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"0.1.0" +edition = "2024" + +[dependencies] +tokio = { version = "1", features= ["full"] } +anyhow = "1" diff --git a/problem04/src/main.rs b/problem04/src/main.rs new file mode 100644 index 0000000..1c24b9b --- /dev/null +++ b/problem04/src/main.rs @@ -0,0 +1,46 @@ +use std::collections::HashMap; + +use anyhow::Result; + +#[tokio::main] +async fn main() -> Result<()> { + let socket = tokio::net::UdpSocket::bind("0.0.0.0:10000").await?; + + let mut read_buffer = vec![0; 1_000]; + let mut write_buffer = vec![0; 1_000]; + + let mut db = HashMap::new(); + + loop { + let (len, addr) = socket.recv_from(&mut read_buffer).await?; + + let message = String::from_utf8(read_buffer[..len].to_vec())?; + + if message.trim() == "version" { + write_buffer = "version=Ken's Key-Value Store 1.0".to_string().into_bytes(); + socket.send_to(&write_buffer, addr).await?; + + continue; + } + + match message.chars().position(|c| c == '=') { + Some(position) => { + let (key, value) = message.split_at(position); + + let value = value.chars().skip(1).collect(); + + db.insert(key.to_string(), value); + continue; + } + None => { + let reply = format!( + "{}={}", + message, + db.get(&message).unwrap_or(&"".to_string()) + ); + write_buffer = reply.into_bytes(); + socket.send_to(&write_buffer, addr).await?; + } + } + } +}