Added logging for not existing resource url.

cli/src/main/java/de/jplag/cli/server/ResponseData.java

@@ -2,13 +2,19 @@
 
 import java.io.InputStream;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 /**
  * Data for a http response
  * @param stream The stream containing the binary data
  * @param contentType The type of data
  * @param size The total size of the data
  */
 public record ResponseData(InputStream stream, ContentType contentType, int size) {
+
+    private static final Logger logger = LoggerFactory.getLogger(ResponseData.class);
+
     /**
      * Constructor with unknown type and size. Type will be set to PLAIN.
      * @param data The binary data to respond with
@@ -41,6 +47,9 @@ public static ResponseData fromResourceUrl(String url) {
         if (inputStream != null) {
             return new ResponseData(inputStream, ContentType.fromPath(url));
         } else {
+            logger.info(
+                    "No response data available for resource url {}. This is probably normal behaviour and the data will be pulled from a different source.",
+                    url);
             return null;
         }
     }