jetty websocket server: Send customer status code based on application logic
I am writing a Websocket server using Jetty.
My handler code:
public class WebSocketServerHandler {
@OnWebSocketClose
public void onClose(int statusCode, String reason) {
System.out.println("Close: statusCode=" + statusCode + ", reason=" + reason);
}
@OnWebSocketError
public void onError(Throwable t) {
}
@OnWebSocketConnect
public void onConnect(Session session) {
}
@OnWebSocketMessage
public void onMessage(Session session, String message) {
}
@OnWebSocketMessage
public void onBinaryMethod(Session session, byte data[], int offset, int length) {
}
}
One of my requirement is to send custom status code based on business logic insde onBinaryMethod
eg: Send 1001 as status code for timeout (Jetty already support this)
I am not sure where to set these status codes. I have tried following but that doesn't seems to work.
Session().getUpgradeResponse().setStatusCode();
WebSockets
Here is the RFC regarding the status codes of WebSocket.
During the communication with the socket You are not supposed to send such information in status codes. Send a message instead with the information which is needed by the client.
If you happen to be interested in closing codes you can supply this information on the Session object as follows:
session.close(new CloseReason(YOUR_NUMBER, "Your reason"));
REST
If You rely on those codes use REST services , there are a lot of options there:
I think the easiest way to achieve Your goal is to use setStatus(int) :
@Context
HttpServletResponse response;
@Path("/method")
public void onBinaryMethod() {
int statusCode = 200;
//SOME CODE
response.setStatus(statusCode);
}
Here is a nice answer listing a lot of possible solutions:
https://stackoverflow.com/a/22869076/4823977
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