Upgrade to Axum 0.7 and Hyper 1.0 (Breaking change: disabled ngrok tunneling). (#1959)

- Axum upgraded to hyper 1.0 and most of the ecosystem switched so it's
our time now
- [ngrok-rust](https://github.com/ngrok/ngrok-rust/pull/137/files)
hasn't yet, and hasn't for several months now, so let's disabled the
feature for the time being.


# What does this PR do?

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Fixes # (issue)


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docs/source/conceptual/guidance.md

@@ -2,7 +2,8 @@
 
 ## What is Guidance?
 
-Guidance is a feature that allows users to constrain the generation of a large language model with a specified grammar. This feature is particularly useful when you want to generate text that follows a specific structure or uses a specific set of words or produce output in a specific format. A prominent example is JSON grammar, where the model is forced to output valid JSON.  
+
+Guidance is a feature that allows users to constrain the generation of a large language model with a specified grammar. This feature is particularly useful when you want to generate text that follows a specific structure or uses a specific set of words or produce output in a specific format. A prominent example is JSON grammar, where the model is forced to output valid JSON.
 
 ## How is it used?
 

router/Cargo.toml

@@ -16,8 +16,8 @@ path = "src/main.rs"
 
 [dependencies]
 async-stream = "0.3.5"
-axum = { version = "0.6.20", features = ["json"] }
-axum-tracing-opentelemetry = "0.14.1"
+axum = { version = "0.7", features = ["json"] }
+axum-tracing-opentelemetry = "0.16"
 text-generation-client = { path = "client" }
 clap = { version = "4.4.5", features = ["derive", "env"] }
 futures = "0.3.28"
@@ -36,12 +36,12 @@ thiserror = "1.0.48"
 tokenizers = { workspace = true}
 tokio = { version = "1.32.0", features = ["rt", "rt-multi-thread", "parking_lot", "signal", "sync"] }
 tokio-stream = "0.1.14"
-tower-http = { version = "0.4.4", features = ["cors"] }
+tower-http = { version = "0.5.1", features = ["cors"] }
 tracing = "0.1.37"
 tracing-opentelemetry = "0.21.0"
 tracing-subscriber = { version = "0.3.17", features = ["json", "env-filter"] }
-utoipa = { version = "3.5.0", features = ["axum_extras"] }
-utoipa-swagger-ui = { version = "3.1.5", features = ["axum"] }
+utoipa = { version = "4.2.0", features = ["axum_extras"] }
+utoipa-swagger-ui = { version = "6.0.0", features = ["axum"] }
 ngrok = { version = "0.13.1", features = ["axum"], optional = true }
 init-tracing-opentelemetry = { version = "0.14.1", features = ["opentelemetry-otlp"] }
 minijinja = { git = "https://github.com/mitsuhiko/minijinja.git", rev = "5cd4efb" }

router/src/server.rs

@@ -1392,8 +1392,8 @@ pub async fn run(
     addr: SocketAddr,
     allow_origin: Option<AllowOrigin>,
     ngrok: bool,
-    ngrok_authtoken: Option<String>,
-    ngrok_edge: Option<String>,
+    _ngrok_authtoken: Option<String>,
+    _ngrok_edge: Option<String>,
     tokenizer_config: HubTokenizerConfig,
     processor_config: HubProcessorConfig,
     messages_api_enabled: bool,
@@ -1666,46 +1666,9 @@ pub async fn run(
     if ngrok {
         #[cfg(feature = "ngrok")]
         {
-            use ngrok::config::TunnelBuilder;
-
-            let _ = addr;
-
-            let authtoken =
-                ngrok_authtoken.expect("`ngrok-authtoken` must be set when using ngrok tunneling");
-
-            let edge = ngrok_edge.expect("`ngrok-edge` must be set when using ngrok tunneling");
-
-            let tunnel = ngrok::Session::builder()
-                .authtoken(authtoken)
-                .connect()
-                .await
-                .unwrap()
-                .labeled_tunnel()
-                .label("edge", edge);
-
-            let listener = tunnel.listen().await.unwrap();
-
-            // Run prom metrics and health locally too
-            tokio::spawn(
-                axum::Server::bind(&addr)
-                    .serve(
-                        Router::new()
-                            .route("/health", get(health))
-                            .route("/metrics", get(metrics))
-                            .layer(Extension(health_ext))
-                            .layer(Extension(prom_handle))
-                            .into_make_service(),
-                    )
-                    //Wait until all requests are finished to shut down
-                    .with_graceful_shutdown(shutdown_signal()),
-            );
+            panic!("ngrok feature is not functional with axum=0.7 and hyper=1, waiting on https://github.com/ngrok/ngrok-rust/pull/137/files to re-enable.");
 
             // Run server
-            axum::Server::builder(listener)
-                .serve(app.into_make_service())
-                //Wait until all requests are finished to shut down
-                .with_graceful_shutdown(shutdown_signal())
-                .await?;
         }
         #[cfg(not(feature = "ngrok"))]
         {
@@ -1718,9 +1681,9 @@ pub async fn run(
         }
     } else {
         // Run server
-        axum::Server::bind(&addr)
-            .serve(app.into_make_service())
-            // Wait until all requests are finished to shut down
+
+        let listener = tokio::net::TcpListener::bind(&addr).await.unwrap();
+        axum::serve(listener, app)
             .with_graceful_shutdown(shutdown_signal())
             .await?;
     }