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Extend a presence subscription

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Extend a presence subscription beyond its normal expiration time.

Applies to: Skype for Business 2015

A presence subscription has an expiration time set by the duration parameter when the subscription is created. When the subscription is about to expire, a presenceSubscription updated event is sent on the event channel. Upon receiving such an event, the application can choose to extend, ignore, or delete the subscription. When ignored, the subscription will expire when its lifetime reaches the preset duration value. To delete a presence subscription, see Delete a presence subscription.

To extend the subscription, follow these steps: The steps here assume that you have already created an application and have received a response that contains the href for an application resource. For more information, see Create an application.

  1. Parse the presenceSubscription updated event.

Parse the self link of the presenceSubscription updated event (as shown below) to obtain the URL of the resource representing the presence subscription.

{
"_links":{
"self":{"href":"/ucwa/v1/applications/101/events?ack=10"},
"next":{"href":"/ucwa/v1/applications/101/events?ack=11"}
},
"sender": [
{
"rel":"people",
"href":"/ucwa/v1/applications/101/people",
"events": [
{
"link":{
"rel":"presenceSubscription",
"href":"/ucwa/v1/applications/101/people/presenceSubscriptions/97b6bd66"
},
"_embedded":{
"presenceSubscription":{
"id":"97b6bd66",
"_links":{
"self":{"href":"/ucwa/v1/applications/101/people/presenceSubscriptions/97b6bd66"},
"memberships":{"href":"/ucwa/v1/applications/101/people/presenceSubscriptionMemberships?presenceSubscriptionId=97b6bd66"},
"addToPresenceSubscription":{"href":"/ucwa/v1/applications/101/people/presenceSubscriptionMemberships?presenceSubscriptionId=97b6bd66"}
},
"rel":"presenceSubscription"
}
},
"type":"updated"
}
]
}]
}
  1. Send a POST request on the presenceSubscription resource with a new duration value.

Specify the new duration value in the query parameter. An example of the HTTP request is shown as follows:

POST https://lyncweb.contoso.com/ucwa/oauth/v1/applications/101/people/presenceSubscriptions/97b6bd66?duration=11 HTTP/1.1 
Authorization: Bearer cwt=AAEBHAEFAAAAAAAFFQAAAIxVppb
Accept: application/json
X-Ms-Origin: http://localhost
X-Requested-With: XMLHttpRequest
Referer: https://lyncweb.contoso.com/Autodiscover/XFrame/XFrame.html
Accept-Language: en-us
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/5.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.3; MS-RTC LM 8; Zune 4.7; BRI/2; .NET4.0C; .NET4.0E)
Host: lyncweb.contoso.com
Content-Length: 0
DNT: 1
Connection: Keep-Alive
Cache-Control: no-cache
  1. Process the response from the POST request above.

If the request is successful, a 200 OK response will be returned. An example is shown as follows:

HTTP/1.1 200 OK
Connection: Keep-Alive
Content-Length: 541
Date: Fri, 25 Jan 2013 19:38:41 GMT
Content-Type: application/json; charset=utf-8
Server: Microsoft-IIS/7.5
Cache-Control: no-cache
X-AspNet-Version: 4.0.30319
X-MS-Server-Fqdn: W15-LYNC-SE1.contoso.com
X-Powered-By: ASP.NET

{
 "id":"97b6bd66",
 "_links":{
 "self":{"href":"/ucwa/oauth/v1/applications/101/people/presenceSubscriptions/97b6bd66"},
 "memberships":{"href":"/ucwa/oauth/v1/applications/101/people/presenceSubscriptionMemberships?presenceSubscriptionId=97b6bd66"},
 "addToPresenceSubscription":{"href":"/ucwa/oauth/v1/applications/101/people/presenceSubscriptionMemberships?presenceSubscriptionId=97b6bd66"}
 },
 "rel":"presenceSubscription"
}

If the presence subscription has expired when the extension request is submitted, a 404 Not Found response will be returned.

HTTP/1.1 404 Not Found
Connection: Keep-Alive
Content-Length: 148
Expires: -1
Date: Fri, 25 Jan 2013 23:43:00 GMT
Content-Type: application/json
Server: Microsoft-IIS/7.5
Cache-Control: no-cache
Pragma: no-cache
X-AspNet-Version: 4.0.30319
X-MS-Server-Fqdn: W15-LYNC-SE1.metio.ms
X-Powered-By: ASP.NET

{
 "code":"NotFound",
 "subcode":"ApplicationNotFound",
 "message":"An error occurred. Please retry. If the problem persists, contact your support team."
}

In this case, the application should recreate the subscription. See Subscribe to the presence of a group of contacts or Subscribe to the presence of selected contacts for information on how to create the presenceSubscription resource, depending on how the original request was created.