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https://github.com/searxng/searxng.git
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fix fetch_langauges to be more accurate
Add languages supported by either all default general engines or 10 engines.
This commit is contained in:
Marc Abonce Seguin
parent
b9d4c0523e
commit
d1eae9359f
5 changed files with 154 additions and 150 deletions
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@ -2,83 +2,40 @@
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# This script generates languages.py from intersecting each engine's supported languages.
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#
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# The country names are obtained from http://api.geonames.org which requires registering as a user.
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#
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# Output files (engines_languages.json and languages.py)
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# are written in current directory to avoid overwriting in case something goes wrong.
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from requests import get
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from lxml.html import fromstring
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from json import loads, dump
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from json import dump
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import io
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from sys import path
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from babel import Locale, UnknownLocaleError
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from babel.languages import get_global
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path.append('../searx') # noqa
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from searx import settings
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from searx.url_utils import urlencode
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from searx.engines import initialize_engines, engines
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# Geonames API for country names.
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geonames_user = '' # ADD USER NAME HERE
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country_names_url = 'http://api.geonames.org/countryInfoJSON?{parameters}'
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# Output files.
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engines_languages_file = 'engines_languages.json'
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languages_file = 'languages.py'
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engines_languages = {}
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# To filter out invalid codes and dialects.
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def valid_code(lang_code):
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# filter invalid codes
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# sl-SL is technically not invalid, but still a mistake
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invalid_codes = ['sl-SL', 'wt-WT', 'jw']
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invalid_countries = ['UK', 'XA', 'XL']
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if lang_code[:2] == 'xx'\
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or lang_code in invalid_codes\
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or lang_code[-2:] in invalid_countries\
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or is_dialect(lang_code):
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return False
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return True
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# Language codes with any additional tags other than language and country.
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def is_dialect(lang_code):
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lang_code = lang_code.split('-')
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if len(lang_code) > 2 or len(lang_code[0]) > 3:
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return True
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if len(lang_code) == 2 and len(lang_code[1]) > 2:
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return True
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return False
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# Get country name in specified language.
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def get_country_name(locale):
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if geonames_user is '':
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return ''
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locale = locale.split('-')
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if len(locale) != 2:
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return ''
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url = country_names_url.format(parameters=urlencode({'lang': locale[0],
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'country': locale[1],
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'username': geonames_user}))
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response = get(url)
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json = loads(response.text)
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content = json.get('geonames', None)
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if content is None or len(content) != 1:
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print("No country name found for " + locale[0] + "-" + locale[1])
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return ''
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return content[0].get('countryName', '')
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# custom fixes for non standard locale codes
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# sl-SL is technically not invalid, but still a mistake
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# TODO: move to respective engines
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locale_fixes = {
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'sl-sl': 'sl-SI',
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'ar-xa': 'ar-SA',
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'es-xl': 'es-419',
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'zh-chs': 'zh-Hans-CN',
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'zh-cht': 'zh-Hant-TW',
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'tzh-tw': 'zh-Hant-TW',
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'tzh-hk': 'zh-Hant-HK'
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}
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# Fetchs supported languages for each engine and writes json file with those.
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def fetch_supported_languages():
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initialize_engines(settings['engines'])
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engines_languages = {}
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for engine_name in engines:
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if hasattr(engines[engine_name], 'fetch_supported_languages'):
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try:
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@ -90,81 +47,134 @@ def fetch_supported_languages():
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with io.open(engines_languages_file, "w", encoding="utf-8") as f:
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dump(engines_languages, f, ensure_ascii=False)
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return engines_languages
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# Get babel Locale object from lang_code if possible.
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def get_locale(lang_code):
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try:
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locale = Locale.parse(lang_code, sep='-')
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return locale
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except (UnknownLocaleError, ValueError):
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return None
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# Append engine_name to list of engines that support locale.
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def add_engine_counter(lang_code, engine_name, languages):
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if lang_code in languages:
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if 'counter' not in languages[lang_code]:
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languages[lang_code]['counter'] = [engine_name]
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elif engine_name not in languages[lang_code]['counter']:
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languages[lang_code]['counter'].append(engine_name)
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# Join all language lists.
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# Iterate all languages supported by each engine.
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def join_language_lists():
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global languages
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# include wikipedia first for more accurate language names
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languages = {code: lang for code, lang
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in engines_languages['wikipedia'].items()
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if valid_code(code)}
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# TODO: Add language names from engine's language list if name not known by babel.
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def join_language_lists(engines_languages):
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language_list = {}
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for engine_name in engines_languages:
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for locale in engines_languages[engine_name]:
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if valid_code(locale):
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# if language is not on list or if it has no name yet
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if locale not in languages or not languages[locale].get('name'):
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if isinstance(engines_languages[engine_name], dict):
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languages[locale] = engines_languages[engine_name][locale]
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else:
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languages[locale] = {}
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for lang_code in engines_languages[engine_name]:
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# add to counter of engines that support given language
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lang = locale.split('-')[0]
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if lang in languages:
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if 'counter' not in languages[lang]:
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languages[lang]['counter'] = [engine_name]
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elif engine_name not in languages[lang]['counter']:
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languages[lang]['counter'].append(engine_name)
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# apply custom fixes if necessary
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if lang_code.lower() in locale_fixes:
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lang_code = locale_fixes[lang_code.lower()]
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# filter list to include only languages supported by most engines
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min_supported_engines = int(0.70 * len(engines_languages))
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languages = {code: lang for code, lang
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in languages.items()
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if len(lang.get('counter', [])) >= min_supported_engines or
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len(languages.get(code.split('-')[0], {}).get('counter', [])) >= min_supported_engines}
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locale = get_locale(lang_code)
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# get locales that have no name or country yet
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for locale in languages.keys():
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# try to get language names
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if not languages[locale].get('name'):
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name = languages.get(locale.split('-')[0], {}).get('name', None)
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if name:
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languages[locale]['name'] = name
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else:
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# filter out locales with no name
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del languages[locale]
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continue
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# ensure that lang_code uses standard language and country codes
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if locale and locale.territory:
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lang_code = locale.language + '-' + locale.territory
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# try to get language name in english
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if not languages[locale].get('english_name'):
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languages[locale]['english_name'] = languages.get(locale.split('-')[0], {}).get('english_name', '')
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# add locale if it's not in list
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if lang_code not in language_list:
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if locale:
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language_list[lang_code] = {'name': locale.get_language_name().title(),
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'english_name': locale.english_name,
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'country': locale.get_territory_name() or ''}
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# try to get country name
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if locale.find('-') > 0 and not languages[locale].get('country'):
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languages[locale]['country'] = get_country_name(locale) or ''
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# also add language without country
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if locale.language not in language_list:
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language_list[locale.language] = {'name': locale.get_language_name().title(),
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'english_name': locale.english_name}
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else:
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language_list[lang_code] = {}
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# count engine for both language_country combination and language alone
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add_engine_counter(lang_code, engine_name, language_list)
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add_engine_counter(lang_code.split('-')[0], engine_name, language_list)
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return language_list
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# Remove countryless language if language is featured in only one country.
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def filter_single_country_languages():
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prev_lang = None
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prev_code = None
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for code in sorted(languages):
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lang = code.split('-')[0]
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if lang == prev_lang:
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# Filter language list so it only includes the most supported languages and countries.
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def filter_language_list(all_languages):
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min_supported_engines = 10
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main_engines = [engine_name for engine_name in engines.keys()
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if 'general' in engines[engine_name].categories and
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engines[engine_name].supported_languages and
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not engines[engine_name].disabled]
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# filter list to include only languages supported by most engines or all default general engines
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filtered_languages = {code: lang for code, lang
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in all_languages.items()
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if (len(lang.get('counter', [])) >= min_supported_engines or
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all(main_engine in lang.get('counter', [])
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for main_engine in main_engines))}
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return filtered_languages
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# Add country codes to languages without one and filter out language codes.
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def assign_country_codes(filtered_languages, all_languages):
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sorted_languages = sorted(all_languages,
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key=lambda lang: len(all_languages[lang].get('counter', [])),
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reverse=True)
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previous_lang = None
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previous_code = None
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countries = 0
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for current_code in sorted(filtered_languages):
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current_lang = current_code.split('-')[0]
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# count country codes per language
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if current_lang == previous_lang:
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countries += 1
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else:
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if prev_lang is not None and countries == 1:
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del languages[prev_lang]
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languages[prev_code]['country'] = ''
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if previous_lang is not None:
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# if language has no single country code
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if countries == 0:
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# try to get country code with most supported engines
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for l in sorted_languages:
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l_parts = l.split('-')
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if len(l_parts) == 2 and l_parts[0] == previous_lang:
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filtered_languages[l] = all_languages[l]
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filtered_languages[l]['country'] = ''
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countries = 1
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break
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if countries == 0:
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# get most likely country code from babel
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subtags = get_global('likely_subtags').get(previous_lang)
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if subtags:
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subtag_parts = subtags.split('_')
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new_code = subtag_parts[0] + '-' + subtag_parts[-1]
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filtered_languages[new_code] = all_languages[previous_lang]
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countries = 1
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if countries == 1:
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# remove countryless version of language if there's only one country
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del filtered_languages[previous_lang]
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if previous_code in filtered_languages:
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filtered_languages[previous_code]['country'] = ''
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countries = 0
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prev_lang = lang
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prev_code = code
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previous_lang = current_lang
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previous_code = current_code
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# Write languages.py.
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def write_languages_file():
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def write_languages_file(languages):
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new_file = open(languages_file, 'wb')
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file_content = '# -*- coding: utf-8 -*-\n'\
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+ '# list of language codes\n'\
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@ -183,7 +193,9 @@ def write_languages_file():
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if __name__ == "__main__":
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fetch_supported_languages()
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join_language_lists()
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filter_single_country_languages()
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write_languages_file()
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initialize_engines(settings['engines'])
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engines_languages = fetch_supported_languages()
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all_languages = join_language_lists(engines_languages)
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filtered_languages = filter_language_list(all_languages)
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assign_country_codes(filtered_languages, all_languages)
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write_languages_file(filtered_languages)
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