I'm trying the example from Tyrus, hoping that it could work on tomcat
https://tyrus.java.net/documentation/1.3/index/deployment.html
this is the simplest code to put ServletContext in userproperties
@WebListener
public class MyWebSocket implements ServletContextListener {
@Override
public void contextInitialized(ServletContextEvent
servletContextEvent) {
final ServerContainer serverContainer = (ServerContainer)
servletContextEvent.getServletContext()
.getAttribute("javax.websocket.server.ServerContainer");
try {
ServerEndpointConfig c =
ServerEndpointConfig.Builder.create(MyWebSocket.class, "/endpoint").build();
c.getUserProperties().put("servletContext",
servletContextEvent.getServletContext());
serverContainer.addEndpoint(c);
} catch (DeploymentException e) {
e.printStackTrace();
}
}
@OnOpen
public void onOpen(Session session, EndpointConfig config) {
try {
session.getBasicRemote().sendText("hello" +
config.getUserProperties());
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void contextDestroyed(ServletContextEvent servletContextEvent) {
}
}
unfortunately I got this exception onOpen
java.lang.NullPointerException
at
org.apache.tomcat.websocket.pojo.PojoEndpointBase.doOnOpen(PojoEndpointBase.java:56)
at
org.apache.tomcat.websocket.pojo.PojoEndpointServer.onOpen(PojoEndpointServer.java:70)
at
org.apache.tomcat.websocket.server.WsHttpUpgradeHandler.init(WsHttpUpgradeHandler.java:129)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:629)
at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)
Thanks
Enrico
Il 07/12/2013 15:33, Christopher Schultz ha scritto:
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
Johan,
On 12/7/13, 4:30 AM, Johan Compagner wrote:
On 7 December 2013 04:48, Christopher Schultz
<ch...@christopherschultz.net>wrote:
because i only see currently api to get the HttpSession and
then through that the ServletContext, problem is that there is
no http session..
Aah... if there is no session, getHttpSession doesn't
automatically create one(). Boo.
and can it create one?
if a browser does a ws: request that will be first just a http
request i guess that is then "upgraded" But in that first request
can cookies be send over? Because if a websocket creates a http
session then a jsessionid cookie must be set in the browser over
the websocket request. And that jsession cookie must then be used
by also normal http request a browser does to that server..
I'm no WebSocket expert, but the server has to first handle the
request as HTTP, and then upgrade it to WebSocket. The client can
establish a session first, then switch over to WebSocket and inherit
the session. I'm not sure if a "pure" WebSocket request can create a
session, since WebSocket is /not/ HTTP and therefore cookies are a bit
meaningless.
problem is that i don't want to create a session, i just want to
ServletContext to read some files.
Yup, I get it.
So something like:
EndpointConfig.getUserProperties().put("ServletContext",request.get
Context());
That context can then just return an object which i need to cast
and is then up to the container to provide.
I would lobby to have the container put the ServletContext into the
user properties -- just as you have above -- automatically during
connection set-up. There's nothing stopping Tomcat from doing that
right now, except that it would technically violate the spec and
introduce a non-standard vendor extension.
In this case, it's pretty clear that there is a quite desirable
feature missing from the spec and I think it might be reasonable to
violate it in this instance. I'd prefer to get Mark or Konstantin to
weigh-in on such a step, because it might set a bad precedent for Tomcat.
I'm certainly not going to commit that myself. :)
- -chris
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.15 (Darwin)
Comment: GPGTools - http://gpgtools.org
Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/
iQIcBAEBCAAGBQJSozG4AAoJEBzwKT+lPKRYwHUP/1/rTzHMuYnG0PydbKAffDOo
5D+/YABdkxvmAs49MhVJyAFs9QLZn3NNmuNLoLnxirkAx2lG1RHxOrnS2VdHWrgE
g5WH5gEoMFyl52rl6QOiaXBFNDfBG7X3kqn8TzUWRMkoxZbwoN5GGG6Uhk3jWv9x
rWw/Bos7DqmssfrT+Y8Uk9+TbegkP0s9r56FY9PUvVPFSqjALX9sFd7WpzEPS8up
NwbAMJpiFydgIwXTmMy69kmTgcvYacfrcbyZuhQmV2PllfKDbNt4THxgop6TXlYp
KrDu3YzINf0DSFUgXNkjz5WGXnstLxjgn943YX54Xy5WBe9zxndOPedMBW/gHGM+
3LdlnPaOM8OGWSu0PZxXXuLIu+oWUcB8oUKaeIMa8Yv1Zb9WIPXe6m3AlAebkfDB
9yDFjcmWS5Fpc/qaXYqrxGMoVZc22GyhijdVn1jd7tK9TJAtGpoMQrQArfcQdJb3
qcifW5iHraTeE8iDSFIj94puv4XoE5u2GwRIx+qRs9mtHdu36GUj9GfVy6tEhsFA
eyhpw8cpM9DrePMus9O0OecYiTQv4eXDPhzYhj+zsjipmIhza7dzedIg12l+gnaY
TONnC3tXsOOl5cioJPaRgwl4jVKBrlg1xMIA937ncPiqKFoX//8nJq9LaCds7Vrq
33lj6jBuGweANjNxGsRC
=qMXW
-----END PGP SIGNATURE-----
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
For additional commands, e-mail: users-h...@tomcat.apache.org
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
For additional commands, e-mail: users-h...@tomcat.apache.org
