[mod] Google: reversed engineered & upgrade to data_type: traits_v1

Partial reverse engineering of the Google engines including a improved language
and region handling based on the engine.traits_v1 data.

When ever possible the implementations of the Google engines try to make use of
the async REST APIs.  The get_lang_info() has been generalized to a
get_google_info() function / especially the region handling has been improved by
adding the cr parameter.

searx/data/engine_traits.json
  Add data type "traits_v1" generated by the fetch_traits() functions from:

  - Google (WEB),
  - Google images,
  - Google news,
  - Google scholar and
  - Google videos

  and remove data from obsolete data type "supported_languages".

  A traits.custom type that maps region codes to *supported_domains* is fetched
  from https://www.google.com/supported_domains

searx/autocomplete.py:
  Reversed engineered autocomplete from Google WEB.  Supports Google's languages and
  subdomains.  The old API suggestqueries.google.com/complete has been replaced
  by the async REST API: https://{subdomain}/complete/search?{args}

searx/engines/google.py
  Reverse engineering and extensive testing ..
  - fetch_traits():  Fetch languages & regions from Google properties.
  - always use the async REST API (formally known as 'use_mobile_ui')
  - use *supported_domains* from traits
  - improved the result list by fetching './/div[@data-content-feature]'
    and parsing the type of the various *content features* --> thumbnails are
    added

searx/engines/google_images.py
  Reverse engineering and extensive testing ..
  - fetch_traits():  Fetch languages & regions from Google properties.
  - use *supported_domains* from traits
  - if exists, freshness_date is added to the result
  - issue 1864: result list has been improved a lot (due to the new cr parameter)

searx/engines/google_news.py
  Reverse engineering and extensive testing ..
  - fetch_traits():  Fetch languages & regions from Google properties.
    *supported_domains* is not needed but a ceid list has been added.
  - different region handling compared to Google WEB
  - fixed for various languages & regions (due to the new ceid parameter) /
    avoid CONSENT page
  - Google News do no longer support time range
  - result list has been fixed: XPath of pub_date and pub_origin

searx/engines/google_videos.py
  - fetch_traits():  Fetch languages & regions from Google properties.
  - use *supported_domains* from traits
  - add paging support
  - implement a async request ('asearch': 'arc' & 'async':
    'use_ac:true,_fmt:html')
  - simplified code (thanks to '_fmt:html' request)
  - issue 1359: fixed xpath of video length data

searx/engines/google_scholar.py
  - fetch_traits():  Fetch languages & regions from Google properties.
  - use *supported_domains* from traits
  - request(): include patents & citations
  - response(): fixed CAPTCHA detection (Scholar has its own CATCHA manager)
  - hardening XPath to iterate over results
  - fixed XPath of pub_type (has been change from gs_ct1 to gs_cgt2 class)
  - issue 1769 fixed: new request implementation is no longer incompatible

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

1 files changed, 244 insertions, 196 deletions

diff --git a/searx/engines/google.py b/searx/engines/google.py
index bee7085ec..bfdd4f1e5 100644
--- a/searx/engines/google.py
+++ b/searx/engines/google.py
@@ -1,38 +1,40 @@
 # SPDX-License-Identifier: AGPL-3.0-or-later
 # lint: pylint
-"""This is the implementation of the google WEB engine.  Some of this
-implementations are shared by other engines:
+"""This is the implementation of the Google WEB engine.  Some of this
+implementations (manly the :py:obj:`get_google_info`) are shared by other
+engines:
 
 - :ref:`google images engine`
 - :ref:`google news engine`
 - :ref:`google videos engine`
-
-The google WEB engine itself has a special setup option:
-
-.. code:: yaml
-
-  - name: google
-    ...
-    use_mobile_ui: false
-
-``use_mobile_ui``: (default: ``false``)
-  Enables to use *mobile endpoint* to bypass the google blocking (see
-  :issue:`159`).  On the mobile UI of Google Search, the button :guilabel:`More
-  results` is not affected by Google rate limiting and we can still do requests
-  while actively blocked by the original Google search.  By activate
-  ``use_mobile_ui`` this behavior is simulated by adding the parameter
-  ``async=use_ac:true,_fmt:pc`` to the :py:func:`request`.
+- :ref:`google scholar engine`
+- :ref:`google autocomplete`
 
 """
 
+from typing import TYPE_CHECKING
+
+import re
 from urllib.parse import urlencode
 from lxml import html
-from searx.utils import match_language, extract_text, eval_xpath, eval_xpath_list, eval_xpath_getindex
+import babel
+import babel.core
+import babel.languages
+
+from searx.utils import extract_text, eval_xpath, eval_xpath_list, eval_xpath_getindex
+from searx.locales import language_tag, region_tag, get_offical_locales
+from searx import network
 from searx.exceptions import SearxEngineCaptchaException
 from searx.enginelib.traits import EngineTraits
 
+if TYPE_CHECKING:
+    import logging
+
+    logger: logging.Logger
+
 traits: EngineTraits
 
+
 # about
 about = {
     "website": 'https://www.google.com',
@@ -48,64 +50,6 @@ categories = ['general', 'web']
 paging = True
 time_range_support = True
 safesearch = True
-send_accept_language_header = True
-use_mobile_ui = False
-supported_languages_url = 'https://www.google.com/preferences?#languages'
-
-# based on https://en.wikipedia.org/wiki/List_of_Google_domains and tests
-google_domains = {
-    'BG': 'google.bg',  # Bulgaria
-    'CZ': 'google.cz',  # Czech Republic
-    'DE': 'google.de',  # Germany
-    'DK': 'google.dk',  # Denmark
-    'AT': 'google.at',  # Austria
-    'CH': 'google.ch',  # Switzerland
-    'GR': 'google.gr',  # Greece
-    'AU': 'google.com.au',  # Australia
-    'CA': 'google.ca',  # Canada
-    'GB': 'google.co.uk',  # United Kingdom
-    'ID': 'google.co.id',  # Indonesia
-    'IE': 'google.ie',  # Ireland
-    'IN': 'google.co.in',  # India
-    'MY': 'google.com.my',  # Malaysia
-    'NZ': 'google.co.nz',  # New Zealand
-    'PH': 'google.com.ph',  # Philippines
-    'SG': 'google.com.sg',  # Singapore
-    'US': 'google.com',  # United States (google.us) redirects to .com
-    'ZA': 'google.co.za',  # South Africa
-    'AR': 'google.com.ar',  # Argentina
-    'CL': 'google.cl',  # Chile
-    'ES': 'google.es',  # Spain
-    'MX': 'google.com.mx',  # Mexico
-    'EE': 'google.ee',  # Estonia
-    'FI': 'google.fi',  # Finland
-    'BE': 'google.be',  # Belgium
-    'FR': 'google.fr',  # France
-    'IL': 'google.co.il',  # Israel
-    'HR': 'google.hr',  # Croatia
-    'HU': 'google.hu',  # Hungary
-    'IT': 'google.it',  # Italy
-    'JP': 'google.co.jp',  # Japan
-    'KR': 'google.co.kr',  # South Korea
-    'LT': 'google.lt',  # Lithuania
-    'LV': 'google.lv',  # Latvia
-    'NO': 'google.no',  # Norway
-    'NL': 'google.nl',  # Netherlands
-    'PL': 'google.pl',  # Poland
-    'BR': 'google.com.br',  # Brazil
-    'PT': 'google.pt',  # Portugal
-    'RO': 'google.ro',  # Romania
-    'RU': 'google.ru',  # Russia
-    'SK': 'google.sk',  # Slovakia
-    'SI': 'google.si',  # Slovenia
-    'SE': 'google.se',  # Sweden
-    'TH': 'google.co.th',  # Thailand
-    'TR': 'google.com.tr',  # Turkey
-    'UA': 'google.com.ua',  # Ukraine
-    'CN': 'google.com.hk',  # There is no google.cn, we use .com.hk for zh-CN
-    'HK': 'google.com.hk',  # Hong Kong
-    'TW': 'google.com.tw',  # Taiwan
-}
 
 time_range_dict = {'day': 'd', 'week': 'w', 'month': 'm', 'year': 'y'}
 
@@ -118,47 +62,50 @@ filter_mapping = {0: 'off', 1: 'medium', 2: 'high'}
 results_xpath = './/div[@data-sokoban-container]'
 title_xpath = './/a/h3[1]'
 href_xpath = './/a[h3]/@href'
-content_xpath = './/div[@data-content-feature=1]'
+content_xpath = './/div[@data-content-feature]'
 
 # google *sections* are no usual *results*, we ignore them
 g_section_with_header = './g-section-with-header'
 
-
 # Suggestions are links placed in a *card-section*, we extract only the text
 # from the links not the links itself.
 suggestion_xpath = '//div[contains(@class, "EIaa9b")]//a'
 
+# UI_ASYNC = 'use_ac:true,_fmt:html' # returns a HTTP 500 when user search for
+#                                    # celebrities like '!google natasha allegri'
+#                                    # or '!google chris evans'
+UI_ASYNC = 'use_ac:true,_fmt:prog'
+"""Format of the response from UI's async request."""
+
 
-def get_lang_info(params, lang_list, custom_aliases, supported_any_language):
-    """Composing various language properties for the google engines.
+def get_google_info(params, eng_traits):
+    """Composing various (language) properties for the google engines (:ref:`google
+    API`).
 
     This function is called by the various google engines (:ref:`google web
     engine`, :ref:`google images engine`, :ref:`google news engine` and
     :ref:`google videos engine`).
 
-    :param dict param: request parameters of the engine
-
-    :param list lang_list: list of supported languages of the engine
-        :py:obj:`ENGINES_LANGUAGES[engine-name] <searx.data.ENGINES_LANGUAGES>`
-
-    :param dict lang_list: custom aliases for non standard language codes
-        (used when calling :py:func:`searx.utils.match_language`)
+    :param dict param: Request parameters of the engine.  At least
+        a ``searxng_locale`` key should be in the dictionary.
 
-    :param bool supported_any_language: When a language is not specified, the
-        language interpretation is left up to Google to decide how the search
-        results should be delivered.  This argument is ``True`` for the google
-        engine and ``False`` for the other engines (google-images, -news,
-        -scholar, -videos).
+    :param eng_traits: Engine's traits fetched from google preferences
+        (:py:obj:`searx.enginelib.traits.EngineTraits`)
 
     :rtype: dict
     :returns:
         Py-Dictionary with the key/value pairs:
 
         language:
-            Return value from :py:func:`searx.utils.match_language`
+            The language code that is used by google (e.g. ``lang_en`` or
+            ``lang_zh-TW``)
 
         country:
-            The country code (e.g. US, AT, CA, FR, DE ..)
+            The country code that is used by google (e.g. ``US`` or ``TW``)
+
+        locale:
+            A instance of :py:obj:`babel.core.Locale` build from the
+            ``searxng_locale`` value.
 
         subdomain:
             Google subdomain :py:obj:`google_domains` that fits to the country
@@ -168,52 +115,67 @@ def get_lang_info(params, lang_list, custom_aliases, supported_any_language):
             Py-Dictionary with additional request arguments (can be passed to
             :py:func:`urllib.parse.urlencode`).
 
+            - ``hl`` parameter: specifies the interface language of user interface.
+            - ``lr`` parameter: restricts search results to documents written in
+              a particular language.
+            - ``cr`` parameter: restricts search results to documents
+              originating in a particular country.
+            - ``ie`` parameter: sets the character encoding scheme that should
+              be used to interpret the query string ('utf8').
+            - ``oe`` parameter: sets the character encoding scheme that should
+              be used to decode the XML result ('utf8').
+
         headers:
             Py-Dictionary with additional HTTP headers (can be passed to
             request's headers)
+
+            - ``Accept: '*/*``
+
     """
+
     ret_val = {
         'language': None,
         'country': None,
         'subdomain': None,
         'params': {},
         'headers': {},
+        'cookies': {},
+        'locale': None,
     }
 
-    # language ...
-
-    _lang = params['language']
-    _any_language = _lang.lower() == 'all'
-    if _any_language:
-        _lang = 'en-US'
-    language = match_language(_lang, lang_list, custom_aliases)
-    ret_val['language'] = language
-
-    # country ...
+    sxng_locale = params.get('searxng_locale', 'all')
+    try:
+        locale = babel.Locale.parse(sxng_locale, sep='-')
+    except babel.core.UnknownLocaleError:
+        locale = None
 
-    _l = _lang.split('-')
-    if len(_l) == 2:
-        country = _l[1]
-    else:
-        country = _l[0].upper()
-        if country == 'EN':
-            country = 'US'
-    ret_val['country'] = country
+    eng_lang = eng_traits.get_language(sxng_locale, 'lang_en')
+    lang_code = eng_lang.split('_')[-1]  # lang_zh-TW --> zh-TW / lang_en --> en
+    country = eng_traits.get_region(sxng_locale, eng_traits.all_locale)
 
-    # subdomain ...
+    # Test zh_hans & zh_hant --> in the topmost links in the result list of list
+    # TW and HK you should a find wiktionary.org zh_hant link.  In the result
+    # list of zh-CN should not be no hant link instead you should find
+    # zh.m.wikipedia.org/zh somewhere in the top.
 
-    ret_val['subdomain'] = 'www.' + google_domains.get(country.upper(), 'google.com')
+    # '!go 日 :zh-TW' --> https://zh.m.wiktionary.org/zh-hant/%E6%97%A5
+    # '!go 日 :zh-CN' --> https://zh.m.wikipedia.org/zh/%E6%97%A5
 
-    # params & headers
-
-    lang_country = '%s-%s' % (language, country)  # (en-US, en-EN, de-DE, de-AU, fr-FR ..)
+    ret_val['language'] = eng_lang
+    ret_val['country'] = country
+    ret_val['locale'] = locale
+    ret_val['subdomain'] = eng_traits.custom['supported_domains'].get(country.upper(), 'www.google.com')
 
     # hl parameter:
-    #   https://developers.google.com/custom-search/docs/xml_results#hlsp The
-    # Interface Language:
+    #   The hl parameter specifies the interface language (host language) of
+    #   your user interface. To improve the performance and the quality of your
+    #   search results, you are strongly encouraged to set this parameter
+    #   explicitly.
+    #   https://developers.google.com/custom-search/docs/xml_results#hlsp
+    # The Interface Language:
     #   https://developers.google.com/custom-search/docs/xml_results_appendices#interfaceLanguages
 
-    ret_val['params']['hl'] = lang_list.get(lang_country, language)
+    ret_val['params']['hl'] = lang_code
 
     # lr parameter:
     #   The lr (language restrict) parameter restricts search results to
@@ -221,22 +183,72 @@ def get_lang_info(params, lang_list, custom_aliases, supported_any_language):
     #   https://developers.google.com/custom-search/docs/xml_results#lrsp
     #   Language Collection Values:
     #   https://developers.google.com/custom-search/docs/xml_results_appendices#languageCollections
+    #
+    # To select 'all' languages an empty 'lr' value is used.
+    #
+    # Different to other google services, Google Schloar supports to select more
+    # than one language. The languages are seperated by a pipe '|' (logical OR).
+    # By example: &lr=lang_zh-TW%7Clang_de selects articles written in
+    # traditional chinese OR german language.
 
-    if _any_language and supported_any_language:
+    ret_val['params']['lr'] = eng_lang
+    if sxng_locale == 'all':
+        ret_val['params']['lr'] = ''
 
-        # interpretation is left up to Google (based on whoogle)
-        #
-        # - add parameter ``source=lnt``
-        # - don't use parameter ``lr``
-        # - don't add a ``Accept-Language`` HTTP header.
+    # cr parameter:
+    #   The cr parameter restricts search results to documents originating in a
+    #   particular country.
+    #   https://developers.google.com/custom-search/docs/xml_results#crsp
 
-        ret_val['params']['source'] = 'lnt'
+    ret_val['params']['cr'] = 'country' + country
+    if sxng_locale == 'all':
+        ret_val['params']['cr'] = ''
 
-    else:
+    # gl parameter: (mandatory by Geeogle News)
+    #   The gl parameter value is a two-letter country code. For WebSearch
+    #   results, the gl parameter boosts search results whose country of origin
+    #   matches the parameter value. See the Country Codes section for a list of
+    #   valid values.
+    #   Specifying a gl parameter value in WebSearch requests should improve the
+    #   relevance of results. This is particularly true for international
+    #   customers and, even more specifically, for customers in English-speaking
+    #   countries other than the United States.
+    #   https://developers.google.com/custom-search/docs/xml_results#glsp
+
+    ret_val['params']['gl'] = country
+
+    # ie parameter:
+    #   The ie parameter sets the character encoding scheme that should be used
+    #   to interpret the query string. The default ie value is latin1.
+    #   https://developers.google.com/custom-search/docs/xml_results#iesp
+
+    ret_val['params']['ie'] = 'utf8'
+
+    # oe parameter:
+    #   The oe parameter sets the character encoding scheme that should be used
+    #   to decode the XML result. The default oe value is latin1.
+    #   https://developers.google.com/custom-search/docs/xml_results#oesp
+
+    ret_val['params']['oe'] = 'utf8'
+
+    # num parameter:
+    #   The num parameter identifies the number of search results to return.
+    #   The default num value is 10, and the maximum value is 20. If you request
+    #   more than 20 results, only 20 results will be returned.
+    #   https://developers.google.com/custom-search/docs/xml_results#numsp
+
+    # HINT: seems to have no effect (tested in google WEB & Images)
+    # ret_val['params']['num'] = 20
+
+    # HTTP headers
+
+    ret_val['headers']['Accept'] = '*/*'
 
-        # restricts search results to documents written in a particular
-        # language.
-        ret_val['params']['lr'] = "lang_" + lang_list.get(lang_country, language)
+    # Cookies
+
+    # - https://github.com/searxng/searxng/pull/1679#issuecomment-1235432746
+    # - https://github.com/searxng/searxng/issues/1555
+    ret_val['cookies']['CONSENT'] = "YES+"
 
     return ret_val
 
@@ -248,33 +260,34 @@ def detect_google_sorry(resp):
 
 def request(query, params):
     """Google search request"""
-
+    # pylint: disable=line-too-long
     offset = (params['pageno'] - 1) * 10
-
-    lang_info = get_lang_info(params, supported_languages, language_aliases, True)
-
-    additional_parameters = {}
-    if use_mobile_ui:
-        additional_parameters = {
-            'asearch': 'arc',
-            'async': 'use_ac:true,_fmt:prog',
-        }
+    google_info = get_google_info(params, traits)
 
     # https://www.google.de/search?q=corona&hl=de&lr=lang_de&start=0&tbs=qdr%3Ad&safe=medium
     query_url = (
         'https://'
-        + lang_info['subdomain']
+        + google_info['subdomain']
         + '/search'
         + "?"
         + urlencode(
             {
                 'q': query,
-                **lang_info['params'],
-                'ie': "utf8",
-                'oe': "utf8",
-                'start': offset,
+                **google_info['params'],
                 'filter': '0',
-                **additional_parameters,
+                'start': offset,
+                # 'vet': '12ahUKEwik3ZbIzfn7AhXMX_EDHbUDBh0QxK8CegQIARAC..i',
+                # 'ved': '2ahUKEwik3ZbIzfn7AhXMX_EDHbUDBh0Q_skCegQIARAG',
+                # 'cs' : 1,
+                # 'sa': 'N',
+                # 'yv': 3,
+                # 'prmd': 'vin',
+                # 'ei': 'GASaY6TxOcy_xc8PtYeY6AE',
+                # 'sa': 'N',
+                # 'sstk': 'AcOHfVkD7sWCSAheZi-0tx_09XDO55gTWY0JNq3_V26cNN-c8lfD45aZYPI8s_Bqp8s57AHz5pxchDtAGCA_cikAWSjy9kw3kgg'
+                # formally known as use_mobile_ui
+                'asearch': 'arc',
+                'async': UI_ASYNC,
             }
         )
     )
@@ -285,25 +298,45 @@ def request(query, params):
         query_url += '&' + urlencode({'safe': filter_mapping[params['safesearch']]})
     params['url'] = query_url
 
-    params['cookies']['CONSENT'] = "YES+"
-    params['headers'].update(lang_info['headers'])
-    if use_mobile_ui:
-        params['headers']['Accept'] = '*/*'
-    else:
-        params['headers']['Accept'] = 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8'
-
+    params['cookies'] = google_info['cookies']
+    params['headers'].update(google_info['headers'])
     return params
 
 
+# (function(){var s='data:image/jpeg;base64,/9j/4AAQ ...
+# ... DX/Ff5XSpSgdU32xSlKDJ//9k\x3d';var ii=['dimg_21'];_setImagesSrc(ii,s);})();
+RE_DATA_IMAGE = re.compile(r"'(data:image[^']*)'[^']*ii=\['([^']*)'\];_setImagesSrc")
+
+
+def _parse_data_images(dom):
+    data_image_map = {}
+    for _script in eval_xpath_list(dom, "//script[@nonce]"):
+        script = _script.text
+        if not script:
+            continue
+        script = RE_DATA_IMAGE.search(script)
+        if not script:
+            continue
+        data_image_map[script.group(2)] = script.group(1).replace(r'\x3d', '=')
+    logger.debug('data:image objects --> %s', list(data_image_map.keys()))
+    return data_image_map
+
+
 def response(resp):
     """Get response from google's search request"""
-
+    # pylint: disable=too-many-branches, too-many-statements
     detect_google_sorry(resp)
 
     results = []
 
     # convert the text to dom
     dom = html.fromstring(resp.text)
+
+    data_image_map = {}
+    if '_fmt:html' in UI_ASYNC:
+        # in this format images are embedded by a bse64 encoded 'data:image'
+        data_image_map = _parse_data_images(dom)
+
     # results --> answer
     answer_list = eval_xpath(dom, '//div[contains(@class, "LGOjhe")]')
     if answer_list:
@@ -312,20 +345,9 @@ def response(resp):
     else:
         logger.debug("did not find 'answer'")
 
-        # results --> number_of_results
-        if not use_mobile_ui:
-            try:
-                _txt = eval_xpath_getindex(dom, '//div[@id="result-stats"]//text()', 0)
-                _digit = ''.join([n for n in _txt if n.isdigit()])
-                number_of_results = int(_digit)
-                results.append({'number_of_results': number_of_results})
-            except Exception as e:  # pylint: disable=broad-except
-                logger.debug("did not 'number_of_results'")
-                logger.error(e, exc_info=True)
-
     # parse results
 
-    for result in eval_xpath_list(dom, results_xpath):
+    for result in eval_xpath_list(dom, results_xpath):  # pylint: disable=too-many-nested-blocks
 
         # google *sections*
         if extract_text(eval_xpath(result, g_section_with_header)):
@@ -342,13 +364,31 @@ def response(resp):
             url = eval_xpath_getindex(result, href_xpath, 0, None)
             if url is None:
                 continue
-            content = extract_text(eval_xpath_getindex(result, content_xpath, 0, default=None), allow_none=True)
-            if content is None:
+
+            content = []
+            img_list = []
+            for content_feature in eval_xpath(result, content_xpath):
+                val = content_feature.attrib['data-content-feature']
+                if val in ['1', '2']:
+                    txt = extract_text(content_feature, allow_none=True)
+                    if txt:
+                        content.append(txt)
+                elif '0' in val:
+                    img = content_feature.xpath('.//img/@src')
+                    if img:
+                        img = img[0]
+                        if img.startswith('data:image'):
+                            img_id = content_feature.xpath('.//img/@id')
+                            if img_id:
+                                img = data_image_map.get(img_id[0])
+                        img_list.append(img)
+
+            if not content:
                 logger.debug('ignoring item from the result_xpath list: missing content of title "%s"', title)
                 continue
-
-            logger.debug('add link to results: %s', title)
-            results.append({'url': url, 'title': title, 'content': content})
+            content = ' / '.join(content)
+            img_src = img_list[0] if img_list else None
+            results.append({'url': url, 'title': title, 'content': content, 'img_src': img_src})
 
         except Exception as e:  # pylint: disable=broad-except
             logger.error(e, exc_info=True)
@@ -364,18 +404,6 @@ def response(resp):
 
 
 # get supported languages from their site
-def _fetch_supported_languages(resp):
-    ret_val = {}
-    dom = html.fromstring(resp.text)
-
-    radio_buttons = eval_xpath_list(dom, '//*[@id="langSec"]//input[@name="lr"]')
-
-    for x in radio_buttons:
-        name = x.get("data-name")
-        code = x.get("value").split('_')[-1]
-        ret_val[code] = {"name": name}
-
-    return ret_val
 
 
 skip_countries = [
@@ -404,25 +432,21 @@ skip_countries = [
 ]
 
 
-def fetch_traits(engine_traits: EngineTraits):
+def fetch_traits(engine_traits: EngineTraits, add_domains: bool = True):
     """Fetch languages from Google."""
-    # pylint: disable=import-outside-toplevel
-
-    engine_traits.data_type = 'supported_languages'  # deprecated
+    # pylint: disable=import-outside-toplevel, too-many-branches
 
-    import babel
-    import babel.languages
-    from searx import network
-    from searx.locales import language_tag, region_tag, get_offical_locales
+    engine_traits.custom['supported_domains'] = {}
 
     resp = network.get('https://www.google.com/preferences')
     if not resp.ok:
-        print("ERROR: response from Google is not OK.")
+        raise RuntimeError("Response from Google's preferences is not OK.")
 
     dom = html.fromstring(resp.text)
 
-    lang_map = {'no': 'nb'}
+    # supported language codes
 
+    lang_map = {'no': 'nb'}
     for x in eval_xpath_list(dom, '//*[@id="langSec"]//input[@name="lr"]'):
 
         eng_lang = x.get("value").split('_')[-1]
@@ -443,6 +467,8 @@ def fetch_traits(engine_traits: EngineTraits):
     # alias languages
     engine_traits.languages['zh'] = 'lang_zh-CN'
 
+    # supported region codes
+
     for x in eval_xpath_list(dom, '//*[@name="region"]/..//input[@name="region"]'):
         eng_country = x.get("value")
 
@@ -459,4 +485,26 @@ def fetch_traits(engine_traits: EngineTraits):
             continue
 
         for sxng_locale in sxng_locales:
-            engine_traits.regions[region_tag(sxng_locale)] = 'country' + eng_country
+            engine_traits.regions[region_tag(sxng_locale)] = eng_country
+
+    # alias regions
+    engine_traits.regions['zh-CN'] = 'HK'
+
+    # supported domains
+
+    if add_domains:
+        resp = network.get('https://www.google.com/supported_domains')
+        if not resp.ok:
+            raise RuntimeError("Response from https://www.google.com/supported_domains is not OK.")
+
+        for domain in resp.text.split():
+            domain = domain.strip()
+            if not domain or domain in [
+                '.google.com',
+            ]:
+                continue
+            region = domain.split('.')[-1].upper()
+            engine_traits.custom['supported_domains'][region] = 'www' + domain
+            if region == 'HK':
+                # There is no google.cn, we use .com.hk for zh-CN
+                engine_traits.custom['supported_domains']['CN'] = 'www' + domain