Archives / 2011 / April
  • Use of special characters like '%' ‘.’ and ‘:’ in an IIS URL

    There are multiple times that we get questions about % and other special characters in the URL and what the expected behavior is in IIS. The behavior in IIS is very deterministic when it comes to these special characters, but to explain the behavior we will need to delve a little bit into both URL canonicalization and the different stages of request processing in IIS.