send a message to a tcp server in rust

To send a message to a TCP server in Rust, you'll need to create a TCP socket and send your message over that socket. Here is some sample code that creates a TCP socket and sends a message to a server:

main.rs
use std::net::{TcpStream};

fn main() -> std::io::Result<()> {
    let mut stream = TcpStream::connect("127.0.0.1:3000")?;

    let message = "Hello, TCP Server!";
    stream.write(message.as_bytes())?;

    Ok(())
}
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In this code, we first create a TCP socket using the TcpStream::connect function. We pass in the IP address and port number of the server we want to connect to. If the connection is successful, we can then send a message to the server by writing our message to the TCP stream using the write method.

Note that this is a basic example and there are many possible variations depending on your specific needs. For example, you may want to handle errors more gracefully or set timeouts for your connection.