https://bz.apache.org/bugzilla/show_bug.cgi?id=63608
Bug ID: 63608
Summary: Negative pattern match in rewrite rule is not as
documented
Product: Tomcat 8
Version: 8.5.x-trunk
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ----
The mention of using "NOT character ('!')" in rule patterns as negative match
no longer matches implementation:
https://tomcat.apache.org/tomcat-8.5-doc/rewrite.html
In the rules, the NOT character ('!') is also available as a possible
pattern prefix. This enables you to negate a pattern; to say, for instance:
``if the current URL does NOT match this pattern''. This can be used for
exceptional cases, where it is easier to match the negative pattern, or as a
last default rule.
The current implementation uses java.util.regex, which does not support a
simple ! prefix as a negative match regex:
https://docs.oracle.com/javase/8/docs/api/index.html?java/util/regex/Pattern.html
Instead, you need to use zero-width lookahead like this (to match any URL but
/portal/api/.*)
^(?!/portal/api/.*).*$
This inaccurate documentation exist in all versions, at least since 8.0.x. For
backward compatibility to the above documentation, RewriteRule needs the
`positive` variable and logic found in the RewriteCond class.
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