I have a Tomcat server running Java servlets. I'm trying to make a servlet that returns stored files, given their encrypted IDs.
ID: 100
Encrypted ID: +e4/E5cR/aM=
URL-encoded ID: %2Be4%2FE5cR%2FaM%3D
Resulting URL: http://localhost/file/demo/%2Be4%2FE5cR%2FaM%3D
When I try to follow that link, I don't even get into my servlet's code - the server returns this error: Failed to load resource: the server responded with a status of 400 (Bad Request)
What's wrong with this URL that's making Tomcat reject it before reaching my code? I ran it though a URL-encoder, and I don't see any invalid characters in it.