rest - OPTIONS request for restful cross-domain using CORS

Question

On client side I'm using Ajax.post (jquery 1.5) with json. On server side I'm using rest resteasy-jaxrs-2.0.1.GA. I found somewhere that i should add couple of headers to server response and I've done with following filter:

public void doFilter(   ServletRequest req,
                        ServletResponse res,
                        FilterChain filterChain)
    throws IOException, ServletException {

    MyServletRequestWrapper httpReq    = new MyServletRequestWrapper((HttpServletRequest)req);
    HttpServletResponse    httpRes   = (HttpServletResponse)res;

    HttpSession session = httpReq.getSession();


    httpRes.addHeader(ACCESS_CONTROL_ALLOW_ORIGIN, "*");
    httpRes.addHeader(ACCESS_CONTROL_ALLOW_CREDENTIALS, "true");

   if (((HttpServletRequest) req).getMethod().equals("OPTIONS")){
        httpRes.addHeader(ACCESS_CONTROL_ALLOW_METHODS, "GET, POST, OPTIONS, PUT, DELETE");
        httpRes.addHeader(ACCESS_CONTROL_ALLOW_HEADERS, "content-type, x-requested-with, x-requested-by");
   }

  filterChain.doFilter(httpReq, httpRes);

}

It works fine cause to every single GET response above headers are added. Problem appears when I want to use POST request. When I use Ajax.post, at first server gets OPTIONS request and I've got following error:

Failed executing OPTIONS [REST_PATH] org.jboss.resteasy.spi.DefaultOptionsMethodException: No resource method found for options, return OK with Allow header

To solve above error I was trying to add method invoke with the same path as POST ([REST_PATH]) but with @OPTION annotation. In that case javac told me that symbol :class OPTIONS could not be found, even there is a OPTION.class in attached jaxrs library.

Any ideas to fix it? I would be very grateful for any clues.

Answer 1

This question is quite old, but as a reference for others with similar problems - just recently i came across a nice "CORS Filter" you may want to consider using. It's just a matter of adding the following lines to your web.xml and it works like a charm.

<filter>
    <filter-name>CORS</filter-name>
    <filter-class>com.thetransactioncompany.cors.CORSFilter</filter-class>
</filter>

<filter-mapping>
    <filter-name>CORS</filter-name>
    <servlet-name>MyServletNameGoesHere</servlet-name>
</filter-mapping>

and the maven dependency:

<dependency>
    <groupId>com.thetransactioncompany</groupId>
    <artifactId>cors-filter</artifactId>
    <version>1.5.1</version>
</dependency>