How to set and check cookies wih JAX-RS?

Question

You can do the following:

To store a new cookie:

@GET
@Path("/login")
@Produces(MediaType.TEXT_PLAIN)
public Response login() {
    NewCookie cookie = new NewCookie("name", "123");
    return Response.ok("OK").cookie(cookie).build();
}

To retrieve the cookie (javax.ws.rs.core.Cookie):

@GET
@Path("/foo")
@Produces(MediaType.TEXT_PLAIN)
public Response foo(@CookieParam("name") Cookie cookie) {
    if (cookie == null) {
        return Response.serverError().entity("ERROR").build();
    } else {
        return Response.ok(cookie.getValue()).build();
    }
}

However, you may only want the value:

@GET
@Path("/foo")
@Produces(MediaType.TEXT_PLAIN)
public Response foo(@CookieParam("name") String value) {
    System.out.println(value);
    if (value == null) {
        return Response.serverError().entity("ERROR").build();
    } else {
        return Response.ok(value).build();
    }
}

By the way, you may want to try the following code:

@GET
@Path("/logout")
@Produces(MediaType.TEXT_PLAIN)
public Response logout(@CookieParam("name") Cookie cookie) {
    if (cookie != null) {
        NewCookie newCookie = new NewCookie(cookie, null, 0, false);
        return Response.ok("OK").cookie(newCookie).build();
    }
    return Response.ok("OK - No session").build();
}

This removes the cookie in the browser. The behavior depends on the implementation of JAX-RS. With RESTEasy (JBoss AS 7.0) and Google Chrome works fine.

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