Internet Printing Protocol (IPP): The 'ippget' Delivery Method for Event Notifications

摘要

This document describes an extension to the Internet PrintingProtocol/1.0 (IPP) [RFC2566, RFC2565] and IPP/1.1 [RFC2911, RFC2910].This document specifies the 'ippget' Delivery Method for use with the'IPP Event Notifications and Subscriptions' specification [ipp-ntfy].When IPP Notification [ipp-ntfy] is supported, the Delivery Methoddefined in this document is one of the RECOMMENDED Delivery Methodsfor Printers to support.The 'ippget' Delivery Method is a Pull Delivery Method. When an Eventoccurs, the Printer saves the Event Notification for a period of timecalled the Event Life. The Notification Recipient fetches (pulls)Event Notifications using the Get-Notifications operation. If theNotification Recipient has selected the Event Wait Mode option towait for additional Event Notifications, the Printer continues to return Event Notifications to the Notification Recipient as Get-Notification responses as Events occur using the connectionoriginated by the Notification Recipient.Either the Notification Recipient or the Printer can terminate EventWait Mode without closing the connection.