WriteMonitor

监控写入到 tokio::io::AsyncWrite
或 futures::io::AsyncWrite 或 std::io::Write

lib.rs:

WriteMonitor 将包装一个写入器，并监控写入到其中的字节数。这对于显示写入进度非常有用

示例

use write_monitor::WriteMonitor;
use std::io::Write;
let mut buf = std::fs::File::create("somefile").unwrap();
let mut wm = WriteMonitor::new(buf);
let big_data = std::fs::read("Cargo.toml").unwrap();
let big_data_len = big_data.len();
let monitor = wm.monitor();
std::thread::spawn(move || {
    wm.write_all(&big_data).unwrap();
});
let mut last_written = 0;
while monitor.bytes_written() < big_data_len as u64 {
   let written = monitor.bytes_written();
   if written != last_written {
   println!("{} bytes written", written);
   last_written = written;
   }
 std::thread::sleep(std::time::Duration::from_millis(100));
}