send a binary message to a tcp server in rust

To send a binary message to a TCP server in Rust, you can use the standard library's TcpStream type. Here's an example:

main.rs
use std::io::prelude::*;
use std::net::TcpStream;

fn main() -> std::io::Result<()> {
    // Connect to the server
    let mut stream = TcpStream::connect("localhost:8080")?;

    // Define the binary message to send
    let message = [0x00, 0x01, 0x02, 0x03];

    // Write the message to the stream
    stream.write_all(&message)?;

    Ok(())
}
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In this example, we first create a TcpStream by calling the connect method and passing in the address of the server we want to connect to. Next, we define the binary message that we want to send as a byte array. Finally, we call the write_all method on the stream and pass in a reference to the message array to write the message to the server.

Note that we've wrapped the main logic in a Result to handle any errors that might occur when setting up the connection or when writing the message.