__init__/fix: the app will shutdown if wsgi fail.

.github/workflows/test-only.yml

@@ -201,6 +201,30 @@ jobs:
           # @todo - scan the container log to see the right "graceful shutdown" text exists           
           docker rm sig-test
 
+      - name: Test changedetection.io wsgi fail case
+        run: |
+
+          echo "wsgi fail case: Address already in use"
+          docker run --name sig-test test-changedetectionio bash -c '
+          # just occupy external port 5000
+          python -m http.server 5000 --bind 0.0.0.0 &
+          # just a second.
+          sleep 1
+          # port conflicts and shutdown.
+          PORT=5000 python changedetection.py -d /datastore' || true &
+          sleep 7
+          docker ps -a
+          docker logs sig-test 2>&1 | grep 'Address already in use' || exit 1
+          docker logs sig-test 2>&1 | grep 'Shutting down datastore thread' || exit 1
+          test -z "`docker ps|grep sig-test`"
+          if [ $? -ne 0 ]
+          then
+            echo "Looks like container was running when it shouldnt be"
+            docker ps
+            exit 1
+          fi
+          docker rm sig-test
+
       - name: Dump container log
         if: always()
         run: |

changedetectionio/__init__.py

@@ -182,13 +182,23 @@ def hide_referrer(response):
 
     s_type = socket.AF_INET6 if ipv6_enabled else socket.AF_INET
 
-    if ssl_mode:
-        # @todo finalise SSL config, but this should get you in the right direction if you need it.
-        eventlet.wsgi.server(eventlet.wrap_ssl(eventlet.listen((host, port), s_type),
-                                               certfile='cert.pem',
-                                               keyfile='privkey.pem',
-                                               server_side=True), app)
-
-    else:
-        eventlet.wsgi.server(eventlet.listen((host, int(port)), s_type), app)
+    try:
+        if ssl_mode:
+            # @todo finalise SSL config, but this should get you in the right direction if you need it.
+            eventlet.wsgi.server(eventlet.wrap_ssl(eventlet.listen((host, port), s_type),
+                                                   certfile='cert.pem',
+                                                   keyfile='privkey.pem',
+                                                   server_side=True), app)
 
+        else:
+            eventlet.wsgi.server(eventlet.listen((host, int(port)), s_type), app)
+
+    except Exception as e:
+        import threading
+        import time
+        app.config.exit.set()
+        datastore.stop_thread = True
+        while len(threading.enumerate()) > 1:
+            time.sleep(1)
+        logger.critical(e)
+        sys.exit(2)