Markus Zolliker
e735ebe5f9
- use gethostbyaddr only in case of numeric IP - hard wired reverse CNAME (network alias) for linse-c
36 lines
1.0 KiB
Python
36 lines
1.0 KiB
Python
import re
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import socket
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# sorry for hardwiring this ... there is no CNAME reverse lookup!
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# taking the original address as unique name would need a call to
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# gethostbyaddr, which might take some time - also not what we want
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reverse_alias = {
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'pc15139': 'linse-c',
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'pc16392': 'linse-a',
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}
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def normalizeuri(uri):
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host, sep, port = uri.partition(':')
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if host[0].isdigit():
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try:
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socket.setdefaulttimeout(1)
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host = socket.gethostbyaddr(host)[0].split('.', 1)[0]
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except socket.gaierror:
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pass # keep numbered IP
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finally:
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socket.setdefaulttimeout(None)
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else:
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host = host.split('.',1 )[0]
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if host == 'localhost':
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host = socket.gethostname()
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else:
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# this resolves CNAME entries (network aliases):
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host = reverse_alias.get(host, host)
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# strip appended IP when a host is registered twice (at PSI):
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match = re.match(r'([^-]+)-129129\d{6}$', host)
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host = match.group(1) if match else host
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return f'{host}{sep}{port}'
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