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[mod] google - get_lang_info add documentataion & comments
BTW: remove obsolete log messages from google engine Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
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Markus Heiser
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1c67b6aece
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1ac3961336
@ -134,42 +134,113 @@ spelling_suggestion_xpath = '//div[@class="med"]/p/a'
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def get_lang_info(params, lang_list, custom_aliases, supported_any_language):
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ret_val = {}
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"""Composing various language properties for the google engines.
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This function is called by the various google engines (google itself,
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google-images, -news, -scholar, -videos).
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:param dict param: request parameters of the engine
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:param list lang_list: list of supported languages of the engine
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:py:obj:`ENGINES_LANGUAGES[engine-name] <searx.data.ENGINES_LANGUAGES>`
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:param dict lang_list: custom aliases for non standard language codes
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(used when calling :py:func:`searx.utils.match_language)
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:param bool supported_any_language: When a language is not specified, the
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language interpretation is left up to Google to decide how the search
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results should be delivered. This argument is ``True`` for the google
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engine and ``False`` for the other engines (google-images, -news,
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-scholar, -videos).
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:rtype: dict
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:returns:
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Py-Dictionary with the key/value pairs:
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language:
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Return value from :py:func:`searx.utils.match_language
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country:
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The country code (e.g. US, AT, CA, FR, DE ..)
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subdomain:
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Google subdomain :py:obj:`google_domains` that fits to the country
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code.
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params:
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Py-Dictionary with additional request arguments (can be passed to
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:py:func:`urllib.parse.urlencode`).
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headers:
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Py-Dictionary with additional HTTP headers (can be passed to
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request's headers)
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"""
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ret_val = {
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'language' : None,
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'country' : None,
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'subdomain' : None,
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'params' : {},
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'headers' : {},
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}
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# language ...
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_lang = params['language']
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_any_language = _lang.lower() == 'all'
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if _any_language:
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_lang = 'en-US'
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language = match_language(_lang, lang_list, custom_aliases)
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ret_val['language'] = language
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# the requested language from params (en, en-US, de, de-AT, fr, fr-CA, ...)
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_l = _lang.split('-')
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# country ...
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# the country code (US, AT, CA)
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_l = _lang.split('-')
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if len(_l) == 2:
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country = _l[1]
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else:
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country = _l[0].upper()
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if country == 'EN':
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country = 'US'
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ret_val['country'] = country
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# the combination (en-US, en-EN, de-DE, de-AU, fr-FR, fr-FR)
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lang_country = '%s-%s' % (language, country)
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# subdomain ...
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# subdomain
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ret_val['subdomain'] = 'www.' + google_domains.get(country.upper(), 'google.com')
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ret_val['params'] = {}
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ret_val['headers'] = {}
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# params & headers
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lang_country = '%s-%s' % (language, country) # (en-US, en-EN, de-DE, de-AU, fr-FR ..)
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# hl parameter:
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# https://developers.google.com/custom-search/docs/xml_results#hlsp The
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# Interface Language:
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# https://developers.google.com/custom-search/docs/xml_results_appendices#interfaceLanguages
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ret_val['params']['hl'] = lang_list.get(lang_country, language)
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# lr parameter:
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# The lr (language restrict) parameter restricts search results to
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# documents written in a particular language.
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# https://developers.google.com/custom-search/docs/xml_results#lrsp
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# Language Collection Values:
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# https://developers.google.com/custom-search/docs/xml_results_appendices#languageCollections
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if _any_language and supported_any_language:
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# based on whoogle
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# interpretation is left up to Google (based on whoogle)
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#
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# - add parameter ``source=lnt``
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# - don't use parameter ``lr``
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# - don't add a ``Accept-Language`` HTTP header.
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ret_val['params']['source'] = 'lnt'
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else:
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# restricts search results to documents written in a particular
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# language.
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ret_val['params']['lr'] = "lang_" + lang_list.get(lang_country, language)
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# Accept-Language: fr-CH, fr;q=0.8, en;q=0.6, *;q=0.5
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ret_val['headers']['Accept-Language'] = ','.join([
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lang_country,
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@ -178,18 +249,6 @@ def get_lang_info(params, lang_list, custom_aliases, supported_any_language):
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'*;q=0.5',
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])
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# lr parameter:
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# https://developers.google.com/custom-search/docs/xml_results#lrsp
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# Language Collection Values:
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# https://developers.google.com/custom-search/docs/xml_results_appendices#languageCollections
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ret_val['params']['lr'] = "lang_" + lang_list.get(lang_country, language)
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ret_val['params']['hl'] = lang_list.get(lang_country, language)
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# hl parameter:
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# https://developers.google.com/custom-search/docs/xml_results#hlsp The
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# Interface Language:
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# https://developers.google.com/custom-search/docs/xml_results_appendices#interfaceLanguages
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return ret_val
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def detect_google_sorry(resp):
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@ -220,11 +279,8 @@ def request(query, params):
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query_url += '&' + urlencode({'tbs': 'qdr:' + time_range_dict[params['time_range']]})
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if params['safesearch']:
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query_url += '&' + urlencode({'safe': filter_mapping[params['safesearch']]})
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logger.debug("query_url --> %s", query_url)
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params['url'] = query_url
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logger.debug("HTTP header Accept-Language --> %s", lang_info.get('Accept-Language'))
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params['headers'].update(lang_info['headers'])
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params['headers']['Accept'] = (
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'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8'
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