Create attractive VASL scenarios, with loads of useful information embedded to assist with game play. https://vasl-templates.org
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vasl-templates/vasl_templates/webapp/run_server.py

77 lines
2.9 KiB

#!/usr/bin/env python3
""" Run the webapp server. """
import os
import threading
import urllib.request
import time
import glob
import click
# ---------------------------------------------------------------------
@click.command()
@click.option( "--addr","-a","bind_addr", help="Webapp server address (host:port)." )
@click.option( "--force-init-delay", default=0, help="Force the webapp to initialize (#seconds delay)." )
@click.option( "--debug","flask_debug", is_flag=True, default=False, help="Run Flask in debug mode." )
def main( bind_addr, force_init_delay, flask_debug ):
"""Run the vasl-templates webapp server."""
# initialize
from vasl_templates.webapp import app
port = None
if bind_addr:
words = bind_addr.split( ":" )
host = words[0]
if len(words) > 1:
port = words[1]
else:
host = app.config.get( "FLASK_HOST", "localhost" )
if not port:
port = app.config.get( "FLASK_PORT_NO" )
if not flask_debug:
flask_debug = app.config.get( "FLASK_DEBUG", False )
# validate the configuration
if not host:
raise RuntimeError( "The server host was not set." )
if not port:
raise RuntimeError( "The server port was not set." )
# monitor extra files for changes
extra_files = []
fspecs = [ "static/", "templates/", "config/" ]
fspecs.extend( [ "tests/control_tests_servicer.py", "tests/proto/generated/" ] )
for fspec in fspecs:
fspec = os.path.abspath( os.path.join( os.path.dirname(__file__), fspec ) )
if os.path.isdir( fspec ):
files = [ os.path.join(fspec,f) for f in os.listdir(fspec) ]
files = [ f for f in files if os.path.isfile(f) and os.path.splitext(f)[1] not in [".swp"] ]
else:
files = glob.glob( fspec )
extra_files.extend( files )
# check if we should force webapp initialization
if force_init_delay > 0:
def _start_server():
"""Force the server to do "first request" initialization."""
# NOTE: This is not needed when running the desktop app (since it will request the home page),
# but if we're running just the server (i.e. from the console, or a Docker container), then
# it's useful to send a request (any request), since this will trigger "first request" initialization
# (in particular, starting the download thread).
time.sleep( force_init_delay )
url = "http://{}:{}/ping".format( host, port )
with urllib.request.urlopen( url ) as resp:
_ = resp.read()
threading.Thread( target=_start_server, daemon=True ).start()
# run the server
app.run( host=host, port=port, debug=flask_debug,
extra_files = extra_files
)
# ---------------------------------------------------------------------
if __name__ == "__main__":
main() #pylint: disable=no-value-for-parameter