Exit script if importing fails

import_md/hedgedoc_import.py

@@ -17,7 +17,11 @@ def import_single_document(instance_url, hedgedoc_free_url, content, session_id)
 
     req = urllib.request.Request(request_url, data=str.encode(content), method='POST', headers=headers)
     # unfortunately, no error is thrown if a document is not created when session cookie is invalid
+    # HTTP 409 is ignored for the sake of simplicity. Handled in import_into_hedgedoc(..)
+    # Not optimal, but nobody ain't got time for that
     with urllib.request.urlopen(req) as response:
+        if response.url == instance_url + "/":
+            raise SystemExit("Could not import document. Please check your HedgeDoc session cookie. Aborting...")
         return response.url
 
 
@@ -75,8 +79,9 @@ def process_archive_export(archive_file, instance_url, lookup_map, session_id, u
                 try_generate_free_url_document(document_content, document_title, instance_url, lookup_map, session_id,
                                                urls_to_visit)
             else:
-                print(f"According to your history, you did not visit \"{document_title}.md\" in the CodiMD "
-                      "instance recently. Migrating the document and generating a new, random URL/path for it")
+                print(
+                    f"According to your history (or lack thereof) , you did not visit \"{document_title}.md\" in the "
+                    f"CodiMD instance recently. Migrating the document and generating a new, random URL/path for it")
                 # empty string implies HedgeDoc should create a new ID
                 generated_url = import_single_document(instance_url, "", document_content, session_id)
                 print(f"New URL after document migration with new, random URL/subpath: "