main.py
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#!/usr/bin/env python3
# python standard library
import argparse
import logging
import os
from os import environ, path
import ssl
import sys
# from typing import Any, Dict
# this project
from .app import App
from .serve import run_webserver
from .tools import load_yaml
from . import APP_NAME, APP_VERSION
# ----------------------------------------------------------------------------
def parse_cmdline_arguments():
'''
Get command line arguments
'''
parser = argparse.ArgumentParser(
description='Server for online tests. Enrolled students and tests '
'have to be previously configured. Please read the documentation '
'included with this software before running the server.')
parser.add_argument('testfile',
type=str, nargs='?',
help='tests in YAML format')
parser.add_argument('--allow-all',
action='store_true',
help='Allow all students to login immediately')
parser.add_argument('--debug',
action='store_true',
help='Enable debug messages')
parser.add_argument('--show-ref',
action='store_true',
help='Show question references')
parser.add_argument('--review',
action='store_true',
help='Review mode: doesn\'t generate test')
parser.add_argument('--port',
type=int, default=8443,
help='port for the HTTPS server (default: 8443)')
parser.add_argument('-v', '--version', action='store_true',
help='Show version information and exit')
return parser.parse_args()
# ----------------------------------------------------------------------------
def get_logger_config(debug=False):
'''
Load logger configuration from ~/.config directory if exists,
otherwise set default paramenters.
'''
if debug:
filename = 'logger-debug.yaml'
level = 'DEBUG'
else:
filename = 'logger.yaml'
level = 'INFO'
config_dir = environ.get('XDG_CONFIG_HOME', '~/.config/')
config_file = path.join(path.expanduser(config_dir), APP_NAME, filename)
default_config = {
'version': 1,
'formatters': {
'standard': {
'format': '%(asctime)s %(levelname)-8s %(message)s',
'datefmt': '%H:%M',
},
},
'handlers': {
'default': {
'level': level,
'class': 'logging.StreamHandler',
'formatter': 'standard',
'stream': 'ext://sys.stdout',
},
},
'loggers': {
'': { # configuration for serve.py
'handlers': ['default'],
'level': level,
},
},
}
default_config['loggers'].update({
APP_NAME+'.'+module: {
'handlers': ['default'],
'level': level,
'propagate': False,
} for module in ['app', 'models', 'factory', 'questions',
'test', 'tools']})
return load_yaml(config_file, default=default_config)
# ----------------------------------------------------------------------------
def main():
'''
Tornado web server
'''
args = parse_cmdline_arguments()
if args.version:
print(f'{APP_NAME} {APP_VERSION}\nPython {sys.version}')
sys.exit(0)
# --- Setup logging ------------------------------------------------------
logging.config.dictConfig(get_logger_config(args.debug))
logging.info('====================== Start Logging ======================')
# --- start application --------------------------------------------------
config = {
'testfile': args.testfile,
'debug': args.debug,
'allow_all': args.allow_all,
'show_ref': args.show_ref,
'review': args.review,
}
# testapp = App(config)
try:
testapp = App(config)
except Exception:
logging.critical('Failed to start application.')
sys.exit(-1)
# --- get SSL certificates -----------------------------------------------
if 'XDG_DATA_HOME' in os.environ:
certs_dir = path.join(os.environ['XDG_DATA_HOME'], 'certs')
else:
certs_dir = path.expanduser('~/.local/share/certs')
ssl_opt = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
try:
ssl_opt.load_cert_chain(path.join(certs_dir, 'cert.pem'),
path.join(certs_dir, 'privkey.pem'))
except FileNotFoundError:
logging.critical('SSL certificates missing in %s', certs_dir)
sys.exit(-1)
# --- run webserver ----------------------------------------------------
run_webserver(app=testapp, ssl_opt=ssl_opt, port=args.port,
debug=args.debug)
# ----------------------------------------------------------------------------
if __name__ == "__main__":
main()