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certbot_util.py
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certbot_util.py
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# certbot_util -- adaptation of certbot_nginx name matching functions for VyOS
# https://github.com/certbot/certbot/blob/master/LICENSE.txt
from certbot_nginx import parser
NAME_RANK = 0
START_WILDCARD_RANK = 1
END_WILDCARD_RANK = 2
REGEX_RANK = 3
def _rank_matches_by_name(server_block_list, target_name):
"""Returns a ranked list of server_blocks that match target_name.
Adapted from the function of the same name in
certbot_nginx.NginxConfigurator
"""
matches = []
for server_block in server_block_list:
name_type, name = parser.get_best_match(target_name,
server_block['name'])
if name_type == 'exact':
matches.append({'vhost': server_block,
'name': name,
'rank': NAME_RANK})
elif name_type == 'wildcard_start':
matches.append({'vhost': server_block,
'name': name,
'rank': START_WILDCARD_RANK})
elif name_type == 'wildcard_end':
matches.append({'vhost': server_block,
'name': name,
'rank': END_WILDCARD_RANK})
elif name_type == 'regex':
matches.append({'vhost': server_block,
'name': name,
'rank': REGEX_RANK})
return sorted(matches, key=lambda x: x['rank'])
def _select_best_name_match(matches):
"""Returns the best name match of a ranked list of server_blocks.
Adapted from the function of the same name in
certbot_nginx.NginxConfigurator
"""
if not matches:
return None
elif matches[0]['rank'] in [START_WILDCARD_RANK, END_WILDCARD_RANK]:
rank = matches[0]['rank']
wildcards = [x for x in matches if x['rank'] == rank]
return max(wildcards, key=lambda x: len(x['name']))['vhost']
else:
return matches[0]['vhost']
def choose_server_block(server_block_list, target_name):
matches = _rank_matches_by_name(server_block_list, target_name)
server_blocks = [x for x in [_select_best_name_match(matches)]
if x is not None]
return server_blocks

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