feat: catch panics; more info on the error page (#35)

Cargo.toml

@@ -23,6 +23,7 @@ askama = "0.12.1"
 async-stream = "0.3.5"
 async-trait = "0.1.80"
 axum = "0.7.5"
+backtrace = "0.3.74"
 bytes = "1.7.1"
 cargo_toml = "0.20.4"
 chrono = { version = "0.4.38", features = ["serde"] }
@@ -40,6 +41,7 @@ flareon_macros = { path = "flareon-macros" }
 form_urlencoded = "1.2.1"
 futures = "0.3.30"
 futures-core = "0.3.30"
+futures-util = "0.3.30"
 glob = "0.3.1"
 http = "1.1.0"
 http-body = "1.0.1"

flareon/Cargo.toml

@@ -9,13 +9,15 @@ description = "Modern web framework focused on speed and ease of use."
 askama.workspace = true
 async-trait.workspace = true
 axum.workspace = true
+backtrace.workspace = true
 bytes.workspace = true
 chrono.workspace = true
 derive_builder.workspace = true
 derive_more.workspace = true
 flareon_macros.workspace = true
 form_urlencoded.workspace = true
 futures-core.workspace = true
+futures-util.workspace = true
 http.workspace = true
 http-body.workspace = true
 http-body-util.workspace = true

flareon/src/config.rs

@@ -0,0 +1,16 @@
+/// Debug mode flag
+///
+/// This enables some expensive operations that are useful for debugging, such
+/// as logging additional information, and collecting some extra diagnostics
+/// for generating error pages. This hurts the performance, so it should be
+/// disabled for production.
+///
+/// This is `true` when the application is compiled in debug mode, and `false`
+/// when it is compiled in release mode.
+pub(crate) const DEBUG_MODE: bool = cfg!(debug_assertions);
+
+/// Whether to display a nice, verbose error page when an error, panic, or
+/// 404 "Not Found" occurs.
+pub(crate) const DISPLAY_ERROR_PAGE: bool = DEBUG_MODE;
+
+pub(crate) const REGISTER_PANIC_HOOK: bool = true;