7. Rewrite the serveFile() method such that it imposes a maximum file size limit. If a user attempts to download a file that is larger than the maximum allowed size, write a log entry to a file called error_log and return a 403 Forbidden HTTP response code.

a. What happens if an attacker tries to download /dev/random after you have made your modification?

b. What might be some alternative ways in which to implement the maximum file size limit?

c. Implement multithreading and a mechanism that allows a maximum number of concurrent downloads for a particular IP address.