Tomcat version:8.0.43 jdk1.8.0_05 Hello,
I've asked a similar question in the past about illegal characters in the http request header (May 15, 2017). Certain users are able to send http requests to my server that contain the space character. This character is obviously not allowed. Tomcat recognizes it and throws an IllegalArgumentException and a http response code 400 is returned to the client. >From my logs: *Error parsing HTTP request header...* *java.lang.IllegalArgumentException: Invalid character found in the request target. The valid characters are defined in RFC 7230 and RFC 3986* Is there any way to validate the url before it reaches tomcat so that I can return a 404 if an invalid character is found in the url? I would just like to avoid exceptions being thrown where possible. Thank you.
