Snippet of web server code in Rust

snippet.rs

use std::io::EndOfFile;
use std::io::io_error;

// ...

fn respond_with_static_file(stream: Option<std::io::net::tcp::TcpStream>, path: &Path) {
    let mut stream = stream;

    let sz = 16384;
    let result = io::result(|| File::open(path));
    
    match result {
        Ok(fopt) => {            
            let mut file = fopt.unwrap();
            let mut keep_reading = true;
            io_error::cond.trap(|e| {
                keep_reading = false;
                if e.kind != EndOfFile {
                    println!("WARN: Error while reading file: {:s} - {:?}", path.display().to_str(), e);
                }
            }).inside(|| {
                stream.write(HTTP_OK.as_bytes());

                while keep_reading {
                    let buf = file.read_bytes(sz);
                    stream.write(buf);  // errors from here will also be caught by above trap hdlr
                }
            });
        }
        Err(ioerror)  => println!("WARN: {:?}", ioerror)
    }
}