CODEWITHSUNDEEP
javawebsocket
ZdeenaP
ZdeenaP

Reputation: 83

Websocket getting remote IP on connect

Can I get remote IP address inside @OnOpen method of @ServletEndpoint class? I tried follow this Accessing HttpSession from HttpServletRequest in a Web Socket @SocketEndpoint but as in Websocket - httpSession returns null it doesn't work.

Anyway I only need clients IP address.

Upvotes: 8

Views: 17499

Answers (3)

weberjn
weberjn

Reputation: 1985

Usually the client will be some Javascript code in a web page delivered by your web application.

Have the client first fetch a servlet, that calls req.getRemoteAddr() and so on Servlet returns this data. Javascript then can send the data as @PathParam to the @ServerEndpoint.

Upvotes: 0

Aere Xu
Aere Xu

Reputation: 289

Added: Works for Jetty implementation and it's not a common solution. Thanks to Benjamin !

Don't know if you still need it. I myself directly get the IP from the socket Session.

@OnOpen
public void onWebSocketConnect(Session session) {
    System.Out.println(session.getUserProperties().get("javax.websocket.endpoint.remoteAddress"))
}

Then I get /127.0.0.1:57045

Upvotes: 4

Benjamin
Benjamin

Reputation: 1846

The JSR-356 Websocket specification does not expose client IP address.

You may try one of the 2 hacks descibed in this response: JSR-356 WebSockets with Tomcat - How to limit connections within single IP address?

Upvotes: 4

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