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annotate planemo/lib/python3.7/site-packages/galaxy/util/sockets.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
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1 import random
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2 import socket
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3
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4 from galaxy.util import commands
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5
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6
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7 def get_ip():
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8 s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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9 try:
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10 # doesn't even have to be reachable
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11 s.connect(('10.255.255.255', 1))
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12 ip = s.getsockname()[0]
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13 except Exception:
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14 ip = None
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15 finally:
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16 s.close()
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17 return ip
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19
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20 def unused_port(range=None):
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21 if range:
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22 return __unused_port_on_range(range)
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23 else:
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24 return __unused_port_rangeless()
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25
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26
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27 def __unused_port_rangeless():
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28 # TODO: Allow ranges (though then need to guess and check)...
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29 s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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30 s.bind(('localhost', 0))
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31 addr, port = s.getsockname()
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32 s.close()
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33 return port
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35
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36 def __unused_port_on_range(range):
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37 assert range[0] and range[1]
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38
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39 # Find all ports that are already occupied
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40 cmd_netstat = ["netstat", "tuln"]
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41 stdout = commands.execute(cmd_netstat)
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42
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43 occupied_ports = set()
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44 for line in stdout.split('\n'):
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45 if line.startswith('tcp') or line.startswith('tcp6'):
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46 col = line.split()
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47 local_address = col[3]
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48 local_port = local_address.split(':')[1]
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49 occupied_ports.add(int(local_port))
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50
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51 # Generate random free port number.
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52 while True:
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53 port = random.randrange(range[0], range[1])
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54 if port not in occupied_ports:
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55 break
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56 return port