They are purged nightly to avoid garbage accumulation. These URL's should not be bookmarked. These are alphabetic and managed by the system administrator. They represent the 'official' entrypoints and thus may be bookmarked. The same reply is triggered by any execution error.
Basic mechanism is used.
It is up to the individual HTML-generating method to use the authentification information to decide whether the request is legitimate or how to customize the response. Forms Forms information is extracted to a dictionary with the field names as keys and the field data as values. The log contains information to rerun all requests in case of a crash. During the night the image is saved and a new log created. Undo Undo is implemented by creating undo objects holding receiver, message, and parameters.