Calculate MD5 of a file in Rustrust/calc-md5-of-fileAn example of using md5 and file to calculate MD5 of a file in stream

1use md5::Context;
2use std::path::Path;
3use std::{fs, io};
4
5pub fn calculate_md5(file_path: &Path) -> io::Result<String> {
6    let file = fs::File::open(file_path)?;
7    let mut context = Context::new();
8    let mut buffer = [0; 4096]; // buffer size: 4KB
9
10    let mut reader = io::BufReader::new(file);
11    loop {
12        let bytes_read = reader.read(&mut buffer)?;
13        if bytes_read == 0 {
14            break;
15        }
16        context.consume(&buffer[..bytes_read]);
17    }
18
19    let result = context.compute();
20    Ok(format!("{:x}", result))
21}