check URL validity in XQueryUrlRewrite

Author: Nico Verwer

exist-core/pom.xml

@@ -997,6 +997,7 @@ The BaseX Team. The original license statement is also included below.]]></pream
                     <execution>
                         <id>default-compile</id>
                         <configuration>
+                            <release>11</release>
                             <excludes>
                                 <!-- compiled by the Aspectj plugin below -->
                                 <exclude>org/exist/storage/lock/EnsureLockingAspect.java</exclude>

exist-core/src/main/java/org/exist/http/urlrewrite/XQueryURLRewrite.java

@@ -362,6 +362,13 @@ protected void service(final HttpServletRequest request, final HttpServletRespon
                 }
             }
         } catch (final Throwable e) {
+            if (e instanceof IllegalArgumentException) {
+                LOG.warn("Invalid URI: {}", e.getMessage());
+                response.getWriter().print(e.getMessage());
+                response.setStatus(HttpServletResponse.SC_NOT_FOUND);
+                response.flushBuffer();
+                return;
+            }
             LOG.error("Error while processing {}: {}", request.getRequestURI(), e.getMessage(), e);
             throw new ServletException("An error occurred while processing request to " + request.getRequestURI() + ": "
                     + e.getMessage(), e);