[HWORKS-1062] Add cors filter class to community edition

hopsworks-rest-utils/src/main/java/io/hops/hopsworks/filters/AllowCORSFilter.java

@@ -0,0 +1,35 @@
+/*
+ * This file is part of Hopsworks
+ * Copyright (C) 2020, Logical Clocks AB. All rights reserved
+ *
+ * Hopsworks is free software: you can redistribute it and/or modify it under the terms of
+ * the GNU Affero General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * Hopsworks is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE.  See the GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License along with this program.
+ * If not, see <https://www.gnu.org/licenses/>.
+ */
+package io.hops.hopsworks.filters;
+
+import javax.ws.rs.container.ContainerRequestContext;
+import javax.ws.rs.container.ContainerResponseContext;
+import javax.ws.rs.container.ContainerResponseFilter;
+import javax.ws.rs.ext.Provider;
+import java.io.IOException;
+
+@Provider
+public class AllowCORSFilter implements ContainerResponseFilter {
+
+  @Override
+  public void filter(ContainerRequestContext request, ContainerResponseContext response) throws IOException {
+    response.getHeaders().add("Access-Control-Allow-Origin", "*");
+    response.getHeaders().add("Access-Control-Allow-Headers", "origin, content-type, accept, authorization");
+    response.getHeaders().add("Access-Control-Expose-Headers", "authorization");
+    response.getHeaders().add("Access-Control-Allow-Credentials", "true");
+    response.getHeaders().add("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS, HEAD");
+  }
+}