Update bots manager

Cargo.lock

@@ -225,7 +225,10 @@ dependencies = [
  "teloxide",
  "textwrap",
  "tokio",
+ "tokio-stream",
  "tokio-util",
+ "tower",
+ "tower-http 0.4.3",
  "url",
 ]
 
@@ -1986,7 +1989,7 @@ dependencies = [
  "tokio-stream",
  "tokio-util",
  "tower",
- "tower-http",
+ "tower-http 0.3.5",
  "url",
 ]
 
@@ -2242,6 +2245,24 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "tower-http"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "55ae70283aba8d2a8b411c695c437fe25b8b5e44e23e780662002fc72fb47a82"
+dependencies = [
+ "bitflags 2.3.3",
+ "bytes",
+ "futures-core",
+ "futures-util",
+ "http",
+ "http-body",
+ "http-range-header",
+ "pin-project-lite",
+ "tower-layer",
+ "tower-service",
+]
+
 [[package]]
 name = "tower-layer"
 version = "0.3.2"

Cargo.toml

@@ -30,3 +30,6 @@ moka = { version = "0.11.1", features = ["future"] }
 axum = "0.6.18"
 smallvec = { version = "1.10.0", features = ["serde"] }
 smartstring = { version = "1.0.1", features = ["serde"] }
+tokio-stream = "0.1.14"
+tower = "0.4.13"
+tower-http = "0.4.3"

src/bots_manager/mod.rs

@@ -1,23 +1,28 @@
 pub mod bot_manager_client;
 
+use axum::extract::State;
+use axum::response::IntoResponse;
+use axum::routing::post;
+use reqwest::StatusCode;
 use smartstring::alias::String as SmartString;
+use teloxide::stop::{mk_stop_token, StopToken, StopFlag};
+use teloxide::update_listeners::{StatefulListener, UpdateListener};
+use tokio::sync::mpsc::{UnboundedSender, self};
+use tokio_stream::wrappers::UnboundedReceiverStream;
+use url::Url;
 
 use std::collections::HashMap;
+use std::convert::Infallible;
 use std::net::SocketAddr;
 use std::sync::atomic::{AtomicBool, Ordering};
-use std::sync::Arc;
+use std::sync::{Arc, RwLock};
 
-use axum::Router;
 use smallvec::SmallVec;
 use teloxide::adaptors::throttle::Limits;
-use teloxide::types::BotCommand;
+use teloxide::types::{BotCommand, UpdateKind};
 use tokio::time::{sleep, Duration};
 
-use teloxide::{
-    dispatching::{update_listeners::webhooks, ShutdownToken},
-    prelude::*,
-};
-use url::Url;
+use teloxide::prelude::*;
 
 use moka::future::Cache;
 
@@ -25,6 +30,15 @@ use self::bot_manager_client::get_bots;
 pub use self::bot_manager_client::{BotCache, BotData};
 use crate::config;
 
+
+type UpdateSender = mpsc::UnboundedSender<Result<Update, std::convert::Infallible>>;
+
+
+fn tuple_first_mut<A, B>(tuple: &mut (A, B)) -> &mut A {
+    &mut tuple.0
+}
+
+
 #[derive(Clone)]
 pub struct AppState {
     pub user_activity_cache: Cache<UserId, ()>,
@@ -32,17 +46,19 @@ pub struct AppState {
     pub chat_donation_notifications_cache: Cache<ChatId, ()>,
 }
 
-pub struct BotsManager {
-    app_state: AppState,
-    next_port: u16,
-    bot_port_map: HashMap<u32, u16>,
-    bot_shutdown_token_map: HashMap<u32, ShutdownToken>,
+
+#[derive(Default, Clone)]
+struct ServerState {
+    routers: Arc<RwLock<HashMap<String, UnboundedSender<Result<Update, std::convert::Infallible>>>>>,
 }
 
-pub enum BotStartResult {
-    Success,
-    SuccessWithRouter(Router),
-    Failed
+pub struct BotsManager {
+    app_state: AppState,
+
+    port: u16,
+    stop_data: (StopToken, StopFlag),
+
+    state: ServerState
 }
 
 impl BotsManager {
@@ -62,35 +78,41 @@ impl BotsManager {
                     .max_capacity(2048)
                     .build(),
             },
-            next_port: 8000,
-            bot_port_map: HashMap::new(),
-            bot_shutdown_token_map: HashMap::new(),
+
+            port: 8000,
+            stop_data: mk_stop_token(),
+
+            state: ServerState {
+                routers: Arc::new(RwLock::new(HashMap::new()))
+            }
         }
     }
 
-    async fn start_bot(&mut self, bot_data: &BotData, is_first_start: bool) -> BotStartResult {
+    fn get_listener(&self) -> (UnboundedSender<Result<Update, std::convert::Infallible>>, impl UpdateListener<Err = Infallible>) {
+        let (tx, rx): (UpdateSender, _) = mpsc::unbounded_channel();
+
+        let stream = UnboundedReceiverStream::new(rx);
+
+        let listener = StatefulListener::new(
+            (stream, self.stop_data.0.clone()),
+            tuple_first_mut,
+            |state: &mut (_, StopToken)| {
+                state.1.clone()
+            },
+        );
+
+        return (tx, listener);
+    }
+
+    async fn start_bot(&mut self, bot_data: &BotData) -> bool {
         let bot = Bot::new(bot_data.token.clone())
             .set_api_url(config::CONFIG.telegram_bot_api.clone())
             .throttle(Limits::default())
             .cache_me();
 
         let token = bot.inner().inner().token();
-        let port = self
-            .bot_port_map
-            .get(&bot_data.id)
-            .unwrap_or_else(|| panic!("Can't get bot port!"));
 
-        let addr = ([0, 0, 0, 0], *port).into();
-
-        let host = format!("{}:{}", &config::CONFIG.webhook_base_url, port);
-        let url = Url::parse(&format!("{host}/{token}"))
-            .unwrap_or_else(|_| panic!("Can't parse webhook url!"));
-
-        log::info!(
-            "Start bot(id={}) port {}",
-            bot_data.id,
-            port
-        );
+        log::info!("Start bot(id={})", bot_data.id);
 
         let (handler, commands) = crate::bots::get_bot_handler();
 
@@ -107,19 +129,19 @@ impl BotsManager {
             .dependencies(dptree::deps![bot_data.cache, self.app_state.clone()])
             .build();
 
-        let shutdown_token = dispatcher.shutdown_token();
-            self.bot_shutdown_token_map
-                .insert(bot_data.id, shutdown_token);
+        let (tx, listener) = self.get_listener();
 
-        if is_first_start {
-            let (listener, router) = match webhooks::axum_to_router(bot.clone(), webhooks::Options::new(addr, url)).await {
-                Ok(v) => (v.0, v.2),
-                Err(err) => {
-                    log::warn!("{}", err);
+        let mut routers = self.state.routers.write().unwrap();
+        routers.insert(token.to_string(), tx);
 
-                    return BotStartResult::Failed;
-                },
-            };
+        let host = format!("{}:{}", &config::CONFIG.webhook_base_url, self.port);
+        let url = Url::parse(&format!("{host}/{token}"))
+            .unwrap_or_else(|_| panic!("Can't parse webhook url!"));
+
+        match bot.set_webhook(url.clone()).await {
+            Ok(_) => (),
+            Err(_) => return false,
+        }
 
         tokio::spawn(async move {
             dispatcher
@@ -130,114 +152,141 @@ impl BotsManager {
                 .await;
         });
 
-            BotStartResult::SuccessWithRouter(router)
-        } else {
-            let listener = match webhooks::axum(bot.clone(), webhooks::Options::new(addr, url)).await {
-                Ok(v) => v,
-                Err(err) => {
-                    log::warn!("{}", err);
-
-                    return BotStartResult::Failed;
-                },
-            };
-
-            tokio::spawn(async move {
-                dispatcher
-                    .dispatch_with_listener(
-                        listener,
-                        LoggingErrorHandler::with_custom_text("An error from the update listener"),
-                    )
-                    .await;
-            });
-
-            BotStartResult::Success
-        }
+        return true;
     }
 
-    async fn sd_token(token: &ShutdownToken) {
-        for _ in 1..10 {
-            if let Ok(v) = token.clone().shutdown() {
-                return v.await;
-            }
-
-            sleep(Duration::from_millis(100)).await;
-        }
-    }
-
-    async fn update_data(&mut self, bots_data: Vec<BotData>, is_first_start: bool) -> Vec<Router> {
-        let mut routers: Vec<Router> = vec![];
-
-        for bot_data in bots_data.iter() {
-            if let std::collections::hash_map::Entry::Vacant(e) =
-                self.bot_port_map.entry(bot_data.id)
-            {
-                e.insert(self.next_port);
-
-                if !is_first_start {
-                    self.next_port += 1;
-                }
-
-                match self.start_bot(bot_data, is_first_start).await {
-                    BotStartResult::Success => (),
-                    BotStartResult::SuccessWithRouter(router) => {
-                        routers.push(router);
-                    },
-                    BotStartResult::Failed => {
-                        self.bot_shutdown_token_map.remove(&bot_data.id);
-                    },
-                }
-            }
-        }
-
-        routers
-    }
-
-    async fn check(&mut self, is_first_start: bool) -> Option<Vec<Router>> {
+    async fn check(&mut self){
         let bots_data = get_bots().await;
 
         match bots_data {
-            Ok(v) => Some(self.update_data(v, is_first_start).await),
-            Err(err) => {
-                log::info!("{:?}", err);
-
-                None
-            }
-        }
-    }
-
-    async fn stop_all(&mut self) {
-        for token in self.bot_shutdown_token_map.values() {
-            BotsManager::sd_token(token).await;
-        }
-    }
-
-    async fn start_axum_server(&mut self) {
-        loop {
-            let routers = match self.check(true).await {
-                Some(v) => v,
-                None => continue,
+            Ok(v) => {
+                for bot_data in v.iter() {
+                    let need_start = {
+                        let routers = self.state.routers.read().unwrap();
+                        !routers.contains_key(&bot_data.token)
                     };
 
-            let mut app = Router::new();
-
-            for router in routers {
-                app = app.merge(router);
+                    if need_start {
+                        self.start_bot(bot_data).await;
+                    }
+                }
+            },
+            Err(err) => {
+                log::info!("{:?}", err);
+            }
+        }
     }
 
-            let addr = SocketAddr::from(([0, 0, 0, 0], self.next_port));
-            self.next_port += 1;
+    // async fn start_axum_server(&mut self) {
+    //     loop {
+    //         let routers = match self.check(true).await {
+    //             Some(v) => v,
+    //             None => continue,
+    //         };
+
+    //         let mut app = Router::new();
+
+    //         for router in routers {
+    //             app = app.merge(router);
+    //         }
+
+    //         let addr = SocketAddr::from(([0, 0, 0, 0], self.next_port));
+    //         self.next_port += 1;
+
+    //         tokio::spawn(async move {
+    //             log::info!("Start webserver...");
+    //             axum::Server::bind(&addr)
+    //                 .serve(app.into_make_service())
+    //                 .await
+    //                 .unwrap();
+    //             log::info!("Webserver shutdown...")
+    //         });
+
+    //         return;
+    //     }
+    // }
+
+    async fn start_axum_server(&mut self) {
+        async fn telegram_request(
+            State(ServerState { routers }): State<ServerState>,
+            // secret_header: XTelegramBotApiSecretToken,
+            input: String,
+        ) -> impl IntoResponse {
+            // // FIXME: use constant time comparison here
+            // if secret_header.0.as_deref() != secret.as_deref().map(str::as_bytes) {
+            //     return StatusCode::UNAUTHORIZED;
+            // }
+
+            let t1 = routers.read().unwrap();
+            let tx = t1.get("t");
+
+            let tx = match tx {
+                Some(tx) => {
+                    tx
+                    // match tx.get() {
+                    //     None => return StatusCode::SERVICE_UNAVAILABLE,
+                    //     // Do not process updates after `.stop()` is called even if the server is still
+                    //     // running (useful for when you need to stop the bot but can't stop the server).
+                    //     // TODO
+                    //     // _ if flag.is_stopped() => {
+                    //     //     tx.close();
+                    //     //     return StatusCode::SERVICE_UNAVAILABLE;
+                    //     // }
+                    //     Some(tx) => tx,
+                    // };
+                },
+                None => return StatusCode::NOT_FOUND,
+            };
+
+            match serde_json::from_str::<Update>(&input) {
+                Ok(mut update) => {
+                    // See HACK comment in
+                    // `teloxide_core::net::request::process_response::{closure#0}`
+                    if let UpdateKind::Error(value) = &mut update.kind {
+                        *value = serde_json::from_str(&input).unwrap_or_default();
+                    }
+
+                    tx.send(Ok(update)).expect("Cannot send an incoming update from the webhook")
+                }
+                Err(error) => {
+                    log::error!(
+                        "Cannot parse an update.\nError: {:?}\nValue: {}\n\
+                         This is a bug in teloxide-core, please open an issue here: \
+                         https://github.com/teloxide/teloxide/issues.",
+                        error,
+                        input
+                    );
+                }
+            };
+
+            StatusCode::OK
+        }
+
+        let stop_flag = self.stop_data.1.clone();
+        let state = self.state.clone();
 
         tokio::spawn(async move {
             log::info!("Start webserver...");
-                axum::Server::bind(&addr)
-                    .serve(app.into_make_service())
-                    .await
-                    .unwrap();
-                log::info!("Webserver shutdown...")
-            });
 
-            return;
-        }
+            let addr = SocketAddr::from(([0, 0, 0, 0], 8000));
+
+            let router = axum::Router::new()
+                .route("/:token/", post(telegram_request))
+                // .layer(TraceLayer::new_for_http())
+                .with_state(state);
+
+            axum::Server::bind(&addr)
+                .serve(router.into_make_service())
+                .with_graceful_shutdown(stop_flag)
+                .await
+                // .map_err(|err| {
+                //     stop_token.stop();
+                //     err
+                // })
+                .expect("Axum server error");
+
+            log::info!("Webserver shutdown...");
+        });
     }
 
     pub async fn start(running: Arc<AtomicBool>) {
@@ -247,13 +296,13 @@ impl BotsManager {
 
         loop {
             if !running.load(Ordering::SeqCst) {
-                manager.stop_all().await;
+                manager.stop_data.0.stop();
                 return;
             }
 
-            sleep(Duration::from_secs(30)).await;
+            manager.check().await;
 
-            manager.check(false).await;
+            sleep(Duration::from_secs(30)).await;
         }
     }
 }

src/main.rs

@@ -21,9 +21,5 @@ async fn main() {
     })
     .expect("Error setting Ctrl-C handler");
 
-    tokio::spawn(async move {
     bots_manager::BotsManager::start(running).await;
-    })
-    .await
-    .unwrap();
 }