100 lines
3.1 KiB
Rust
100 lines
3.1 KiB
Rust
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use std::io;
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use std::net::SocketAddrV4;
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use tokio::net::{TcpListener, TcpStream};
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use tokio::io::{AsyncReadExt, AsyncWriteExt};
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use tauri::{AppHandle, Manager};
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mod errors;
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use errors::RequestError;
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pub async fn serve(addr: SocketAddrV4, app_handle: AppHandle) -> io::Result<()> {
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let listener = TcpListener::bind(&addr).await?;
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println!("Listening on {addr}");
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loop {
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let new_handle = app_handle.app_handle();
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match listener.accept().await {
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Ok((stream, _)) => {
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tokio::spawn(async {
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if let Err(e) = handle(stream, new_handle).await {
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eprintln!("{e}");
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}
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});
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},
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Err(e) => {
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println!("Error accepting connection: {e}");
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}
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}
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}
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}
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// it doesn't really return a String, we just need to placate the compiler
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async fn stall(stream: &mut TcpStream) -> Result<String, tokio::io::Error> {
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let delay = std::time::Duration::from_secs(1);
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loop {
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tokio::time::sleep(delay).await;
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stream.write(b"x").await?;
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}
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}
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async fn handle(mut stream: TcpStream, app_handle: AppHandle) -> Result<(), RequestError> {
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let mut buf = [0; 8192]; // it's what tokio's BufReader uses
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let mut n = 0;
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loop {
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n += stream.read(&mut buf[n..]).await?;
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if &buf[(n - 4)..n] == b"\r\n\r\n" {break;}
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if n == buf.len() {return Err(RequestError::RequestTooLarge);}
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}
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println!("{}", std::str::from_utf8(&buf).unwrap());
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stream.write(b"HTTP/1.0 200 OK\r\n").await?;
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stream.write(b"Content-Type: application/json\r\n").await?;
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stream.write(b"X-Creddy-delaying-tactic: ").await?;
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let creds = tokio::select!{
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r = stall(&mut stream) => r?, // this will never return Ok, just Err if it can't write to the stream
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c = get_creds(&app_handle) => c?,
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};
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stream.write(b"\r\nContent-Length: ").await?;
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stream.write(creds.as_bytes().len().to_string().as_bytes()).await?;
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stream.write(b"\r\n\r\n").await?;
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stream.write(creds.as_bytes()).await?;
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stream.write(b"\r\n\r\n").await?;
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Ok(())
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}
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use tokio::io::{stdin, stdout, BufReader, AsyncBufReadExt};
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use crate::storage;
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use tokio::sync::oneshot;
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async fn get_creds(app_handle: &AppHandle) -> io::Result<String> {
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app_handle.emit_all("credentials-request", ()).unwrap();
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// let mut out = stdout();
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// out.write_all(b"Enter passphrase: ").await?;
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// out.flush().await?;
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let (tx, rx) = oneshot::channel();
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app_handle.once_global("passphrase-entered", |event| {
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match event.payload() {
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Some(p) => {tx.send(p.to_string());}
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None => {tx.send("".to_string());} // will fail decryption, we just need to unblock the outer function
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}
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});
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// Error is only returned if the rx is closed/dropped before receiving, which should never happen
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let passphrase = rx.await.unwrap();
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// let mut passphrase = String::new();
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// let mut reader = BufReader::new(stdin());
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// reader.read_line(&mut passphrase).await?;
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Ok(storage::load(&passphrase.trim()))
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}
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