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use async_std::{
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fs,
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io::BufReader,
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net::{TcpListener, TcpStream},
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prelude::*,
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task,
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};
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type Result<T> = std::result::Result<T, Box<dyn std::error::Error + Send + Sync>>;
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pub fn start(addr: &str, root: &str) -> Result<()> {
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let fut = listen(addr, root);
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task::block_on(fut)
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}
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async fn listen(addr: &str, root: &str) -> Result<()> {
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let listener = TcpListener::bind(addr).await?;
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let mut incoming = listener.incoming();
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while let Some(stream) = incoming.next().await {
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let stream = stream?;
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println!("-> Connection from: {}", stream.peer_addr()?);
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let root = root.to_string();
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task::spawn(client_loop(stream, root));
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}
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Ok(())
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}
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async fn client_loop(mut stream: TcpStream, root: String) -> Result<()> {
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let reader = BufReader::new(&stream);
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let mut lines = reader.lines();
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if let Some(Ok(line)) = lines.next().await {
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println!("-> client sent: {:?}", line);
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respond(&mut stream, &line, &root).await?;
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}
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Ok(())
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}
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async fn respond(stream: &mut TcpStream, selector: &str, root: &str) -> Result<()> {
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let mut response = format!("iYou sent: {}\r\n", selector);
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let mut dir = fs::read_dir(root).await?;
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while let Some(Ok(entry)) = dir.next().await {
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response.push_str(&format!(
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"1{}\t/{}\tlocalhost\t7070\r\n",
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entry.file_name().into_string().unwrap(),
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entry.file_name().into_string().unwrap(),
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));
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}
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stream.write_all(response.as_bytes()).await?;
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Ok(())
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}
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