Why does this URL cause a bad request on my server?

Question

I have a URL which ends with a %. Like: /view/this-is-100%25. Is it not allowed to have % at the end of a URL? If it's not allowed how can I do it in another way and if it's allowed, why does it cause a bad request?

Thanks.

update: exact error:

Bad Request
Your browser sent a request that this server could not understand.

Answer 1

I just solved this problem by replacing % with percent, because this was only the case in one of my URLs. For a better solution see this link Sam Rad provided my the first comment on my post: Apache: %25 in url (400 Bad Request)

Answer 2

"%" is used in URLs as a prefix for an ASCII (?) UTF-8(?) code. For example a "space" (ASCII 32 or hex 0x20) can be substituted as "%20". The "%" prefix is followed by two hex digits. The web server should take the "%20" and convert it to a space.

When you have a "%" at the end of a URL, you do not have two hex digits following the "%", so the substitution cannot be done, and the URL is in-fact malformed. It is actually a bad URL.

This is why the server doesn't like it.