handle double slash in path

provider/search-azure/src/main/java/org/opengroup/osdu/search/provider/azure/security/RequestRejectedExceptionFilter.java

+package org.opengroup.osdu.search.provider.azure.security;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.springframework.core.Ordered;
+import org.springframework.core.annotation.Order;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.security.web.firewall.RequestRejectedException;
+import org.springframework.stereotype.Component;
+import org.springframework.web.filter.GenericFilterBean;
+
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+@Component
+@Order(Ordered.HIGHEST_PRECEDENCE)
+public class RequestRejectedExceptionFilter extends GenericFilterBean {
+
+    @Override
+    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
+        try {
+            chain.doFilter(req, res);
+        } catch (RequestRejectedException e) {
+            HttpServletRequest request = (HttpServletRequest) req;
+            HttpServletResponse response = (HttpServletResponse) res;
+            this.handleRequestRejectedException(request, response);
+        }
+    }
+
+    private void handleRequestRejectedException(HttpServletRequest request, HttpServletResponse response) throws IOException {
+        ObjectMapper mapper = new ObjectMapper();
+        ObjectNode node = mapper.createObjectNode();
+        node.put("code", org.apache.http.HttpStatus.SC_BAD_REQUEST);
+        node.put("reason", "Bad Request");
+        node.put("message", "Invalid URL was given on request");
+        String jsonErrorResponse = mapper.writeValueAsString(node);
+
+        response.setStatus(HttpStatus.BAD_REQUEST.value());
+        response.setContentType(MediaType.APPLICATION_JSON.toString());
+        response.getWriter().append(jsonErrorResponse);
+    }
+}
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