/// <summary>
/// Try to find the physical address of a service using discovery functions.
/// Uses the http://schemas.xmlsoap.org/ws/2005/04/discovery/Probe message and
/// http://schemas.xmlsoap.org/ws/2005/04/discovery/Resolve message.
/// </summary>
/// <returns>The endpoint of the service, null otherwise.</return>
public static EndpointAddress[] FindServiceAddress()
{
Dictionary <Uri, EndpointAddress> ret = new Dictionary <Uri, EndpointAddress>();
// Creating DiscoveryClient class.
DiscoveryClient discoveryClient = new DiscoveryClient(new UdpDiscoveryEndpoint(DiscoveryVersion.WSDiscoveryApril2005));
;
Console.Write("Finding for all services in the network (empty criteria)...");
FindResponse findResponseX = discoveryClient.Find(new FindCriteria()
{
Duration = new TimeSpan(0, 0, 2)
});
Console.WriteLine("{0} found.\n", findResponseX.Endpoints.Count);
// Search for each endpoint found to resolve the address given.
if (findResponseX.Endpoints.Count > 0)
{
foreach (EndpointDiscoveryMetadata meta in findResponseX.Endpoints)
{
if (ret.ContainsKey(meta.Address.Uri))
{
continue;
}
// Get all contracts of the endpoints.
foreach (System.Xml.XmlQualifiedName type in meta.ContractTypeNames)
{
// Check if its a valid contract.
foreach (System.Xml.XmlQualifiedName name in deviceTypes.Keys)
{
if (type.Equals(name))
{
ResolveResponse resolveResponse = discoveryClient.Resolve(new ResolveCriteria(meta.Address));
Console.WriteLine("New device found: {0}:{1} at {2}", name.Namespace, name.Name, resolveResponse.EndpointDiscoveryMetadata.ListenUris[0]);
edu.teco.DPWS.Device device = (edu.teco.DPWS.Device)Activator.CreateInstance(deviceTypes[name]);
device.EndpointAddress = new EndpointAddress(resolveResponse.EndpointDiscoveryMetadata.ListenUris[0]);
GetMetaData(device);
device.Init();
knownDevices.Add(device);
ret.Add(meta.Address.Uri, new EndpointAddress(resolveResponse.EndpointDiscoveryMetadata.ListenUris[0]));
Console.WriteLine("Service can now be invoked");
break;
}
}
}
}
}
return(ret.Values.ToArray());
}
private static void OnOnlineAnnouncement(object sender, AnnouncementEventArgs e)
{
Console.WriteLine("Hello!");
EndpointDiscoveryMetadata metadata = e.EndpointDiscoveryMetadata;
// Check if service is SSimpDeviceType which is the Host service used
foreach (System.Xml.XmlQualifiedName type in metadata.ContractTypeNames)
{
foreach (System.Xml.XmlQualifiedName name in deviceTypes.Keys)
{
if (type.Equals(name))
{
Console.WriteLine("New device found: {0}:{1} at {2}", name.Namespace, name.Name, metadata.ListenUris[0]);
edu.teco.DPWS.Device device = (edu.teco.DPWS.Device)Activator.CreateInstance(deviceTypes[name]);
device.EndpointAddress = new EndpointAddress(metadata.ListenUris[0]);
GetMetaData(device);
device.Init();
knownDevices.Add(device);
Console.WriteLine("Service can now be invoked");
break;
}
}
}
}
