[fix] update_external_bangs: BANGS_URL 'https://duckduckgo.com/bang.js'

JSON file which contains the bangs / there is no longer a versioning of this
file.

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

searxng_extra/update/update_external_bangs.py

@@ -2,50 +2,42 @@
 # lint: pylint
 # SPDX-License-Identifier: AGPL-3.0-or-later
 """Update :origin:`searx/data/external_bangs.json` using the duckduckgo bangs
-(:origin:`CI Update data ... <.github/workflows/data-update.yml>`).
+from :py:obj:`BANGS_URL`.
 
-https://duckduckgo.com/newbang loads:
-
-* a javascript which provides the bang version ( https://duckduckgo.com/bv1.js )
-* a JSON file which contains the bangs ( https://duckduckgo.com/bang.v260.js for example )
-
-This script loads the javascript, then the bangs.
-
-The javascript URL may change in the future ( for example
-https://duckduckgo.com/bv2.js ), but most probably it will requires to update
-RE_BANG_VERSION
+- :origin:`CI Update data ... <.github/workflows/data-update.yml>`
 
 """
-# pylint: disable=C0116
 
+from pathlib import Path
 import json
-import re
-from os.path import join
 
 import httpx
 
-from searx import searx_dir  # pylint: disable=E0401 C0413
+from searx import searx_dir
 from searx.external_bang import LEAF_KEY
 
-# from https://duckduckgo.com/newbang
-URL_BV1 = 'https://duckduckgo.com/bv1.js'
-RE_BANG_VERSION = re.compile(r'\/bang\.v([0-9]+)\.js')
+
+BANGS_URL = 'https://duckduckgo.com/bang.js'
+"""JSON file which contains the bangs."""
+
+BANGS_DATA_FILE = Path(searx_dir) / 'data' / 'external_bangs.json'
+
 HTTPS_COLON = 'https:'
 HTTP_COLON = 'http:'
 
 
-def get_bang_url():
-    response = httpx.get(URL_BV1)
+def main():
+    print(f'fetch bangs from {BANGS_URL}')
+    response = httpx.get(BANGS_URL)
     response.raise_for_status()
-
-    r = RE_BANG_VERSION.findall(response.text)
-    return f'https://duckduckgo.com/bang.v{r[0]}.js', r[0]
-
-
-def fetch_ddg_bangs(url):
-    response = httpx.get(url)
-    response.raise_for_status()
-    return json.loads(response.content.decode())
+    ddg_bangs = json.loads(response.content.decode())
+    trie = parse_ddg_bangs(ddg_bangs)
+    output = {
+        'version': 0,
+        'trie': trie,
+    }
+    with open(BANGS_DATA_FILE, 'w', encoding="utf8") as f:
+        json.dump(output, f, sort_keys=True, ensure_ascii=False, indent=4)
 
 
 def merge_when_no_leaf(node):
@@ -151,13 +143,5 @@ def parse_ddg_bangs(ddg_bangs):
     return bang_trie
 
 
-def get_bangs_filename():
-    return join(join(searx_dir, "data"), "external_bangs.json")
-
-
 if __name__ == '__main__':
-    bangs_url, bangs_version = get_bang_url()
-    print(f'fetch bangs from {bangs_url}')
-    output = {'version': bangs_version, 'trie': parse_ddg_bangs(fetch_ddg_bangs(bangs_url))}
-    with open(get_bangs_filename(), 'w', encoding="utf8") as fp:
-        json.dump(output, fp, ensure_ascii=False, indent=4)
+    main()