asyncio: get list of connected clients

[DmitryVinokurov]

BPO	31094
Nosy	@asvetlov, @1st1
PRs	bpo-31904 : skip test_cmd_line case for VxWorks doesn't support preexec #12648

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2017-12-19.06:20:46.161>
created_at = <Date 2017-08-01.05:07:44.081>
labels = ['type-feature', 'expert-asyncio']
title = 'asyncio: get list of connected clients'
updated_at = <Date 2019-04-17.15:57:11.590>
user = 'https://bugs.python.org/DmitryVinokurov'

bugs.python.org fields:

activity = <Date 2019-04-17.15:57:11.590>
actor = 'lzhao'
assignee = 'none'
closed = True
closed_date = <Date 2017-12-19.06:20:46.161>
closer = 'asvetlov'
components = ['asyncio']
creation = <Date 2017-08-01.05:07:44.081>
creator = 'Dmitry Vinokurov'
dependencies = []
files = []
hgrepos = []
issue_num = 31094
keywords = []
message_count = 2.0
messages = ['299598', '308616']
nosy_count = 3.0
nosy_names = ['asvetlov', 'yselivanov', 'Dmitry Vinokurov']
pr_nums = ['12648']
priority = 'normal'
resolution = 'wont fix'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue31094'
versions = ['Python 3.5']

[DmitryVinokurov]

Hi!

I'm using python-opcua and wonder if it is possible to get list of clients connected to running server? I've asked such question in python-opcua repo FreeOpcUa/python-opcua#480 and developers redirected me here.

Thanks in advance

[asvetlov]

This tracker is not the best place for questions about development *with* Python -- it is for questions for development *of* Python itself.
Please use resources like StackOverflow next time.

asyncio.Server.sockets is a list of connected socket objects -- but usually Protocol implementation handles a list of alive clients separately, protocol.connection_made() and protocol.connection_lost() allows to do it easy.