New submission from Kevin Burke:
It would be nice to be able to set a timeout for DNS lookups in the event of a
DNS server failure.
1. Set your DNS to something like 123.123.123.123 or any other host that is not
listening for DNS queries on port 53.
2. Run requests.get('http://jsonip.com', timeout=3), or similar using
urllib/http.client/httplib
3. Observe that the wall clock time is 2 minutes or higher.
It's known that a timeout value does not correspond to wall clock time, but
this can be an unexpected cause of latency in http client requests, and is
completely uncontrollable from client code (unless the user resolves DNS
themselves).
For a comparison, Go provides this functionality, see for example
https://code.google.com/p/go/source/browse/src/pkg/net/lookup.go?name=release#55
----------
components: Library (Lib)
messages: 231266
nosy: kevinburke
priority: normal
severity: normal
status: open
title: set a timeout for DNS lookups
type: enhancement
versions: Python 3.5
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Python tracker <[email protected]>
<http://bugs.python.org/issue22889>
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