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emag/x-forwarded-for-rule.btm

Last active December 20, 2015 02:09
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This is a Byteman rule to get real IP from request via proxy(such as load balancer, reverce proxy). Simply replacing HttpServletRequest#getRemoteAddr return value with HTTP Header: x-forwarded-for value. I tested it on WildFly 8.0.0.Alpha3, JBoss AS 7.1, Tomcat 7.
Raw
x-forwarded-for-rule.btm
RULE x-forwarded-for
INTERFACE javax.servlet.http.HttpServletRequest
METHOD getRemoteAddr
AT EXIT
IF $0.getHeader("x-forwarded-for") != null
DO
RETURN $0.getHeader("x-forwarded-for")
ENDRULE
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