private void processCachedResource(Payload payload, boolean content) throws Exception {

        String requestURI = payload.getRequestURI();
        HttpServletResponse response = payload.getResponse();
        HttpServletRequest request = payload.getRequest();

        // Validate the requested file ------------------------------------------------------------
        // Get requested file by path info.
        // Check if file is actually supplied to the request URL.

        CacheData cacheData = binaryCacheService.getCacheData(requestURI);


        if (Objects.isNull(requestURI) || Objects.isNull(cacheData)) {
            // Do your thing if the file is not supplied to the request URL.
            // Throw an exception, or send 404, or show default/warning page, or just ignore it.
            response.setStatus(HttpServletResponse.SC_NO_CONTENT);
            response.setDateHeader("Expires", DEFAULT_EXPIRE_TIME);
            response.setHeader("Cache-Control", String.format("public, max-age=%d", DEFAULT_EXPIRE_TIME));
            response.getWriter().close();
            return;
        }

//        File file = path.toFile();

        // Prepare some variables. The ETag is an unique identifier of the file.
        String fileName = requestURI;
        long length = cacheData.length();
        long lastModified = cacheData.lastModified();
        String eTag = fileName + "_" + length + "_" + lastModified;
        long expires = System.currentTimeMillis() + DEFAULT_EXPIRE_TIME;


        // Validate request headers for caching ---------------------------------------------------

        // If-None-Match header should contain "*" or ETag. If so, then return 304.
        String ifNoneMatch = request.getHeader("If-None-Match");
        if (ifNoneMatch != null && matches(ifNoneMatch, eTag)) {
            setNotModified(response, eTag, expires);
            return;
        }

        // If-Modified-Since header should be greater than LastModified. If so, then return 304.
        // This header is ignored if any If-None-Match header is specified.
        long ifModifiedSince = request.getDateHeader("If-Modified-Since");
        if (ifNoneMatch == null && ifModifiedSince != -1 && ifModifiedSince + 1000 > lastModified) {
            setNotModified(response, eTag, expires);
            return;
        }


        // Validate request headers for resume ----------------------------------------------------

        // If-Match header should contain "*" or ETag. If not, then return 412.
        String ifMatch = request.getHeader("If-Match");
        if (ifMatch != null && !matches(ifMatch, eTag)) {
            response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED);
            return;
        }

        // If-Unmodified-Since header should be greater than LastModified. If not, then return 412.
        long ifUnmodifiedSince = request.getDateHeader("If-Unmodified-Since");
        if (ifUnmodifiedSince != -1 && ifUnmodifiedSince + 1000 <= lastModified) {
            response.sendError(HttpServletResponse.SC_PRECONDITION_FAILED);
            return;
        }


        // Validate and process range -------------------------------------------------------------

        // Prepare some variables. The full Range represents the complete file.
        Range full = new Range(0, length - 1, length);
        List<Range> ranges = new ArrayList<Range>();

        // Validate and process Range and If-Range headers.
        String range = request.getHeader("Range");
        if (range != null) {

            // Range header should match format "bytes=n-n,n-n,n-n...". If not, then return 416.
            if (!range.matches("^bytes=\\d*-\\d*(,\\d*-\\d*)*$")) {
                response.setHeader("Content-Range", "bytes */" + length); // Required in 416.
                response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE);
                return;
            }

            // If-Range header should either match ETag or be greater then LastModified. If not,
            // then return full file.
            String ifRange = request.getHeader("If-Range");
            if (ifRange != null && !ifRange.equals(eTag)) {
                try {
                    long ifRangeTime = request.getDateHeader("If-Range"); // Throws IAE if invalid.
                    if (ifRangeTime != -1 && ifRangeTime + 1000 < lastModified) {
                        ranges.add(full);
                    }
                } catch (IllegalArgumentException ignore) {
                    ranges.add(full);
                }
            }

            // If any valid If-Range header, then process each part of byte range.
            if (ranges.isEmpty()) {
                for (String part : range.substring(6).split(",")) {
                    // Assuming a file with length of 100, the following examples returns bytes at:
                    // 50-80 (50 to 80), 40- (40 to length=100), -20 (length-20=80 to length=100).
                    long start = sublong(part, 0, part.indexOf("-"));
                    long end = sublong(part, part.indexOf("-") + 1, part.length());

                    if (start == -1) {
                        start = length - end;
                        end = length - 1;
                    } else if (end == -1 || end > length - 1) {
                        end = length - 1;
                    }

                    // Check if Range is syntactically valid. If not, then return 416.
                    if (start > end) {
                        response.setHeader("Content-Range", "bytes */" + length); // Required in 416.
                        response.sendError(HttpServletResponse.SC_REQUESTED_RANGE_NOT_SATISFIABLE);
                        return;
                    }

                    // Add range.
                    ranges.add(new Range(start, end, length));
                }
            }
        }


        // Prepare and initialize response --------------------------------------------------------

        // Get content type by file name and set default GZIP support and content disposition.
        String contentType = request.getServletContext().getMimeType(fileName);
        boolean acceptsGzip = false;
        String disposition = "inline";

        // If content type is unknown, then set the default value.
        // For all content types, see: http://www.w3schools.com/media/media_mimeref.asp
        // To add new content types, add new mime-mapping entry in web.xml.
        if (contentType == null) {
            contentType = "application/octet-stream";
        }

        // If content type is text, then determine whether GZIP content encoding is supported by
        // the browser and expand content type with the one and right character encoding.
        if (contentType.startsWith("text")) {
            String acceptEncoding = request.getHeader("Accept-Encoding");
            acceptsGzip = acceptEncoding != null && accepts(acceptEncoding, "gzip");
            contentType += ";charset=UTF-8";
        }

        // Else, expect for images, determine content disposition. If content type is supported by
        // the browser, then set to inline, else attachment which will pop a 'save as' dialogue.
        else if (!contentType.startsWith("image")) {
            String accept = request.getHeader("Accept");
            disposition = accept != null && accepts(accept, contentType) ? "inline" : "attachment";
        }

        // Initialize response.
        response.reset();
        response.setBufferSize(DEFAULT_BUFFER_SIZE);
        response.setHeader("Content-Disposition", disposition + ";filename=\"" + fileName + "\"");
        response.setHeader("Accept-Ranges", "bytes");
        response.setHeader("ETag", eTag);
        response.setDateHeader("Last-Modified", lastModified);
        response.setHeader("Cache-Control", String.format("public, max-age=%d", DEFAULT_EXPIRE_TIME));
        response.setDateHeader("Expires", expires);


        // Send requested file (part(s)) to client ------------------------------------------------

        // Prepare streams.
        OutputStream output = null;

        try {
            // Open streams.
            output = response.getOutputStream();

            if (ranges.isEmpty() || ranges.get(0) == full) {

                // Return full file.
                Range r = full;
                response.setContentType(contentType);
                response.setHeader("Content-Range", "bytes " + r.start + "-" + r.end + "/" + r.total);

                if (content) {
                    if (acceptsGzip) {
                        // The browser accepts GZIP, so GZIP the content.
                        response.setHeader("Content-Encoding", "gzip");
                        output = new GZIPOutputStream(output, DEFAULT_BUFFER_SIZE);
                    } else {
                        // Content length is not directly predictable in case of GZIP.
                        // So only add it if there is no means of GZIP, else browser will hang.
                        response.setHeader("Content-Length", String.valueOf(r.length));
                    }

                    // Copy full range.
                    copy(cacheData, output, r.start, r.length);
                }

            } else if (ranges.size() == 1) {

                // Return single part of file.
                Range r = ranges.get(0);
                response.setContentType(contentType);
                response.setHeader("Content-Range", "bytes " + r.start + "-" + r.end + "/" + r.total);
                response.setHeader("Content-Length", String.valueOf(r.length));
                response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT); // 206.

                if (content) {
                    // Copy single part range.
                    copy(cacheData, output, r.start, r.length);
                }

            } else {

                // Return multiple parts of file.
                response.setContentType("multipart/byteranges; boundary=" + MULTIPART_BOUNDARY);
                response.setStatus(HttpServletResponse.SC_PARTIAL_CONTENT); // 206.

                if (content) {
                    // Cast back to ServletOutputStream to get the easy println methods.
                    ServletOutputStream sos = (ServletOutputStream) output;

                    // Copy multi part range.
                    for (Range r : ranges) {
                        // Add multipart boundary and header fields for every range.
                        sos.println();
                        sos.println("--" + MULTIPART_BOUNDARY);
                        sos.println("Content-Type: " + contentType);
                        sos.println("Content-Range: bytes " + r.start + "-" + r.end + "/" + r.total);

                        // Copy single part range of multi part range.
                        copy(cacheData, output, r.start, r.length);
                    }

                    // End with multipart boundary.
                    sos.println();
                    sos.println("--" + MULTIPART_BOUNDARY + "--");
                }
            }
        } finally {
            // Gently close streams.
            close(output);
            cacheData.closeStream();
        }
    }
", "/afx/cache/*.*"}, method = {GET, HEAD, OPTIONS, POST}, produces = "
src/main/java/com/kodedu/controller/CacheResource.java