PDF export - Need to normalize URL before doing a http query

[pmauduit]

On a PDF export, it is sometimes necessary to includes graphics coming from the webapp, but the way the links are generated is not compatible with the filters used in the Security-proxy.

Example of URL:

https://dev.gdi-etau.telekom.de:/geonetwork/srv/../images/logos/4076b845-a70c-4264-9cad-f22164c8f678.png

Here is the code which is currently failing to retrieve the image:
https://github.com/georchestra/geonetwork/blob/georchestra-gn3.8.2/services/src/main/java/org/fao/geonet/api/records/formatters/ImageReplacedElementFactory.java#L134

1. the port is not specified, because it was not set in the settings UI (the secured port was set though). Setting 443 in the classic port solved the extra ":". It is not necessary though, the URL is still valid, and can pass the URI.normalize() step.
2. The Security-Proxy (via the spring-security configuration) will reject non-normalized URLs.
3. Trying the URL using tools like cURL is transparent because it will normalize the URL before sending it. we might want to use --path-as-is to disable the behaviour:

       --path-as-is
              Tell  curl  to  not handle sequences of /../ or /./ in the given
              URL path. Normally curl will squash or merge them  according  to
              standards but with this option set you tell it not to do that.

We could use the java.net.URI class and the normalize() method before trying to fetch the URL.
Also line 132, the log level might not be very relevant, I would suggest debug instead of error.