Aastra Telecom 57I C53I manual Http Refresh Header, Refresh Setting Format

Creating an XML Application

How to Create an XML Application

HTTP Refresh Header

You can use an HTTP refresh header with the XML screen objects on the IP phones. This feature provides the following:

•All current XML screen objects have the ability to be refreshed by adding a Refresh and URL setting to the HTTP headers. (see Refresh setting format below)

•The Refresh setting is set by the XML application and it is up to the application to decide which objects it wants to refresh.

Note: This HTTP refresh header feature only applies to objects that display to the screen.

The Refresh setting must be included in the HTTP header. The XML application decides which objects it wants to use with this setting. The phone recognizes this setting when parsing the HTTP header. If the setting is present, then it passes along the refresh timeout and the URL to the ParserData object, which all XML screen objects inherit from. The ParserData class also has a timer, which must be set to expire at the next refresh time. When the timer expires (time to refresh the screen), the phone requests the URL again and displays the refreshed screen.

Refresh Setting Format

The following is the Refresh setting format for the HTTP header:

Refresh: <timeout>; URL=<page to load>

The following example is a Refresh setting for use in an HTTP header:

Refresh: 3; URL=http://10.50.10.140/cgi-bin/update.xml

Note: You must use the Refresh and URL parameters in order for this feature to work in the HTTP header.

Appendix G

41-001160-00, Rev 01 Release 2.0 G-47