Question
How to run external executable within BVMS SDK scriplet?
Answer
For more details about how to execute scriplets in the BVMS SDK, please check:
External processes can be started within server scriptlets. Check details on C# System.Diagnostics, Process Class.
System.Diagnostics.Process.Start("C:
temp
executable.exe");
Limitation to keep in mind is that when they have some UI, this is never shown and there is no user interaction possible, because they are running under the 'Local System' account. The reason is that Windows services can't start applications with UI and this is one Windows security design rule.
Further explanation for the above Limitation
The CentralServer which executes ServerScripts is running as Windows service under the 'Local System' account. Windows services are prohibited from interacting with a user or the desktop.
When a ServerScript starts further processes, they will be started, but they are child processes and they derive all properties from the parent process. That includes the user context, all security attributes and limitations as well. In this case, the new created child process is prohibited from interacting with a user or the desktop.
advancedINLINEgreenINLINE
Please contact CTS / SG or GK team to view this section from draft space, if necessaryadINLINE
Information below is for CTS, SG, GK reference and must be kept internal only.
If you are part of CTS, SG or GK team, please hide this section when you have finished using this article!
These are notes how to start external process that has UI within BVMS scriplet. This method requires programming effort.
- creation of an UI application which opens an endpoint for inter-process-communication (IPC), e.g. a socket server.
- The virtual input event starts execution of a server scriptlet, which connects to the IPC endpoint and sends some information (event name, state...).
- The UI application receives the information and triggers the "certain action" which is mentioned above. This application could also run on a different machine - the server scriplet could establish a connection to an endpoint on an other machine.Here is an example server scriptlet which connects to a socket server.
These information bases on following article:
https://learn.microsoft.com/en-us/dotnet/fundamentals/networking/sockets/socket-services
public void SendDataBySocketClient(EventData e)
{this.Logger.Info("SendDataBySocketClient - Start script execution");
try
{
// Example for getting the endpoint of the socket server: local host and port 11000 are used here
.
var strHostName = Dns.GetHostName();
this.Logger.Info("SendDataBySocketClient - Local Machine's Host Name: " + strHostName);
IPHostEntry ipEntry = Dns.GetHostEntry(strHostName);
IPAddress ipAddress = ipEntry.AddressList[0];
IPEndPoint ipEndPoint = new IPEndPoint(ipAddress, 11000);
Socket client = new Socket(ipEndPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
client.Connect(ipEndPoint);
while (true)
{
// Example for sending a message.
var message = "EventType:" + e.Type + " DeviceName:" + e.DeviceName + " StateInfo:" + e.State.New + "<|EOM|>";
var messageBytes = Encoding.UTF8.GetBytes(message);
client.Send(messageBytes, SocketFlags.None);
// Example for 'any kind of' handshake:
var buffer = new byte[1024];
var received = client.Receive(buffer, SocketFlags.None);
var response = Encoding.UTF8.GetString(buffer, 0, received);
if (response == "<|ACK|>")
{ this.Logger.Info("SendDataBySocketClient - Socket client received acknowledgment: " + response); break; }
}
client.Shutdown(SocketShutdown.Both);
}
catch (Exception ex)
{ this.Logger.Info("SendDataBySocketClient - Exception: " + ex.ToString()); }
// this.Logger.Info("SendDataBySocketClient - Finish script execution");
}
| Scroll only | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ||||||||||||||
You are using an Offline Version of these Article, please ensure to regularly check the corresponding online article on the Bosch Building Technologies Knowledge Base for any updates. Use the date and version information of the document as reference. This is |