How to control http headers in JSF?

Question

PF 3.5(4.0), Omnifaces 1.6.3, Mojara 2.1.21

Is it possible to control http headers which will be sent inside of JSF xhtml page ? I mean something like:

Answer 1

You mean not to instruct the browser for caching it? Just use a filter and add what you want to your response header:

HttpServletResponse res = (HttpServletResponse) response;
if (!req.getRequestURI().startsWith(
        req.getContextPath() + ResourceHandler.RESOURCE_IDENTIFIER)) { // Skip JSF resources //
                                                                        // (CSS/JS/Images/etc)
    res.setHeader("Cache-Control", "no-cache, no-store, must-revalidate"); // HTTP 1.1.
    res.setHeader("Pragma", "no-cache"); // HTTP 1.0.
    res.setDateHeader("Expires", 0); // Proxies.
}

See also:

• HTTP response caching
• How do a web filter in JSF 2?
• How to control web page caching, across all browsers?

Answer 2

I found a simple solution by adding the line below to your XHTML page:

  <f:event type="preRenderView"
    listener="#{facesContext.externalContext.response.setHeader('Cache-Control', 'no-cache, no-store')}" />