问题
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:
.xhtml:
<html xmlns:http="a cool name space">
<h:head>
<http:headers header="Cache-Control" value="no-cache, no-store, must-revalidate" />
</h:head>
<h:body> .... </h:body>
</html>
回答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?
回答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')}" />
来源：https://stackoverflow.com/questions/20263902/how-to-control-http-headers-in-jsf