teloxide/examples/ngrok_ping_pong.rs

80 lines
2.4 KiB
Rust

// The version of ngrok ping-pong-bot, which uses a webhook to receive updates
// from Telegram, instead of long polling.
use teloxide::{
dispatching::{
stop_token::AsyncStopToken,
update_listeners::{self, StatefulListener},
},
prelude2::*,
types::Update,
};
use std::{convert::Infallible, net::SocketAddr};
use tokio::sync::mpsc;
use tokio_stream::wrappers::UnboundedReceiverStream;
use warp::Filter;
use reqwest::{StatusCode, Url};
#[tokio::main]
async fn main() {
pretty_env_logger::init();
log::info!("Starting heroku_ping_pong_bot...");
let bot = Bot::from_env().auto_send();
teloxide::repls2::repl_with_listener(
bot.clone(),
|msg: Message, bot: AutoSend<Bot>| async move {
bot.send_message(msg.chat.id, "pong").await?;
respond(())
},
webhook(bot).await,
)
.await;
}
async fn handle_rejection(error: warp::Rejection) -> Result<impl warp::Reply, Infallible> {
log::error!("Cannot process the request due to: {:?}", error);
Ok(StatusCode::INTERNAL_SERVER_ERROR)
}
pub async fn webhook(bot: AutoSend<Bot>) -> impl update_listeners::UpdateListener<Infallible> {
let url = Url::parse("Your HTTPS ngrok URL here. Get it by `ngrok http 80`").unwrap();
// You might want to specify a self-signed certificate via .certificate
// method on SetWebhook.
bot.set_webhook(url).await.expect("Cannot setup a webhook");
let (tx, rx) = mpsc::unbounded_channel();
let server = warp::post()
.and(warp::body::json())
.map(move |update: Update| {
tx.send(Ok(update)).expect("Cannot send an incoming update from the webhook");
StatusCode::OK
})
.recover(handle_rejection);
let (stop_token, stop_flag) = AsyncStopToken::new_pair();
let addr = "127.0.0.1:80".parse::<SocketAddr>().unwrap();
let server = warp::serve(server);
let (_addr, fut) = server.bind_with_graceful_shutdown(addr, stop_flag);
// You might want to use serve.key_path/serve.cert_path methods here to
// setup a self-signed TLS certificate.
tokio::spawn(fut);
let stream = UnboundedReceiverStream::new(rx);
fn streamf<S, T>(state: &mut (S, T)) -> &mut S {
&mut state.0
}
StatefulListener::new((stream, stop_token), streamf, |state: &mut (_, AsyncStopToken)| {
state.1.clone()
})
}