Cisco Systems OL-20949-01 manual Http Refresh Setting, Refresh Display Sample

Page 71

Chapter 6 HTTP Requests and Header Settings

HTTP Header Settings

HTTP Refresh Setting

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.

The Cisco Unified IP Phone HTTP client properly supports this setting, which gives a great deal of power to service developers. It means that a new page can replace any XML object that displays after a fixed time.

Figure 6-1shows an example of how to use the refresh setting. This sample page shows the user the current value of Cisco stock.

1.A splash screen that displays the Yahoo logo.

2.After a very short time, it displays the numeric Cisco stock parameters.

3.Finally, it shows a graph of Cisco intraday stock performance. The display then repeatedly cycles between the final two views.

Figure 6-1 Refresh Display Sample

Refreshing the display can occur without user intervention, because the display automatically cycles if a timer parameter is specified. On any given screen, however, the user can force an immediate reload by pressing the Update softkey. Also, if a timer parameter of 0 was sent in the header, the page never automatically reloads. In this case, the display will move to the next page only when the Update softkey is pressed. If no refresh URL is specified, the current page gets reloaded.

Cisco Unified IP Phone Services Application Development Notes

	OL-20949-01	6-3

Image 71

Contents Text Part Number OL-20949-01 Americas HeadquartersCopyright 2004-2009 Cisco Systems, Inc. All rights reserved Iii N T E N T SDisplay Init Benefits Audience PrefaceOverview Revision HistoryViii OrganizationChapter Description Cisco Unified Communications Manager Business Edition Cisco Unified Communications Manager AdministrationRelated Documentation Cisco Unified IP Phone 7900 SeriesConvention Indication Cisco Product Security OverviewDocument Conventions Page Xii 1shows a sample text menu OverviewGraphic Menu on a Cisco Unified IP Phone Sample Page OL-20949-01 New Information for Cisco Unified Communications Manager New and Changed InformationOL-20949-01 Understanding Object Behavior CiscoIPPhone XML Objects1shows the supported XML objects for this release CiscoIPPhoneMenu XML Object DefinitionsDefinition CiscoIPPhoneTextSample User Input Display CiscoIPPhoneInputInputFlag Description CiscoIPPhoneDirectoryCustom Directories CiscoIPPhoneImagePacked Pixel Translation Example Model Resolution1CiscoIPPhoneImageFile ExampleCisco Unified IP Phone 7970G Image File Display MonochromeCiscoIPPhoneGraphicFileMenu CiscoIPPhoneGraphicMenu5shows the display of the CiscoIPPhoneGraphicFileMenu CiscoIPPhoneIconMenu6shows an IconMenu on a Cisco Unified IP Phone CiscoIPPhoneStatus CiscoIPPhoneIconFileMenuCiscoIPPhoneStatus Dynamic Sizing of the Application Status Window7962G, 7965G 7970G/7971G-GE, 7975G, IP Communicator Phone Models Area Width Area Height 7940G, 7960G7962G, 7965G Phone Models WxH No Timer WxH 7940G, 7960GCiscoIPPhoneStatusFile Text Area SizeBehavior Description CiscoIPPhoneExecuteCiscoIPPhoneResponse CiscoIPPhoneErrorCustom Softkeys SoftKeyItem NameDisplayed sofkey label/Name XML ConsiderationsCharacter Name Escape Sequence Mandatory Escape SequencesXML Encoding Attributes Application Event HandlersSupported Unsupported Attribute Description Event Handler Schema RTP Streaming API Component APIsApplication Management API Interaction Rules with Legacy RTP URI Streams RTP Streaming SchemaXscomplexType Xsall Error Schema Stop Media Errors and ResponsesExamples Start MediaApplicable Condition Methods Http Result Code Type Data 7905G 7911G 7921G 7940G 7971G-GE 6941 Internal URI FeaturesSupported URIs by Phone Model 7942G, 7962G 7906G 7945G, 7965G 7970G 6921URI Format Device Control URIsKey KeyDirectories Description and Alternatives Phone Unsupported ModelsURI DisplaySoftKey XML Displayable Object URIsQueryStringParam Select Exit Update Submit Search Cancel Next DialInternal URI Features XML Displayable Object URIs Interaction with Call Streaming Multimedia URIsRTP Streaming URI Formats RTPRxRTPTx Interaction with Incoming Calls PlayVibrate Dial Telephony URIsSendDigits EditDialCondition Status Data Error and ResponseNotify Application Management URIsInit Called from SoftKey, with credentials, with data Called from SoftKey, no credentials, no data ApplicationAppactionpriorityidleTimerapplicationId Error and Response Http Server Requests Http Post Http Requests and Header SettingsHttp Client Requests Http GET See the Http Refresh Setting section on page 6-3section Http Header SettingsRefresh Display Sample Http Refresh SettingMime Type and Other Http Headers Content Expiration Header SettingSet-Cookie Header Setting Accept-Language Http Encoding Header SettingCiscoIPPhoneDisplay Identifying the Capabilities of IP Phone ClientsCiscoIPPhoneModelName CiscoIPPhoneSDKVersion Accept HeaderHtml URL XML URL Accessing IP Phone InformationOL-20949-01 XML Parsing Errors Troubleshooting Cisco Unified IP Phone Service ApplicationsTroubleshooting Tips Error Messages SDK Components Cisco IP Phone Services Software Development Kit SDKOL-20949-01 \CiscoIpServices\Tools Sample Services RequirementsOL-20949-01 Accessing Phone Service Administration IP Phone Service Administration SubscriptionField Description Adding a Phone ServiceField Description Service Parameter Information Defining IP Phone Service ParametersUser Service Subscription 10-1 DeviceListX ReportPerformance and Scalability BenefitsRestrictions Integration Considerations and InteroperabilityPrerequisites Related Features and TechnologiesSecurity Supported Platforms10-4 Troubleshooting DeviceListX ReportsError Codes Field Name Description10-5 Determining Problems With the InterfaceProcedure 10-6 Object Definition CiscoIPPhone XML Object Quick ReferenceAppendix a CiscoIPPhone XML Object Quick Reference IndexA unique index from 0 to 9/Index OL-20949-01 Updated XML Parser and Schema Enforcement Cisco Unified IP Phone Services XML Schema FileCiscoIPPhone.xsd Xsdelement name=Name minOccurs=0 xsdsimpleType Xsdrestriction XsdsimpleType XsdsimpleType xsdrestriction base=xsdstring XsdcomplexType name=CiscoIPPhoneSoftKeyType xsdsequence Xsdelement name=Title minOccurs=0 xsdsimpleType Xsdrestriction XsdsimpleType Xsdattribute XsdcomplexType Xsdelement name=CiscoIPPhoneDirectory xsdcomplexType Xsdelement name=CiscoIPPhoneImageFile xsdcomplexType Xsdelement name=CiscoIPPhoneIconMenu xsdcomplexType Xsdelement name=CiscoIPPhoneGraphicFileMenu xsdcomplexType Xsdsequence Xsdelement name=Text minOccurs=0 xsdsimpleType Xsdsequence XsdcomplexType Xsdelement IN-1 NumericsIN-2 Html URLIN-3 IN-4 XML URL