README.md

@@ -57,7 +57,8 @@ This also runs all necessary migrations.
 # Activate venv
 
 **On every new session**, before running commands with
-manage.py or developing, you have to activate the venv:
+manage.py, running special scripts, or developing,
+you have to activate the virtual environment:
 ```
 source ./venv/bin/activate
 ```

manage.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!./venv/bin/python3
 """Django's command-line utility for administrative tasks."""
 import os
 import sys

scripts/_bootstrap.py

@@ -131,13 +131,15 @@ if __name__ == "__main__":
                 "Caddy Webserver",
                 ["caddy", "run", "--config", str(caddyfile)],
                 None,
-                environment=environment_caddy
-            ),
+                environment=environment_caddy),
             MonitoredSubprocess(
                 "Django Development Server",
                 ["./venv/bin/python3", "./manage.py", "runserver", str(config["app"]["application_port"])],
-                None
-            ),
+                None),
+            MonitoredSubprocess(
+                "Session Autocleaner",
+                ["./scripts/_session-autocleaner.py", str(config["app"]["session_clear_interval"])],
+                None)
         ]
         start_and_monitor(procs)
     else:
@@ -151,8 +153,7 @@ if __name__ == "__main__":
                 "Caddy Webserver",
                 ["caddy", "run", "--config", str(caddyfile)],
                 logfile_caddy,
-                environment=environment_caddy
-            ),
+                environment=environment_caddy),
             MonitoredSubprocess(
                 "Drinks-Manager",
                 [
@@ -166,7 +167,10 @@ if __name__ == "__main__":
                     "project.asgi:application",
                 ],
                 logfile_app,
-                environment=environment_app
-            ),
+                environment=environment_app),
+            MonitoredSubprocess(
+                "Session Autocleaner",
+                ["./scripts/_session-autocleaner.py", str(config["app"]["session_clear_interval"])],
+                logfile_app)
         ]
         start_and_monitor(procs)

scripts/_session-autocleaner.py

@@ -0,0 +1,55 @@
+#!./venv/bin/python3
+
+# This script clears expired sessions in a regular interval
+
+import os
+
+from argparse import ArgumentParser
+from atexit import register as register_exithandler
+from pathlib import Path
+from subprocess import Popen
+from time import sleep
+from datetime import datetime
+
+
+current_proc = None
+
+
+def exithandler():
+    if current_proc is not None:
+        seconds_waited = 0
+        while current_proc.poll() is None:
+            # wait for 10 seconds to quit session cleaner
+            if seconds_waited >= 10:
+                current_proc.terminate()
+                break
+            # is still running
+            sleep(1)
+            seconds_waited += 1
+    print("Stopped session-autocleaner.")
+
+
+if __name__ == "__main__":
+    try:
+        argp = ArgumentParser()
+        argp.add_argument("interval", help="The interval in minutes", type=int)
+        args = argp.parse_args()
+        os.chdir(str(Path(__file__).parent.parent))
+        print(f"Started session-autocleaner with an interval of {args.interval} minute(s)")
+        interval = args.interval * 60
+        # register exithandler that cleans up stuff
+        register_exithandler(exithandler)
+        # main loop
+        while True:
+            if current_proc is not None:
+                # wait for last iteration
+                while current_proc.poll() is None:
+                    # is still running
+                    print("Last cleanup is still running, waiting before clearing sessions...")
+                    sleep(1)
+            print(f"Clearing expired sessions at {datetime.now()}...")
+            current_proc = Popen(
+                ["./manage.py", "clearsessions"])
+            sleep(interval)
+    except KeyboardInterrupt:
+        exit()

start.sh

@@ -8,4 +8,4 @@ export PYTHONPATH="$basedir"
 export DJANGO_SETTINGS_MODULE="project.settings"
 export APP_VERSION="revamp-pre"
 
-exec ./scripts/bootstrap.py "$@"
+exec ./scripts/_bootstrap.py "$@"