bincode.rs

use serde::{Deserialize, Serialize};
use std::fmt;
use std::io::Cursor;

#[derive(Serialize, Deserialize)]
struct Entry {
    key: Vec<u8>,
    value: Vec<u8>,
}

impl fmt::Debug for Entry {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        f.debug_struct("Entry")
            .field("key", &String::from_utf8_lossy(&self.key))
            .field("value", &String::from_utf8_lossy(&self.value))
            .finish()
    }
}

fn get_entry(index: usize) -> Entry {
    let key = format!("foo{}", index);
    let value = format!("bar{}", index);
    Entry {
        key: key.as_bytes().to_vec(),
        value: value.as_bytes().to_vec(),
    }
}

fn main() {
    let mut buf = Cursor::new(Vec::new());

    for i in 0..10 {
        let entry = get_entry(i);
        bincode::serialize_into(&mut buf, &entry).unwrap();
    }

    buf.set_position(0);
    while let Ok(decoded) = bincode::deserialize_from::<_, Entry>(&mut buf) {
        println!("{:?}", decoded)
    }
}