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 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);;
}
public void Unsubscribe(GenaMessage request, GenaMessage response)
{
VerifyHeaders(request);
var sid = request.SubscriptionId;
lock (_subscriptions)
{
if (!_subscriptions.ContainsKey(sid))
{
throw new GenaException(HttpStatusCode.PreconditionFailed);
}
_subscriptions.Remove(sid);
}
}
public void Renew(GenaMessage request, GenaMessage response)
{
GenaSubscription sub;
var sid = request.SubscriptionId;
//renew
lock (_subscriptions)
{
if (!_subscriptions.TryGetValue(sid, out sub))
throw new GenaException(HttpStatusCode.PreconditionFailed);
}
sub.Renew();
RespondToSubscribe(request, response, sub);
}
private static void VerifyHeaders(GenaMessage message)
{
if (message == null)
{
throw new GenaException(HttpStatusCode.BadRequest);
}
var sid = message.SubscriptionId;
var nt = message.NotificationType;
var callbacks = message.Callbacks;
//If a SID header field and one of NT or CALLBACK header fields are present.
if (!string.IsNullOrEmpty(sid) && (!string.IsNullOrEmpty(nt) || callbacks != null))
{
throw new GenaException(HttpStatusCode.BadRequest);
}
}
public void Renew(GenaMessage request, GenaMessage response)
{
GenaSubscription sub;
var sid = request.SubscriptionId;
//renew
lock (_subscriptions)
{
if (!_subscriptions.TryGetValue(sid, out sub))
{
throw new GenaException(HttpStatusCode.PreconditionFailed);
}
}
sub.Renew();
RespondToSubscribe(request, response, sub);
}
public GenaMessageEventArgs(string serviceId)
{
this.ServiceId = serviceId;
this.Request = GenaMessage.CreateRequest();
this.Response = GenaMessage.CreateResponse();
}
private static void VerifyHeaders(GenaMessage message)
{
if (message == null)
throw new GenaException(HttpStatusCode.BadRequest);
var sid = message.SubscriptionId;
var nt = message.NotificationType;
var callbacks = message.Callbacks;
//If a SID header field and one of NT or CALLBACK header fields are present.
if (!string.IsNullOrEmpty(sid) && (!string.IsNullOrEmpty(nt) || callbacks != null))
throw new GenaException(HttpStatusCode.BadRequest);
}
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); ;
}
public void Unsubscribe(GenaMessage request, GenaMessage response)
{
VerifyHeaders(request);
var sid = request.SubscriptionId;
lock (_subscriptions)
{
if (!_subscriptions.ContainsKey(sid))
throw new GenaException(HttpStatusCode.PreconditionFailed);
_subscriptions.Remove(sid);
}
}
