What are some examples of using Tokio in Rust?

What are some examples of using Tokio in Rust?

Tokio is an asynchronous runtime for Rust. Here are a few examples:

1. Basic TCP Server: Create a simple TCP server that handles multiple connections.
2. HTTP Client: Use Tokio to make asynchronous HTTP requests.
3. File I/O: Perform non-blocking file operations. Would you like to see code snippets for any of these?

Yes, please show me the TCP server example.

Here's a basic TCP server example using Tokio:

use tokio::net::{TcpListener, TcpStream};
use tokio::prelude::*;

#[tokio::main]
async fn main() -> std::io::Result<()> {
    let listener = TcpListener::bind("127.0.0.1:8080").await?;
    loop {
        let (socket, _) = listener.accept().await?;
        tokio::spawn(async move {
            // Handle the socket
        });
    }
}

This server listens on port 8080 and spawns a new task for each connection. Would you like to know more about handling connections?

Yes, how do I handle incoming connections?

To handle incoming connections, you can read from and write to the socket. Here's an example:

use tokio::io::{AsyncReadExt, AsyncWriteExt};

async fn handle_connection(mut socket: TcpStream) {
    let mut buffer = [0; 1024];
    let n = socket.read(&mut buffer).await.unwrap();
    socket.write_all(&buffer[0..n]).await.unwrap();
}

This function reads data from the socket and echoes it back. Would you like to explore more advanced features?