public void Subscribe(GenaMessage request, GenaMessage response)
{
VerifyHeaders(request);
//subscribe
var sub = new GenaSubscription();
lock (_subscriptions)
{
this._subscriptions.Add(sub.SubscriptionId, sub);
}
sub.Callbacks = request.Callbacks;
sub.RenewInterval = request.Timeout ?? TimeSpan.MaxValue;
if (sub.RenewInterval != TimeSpan.MaxValue)
{
_dispatcher.Add(() => CheckSubscription(sub), sub.RenewInterval);
}
//update timeout value if one is present
RespondToSubscribe(request, response, sub);
/**
* SUBSCRIBE:
*
* SUBSCRIBE publisher path HTTP/1.1
* HOST: publisher host:publisher port
* USER-AGENT: OS/version UPnP/1.1 product/version
* CALLBACK: <delivery URL>
* NT: upnp:event
* TIMEOUT: Second-requested subscription duration
*
* SUBSCRIBE RESPONSE:
*
* HTTP/1.1 200 OK
* DATE: when response was generated
* SERVER: OS/version UPnP/1.1 product/version
* SID: uuid:subscription-UUID
* CONTENT-LENGTH: 0
* TIMEOUT: Second-actual subscription duration
*
* RENEWAL:
* SUBSCRIBE publisher path HTTP/1.1
* HOST: publisher host:publisher port
* SID: uuid:subscription UUID
* TIMEOUT: Second-requested subscription duration
*
* RENEWAL RESPONSE is the same as SUBSCRIBE RESPONSE
*
*/
}
public void Subscribe(GenaMessage request, GenaMessage response)
{
VerifyHeaders(request);
//subscribe
var sub = new GenaSubscription();
lock (_subscriptions)
{
this._subscriptions.Add(sub.SubscriptionId, sub);
}
sub.Callbacks = request.Callbacks;
sub.RenewInterval = request.Timeout ?? TimeSpan.MaxValue;
if(sub.RenewInterval != TimeSpan.MaxValue)
_dispatcher.Add(() => CheckSubscription(sub), sub.RenewInterval);
//update timeout value if one is present
RespondToSubscribe(request, response, sub);
/**
* SUBSCRIBE:
*
* SUBSCRIBE publisher path HTTP/1.1
* HOST: publisher host:publisher port
* USER-AGENT: OS/version UPnP/1.1 product/version
* CALLBACK: <delivery URL>
* NT: upnp:event
* TIMEOUT: Second-requested subscription duration
*
* SUBSCRIBE RESPONSE:
*
* HTTP/1.1 200 OK
* DATE: when response was generated
* SERVER: OS/version UPnP/1.1 product/version
* SID: uuid:subscription-UUID
* CONTENT-LENGTH: 0
* TIMEOUT: Second-actual subscription duration
*
* RENEWAL:
* SUBSCRIBE publisher path HTTP/1.1
* HOST: publisher host:publisher port
* SID: uuid:subscription UUID
* TIMEOUT: Second-requested subscription duration
*
* RENEWAL RESPONSE is the same as SUBSCRIBE RESPONSE
*
*/
}
private void CheckSubscription(GenaSubscription sub)
{
var time = sub.NextRenewal.Subtract(DateTime.Now);
if (time.TotalMilliseconds <= 0)
{
//expired so remove the sub
lock (_subscriptions)
{
this._subscriptions.Remove(sub.SubscriptionId);
}
}
else
{
//check again once our time is up
_dispatcher.Add(() => CheckSubscription(sub), time);
}
}
private void CheckSubscription(GenaSubscription sub)
{
var time = sub.NextRenewal.Subtract(DateTime.Now);
if (time.TotalMilliseconds <= 0)
{
//expired so remove the sub
lock (_subscriptions)
{
this._subscriptions.Remove(sub.SubscriptionId);
}
}
else
{
//check again once our time is up
_dispatcher.Add(() => CheckSubscription(sub), time);
}
}
private static void RespondToSubscribe(GenaMessage request, GenaMessage response, GenaSubscription sub)
{
var timeout = request.Timeout;
if (timeout.HasValue)
sub.RenewInterval = timeout.Value;
response.SubscriptionId = sub.SubscriptionId;
response.Timeout = sub.RenewInterval;
response.Date = DateTime.Now;
response.UserAgent = String.Format("{0}/{1} UPnP/1.1 UPnPLib/1.1", Environment.OSVersion.Platform, Environment.OSVersion.Version); ;
}
private static void RespondToSubscribe(GenaMessage request, GenaMessage response, GenaSubscription sub)
{
var timeout = request.Timeout;
if (timeout.HasValue)
{
sub.RenewInterval = timeout.Value;
}
response.SubscriptionId = sub.SubscriptionId;
response.Timeout = sub.RenewInterval;
response.Date = DateTime.Now;
response.UserAgent = String.Format("{0}/{1} UPnP/1.1 UPnPLib/1.1", Environment.OSVersion.Platform, Environment.OSVersion.Version);;
}
