Merge a1a9156961 into 58320222e2

searx/data/__init__.py

@@ -7,21 +7,29 @@
 
 __all__ = [
     'ENGINE_TRAITS',
-    'CURRENCIES',
     'USER_AGENTS',
     'EXTERNAL_URLS',
     'WIKIDATA_UNITS',
     'EXTERNAL_BANGS',
-    'OSM_KEYS_TAGS',
-    'ENGINE_DESCRIPTIONS',
     'LOCALES',
     'ahmia_blacklist_loader',
+    'fetch_engine_descriptions',
+    'fetch_iso4217_from_user',
+    'fetch_name_from_iso4217',
+    'fetch_osm_key_label',
 ]
 
+import re
+import unicodedata
 import json
+import sqlite3
+from typing import Dict, List, Optional
+from functools import lru_cache
+from threading import local
 from pathlib import Path
 
 data_dir = Path(__file__).parent
+data_connection_local = local()
 
 
 def _load(filename):
@@ -29,6 +37,115 @@ def _load(filename):
         return json.load(f)
 
 
+def _get_connection(filename: str) -> sqlite3.Connection:
+    """Return a read only SQLite connection to filename.
+    The filename is relative to searx/data
+
+    Multiple calls to this function in the same thread,
+    already return the same connection.
+    """
+    connection = data_connection_local.__dict__.get(filename)
+    if connection is not None:
+        return connection
+
+    data_filename = str(data_dir / filename)
+    # open database in read only mode
+    data_connection = sqlite3.connect(f'file:{data_filename}?mode=ro', uri=True)
+    # https://phiresky.github.io/blog/2020/sqlite-performance-tuning/
+    data_connection.executescript(
+        """
+        pragma temp_store = memory;
+        pragma mmap_size = 30000000000;
+    """
+    )
+
+    data_connection_local.__dict__[filename] = data_connection
+    return data_connection
+
+
+def fetch_engine_descriptions(language) -> Dict[str, List[str]]:
+    """Return engine description and source for each engine name."""
+    res = _get_connection("engine_descriptions.db").execute(
+        "SELECT engine, description, source FROM engine_descriptions WHERE language=?", (language,)
+    )
+    return {result[0]: [result[1], result[2]] for result in res.fetchall()}
+
+
+def _normalize_name(name):
+    name = name.lower().replace('-', ' ').rstrip('s')
+    name = re.sub(' +', ' ', name)
+    return unicodedata.normalize('NFKD', name).lower()
+
+
+@lru_cache(10)
+def fetch_iso4217_from_user(name: str) -> Optional[str]:
+    connection = _get_connection("currencies.db")
+
+    # try the iso4217
+    res = connection.execute("SELECT iso4217 FROM currencies WHERE lower(iso4217)=? LIMIT 1", (name.lower(),))
+    result = res.fetchone()
+    if result:
+        return result[0]
+
+    # try the currency names
+    name = _normalize_name(name)
+    res = connection.execute("SELECT iso4217 FROM currencies WHERE name=?", (name,))
+    result = list(set(result[0] for result in res.fetchall()))
+    if len(result) == 1:
+        return result[0]
+
+    # ambiguity --> return nothing
+    return None
+
+
+@lru_cache(10)
+def fetch_name_from_iso4217(iso4217: str, language: str) -> Optional[str]:
+    res = _get_connection("currencies.db").execute(
+        "SELECT name FROM currencies WHERE iso4217=? AND language=?", (iso4217, language)
+    )
+    result = [result[0] for result in res.fetchall()]
+    if len(result) == 1:
+        return result[0]
+    return None
+
+
+@lru_cache(100)
+def fetch_osm_key_label(key_name: str, language: str) -> Optional[str]:
+    if key_name.startswith('currency:'):
+        # currency:EUR --> get the name from the CURRENCIES variable
+        # see https://wiki.openstreetmap.org/wiki/Key%3Acurrency
+        # and for example https://taginfo.openstreetmap.org/keys/currency:EUR#values
+        # but there is also currency=EUR (currently not handled)
+        # https://taginfo.openstreetmap.org/keys/currency#values
+        currency = key_name.split(':')
+        if len(currency) > 1:
+            label = fetch_name_from_iso4217(currency[1], language)
+            if label:
+                return label
+            return currency[1]
+
+    language = language.lower()
+    language_short = language.split('-')[0]
+    res = _get_connection("osm_keys_tags.db").execute(
+        "SELECT language, label FROM osm_keys WHERE name=? AND language in (?, ?, 'en')",
+        (key_name, language, language_short),
+    )
+    result = {result[0]: result[1] for result in res.fetchall()}
+    return result.get(language) or result.get(language_short) or result.get('en')
+
+
+@lru_cache(100)
+def fetch_osm_tag_label(tag_key: str, tag_value: str, language: str) -> Optional[str]:
+    language = language.lower()
+    language_short = language.split('-')[0]
+    res = _get_connection("osm_keys_tags.db").execute(
+        "SELECT language, label FROM osm_tags WHERE tag_key=? AND tag_value=? AND language in (?, ?, 'en')",
+        (tag_key, tag_value, language, language_short),
+    )
+    result = {result[0]: result[1] for result in res.fetchall()}
+    return result.get(language) or result.get(language_short) or result.get('en')
+
+
 def ahmia_blacklist_loader():
     """Load data from `ahmia_blacklist.txt` and return a list of MD5 values of onion
     names.  The MD5 values are fetched by::
@@ -42,12 +159,9 @@ def ahmia_blacklist_loader():
         return f.read().split()
 
 
-CURRENCIES = _load('currencies.json')
 USER_AGENTS = _load('useragents.json')
 EXTERNAL_URLS = _load('external_urls.json')
 WIKIDATA_UNITS = _load('wikidata_units.json')
 EXTERNAL_BANGS = _load('external_bangs.json')
-OSM_KEYS_TAGS = _load('osm_keys_tags.json')
-ENGINE_DESCRIPTIONS = _load('engine_descriptions.json')
 ENGINE_TRAITS = _load('engine_traits.json')
 LOCALES = _load('locales.json')

searx/data/dumps/README.rst

@@ -0,0 +1,3 @@
+Dumps of the SQLite files in ``searx.data``.
+
+These files are not used by SearXNG, they are here for reference.

searx/engines/apple_maps.py

@@ -6,7 +6,7 @@ from time import time
 from urllib.parse import urlencode
 
 from searx.network import get as http_get
-from searx.engines.openstreetmap import get_key_label
+from searx.data import fetch_osm_key_label
 
 about = {
     "website": 'https://www.apple.com/maps/',
@@ -72,7 +72,7 @@ def response(resp):
             telephone = result['telephone']
             links.append(
                 {
-                    'label': get_key_label('phone', user_language),
+                    'label': fetch_osm_key_label('phone', user_language),
                     'url': 'tel:' + telephone,
                     'url_label': telephone,
                 }
@@ -81,7 +81,7 @@ def response(resp):
             url = result['urls'][0]
             links.append(
                 {
-                    'label': get_key_label('website', user_language),
+                    'label': fetch_osm_key_label('website', user_language),
                     'url': url,
                     'url_label': url,
                 }

searx/engines/openstreetmap.py

@@ -10,7 +10,7 @@ from functools import partial
 
 from flask_babel import gettext
 
-from searx.data import OSM_KEYS_TAGS, CURRENCIES
+from searx.data import fetch_osm_tag_label, fetch_osm_key_label
 from searx.utils import searx_useragent
 from searx.external_urls import get_external_url
 from searx.engines.wikidata import send_wikidata_query, sparql_string_escape, get_thumbnail
@@ -187,14 +187,14 @@ def response(resp):
                 'template': 'map.html',
                 'title': title,
                 'address': address,
-                'address_label': get_key_label('addr', user_language),
+                'address_label': fetch_osm_key_label('addr', user_language),
                 'url': url,
                 'osm': osm,
                 'geojson': geojson,
                 'img_src': img_src,
                 'links': links,
                 'data': data,
-                'type': get_tag_label(result.get('category'), result.get('type', ''), user_language),
+                'type': fetch_osm_tag_label(result.get('category'), result.get('type', ''), user_language),
                 'type_icon': result.get('icon'),
                 'content': '',
                 'longitude': result['lon'],
@@ -367,7 +367,7 @@ def get_links(result, user_language):
             url_label = result.get('wikidata', {}).get('itemLabel') or url_label
         links.append(
             {
-                'label': get_key_label(k, user_language),
+                'label': fetch_osm_key_label(k, user_language),
                 'url': url,
                 'url_label': url_label,
             }
@@ -389,7 +389,7 @@ def get_data(result, user_language, ignore_keys):
             continue
         if get_key_rank(k) is None:
             continue
-        k_label = get_key_label(k, user_language)
+        k_label = fetch_osm_key_label(k, user_language)
         if k_label:
             data.append(
                 {
@@ -412,51 +412,3 @@ def get_key_rank(k):
         # "payment:*" in KEY_ORDER matches "payment:cash", "payment:debit card", etc...
         key_rank = KEY_RANKS.get(k.split(':')[0] + ':*')
     return key_rank
-
-
-def get_label(labels, lang):
-    """Get label from labels in OSM_KEYS_TAGS
-
-    in OSM_KEYS_TAGS, labels have key == '*'
-    """
-    tag_label = labels.get(lang.lower())
-    if tag_label is None:
-        # example: if 'zh-hk' is not found, check 'zh'
-        tag_label = labels.get(lang.split('-')[0])
-    if tag_label is None and lang != 'en':
-        # example: if 'zh' is not found, check 'en'
-        tag_label = labels.get('en')
-    if tag_label is None and len(labels.values()) > 0:
-        # example: if still not found, use the first entry
-        tag_label = labels.values()[0]
-    return tag_label
-
-
-def get_tag_label(tag_category, tag_name, lang):
-    """Get tag label from OSM_KEYS_TAGS"""
-    tag_name = '' if tag_name is None else tag_name
-    tag_labels = OSM_KEYS_TAGS['tags'].get(tag_category, {}).get(tag_name, {})
-    return get_label(tag_labels, lang)
-
-
-def get_key_label(key_name, lang):
-    """Get key label from OSM_KEYS_TAGS"""
-    if key_name.startswith('currency:'):
-        # currency:EUR --> get the name from the CURRENCIES variable
-        # see https://wiki.openstreetmap.org/wiki/Key%3Acurrency
-        # and for example https://taginfo.openstreetmap.org/keys/currency:EUR#values
-        # but there is also currency=EUR (currently not handled)
-        # https://taginfo.openstreetmap.org/keys/currency#values
-        currency = key_name.split(':')
-        if len(currency) > 1:
-            o = CURRENCIES['iso4217'].get(currency[1])
-            if o:
-                return get_label(o, lang).lower()
-            return currency[1]
-
-    labels = OSM_KEYS_TAGS['keys']
-    for k in key_name.split(':') + ['*']:
-        labels = labels.get(k)
-        if labels is None:
-            return None
-    return get_label(labels, lang)

searx/search/processors/online_currency.py

@@ -3,33 +3,14 @@
 
 """
 
-import unicodedata
 import re
 
-from searx.data import CURRENCIES
+from searx.data import fetch_iso4217_from_user, fetch_name_from_iso4217
 from .online import OnlineProcessor
 
 parser_re = re.compile('.*?(\\d+(?:\\.\\d+)?) ([^.0-9]+) (?:in|to) ([^.0-9]+)', re.I)
 
 
-def normalize_name(name):
-    name = name.lower().replace('-', ' ').rstrip('s')
-    name = re.sub(' +', ' ', name)
-    return unicodedata.normalize('NFKD', name).lower()
-
-
-def name_to_iso4217(name):
-    name = normalize_name(name)
-    currency = CURRENCIES['names'].get(name, [name])
-    if isinstance(currency, str):
-        return currency
-    return currency[0]
-
-
-def iso4217_to_name(iso4217, language):
-    return CURRENCIES['iso4217'].get(iso4217, {}).get(language, iso4217)
-
-
 class OnlineCurrencyProcessor(OnlineProcessor):
     """Processor class used by ``online_currency`` engines."""
 
@@ -52,14 +33,17 @@ class OnlineCurrencyProcessor(OnlineProcessor):
             amount = float(amount_str)
         except ValueError:
             return None
-        from_currency = name_to_iso4217(from_currency.strip())
-        to_currency = name_to_iso4217(to_currency.strip())
+        from_currency = fetch_iso4217_from_user(from_currency.strip())
+        to_currency = fetch_iso4217_from_user(to_currency.strip())
+
+        if from_currency is None or to_currency is None:
+            return None
 
         params['amount'] = amount
         params['from'] = from_currency
         params['to'] = to_currency
-        params['from_name'] = iso4217_to_name(from_currency, 'en')
-        params['to_name'] = iso4217_to_name(to_currency, 'en')
+        params['from_name'] = fetch_name_from_iso4217(from_currency, 'en')
+        params['to_name'] = fetch_name_from_iso4217(to_currency, 'en')
         return params
 
     def get_default_tests(self):

searx/webapp.py

@@ -58,7 +58,7 @@ from searx import infopage
 from searx import limiter
 from searx.botdetection import link_token
 
-from searx.data import ENGINE_DESCRIPTIONS
+from searx.data import fetch_engine_descriptions
 from searx.results import Timing
 from searx.settings_defaults import OUTPUT_FORMATS
 from searx.settings_loader import get_default_settings_path
@@ -1102,17 +1102,10 @@ def image_proxy():
 @app.route('/engine_descriptions.json', methods=['GET'])
 def engine_descriptions():
     locale = get_locale().split('_')[0]
-    result = ENGINE_DESCRIPTIONS['en'].copy()
+    result = fetch_engine_descriptions('en')
     if locale != 'en':
-        for engine, description in ENGINE_DESCRIPTIONS.get(locale, {}).items():
+        for engine, description in fetch_engine_descriptions(locale).items():
             result[engine] = description
-    for engine, description in result.items():
-        if len(description) == 2 and description[1] == 'ref':
-            ref_engine, ref_lang = description[0].split(':')
-            description = ENGINE_DESCRIPTIONS[ref_lang][ref_engine]
-        if isinstance(description, str):
-            description = [description, 'wikipedia']
-        result[engine] = description
 
     # overwrite by about:description (from settings)
     for engine_name, engine_mod in engines.items():

searxng_extra/update/update_currencies.py

@@ -9,15 +9,20 @@ Output file: :origin:`searx/data/currencies.json` (:origin:`CI Update data ...
 
 # pylint: disable=invalid-name
 
+import csv
 import re
 import unicodedata
-import json
+import sqlite3
+from pathlib import Path
 
+from searx.network import set_timeout_for_thread
 from searx.locales import LOCALE_NAMES, locales_initialize
 from searx.engines import wikidata, set_loggers
 from searx.data import data_dir
 
-DATA_FILE = data_dir / 'currencies.json'
+DATABASE_FILE = data_dir / 'currencies.db'
+CSV_FILE = data_dir / 'dumps' / 'currencies.csv'
+
 
 set_loggers(wikidata, 'wikidata')
 locales_initialize()
@@ -75,57 +80,45 @@ def _normalize_name(name):
     return name
 
 
-def add_currency_name(db, name, iso4217, normalize_name=True):
-    db_names = db['names']
-
+def add_entry(db, language, iso4217, name, normalize_name=True):
     if normalize_name:
         name = _normalize_name(name)
 
-    iso4217_set = db_names.setdefault(name, [])
-    if iso4217 not in iso4217_set:
-        iso4217_set.insert(0, iso4217)
-
-
-def add_currency_label(db, label, iso4217, language):
-    labels = db['iso4217'].setdefault(iso4217, {})
-    labels[language] = label
+    entry = (language, iso4217, name)
+    db.add(entry)
 
 
 def wikidata_request_result_iterator(request):
+    set_timeout_for_thread(60)
     result = wikidata.send_wikidata_query(request.replace('%LANGUAGES_SPARQL%', LANGUAGES_SPARQL))
     if result is not None:
         yield from result['results']['bindings']
 
 
 def fetch_db():
-    db = {
-        'names': {},
-        'iso4217': {},
-    }
+    db = set()
 
     for r in wikidata_request_result_iterator(SPARQL_WIKIPEDIA_NAMES_REQUEST):
         iso4217 = r['iso4217']['value']
         article_name = r['article_name']['value']
         article_lang = r['article_name']['xml:lang']
-        add_currency_name(db, article_name, iso4217)
-        add_currency_label(db, article_name, iso4217, article_lang)
+        add_entry(db, article_lang, iso4217, article_name)
 
     for r in wikidata_request_result_iterator(SARQL_REQUEST):
         iso4217 = r['iso4217']['value']
         if 'label' in r:
             label = r['label']['value']
             label_lang = r['label']['xml:lang']
-            add_currency_name(db, label, iso4217)
-            add_currency_label(db, label, iso4217, label_lang)
+            add_entry(db, label_lang, iso4217, label)
 
         if 'alias' in r:
-            add_currency_name(db, r['alias']['value'], iso4217)
+            add_entry(db, "", iso4217, r['alias']['value'])
 
         if 'unicode' in r:
-            add_currency_name(db, r['unicode']['value'], iso4217, normalize_name=False)
+            add_entry(db, "", iso4217, r['unicode']['value'], normalize_name=False)
 
         if 'unit' in r:
-            add_currency_name(db, r['unit']['value'], iso4217, normalize_name=False)
+            add_entry(db, "", iso4217, r['unit']['value'], normalize_name=False)
 
     return db
 
@@ -135,22 +128,33 @@ def main():
     db = fetch_db()
 
     # static
-    add_currency_name(db, "euro", 'EUR')
-    add_currency_name(db, "euros", 'EUR')
-    add_currency_name(db, "dollar", 'USD')
-    add_currency_name(db, "dollars", 'USD')
-    add_currency_name(db, "peso", 'MXN')
-    add_currency_name(db, "pesos", 'MXN')
+    add_entry(db, "", 'EUR', "euro")
+    add_entry(db, "", 'EUR', "euros")
+    add_entry(db, "", 'USD', "dollar")
+    add_entry(db, "", 'USD', "dollars")
+    add_entry(
+        db,
+        "",
+        'MXN',
+        "peso",
+    )
+    add_entry(db, "", 'MXN', "pesos")
 
-    # reduce memory usage:
-    # replace lists with one item by the item.  see
-    # searx.search.processors.online_currency.name_to_iso4217
-    for name in db['names']:
-        if len(db['names'][name]) == 1:
-            db['names'][name] = db['names'][name][0]
-
-    with DATA_FILE.open('w', encoding='utf8') as f:
-        json.dump(db, f, indent=4, sort_keys=True, ensure_ascii=False)
+    db = list(db)
+    db.sort(key=lambda entry: (entry[0], entry[1], entry[2]))
+    Path(DATABASE_FILE).unlink(missing_ok=True)
+    with sqlite3.connect(DATABASE_FILE) as con:
+        cur = con.cursor()
+        cur.execute("CREATE TABLE currencies(language, iso4217, name)")
+        cur.executemany("INSERT INTO currencies VALUES(?, ?, ?)", db)
+        cur.execute("CREATE INDEX index_currencies_iso4217 ON currencies('iso4217')")
+        cur.execute("CREATE INDEX index_currencies_name ON currencies('name')")
+        con.commit()
+    with CSV_FILE.open('w', encoding='utf8') as f:
+        w = csv.writer(f, quoting=csv.QUOTE_NONNUMERIC)
+        w.writerow(["language", "iso4217", "name"])
+        for row in db:
+            w.writerow(row)
 
 
 if __name__ == '__main__':

searxng_extra/update/update_engine_descriptions.py

@@ -9,22 +9,24 @@ Output file: :origin:`searx/data/engine_descriptions.json`.
 
 # pylint: disable=invalid-name, global-statement
 
+import csv
 import json
+import sqlite3
 from urllib.parse import urlparse
-from os.path import join
+from pathlib import Path
 
 from lxml.html import fromstring
 
 from searx.engines import wikidata, set_loggers
 from searx.utils import extract_text, searx_useragent
 from searx.locales import LOCALE_NAMES, locales_initialize, match_locale
-from searx import searx_dir
 from searx.utils import gen_useragent, detect_language
 import searx.search
 import searx.network
 from searx.data import data_dir
 
-DATA_FILE = data_dir / 'engine_descriptions.json'
+DATABASE_FILE = data_dir / 'engine_descriptions.db'
+CSV_FILE = data_dir / 'dumps' / 'engine_descriptions.csv'
 
 set_loggers(wikidata, 'wikidata')
 locales_initialize()
@@ -323,37 +325,32 @@ def fetch_website_descriptions():
             fetch_website_description(engine_name, website)
 
 
-def get_engine_descriptions_filename():
-    return join(join(searx_dir, "data"), "engine_descriptions.json")
-
-
-def get_output():
+def write_db():
     """
-    From descriptions[engine][language] = [description, source]
-    To
+    Erase and write the SQLite database searx/data/engine_descriptions.db :
+    * create one table engine_descriptions
+    * dump write all the values
 
-    * output[language][engine] = description_and_source
-    * description_and_source can be:
-       * [description, source]
-       * description (if source = "wikipedia")
-       * [f"engine:lang", "ref"] (reference to another existing description)
+    Make a JSON dump of the values into engine_descriptions.json
     """
-    output = {locale: {} for locale in LOCALE_NAMES}
-
-    seen_descriptions = {}
-
-    for engine_name, lang_descriptions in descriptions.items():
-        for language, description in lang_descriptions.items():
-            if description[0] in seen_descriptions:
-                ref = seen_descriptions[description[0]]
-                description = [f'{ref[0]}:{ref[1]}', 'ref']
-            else:
-                seen_descriptions[description[0]] = (engine_name, language)
-                if description[1] == 'wikipedia':
-                    description = description[0]
-            output.setdefault(language, {}).setdefault(engine_name, description)
-
-    return output
+    data = [
+        (language, engine_name, description[0], description[1])
+        for engine_name, lang_descriptions in descriptions.items()
+        for language, description in lang_descriptions.items()
+    ]
+    data.sort(key=lambda item: (item[0], item[1]))
+    Path(DATABASE_FILE).unlink(missing_ok=True)
+    with sqlite3.connect(DATABASE_FILE) as con:
+        cur = con.cursor()
+        cur.execute("CREATE TABLE engine_descriptions(language, engine, description, source)")
+        cur.executemany("INSERT INTO engine_descriptions VALUES(?, ?, ?, ?)", data)
+        cur.execute("CREATE INDEX index_engine_descriptions ON engine_descriptions('language')")
+        con.commit()
+    with CSV_FILE.open('w', encoding="utf8") as f:
+        w = csv.writer(f, quoting=csv.QUOTE_NONNUMERIC)
+        w.writerow(["language", "engine", "description", "source"])
+        for row in data:
+            w.writerow(row)
 
 
 def main():
@@ -361,10 +358,7 @@ def main():
     fetch_wikidata_descriptions()
     fetch_wikipedia_descriptions()
     fetch_website_descriptions()
-
-    output = get_output()
-    with DATA_FILE.open('w', encoding='utf8') as f:
-        f.write(json.dumps(output, indent=1, separators=(',', ':'), sort_keys=True, ensure_ascii=False))
+    write_db()
 
 
 if __name__ == "__main__":

searxng_extra/update/update_osm_keys_tags.py

@@ -42,8 +42,9 @@ Output file: :origin:`searx/data/osm_keys_tags` (:origin:`CI Update data ...
 
 """
 
-import json
-import collections
+import csv
+import sqlite3
+from pathlib import Path
 
 from searx.network import set_timeout_for_thread
 from searx.engines import wikidata, set_loggers
@@ -51,7 +52,9 @@ from searx.sxng_locales import sxng_locales
 from searx.engines.openstreetmap import get_key_rank, VALUE_TO_LINK
 from searx.data import data_dir
 
-DATA_FILE = data_dir / 'osm_keys_tags.json'
+DATABASE_FILE = data_dir / 'osm_keys_tags.db'
+CSV_KEYS_FILE = data_dir / 'dumps' / 'osm_keys.csv'
+CSV_TAGS_FILE = data_dir / 'dumps' / 'osm_tags.csv'
 
 set_loggers(wikidata, 'wikidata')
 
@@ -78,42 +81,39 @@ ORDER BY ?key ?item ?itemLabel
 
 LANGUAGES = [l[0].lower() for l in sxng_locales]
 
-PRESET_KEYS = {
-    ('wikidata',): {'en': 'Wikidata'},
-    ('wikipedia',): {'en': 'Wikipedia'},
-    ('email',): {'en': 'Email'},
-    ('facebook',): {'en': 'Facebook'},
-    ('fax',): {'en': 'Fax'},
-    ('internet_access', 'ssid'): {'en': 'Wi-Fi'},
-}
+PRESET_KEYS = [
+    ["wikidata", "en", "Wikidata"],
+    ["wikipedia", "en", "Wikipedia"],
+    ["email", "en", "email"],
+    ["facebook", "en", "facebook"],
+    ["fax", "en", "Fax"],
+    ["internet_access:ssid", "en", "Wi-Fi"],
+]
 
 INCLUDED_KEYS = {('addr',)}
 
 
-def get_preset_keys():
-    results = collections.OrderedDict()
-    for keys, value in PRESET_KEYS.items():
-        r = results
-        for k in keys:
-            r = r.setdefault(k, {})
-        r.setdefault('*', value)
-    return results
-
-
 def get_keys():
-    results = get_preset_keys()
+    result_keys = set()
+    results = PRESET_KEYS.copy()
     response = wikidata.send_wikidata_query(SPARQL_KEYS_REQUEST)
 
     for key in response['results']['bindings']:
         keys = key['key']['value'].split(':')[1:]
+        label = key['itemLabel']['value'].lower()
+        lang = key['itemLabel']['xml:lang']
+
+        if lang not in LANGUAGES:
+            continue
+
         if keys[0] == 'currency' and len(keys) > 1:
             # special case in openstreetmap.py
             continue
         if keys[0] == 'contact' and len(keys) > 1:
-            # label for the key "contact.email" is "Email"
-            # whatever the language
-            r = results.setdefault('contact', {})
-            r[keys[1]] = {'*': {'en': keys[1]}}
+            if lang == "en":
+                # label for the key "contact.email" is "Email"
+                # whatever the language
+                results.append((":".join(keys), "en", keys[1]))
             continue
         if tuple(keys) in PRESET_KEYS:
             # skip presets (already set above)
@@ -125,40 +125,46 @@ def get_keys():
         ):
             # keep only keys that will be displayed by openstreetmap.py
             continue
-        label = key['itemLabel']['value'].lower()
-        lang = key['itemLabel']['xml:lang']
-        r = results
-        for k in keys:
-            r = r.setdefault(k, {})
-        r = r.setdefault('*', {})
-        if lang in LANGUAGES:
-            r.setdefault(lang, label)
+
+        entry = (":".join(keys), lang, label)
+        entry_key = (entry[0], entry[1])
+        if entry_key not in result_keys:
+            results.append(entry)
+            result_keys.add(entry_key)
 
     # special cases
-    results['delivery']['covid19']['*'].clear()
-    for k, v in results['delivery']['*'].items():
-        results['delivery']['covid19']['*'][k] = v + ' (COVID19)'
+    results = [entry for entry in results if entry[0] != 'delivery:covid19']
+    results.extend(
+        [['delivery:covid19', entry[1], entry[2] + ' (COVID19)'] for entry in results if entry[0] == 'delivery']
+    )
 
-    results['opening_hours']['covid19']['*'].clear()
-    for k, v in results['opening_hours']['*'].items():
-        results['opening_hours']['covid19']['*'][k] = v + ' (COVID19)'
+    results = [entry for entry in results if entry[0] != 'opening_hours:covid19']
+    results.extend(
+        [
+            ['opening_hours:covid19', entry[1], entry[2] + ' (COVID19)']
+            for entry in results
+            if entry[0] == 'opening_hours'
+        ]
+    )
 
     return results
 
 
 def get_tags():
-    results = collections.OrderedDict()
+    results = []
     response = wikidata.send_wikidata_query(SPARQL_TAGS_REQUEST)
     for tag in response['results']['bindings']:
-        tag_names = tag['tag']['value'].split(':')[1].split('=')
-        if len(tag_names) == 2:
-            tag_category, tag_type = tag_names
-        else:
-            tag_category, tag_type = tag_names[0], ''
+        try:
+            tag_key, tag_value = tag['tag']['value'].split('=')
+            if tag_key.startswith("Tag:"):
+                tag_key = tag_key[4:]
+        except ValueError:
+            print("ignore tag", tag['tag']['value'])
+            continue
         label = tag['itemLabel']['value'].lower()
         lang = tag['itemLabel']['xml:lang']
         if lang in LANGUAGES:
-            results.setdefault(tag_category, {}).setdefault(tag_type, {}).setdefault(lang, label)
+            results.append((tag_key, tag_value, lang, label))
     return results
 
 
@@ -206,9 +212,30 @@ def optimize_keys(data):
 if __name__ == '__main__':
 
     set_timeout_for_thread(60)
-    result = {
-        'keys': optimize_keys(get_keys()),
-        'tags': optimize_tags(get_tags()),
-    }
-    with DATA_FILE.open('w', encoding="utf8") as f:
-        json.dump(result, f, indent=4, sort_keys=True, ensure_ascii=False)
+    osm_keys = get_keys()
+    osm_tags = get_tags()
+
+    osm_keys.sort(key=lambda item: (item[0], item[1]))
+    osm_tags.sort(key=lambda item: (item[0], item[1]))
+
+    Path(DATABASE_FILE).unlink(missing_ok=True)
+    with sqlite3.connect(DATABASE_FILE) as con:
+        cur = con.cursor()
+        cur.execute("CREATE TABLE osm_keys(name, language, label)")
+        cur.executemany("INSERT INTO osm_keys VALUES(?, ?, ?)", osm_keys)
+        cur.execute("CREATE INDEX index_osm_keys ON osm_keys('name', 'language')")
+        cur.execute("CREATE TABLE osm_tags(tag_key, tag_value, language, label)")
+        cur.executemany("INSERT INTO osm_tags VALUES(?, ?, ?, ?)", osm_tags)
+        cur.execute("CREATE INDEX index_osm_tags ON osm_tags('tag_key', 'tag_value', 'language')")
+        con.commit()
+
+    with CSV_KEYS_FILE.open('w', encoding="utf8") as f:
+        w = csv.writer(f, quoting=csv.QUOTE_NONNUMERIC)
+        w.writerow(["name", "language", "label"])
+        for row in osm_keys:
+            w.writerow(row)
+    with CSV_TAGS_FILE.open('w', encoding="utf8") as f:
+        w = csv.writer(f, quoting=csv.QUOTE_NONNUMERIC)
+        w.writerow(["tag_key", "tag_value", "language", "label"])
+        for row in osm_tags:
+            w.writerow(row)