
return None
def _parse_news(json_resp):
result_list = []
for result in json_resp["results"]:
item = {
'url': result['url'],
'title': result['title'],
'content': result['description'],
}
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if result['thumbnail'] is not None:
item['img_src'] = result['thumbnail']['src']
result_list.append(item)
return result_list
def _parse_images(json_resp):
result_list = []
for result in json_resp["results"]:
item = {
'url': result['url'],
'title': result['title'],
'content': result['description'],
'template': 'images.html',
'img_format': result['properties']['format'],
'source': result['source'],
'img_src': result['properties']['url'],
}
result_list.append(item)
return result_list
def _parse_videos(json_resp):
result_list = []
for result in json_resp["results"]:
url = result['url']
item = {
'url': url,
'title': result['title'],
'content': result['description'],
'template': 'videos.html',
'length': result['video']['duration'],
'duration': result['video']['duration'],
}
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if result['thumbnail'] is not None:
item['thumbnail'] = result['thumbnail']['src']
iframe_src = _get_iframe_src(url)
if iframe_src:
item['iframe_src'] = iframe_src
result_list.append(item)
return result_list
def fetch_traits(engine_traits: EngineTraits):
"""Fetch :ref:`languages <brave languages>` and :ref:`regions <brave
regions>` from Brave."""
# pylint: disable=import-outside-toplevel, too-many-branches
import babel.languages
from searx.locales import region_tag, language_tag
from searx.network import get # see https://github.com/searxng/searxng/issues/762
engine_traits.custom["ui_lang"] = {}
headers = {
'Accept-Encoding': 'gzip, deflate',
}
lang_map = {'no': 'nb'} # norway
# languages (UI)
resp = get('https://search.brave.com/settings', headers=headers)
if not resp.ok: # type: ignore
print("ERROR: response from Brave is not OK.")
dom = html.fromstring(resp.text) # type: ignore
for option in dom.xpath('//div[@id="language-select"]//option'):
ui_lang = option.get('value')
try:
if '-' in ui_lang:
sxng_tag = region_tag(babel.Locale.parse(ui_lang, sep='-'))
else:
sxng_tag = language_tag(babel.Locale.parse(ui_lang))
except babel.UnknownLocaleError:
print("ERROR: can't determine babel locale of Brave's (UI) language %s" % ui_lang)
continue
conflict = engine_traits.custom["ui_lang"].get(sxng_tag)
if conflict:
if conflict != ui_lang:
print("CONFLICT: babel %s --> %s, %s" % (sxng_tag, conflict, ui_lang))
continue
engine_traits.custom["ui_lang"][sxng_tag] = ui_lang
# search regions of brave
resp = get('https://cdn.search.brave.com/serp/v2/_app/immutable/chunks/parameters.734c106a.js', headers=headers)
if not resp.ok: # type: ignore
print("ERROR: response from Brave is not OK.")
country_js = resp.text[resp.text.index("options:{all") + len('options:') :]
country_js = country_js[: country_js.index("},k={default")]
country_tags = js_variable_to_python(country_js)
for k, v in country_tags.items():
if k == 'all':
engine_traits.all_locale = 'all'
continue
country_tag = v['value']
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# add official languages of the country ..
for lang_tag in babel.languages.get_official_languages(country_tag, de_facto=True):
lang_tag = lang_map.get(lang_tag, lang_tag)
sxng_tag = region_tag(babel.Locale.parse('%s_%s' % (lang_tag, country_tag.upper())))
# print("%-20s: %s <-- %s" % (v['label'], country_tag, sxng_tag))
conflict = engine_traits.regions.get(sxng_tag)
if conflict:
if conflict != country_tag:
print("CONFLICT: babel %s --> %s, %s" % (sxng_tag, conflict, country_tag))
continue
engine_traits.regions[sxng_tag] = country_tag