Is there a way, at the web server level (web.xml) to set headers for all transactions? Specifically, I would like to do this:
response.setHeader("Cache-Control", "no-cache, no-store");
response.setDateHeader("Expires", -1);
at the application level. I seem to recall that headers could be set in the Web.xml. 开发者_如何学Python Are there other solutions?
Implement a javax.servlet.Filter
, write appropriate logic in doFilter()
method and finally map it in web.xml
on an url-pattern
of /*
.
By the way, the 'magic' set which works in all known browsers and proxies are those:
response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate"); // HTTP 1.1.
response.setHeader("Pragma", "no-cache"); // HTTP 1.0.
response.setDateHeader("Expires", 0); // Proxies.
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