Get the HTML markup for a resource in AEM / CQ.

AemResourceResolutionServlet.java

package com.nateyolles.aem;

import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.sling.SlingServlet;

import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.servlets.SlingSafeMethodsServlet;
import org.apache.sling.engine.SlingRequestProcessor;

import com.day.cq.contentsync.handler.util.RequestResponseFactory;
import com.day.cq.wcm.api.WCMMode;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import java.io.ByteArrayOutputStream;
import java.io.IOException;

@SlingServlet(paths={"/bin/foo"})
public class AemResourceResolutionServlet extends SlingSafeMethodsServlet {

    /** Service to create HTTP Servlet requests and responses */
    @Reference
    private RequestResponseFactory requestResponseFactory;

    /** Service to process requests through Sling */
    @Reference
    private SlingRequestProcessor requestProcessor;

    @Override
    protected void doGet(SlingHttpServletRequest request, SlingHttpServletResponse response) throws ServletException, IOException {

        response.setContentType("text/plain");
    	// This path works Just Fine - since the static.css is in the JCR
    	// String path = "/etc/designs/geometrixx/static.css";
    	
    	// This path doesn't
    	String path = "/etc/designs/geometrixx/clientlibs.css";

        /* Setup request */
        HttpServletRequest req = requestResponseFactory.createRequest("GET", requestPath);
        WCMMode.DISABLED.toRequest(req);

        /* Setup response */
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        HttpServletResponse resp = requestResponseFactory.createResponse(out);

        /* Process request through Sling */
        requestProcessor.processRequest(req, resp, request.getResourceResolver());
        String html = new String(out.toByteArray(), "UTF-8");
        response.getWriter().println(html);
    }
}