@Override
public void setContentType(String contentType) {
super.setHeader("Expires", "-1");
super.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
logger.debug("Header changed successfully");
super.setContentType(contentType);
}
@Override
public void setHeader(String name, String value) {
if (name.equals(LOCATION)) {
String newLocation = mapLocation(value.trim());
super.setHeader(name, newLocation);
} else {
super.setHeader(name, value);
}
}
/** {@inheritDoc} */
public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) req;
HttpServletResponseWrapper response =
new HttpServletResponseWrapper((HttpServletResponse) resp);
String encoding = request.getHeader("Accept-Encoding");
boolean supportsGzip = false;
// Now, check to see if the browser supports the GZIP compression
if (encoding != null) {
if (encoding.toLowerCase().indexOf("gzip") > -1) supportsGzip = true;
}
Debug.log(
"supportsGzip : "
+ supportsGzip
+ ", encoding : "
+ encoding
+ ", requestURL : "
+ request.getRequestURL());
if (supportsGzip) {
// add content encoding
response.setHeader("Content-Encoding", "gzip");
GzipResponse compressionResponse = new GzipResponse(response);
chain.doFilter(request, compressionResponse);
compressionResponse.close();
} else {
chain.doFilter(req, resp);
}
}
@Override
public void setHeader(String name, String value) {
super.setHeader(name, value);
headers.put(name, value);
}