How to use is_port_available method in avocado

Best Python code snippet using avocado_python

experiment_server_controller.py

Source:experiment_server_controller.py

...11#!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!12# Supporting functions13#   general purpose helper functions used by the dashboard server and controller14#!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!15def is_port_available(ip, port):16    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)17    s.settimeout(1)18    try:19        s.connect((ip, int(port)))20        s.shutdown(2)21        return False22    except socket.timeout:23        print "*** Failed to test port availability. Check that host\nis set properly in config.txt"24        return True25    except socket.error,e:26        return True27def wait_until_online(function, ip, port):28    """29    Uses Wait_For_State to wait for the server to come online, then runs the given function.30    """31    awaiting_service = Wait_For_State(lambda: not is_port_available(ip, port), function)32    awaiting_service.start()33    return awaiting_service34def launch_browser(host, port, route):35    launchurl = "http://{host}:{port}/{route}".format(host=host, port=port, route=route)36    webbrowser.open(launchurl, new=1, autoraise=True)37def launch_browser_when_online(ip, port, route):38    return wait_until_online(lambda: launch_browser(ip, port, route), ip, port)39#----------------------------------------------------------------40# handles waiting for processes which we don't control (e.g.,41# browser requests)42#----------------------------------------------------------------43class Wait_For_State(Thread):44    """45    Waits for a state-checking function to return True, then runs a given46    function. For example, this is used to launch the browser once the server is47    started up.48    Example:49    t = Wait_For_State(lambda: server.check_port_state(), lambda: print "Server has started!")50    t.start()51    t.cancel() # Cancels thread52    """53    def __init__(self, state_function, function, pollinterval=1):54        Thread.__init__(self)55        self.function = function56        self.state_function = state_function57        self.pollinterval = pollinterval58        self.finished = Event()59        self.final = lambda: ()60    def cancel(self):61        self.finished.set()62    def run(self):63        while not self.finished.is_set():64            if self.state_function():65                self.function()66                self.finished.set()67            else:68                self.finished.wait(self.pollinterval)69#----------------------------------------------70# vanilla exception handler71#----------------------------------------------72class ExperimentServerControllerException(Exception):73    def __init__(self, value):74        self.value = value75    def __str__(self):76        return repr(self.value)77#----------------------------------------------78# simple wrapper class to control the79# starting/stopping of experiment server80#----------------------------------------------81class ExperimentServerController:82    def __init__(self, config):83        self.config = config84        self.server_running = False85    def get_ppid(self):86        if not self.is_port_available():87            url = "http://{hostname}:{port}/ppid".format(hostname=self.config.get("Server Parameters", "host"), port=self.config.getint("Server Parameters", "port"))88            ppid_request = urllib2.Request(url)89            ppid =  urllib2.urlopen(ppid_request).read()90            return ppid91        else:92            raise ExperimentServerControllerException("Cannot shut down experiment server, server not online")93    def restart(self):94        self.shutdown()95        self.startup()96    def shutdown(self, ppid=None):97        if not ppid:98            ppid = self.get_ppid()99        print("Shutting down experiment server at pid %s..." % ppid)100        try:101            os.kill(int(ppid), signal.SIGKILL)102            self.server_running = False103        except ExperimentServerControllerException:104            print ExperimentServerControllerException105        else:106            self.server_running = False107    def kill_child_processes(self, parent_pid, sig=signal.SIGTERM):108        if os.uname()[0] is 'Linux':109            ps_command = subprocess.Popen('pstree -p %d | perl -ne \'print "$1 "\110                                          while /\((\d+)\)/g\'' % parent.pid,111                                          shell=True, stdout=subprocess.PIPE)112            ps_output = ps_command.stdout.read()113            retcode = ps_command.wait()114            assert retcode == 0, "ps command returned %d" % retcode115            for pid_str in ps_output.split("\n")[:-1]:116                os.kill(int(pid_str), sig)117        if os.uname()[0] is 'Darwin':118            child_pid = parent.get_children(recursive=True)119            for pid in child_pid:120                pid.send_signal(signal.SIGTERM)121    def is_server_running(self):122        PROCNAME = "psiturk_experiment_server"123        cmd = "ps -o pid,command | grep '"+ PROCNAME + "' | grep -v grep | awk '{print $1}'"124        psiturk_exp_processes = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE)125        output = psiturk_exp_processes.stdout.readlines()126        parent = psutil.Process(psiturk_exp_processes.pid)127        self.kill_child_processes(parent.pid)128        129        if output:130            is_psiturk_using_port = True131        else:132            is_psiturk_using_port = False133        is_port_open = self.is_port_available()134        #print self.server_running, " ", portopen135        if is_port_open and is_psiturk_using_port:  # This should never occur136            return 'maybe'137        elif not is_port_open and not is_psiturk_using_port:138            return 'blocked'139        elif is_port_open and not is_psiturk_using_port:140            return 'no'141        elif not is_port_open and is_psiturk_using_port:142            return 'yes'143    def is_port_available(self):144        return is_port_available(self.config.get("Server Parameters", "host"), self.config.getint("Server Parameters", "port"))145    def startup(self):146        server_command = "{python_exec} '{server_script}'".format(147            python_exec = sys.executable,148            server_script = os.path.join(os.path.dirname(__file__), "experiment_server.py")149        )150        server_status = self.is_server_running()151        if server_status == 'no':152            #print "Running experiment server with command:", server_command153            subprocess.Popen(server_command, shell=True, close_fds=True)154            print "Experiment server launching..."155            self.server_running = True156        elif server_status == 'maybe':157            print "Error: Not sure what to tell you..."158        elif server_status == 'yes':...

bash_utils.py

Source:bash_utils.py

...33    for f in files:34        copy_file(f, destination)35def find_free_port(base_port=7000):36    port = base_port37    available = is_port_available(port)38    while not available:39        port += 140        available = is_port_available(port)41    return port42def is_port_available(port=7000):43    import socket, errno44    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)45    try:46        s.bind(("0.0.0.0", port))47    except socket.error as e:48        if e.errno == errno.EADDRINUSE:49            return False50        else:51            traceback.print_exc()52            raise Exception(e)53    s.close()54    return True55def get_ip_address():56    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)...

ports.py

Source:ports.py

1# -*- coding: utf-8 -*-2#3# Copyright (C) 2016-2020  SysMedOs_team @ AG Bioanalytik, University of Leipzig:4#5# LipidLynxX is using GPL V3 License6#7# Please cite our publication in an appropriate form.8#   LipidLynxX preprint on bioRxiv.org9#   Zhixu Ni, Maria Fedorova.10#   "LipidLynxX: a data transfer hub to support integration of large scale lipidomics datasets"11#   DOI: 10.1101/2020.04.09.03389412#13# For more info please contact:14#     Developer Zhixu Ni zhixu.ni@uni-leipzig.de15import socket16def try_port(port: int) -> bool:17    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)18    result = False19    try:20        sock.bind(("0.0.0.0", port))21        result = True22    except Exception as e:23        print(f"{e}")24        print(f"Port: [{port}] already in use, try to find next available port.")25    sock.close()26    return result27def check_port(port: int, task_name: str = None) -> int:28    is_port_available = False29    tmp_port = port30    if task_name:31        task_info = f" for {task_name}"32    else:33        task_info = ""34    while is_port_available is False:35        is_port_available = try_port(tmp_port)36        if is_port_available:37            if tmp_port == port:38                print(f"Port: [{port}] is available{task_info}.")39            else:40                print(41                    f"Port: [{port}] already in use, switch to next available port: [{tmp_port}]{task_info}."42                )43        else:44            tmp_port += 345    return tmp_port46if __name__ == "__main__":47    usr_port = 139948    available_port = check_port(usr_port, "LipidLynxX")...

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