gistfile1.txt

fn main() {

    ...

    loop {
        match handle.read_line(&mut buffer) {
            Ok(bytes_read) => {
                let mut object: Value = serde_json::from_str(&buffer).unwrap();
                
                ...
                
                // Modify the "body" object to include the desired fields
                let msg_type: String = object["body"]["type"].to_string();
                match msg_type.as_str() {
                    "init" => object["body"].as_object_mut().unwrap().insert("type".to_string(), json!("init_ok")),
                    "echo" => object["body"].as_object_mut().unwrap().insert("type".to_string(), json!("echo_ok")),
                     _ => {
                         println!("{}", msg_type.as_str() == "echo");
                         print_type_of(&msg_type);
                         None
                     }
                };
                ...
            }
            Err(error) => {
                eprintln!("Error reading from stdin: {}", error);
                break;
            }
        }
    }
}