HTTP Requests and Header Settings

  • Cisco Unified IP Phones use HTTP to communicate to external applications
  • How HTTP client requests are handled (HTTP GET): Page 65
  • How HTTP server requests are handled (HTTP POST): Page 66
  • Any HTTP POST object is limited to 512 bytes in size. Larger objects (such as images) can only be delivered to the phone via HTTP GET. So, to push large objects to the phone, the server application must take an indirect approach. To do this, push an Execute object to the phone that contains an ExecuteItem pointing to the URL of the large object
  • The HTTP headers that are sent with any page from an HTTP server can include a Refresh setting. This setting comprises two parameters: a time in seconds and a URL. These two parameters direct the recipient to wait the time given in the seconds parameter and then get the data to which the URL points

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