resources - provided extension point on ResourcesRoute constructor al…

…lowing to override behaviour forbidding usage of / baseResourcePath, in case someone would like to

serve resources from root classpath, even if this is not advised from a security standpoint

restx-core/src/main/java/restx/ResourcesRoute.java

@@ -91,15 +91,24 @@ public ResourcesRoute(String name, String baseRestPath, String baseResourcePath,
     public ResourcesRoute(String name, String baseRestPath, String baseResourcePath, ImmutableMap<String, String> aliases, List<CachedResourcePolicy> cachedResourcePolicies) {
         this.name = checkNotNull(name);
         this.baseRestPath = ("/" + checkNotNull(baseRestPath) + "/").replaceAll("/+", "/");
-        this.baseResourcePath = checkNotNull(baseResourcePath)
-                .replace('.', '/').replaceAll("^/", "").replaceAll("/$", "") + "/";
-        if("/".equals(this.baseResourcePath)){
-            throw new IllegalArgumentException("Please, avoid using '/' as ResourcesRoute's baseResourcePath as it represents serious security flaws (people will be able to read your classpath configuration files)");
-        }
+        this.baseResourcePath = this.ensureBaseResourcePathValid(baseResourcePath);
         this.aliases = checkNotNull(aliases);
         this.cachedResourcePolicies = ImmutableList.copyOf(cachedResourcePolicies);
     }
 
+    protected String ensureBaseResourcePathValid(String baseResourcePath) {
+        String escapedBaseResourcePath = checkNotNull(baseResourcePath)
+                .replace('.', '/')
+                .replaceAll("^/", "")
+                .replaceAll("/$", "") + "/";
+
+        if("/".equals(escapedBaseResourcePath)){
+            throw new IllegalArgumentException("Please, avoid using '/' as ResourcesRoute's baseResourcePath as it represents serious security flaws (people will be able to read your classpath configuration files)");
+        }
+
+        return escapedBaseResourcePath;
+    }
+
     @Override
     public Optional<RestxHandlerMatch> match(RestxRequest req) {
         if (req.getHttpMethod().equals("GET") && req.getRestxPath().startsWith(baseRestPath)) {