runserver.py

from glassfrog import app
import socket
import argparse
import webbrowser

parser = argparse.ArgumentParser(description='Launch the Glassfrog Hipchat bot')
parser.add_argument('--debug', action="store_true", default=False, help="Run in debug mode")
parser.add_argument('--host', default='localhost', help="Set host to listen on.")
parser.add_argument('--port', type=int, default=45277,
                    help="Set port to try to listen to. Tries 45277 by default. If busy "
                         "the OS is asked what port to use.")
args = parser.parse_args()


def get_open_port():
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.bind(('', 0))
    s.listen(1)
    port = s.getsockname()[1]
    s.close()
    return port


def try_port(port_number=None):
    if not port_number:
        port = get_open_port()
    else:
        port = port_number

    app.run(debug=args.debug, port=port, host=args.host)


try:
    try_port(args.port)
except OSError:
    print("Port {} taken, asking OS for an available port.".format(args.port))
    try_port()