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[fix] external bangs: don't overwrite Bangs in data trie

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Bangs with a `*` suffix (e.g. `!!d*`) overwrite Bangs with the same
prefix (e.g. `!!d`) [1].  This can be avoid when a non printable character is
used to tag a LEAF_KEY.

[1] https://github.com/searxng/searxng/pull/740#issuecomment-1010411888

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
This commit is contained in:
Markus Heiser 2022-01-12 18:08:48 +01:00
parent 6d7e86eece
commit 7cdd31440e
3 changed files with 37 additions and 25 deletions
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6
searx/external_bang.py
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@ -2,6 +2,8 @@
from searx.data import EXTERNAL_BANGS
LEAF_KEY = chr(16)
def get_node(external_bangs_db, bang):
node = external_bangs_db['trie']
@ -26,8 +28,8 @@ def get_bang_definition_and_ac(external_bangs_db, bang):
if k.startswith(after):
bang_ac_list.append(before + k)
elif isinstance(node, dict):
bang_definition = node.get('*')
bang_ac_list = [before + k for k in node.keys() if k != '*']
bang_definition = node.get(LEAF_KEY)
bang_ac_list = [before + k for k in node.keys() if k != LEAF_KEY]
elif isinstance(node, str):
bang_definition = node
bang_ac_list = []