WebUiRouter for SPA

server/src/main/java/com/usatiuk/dhfs/webui/WebUiRouter.java

@@ -0,0 +1,53 @@
+package com.usatiuk.dhfs.webui;
+
+import io.quarkus.runtime.StartupEvent;
+import io.vertx.core.http.HttpServerRequest;
+import io.vertx.ext.web.Router;
+import io.vertx.ext.web.RoutingContext;
+import jakarta.enterprise.context.ApplicationScoped;
+import jakarta.enterprise.event.Observes;
+import org.eclipse.microprofile.config.inject.ConfigProperty;
+
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Optional;
+
+@ApplicationScoped
+public class WebUiRouter {
+
+    @ConfigProperty(name = "dhfs.webui.root")
+    Optional<String> root;
+
+    void installRoute(@Observes StartupEvent startupEvent, Router router) {
+        root.ifPresent(r -> {
+            router.route()
+                    .path("/webui/*")
+                    .handler(this::handle);
+        });
+    }
+
+    public void handle(RoutingContext event) {
+        var indexHtml = Paths.get(root.orElseThrow(() -> new IllegalStateException("Web ui root not set but handler called")), "index.html").toString();
+
+        HttpServerRequest request = event.request();
+        String requestedPath = Path.of(event.currentRoute().getPath()).relativize(Path.of(event.normalizedPath())).toString();
+
+        if ("/".equals(requestedPath)) {
+            request.response().sendFile(indexHtml);
+            return;
+        }
+
+        Path requested = Paths.get(root.get(), requestedPath);
+        if (!requested.normalize().startsWith(Paths.get(root.get()))) {
+            request.response().setStatusCode(404).end();
+            return;
+        }
+
+        event.vertx().fileSystem().lprops(requested.toString(), exists -> {
+            if (exists.succeeded() && exists.result().isRegularFile())
+                request.response().sendFile(requested.toString());
+            else
+                request.response().sendFile(indexHtml);
+        });
+    }
+}