https://bz.apache.org/bugzilla/show_bug.cgi?id=63968
Bug ID: 63968
Summary: ExpiresFilter: invalid cast
Product: Tomcat 8
Version: 8.5.49
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ----
The getExpirationDate() Method of the ExpiresFilter throws a ClassCastException
when the following conditions hold:
1. the request is ServletRequestWrapper
2. an inner request implements the interface
org.apache.catalina.servlet4preview.http.HttpServletRequest
Then the method will throw a ClassCastException in line 1296 of
org.apache.catalina.filters.ExpiresFilter.
Log Message observed:
Our application uses a custom implementation of a ServletRequestWrapper. The
ClassCastException logs that our custom implementation cannot be cast to
org.apache.catalina.servlet4preview.http.HttpServletRequest
Root Cause
==========
The root cause is that if-conditon in line 1295 checks that innerRequest is an
instance of servlet4preview.http.HttpServletRequest, yet in line 1296 the
request (rather than the innerRequest) is casted.
Out Tomcat Settings:
====================
We use Tomcat 8.5.49 with Connector-Protocol
org.apache.coyote.http11.Http11NioProtocol.
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