server: Remove SpaRouter and implement similar

In order to serve several single page applications reimplement the
`SpaRouter` without a fallback.

Cargo.lock

@@ -127,25 +127,6 @@ dependencies = [
  "tower-service",
 ]
 
-[[package]]
-name = "axum-extra"
-version = "0.3.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "69034b3b0fd97923eee2ce8a47540edb21e07f48f87f67d44bb4271cec622bdb"
-dependencies = [
- "axum",
- "bytes",
- "futures-util",
- "http",
- "mime",
- "pin-project-lite",
- "tokio",
- "tower",
- "tower-http",
- "tower-layer",
- "tower-service",
-]
-
 [[package]]
 name = "base64"
 version = "0.13.0"
@@ -596,9 +577,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.132"
+version = "0.2.133"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8371e4e5341c3a96db127eb2465ac681ced4c433e01dd0e938adbef26ba93ba5"
+checksum = "c0f80d65747a3e43d1596c7c5492d95d5edddaabd45a7fcdb02b95f644164966"
 
 [[package]]
 name = "lock_api"
@@ -616,7 +597,6 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "axum",
- "axum-extra",
  "clap",
  "log",
  "tokio",
@@ -945,9 +925,9 @@ checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
 
 [[package]]
 name = "syn"
-version = "1.0.99"
+version = "1.0.100"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "58dbef6ec655055e20b86b15a8cc6d439cca19b667537ac6a1369572d151ab13"
+checksum = "52205623b1b0f064a4e71182c3b18ae902267282930c6d5462c91b859668426e"
 dependencies = [
  "proc-macro2",
  "quote",

lockwatch/Cargo.toml

@@ -13,7 +13,6 @@ categories = ["web-programming::http-server"]
 anyhow = "1"
 log = "0.4"
 axum = "0.5"
-axum-extra = { version = "0.3", features = ["spa"] }
 tokio = { version = "1.0", features = ["full"] }
 tracing-subscriber = "0.3"
 tower = "0.4"

lockwatch/src/main.rs

@@ -1,14 +1,22 @@
 use anyhow::Result;
-use axum::Router;
-use axum_extra::routing::SpaRouter;
+use axum::{
+    http::StatusCode,
+    response::IntoResponse,
+    routing::get_service,
+    Router,
+};
 use clap::{ArgAction, Parser};
-use log::info;
+use log::{error, info};
 use std::{
-    env,
+    env, io,
     net::{IpAddr, SocketAddr},
+    path::PathBuf,
 };
 use tower::ServiceBuilder;
-use tower_http::trace::TraceLayer;
+use tower_http::{
+    services::{ServeDir, ServeFile},
+    trace::TraceLayer,
+};
 
 #[derive(Parser)]
 #[clap(about, author, version)]
@@ -27,6 +35,12 @@ struct Cli {
     verbosity: u8,
 }
 
+#[allow(clippy::unused_async)]
+async fn file_error(err: io::Error) -> impl IntoResponse {
+    error!("could not read from file: {}", err);
+    (StatusCode::INTERNAL_SERVER_ERROR, "Something went wrong...")
+}
+
 #[tokio::main]
 async fn main() -> Result<()> {
     let cli = Cli::parse();
@@ -38,7 +52,17 @@ async fn main() -> Result<()> {
     tracing_subscriber::fmt::init();
 
     let app = Router::new()
-        .merge(SpaRouter::new("/client", cli.static_dir))
+        .nest(
+            "/client",
+            get_service(ServeDir::new(&cli.static_dir)).handle_error(file_error),
+        )
+        .route(
+            "/",
+            get_service(ServeFile::new(
+                &PathBuf::from(&cli.static_dir).join("index.html"),
+            ))
+            .handle_error(file_error),
+        )
         .layer(ServiceBuilder::new().layer(TraceLayer::new_for_http()));
 
     let addr = SocketAddr::from((cli.address, cli.port));