“Why is the sleigh autopilot slower than a reindeer in quicksand? JINGLESTACK is down, and the temp directory is 800 terabytes!”
Blitzen spins around in his chair, looking guilty. “It’s… fine! Just a minor bug in my Rust code.”
Bernard, the lead elf, cuts in, holding a clipboard. “A bug? Every file in the temp directory is creating three more when dropped. It’s a recursive explosion!”
Santa’s eyes narrow at Blitzen. “Recursive explosion? You’ve turned my servers into a snowball fight gone wrong! Fix it now, or I’ll make you clean every one of those files manually!”
Blitzen gulps, this is not his first time making Santa angry, cracking his knuckles. “On it! Uh, any chance we can blame the interns?”
Santa points a candy cane at him. “One more excuse, and you’re off sleigh duty for good!”
The previous code Blitzen has written was supposed to create temporary files, but they were permanent.
You need to write a struct TempFile that is temporary and it will delete itself when out of scope.
The TempFile struct should have the following fields:
file_path - a PathBuf that represents the path of the file.file - a File that represents the file.The TempFile struct should have the following methods:
new - a method that creates a file in the /tmp directory with a random name.write - a method that writes bytes &[u8] to the file.read_to_string - a method that reads the file and returns a String.If you’re unsure where to start, take a look at these tips:
Use std::env::temp_dir() to get the temporary directory.
Use std::fs::File to create an empty file. e.g. File::create(&file_path).
To open an already created file, use OpenOptions::new() and open(). e.g.
For reading:
use std::fs::OpenOptions;
pub fn read_to_string(&self) -> Result<String, std::io::Error> {
let mut file = OpenOptions::new().read(true).open(&self.file_path)?;
let mut buffer = String::new();
file.read_to_string(&mut buffer)?;
Ok(buffer)
}For writing, you can use OpenOptions::new().write(true).open(&self.file_path)?.