Add attachment validator when uploading attachment to tickets

helpdesk/validators.py

@@ -0,0 +1,15 @@
+# validators.py
+#
+# validators for file uploads, etc.
+
+
+
+def validate_file_extension(value):
+    import os
+    from django.core.exceptions import ValidationError
+    ext = os.path.splitext(value.name)[1]  # [0] returns path+filename
+    valid_extensions = ['.txt', '.pdf', '.doc', '.docx', '.odt', '.jpg', '.png']
+    # TODO: we might improve this with more thorough checks of file types
+    # rather than just the extensions.
+    if not ext.lower() in valid_extensions:
+        raise ValidationError('Unsupported file extension.')