Source code for planemo.network_util

import socket
from http.client import BadStatusLine
from time import time as now
from urllib.error import URLError
from urllib.request import urlopen


[docs]def get_free_port(): sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.bind(("localhost", 0)) port = sock.getsockname()[1] sock.close() return port
[docs]def wait_http_service(url, timeout=None): if timeout: end = now() + timeout while True: try: if timeout: next_timeout = end - now() if next_timeout < 0: return False kwds = {} if timeout is None else dict(timeout=next_timeout) with urlopen(url, **kwds) as r: if r.getcode() != 200: continue return True except OSError: pass except BadStatusLine: pass except URLError: pass
# code.activestate.com/recipes/576655-wait-for-network-service-to-appear
[docs]def wait_net_service(server, port, timeout=None): """Wait for network service to appear. :param int timeout: in seconds, if None or 0 wait forever :return: A ``bool`` - if ``timeout`` is ``None`` may return only ``True`` or throw an unhandled network exception. """ if port is None: raise TypeError("wait_net_service passed NoneType port value.") port = int(port) if timeout: end = now() + timeout while True: s = socket.socket() # Following line prevents this method from interfering with process # it is waiting for on localhost. s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) try: if timeout: next_timeout = end - now() if next_timeout < 0: return False else: s.settimeout(next_timeout) s.connect((server, port)) except socket.timeout: # this exception occurs only if timeout is set if timeout: return False except OSError: # if getattr(e, "errno") == 61: # refused_connections += 1 s.close() else: s.close() return True