Using cookies with Struts 2 and Struts

Question

I\'ve got the following (shortened) struts2 action:

public class MyAction extends BaseAction implements CookiesAware {

  public String execute() {

    if (         


        

Answer 1

You need to also implement the Cookie Interceptor for the action definition in your struts.xml:

<action name="MyAction" class="your.fancy.app.MyAction">
    <interceptor-ref name="defaultStack"/>       
    <interceptor-ref name="cookie">
        <param name="cookiesName">BLAH</param>
    </interceptor-ref>
    <result>/index.jsp</result>
</action>

Answer 2

It appears that struts only supports reading cookies, you have to go to the servlet response to actually set a cookie.

In the end, i've opted to bypass the struts2 cookie support entirely and go directly to the servlet request/response objects for both reading and writing:

public class MyAction extends ActionSupport implements ServletResponseAware, ServletRequestAware {

  public int division;

  public String execute() {

    // Load from cookie
    for(Cookie c : servletRequest.getCookies()) {
      if (c.getName().equals("cookieDivision"))
        division=Integer.parseInt(c.getValue());
    }

    // Save to cookie
    Cookie div = new Cookie("cookieDivision", String.format("%d",division));
    div.setMaxAge(60*60*24*365); // Make the cookie last a year
    servletResponse.addCookie(div);

    return "success";
  }

  // For access to the raw servlet request / response, eg for cookies
  protected HttpServletResponse servletResponse;
  @Override
  public void setServletResponse(HttpServletResponse servletResponse) {
    this.servletResponse = servletResponse;
  }

  protected HttpServletRequest servletRequest;
  @Override
  public void setServletRequest(HttpServletRequest servletRequest) {
    this.servletRequest = servletRequest;
  }
}

And there's no configuration required for this method in either struts.xml or web.xml, which is a bonus. So i'm happy with this solution, even if it does paint struts2 in a poor light.

Answer 3

While I'm aware that the question is now more than 3 years old, today I needed to set a cookie with Struts2, landed here, and managed to set cookies in a Struts2-y way (using 2.3.16). Hope this will help some others.

In order to set cookies with Struts2, you need to follow these steps:

1. Have your Action implement org.apache.struts2.interceptor.CookieProvider. (You might want to see its javadoc)
2. Implement the Set<Cookie> getCookies(); method, returning all the cookies you want to set.
3. Make your Action use the cookieProvider interceptor the same way as @Pat mentioned in his answer.

<action name="MyAction" class="your.fancy.app.MyAction">
    <interceptor-ref name="defaultStack"/>
    <interceptor-ref name="cookieProvider"/>
    <result>/index.jsp</result>
</action>

If you set a domain for a cookie, when you test this setup make sure you're requesting a URL under that domain. In my case, I didn't realize I was accessing my test machine directly instead of going through the domain, and the cookie wasn't being set.

Answer 4

Following article has more details on how to use cookie aware interface http://www.journaldev.com/2203/how-to-get-servlet-session-request-response-context-attributes-in-struts-2-action