Affects Version/s: 1.5.1
Fix Version/s: None
I was trying to check how closely the UrlValidator implements the URL grammar as described by the RFC 1738 (https://www.ietf.org/rfc/rfc1738.txt). I fuzzed the UrlValidator with GramTest, a grammar based test case generation tool (https://github.com/codelion/gramtest).
I found that in the latest version 1.5.1, the UrlValidator fails to validate the following strings:
These two strings may seem a bit strange, but I verified manually that they are allowed by the grammar given in the RFC (see also https://www.w3.org/Addressing/URL/5_BNF.html).
Furthermore, it is possible to create the following URLs in Java without throwing a MalformedUrlException:
however, the UrlValidator returns false for these strings: