# Returned Values

- Normal

  Returned Value | Description
  --- | ---
  200 | The task is successfully delivered.
  202 | After the task is successfully delivered, the task to be delivered shall be postponed because the system is busy.
  204 | The task is successfully delivered.

- Abnormal

  Returned Value | Description
  --- | ---
  400 Bad Request | The server failed to process the request.
  401 Unauthorized | You need to enter the username and password to access the page requested.
  403 Forbidden | You are forbidden to access the page requested.
  404 Not Found | The server cannot find the page requested.
  405 Method Not Allowed | You are not allowed to use the method specified in the request.
  406 Not Acceptable | The response generated by the server cannot be accepted by the client.
  407 Proxy Authentication Required | You must use the proxy server for authentication. Then, the request can be processed.
  408 Request Timeout | The request timed out.
  409 Conflict | The request cannot be processed due to a conflict.
  500 Internal Server Error | Failed to complete the request because an internal service error occurs. A service exception occurred.
  501 Not Implemented | Failed to complete the request because an internal service error occurs. The server does not support the requested function.
  502 Bad Gateway | Failed to complete the request because an internal service error occurs. Failed to complete the request because the server receives an invalid request.
  503 Service Unavailable | Failed to complete the request because an internal service error occurs. The system is currently unavailable.
  504 Gateway Timeout | A gateway timeout error occurs.

Parent topic: Task Request Result