mirror of
https://github.com/teloxide/teloxide.git
synced 2024-12-22 14:35:36 +01:00
107 lines
3.2 KiB
Rust
107 lines
3.2 KiB
Rust
// The version of Heroku ping-pong-bot, which uses a webhook to receive updates
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// from Telegram, instead of long polling.
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//
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// You will need to configure the buildpack for heroku. We will be using Heroku
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// rust buildpack [1]. Configuration was done by using heroku CLI.
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//
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// If you're creating a new Heroku application, run this:
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//
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// ```
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// heroku create --buildpack emk/rust
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// ```
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//
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// To set buildpack for existing applicaton:
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//
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// ```
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// heroku buildpacks:set emk/rust
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// ```
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//
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// [1] https://github.com/emk/heroku-buildpack-rust
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// TODO: use built-in webhook support
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use teloxide::{
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dispatching::{
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stop_token::AsyncStopToken,
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update_listeners::{self, StatefulListener},
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},
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prelude::*,
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types::Update,
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};
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use std::{convert::Infallible, env, net::SocketAddr};
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use tokio::sync::mpsc;
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use tokio_stream::wrappers::UnboundedReceiverStream;
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use warp::Filter;
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use reqwest::{StatusCode, Url};
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#[tokio::main]
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async fn main() {
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pretty_env_logger::init();
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log::info!("Starting Heroku ping-pong bot...");
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let bot = Bot::from_env().auto_send();
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teloxide::repl_with_listener(
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bot.clone(),
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|msg: Message, bot: AutoSend<Bot>| async move {
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bot.send_message(msg.chat.id, "pong").await?;
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respond(())
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},
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webhook(bot).await,
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)
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.await;
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}
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async fn handle_rejection(error: warp::Rejection) -> Result<impl warp::Reply, Infallible> {
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log::error!("Cannot process the request due to: {:?}", error);
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Ok(StatusCode::INTERNAL_SERVER_ERROR)
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}
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pub async fn webhook(bot: AutoSend<Bot>) -> impl update_listeners::UpdateListener<Infallible> {
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// Heroku auto defines a port value
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let teloxide_token = env::var("TELOXIDE_TOKEN").expect("TELOXIDE_TOKEN env variable missing");
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let port: u16 = env::var("PORT")
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.expect("PORT env variable missing")
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.parse()
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.expect("PORT value to be integer");
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// Heroku host example .: "heroku-ping-pong-bot.herokuapp.com"
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let host = env::var("HOST").expect("have HOST env variable");
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let path = format!("bot{teloxide_token}");
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let url = Url::parse(&format!("https://{host}/{path}")).unwrap();
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bot.set_webhook(url).await.expect("Cannot setup a webhook");
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let (tx, rx) = mpsc::unbounded_channel();
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let server = warp::post()
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.and(warp::path(path))
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.and(warp::body::json())
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.map(move |update: Update| {
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tx.send(Ok(update)).expect("Cannot send an incoming update from the webhook");
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StatusCode::OK
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})
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.recover(handle_rejection);
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let (stop_token, stop_flag) = AsyncStopToken::new_pair();
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let addr = format!("0.0.0.0:{port}").parse::<SocketAddr>().unwrap();
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let server = warp::serve(server);
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let (_addr, fut) = server.bind_with_graceful_shutdown(addr, stop_flag);
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// You might want to use serve.key_path/serve.cert_path methods here to
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// setup a self-signed TLS certificate.
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tokio::spawn(fut);
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let stream = UnboundedReceiverStream::new(rx);
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fn streamf<S, T>(state: &mut (S, T)) -> &mut S {
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&mut state.0
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}
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StatefulListener::new((stream, stop_token), streamf, |state: &mut (_, AsyncStopToken)| {
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state.1.clone()
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})
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}
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