Struts response raw string

I have a Struts project where I need to send a response as a raw string

struts.xml:

<struts>
  <constant name="struts.devMode" value="true"></constant>
  <constant name="struts.ui.theme" value="simple"></constant>
  <constant name="struts.xwork.chaining.copyErrors" value="true"></constant>
  <constant name="struts.xwork.chainingcopyMessages" value="true"></constant>

  <package name="basicstruts6" extends="struts-default" namespace="/">
    <default-action-ref name="init"></default-action-ref>


    <action name="init" class="some.class.path.mvc.ServiceTestAction" method="init">
      <result name="success">/WEB-INF/app/index.jsp</result>
    </action>

    <action name="invokeService" class="some.class.path.mvc.ServiceTestAction" method="execute">
      <result name="success">/WEB-INF/app/index.jsp</result>
    </action>

  </package>
</struts>

In the <action name="invokeService" class="some.class.path.mvc.ServiceTestAction" method="execute"> I want to repond with a raw string I define without using the index.jsp file as model.

I still want some.class.path.mvc.ServiceTestAction to handle the request, but want to write directly to the response writer

And at the same time I want to set the HTTP code of the response. In case it's an error I want to respond with HTTP 400 and write the body directly to the response writer.

Solution

If you don't want to return index.jsp as a result then you should remove this code in the struts.xml

<result name="success">/WEB-INF/app/index.jsp</result>
    </

In the action class execute() method where the return SUCCESS put return NONE.

You can get HttpServletRequest and HttpServletResponse if your action class implements ServletRequestAware and ServletResponseAware.

You can also read this answer: How to get the request body and response body in apache struts2? - post using $.ajax.

In the action execute() method you write to the response some text using the servlet API. Something like

PrintWriter writer = httpServletResponse.getWriter();
writer.println("hello server");
writer.flush();
httpServletResponse.setStatus(400);