Christian Næser Lindequist created TAP5-2362:
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Summary: Client and server side validation using regular
expressions is inconsistent
Key: TAP5-2362
URL: https://issues.apache.org/jira/browse/TAP5-2362
Project: Tapestry 5
Issue Type: Bug
Components: tapestry-core
Affects Versions: 5.4
Reporter: Christian Næser Lindequist
Priority: Critical
Client and server side validation using regular expressions is inconsistent: On
the client side RegExp.test is used, which returns true if the pattern is found
anywhere in the string, while on the server side Matcher.matches is used, which
only returns true if the entire string matches the pattern. This leads to
situations where the client side validation may succeed and then fail on the
server side.
Proposed solutions:
# In the Regexp validator, replace matcher.matches() with matcher.find() to
match the current behavior of client side validation, or
# Make sure that client side validation also matches the entire string
Option 1 may have more repercussions than option 2, because using
Matcher.find() may cause strings that previously failed validation to succeed
validation, unless the regex was already on the form "^pattern$".
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