Get URL for a published NetService instance

url.swift

  extension NetService {
	
	var url: URL? {
		get {
			if self.port != -1 {
				var urlComponents = URLComponents()
				urlComponents.scheme = "http"
				if let hostName = self.hostName {
					urlComponents.host = hostName.lowercased()
				}
				else {
					urlComponents.host = ProcessInfo.processInfo.hostName + "."
				}
				if self.port != 80 {
					urlComponents.port = self.port
				}
				
				return urlComponents.url
			}
			else {
				return nil
			}
		}
	}

  }