From cfde865cb2e455bd805105e31c06a3dab167f069 Mon Sep 17 00:00:00 2001
From: Manfred Riem <mriem@manorrock.com>
Date: Mon, 18 Dec 2023 16:58:52 -0600
Subject: [PATCH] Fixes #131 - Add API version check (#132)

---
 .../webapp/ApiVersionCheckResource.java       | 29 +++++++++++++++++++
 .../webapp/JakartaRestConfiguration.java      |  2 +-
 2 files changed, 30 insertions(+), 1 deletion(-)
 create mode 100644 webapp/src/main/java/com/manorrock/toyger/webapp/ApiVersionCheckResource.java

diff --git a/webapp/src/main/java/com/manorrock/toyger/webapp/ApiVersionCheckResource.java b/webapp/src/main/java/com/manorrock/toyger/webapp/ApiVersionCheckResource.java
new file mode 100644
index 0000000..e09e262
--- /dev/null
+++ b/webapp/src/main/java/com/manorrock/toyger/webapp/ApiVersionCheckResource.java
@@ -0,0 +1,29 @@
+package com.manorrock.toyger.webapp;
+
+import jakarta.ws.rs.GET;
+import jakarta.ws.rs.Path;
+import jakarta.ws.rs.core.Response;
+
+/**
+ * The API version checkout.
+ *
+ * @see https://distribution.github.io/distribution/spec/api/#api-version-check
+ * @author MAnfred Riem (mriem@manorrock.com)
+ */
+@Path("v2")
+public class ApiVersionCheckResource {
+
+    /**
+     * Return status 200 with header 
+     * 'Docker-Distribution-API-Version: registry/2.0'.
+     *
+     * @return the response.
+     */
+    @GET
+    public Response apiVersionCheck() {
+        return Response
+                .ok()
+                .header("Docker-Distribution-API-Version", "registry/2.0")
+                .build();
+    }
+}
diff --git a/webapp/src/main/java/com/manorrock/toyger/webapp/JakartaRestConfiguration.java b/webapp/src/main/java/com/manorrock/toyger/webapp/JakartaRestConfiguration.java
index 9fae2df..711b836 100644
--- a/webapp/src/main/java/com/manorrock/toyger/webapp/JakartaRestConfiguration.java
+++ b/webapp/src/main/java/com/manorrock/toyger/webapp/JakartaRestConfiguration.java
@@ -7,7 +7,7 @@
  * Configures Jakarta RESTful Web Services for the application.
  * @author Juneau
  */
-@ApplicationPath("resources")
+@ApplicationPath("")
 public class JakartaRestConfiguration extends Application {
     
 }