fix router

src/main/java/fr/titionfire/ffsaf/FrontendForwardingFilter.java

@@ -0,0 +1,75 @@
+package fr.titionfire.ffsaf;
+
+import io.vertx.core.http.HttpServerRequest;
+import jakarta.annotation.Priority;
+import jakarta.ws.rs.Priorities;
+import jakarta.ws.rs.container.ContainerRequestContext;
+import jakarta.ws.rs.container.ContainerResponseContext;
+import jakarta.ws.rs.container.ContainerResponseFilter;
+import jakarta.ws.rs.container.ResourceInfo;
+import jakarta.ws.rs.core.Context;
+import jakarta.ws.rs.core.MediaType;
+import jakarta.ws.rs.core.UriInfo;
+import jakarta.ws.rs.ext.Provider;
+import org.jboss.logging.Logger;
+
+import java.nio.charset.StandardCharsets;
+import java.util.Objects;
+import java.util.Scanner;
+
+@Provider
+@Priority(Priorities.USER)
+public class FrontendForwardingFilter implements ContainerResponseFilter {
+
+    private static final Logger LOG = Logger.getLogger(FrontendForwardingFilter.class);
+
+    @Context
+    UriInfo info;
+
+    @Context
+    HttpServerRequest request;
+
+    @Context
+    ResourceInfo resourceInfo;
+
+    private static String text = null;
+
+    private static final String API_NAMESPACE_REGEX = "^/(api/.*|api)";
+    private static final String FILENAME_REGEX = "^/.*\\.[^.]+$";
+
+    @Override
+    public void filter(ContainerRequestContext requestContext, ContainerResponseContext responseContext) {
+
+        final String method = requestContext.getMethod();
+        final String path = info.getPath();
+        final String address = request.remoteAddress().toString();
+
+        LOG.infof("Request %s %s from IP %s", method, path, address);
+
+        int status = responseContext.getStatus();
+        if (status != 404 && !(status == 405 && "GET".equals(requestContext.getMethod()))) {
+            return;
+        }
+
+        boolean isApiNamespace = path.matches(API_NAMESPACE_REGEX);
+        if (isApiNamespace) {
+            return;
+        }
+        boolean isFilename = path.matches(FILENAME_REGEX);
+        if (isFilename) {
+            return;
+        }
+        boolean actualErrorResponse = resourceInfo != null && resourceInfo.getResourceMethod() != null;
+        if (actualErrorResponse) {
+            return;
+        }
+
+        LOG.info("redirect");
+
+        if (text == null)
+            text = new Scanner(Objects.requireNonNull(this.getClass().getResourceAsStream("/META-INF/resources/index.html")),
+                    StandardCharsets.UTF_8).useDelimiter("\\A").next();
+        responseContext.setStatus(200);
+        responseContext.setEntity(text, null, MediaType.TEXT_HTML_TYPE);
+    }
+}