Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/planemo/network_util.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 import socket |
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2 from http.client import BadStatusLine |
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3 from time import time as now |
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4 |
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5 from six.moves.urllib.error import URLError |
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6 from six.moves.urllib.request import urlopen |
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7 |
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8 |
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9 def get_free_port(): |
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10 sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) |
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11 sock.bind(('localhost', 0)) |
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12 port = sock.getsockname()[1] |
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13 sock.close() |
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14 return port |
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15 |
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16 |
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17 def wait_http_service(url, timeout=None): |
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18 if timeout: |
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19 end = now() + timeout |
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20 |
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21 while True: |
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22 try: |
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23 if timeout: |
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24 next_timeout = end - now() |
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25 if next_timeout < 0: |
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26 return False |
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27 |
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28 kwds = {} if timeout is None else dict(timeout=next_timeout) |
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29 with urlopen(url, **kwds) as r: |
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30 if r.getcode() != 200: |
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31 continue |
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32 return True |
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33 except socket.error: |
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34 pass |
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35 except BadStatusLine: |
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36 pass |
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37 except URLError: |
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38 pass |
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39 |
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40 |
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41 # code.activestate.com/recipes/576655-wait-for-network-service-to-appear |
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42 def wait_net_service(server, port, timeout=None): |
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43 """ Wait for network service to appear. |
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44 |
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45 :param int timeout: in seconds, if None or 0 wait forever |
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46 :return: A ``bool`` - if ``timeout`` is ``None`` may return only ``True`` or |
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47 throw an unhandled network exception. |
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48 """ |
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49 if port is None: |
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50 raise TypeError("wait_net_service passed NoneType port value.") |
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51 |
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52 port = int(port) |
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53 |
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54 if timeout: |
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55 end = now() + timeout |
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56 |
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57 while True: |
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58 s = socket.socket() |
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59 # Following line prevents this method from interfering with process |
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60 # it is waiting for on localhost. |
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61 s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) |
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62 try: |
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63 if timeout: |
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64 next_timeout = end - now() |
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65 if next_timeout < 0: |
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66 return False |
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67 else: |
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68 s.settimeout(next_timeout) |
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69 |
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70 s.connect((server, port)) |
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71 |
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72 except socket.timeout: |
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73 # this exception occurs only if timeout is set |
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74 if timeout: |
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75 return False |
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76 |
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77 except socket.error: |
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78 # if getattr(e, "errno") == 61: |
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79 # refused_connections += 1 |
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80 s.close() |
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81 else: |
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82 s.close() |
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83 return True |