java - How to set and check cookies wih JAX-RS?

Question

I am a noobie with RESTful API and I am trying to build a Login service in which I provide an email and password and if the validation is successful - to store a cookie. In addition, how do I check the cookie(if stored)?

How can this be achieved?

@Path("/login")
@POST
@Produces(MediaType.APPLICATION_JSON)
@Consumes({MediaType.APPLICATION_FORM_URLENCODED, MediaType.APPLICATION_JSON})
public Response Login(final String i_LoginDetails) throws JSONException {
    final JSONObject obj = new JSONObject(i_LoginDetails);
    try {
        if (isValidUser(obj.getString("email"), obj.getString("password"))) {
            // Set a cookie
        } else {
            // return error invalid-credentials message
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return Response.ok("TEST").build();
}

And how do I check the cookie(if set)?

Answer 1

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.