file removal background job

file_removal_scheduler.py

@@ -0,0 +1,26 @@
+import glob
+import time
+import sys
+import os
+import random
+
+
+def run_file_removal_job(upload_folder_path):
+    if random.randint(0, 10) == 0:
+        for file in glob.glob(upload_folder_path + '/*'):
+            delete_file_when_too_old(file)
+
+
+def delete_file_when_too_old(filepath):
+    file_mod_time = os.stat(filepath).st_mtime
+
+    # time in second since last modification of file
+    last_time = time.time() - file_mod_time
+
+    # if file is older than our configured max timeframe, delete it
+    if last_time > int(os.environ.get('MAT2_MAX_FILE_AGE_FOR_REMOVAL', 15 * 60)):
+        try:
+            os.remove(filepath)
+        except OSError:
+            print('Automatic File Removal failed on file: ' + str(filepath))
+            sys.exit(1)