Handling of low ports (80, 443)

[GGoetzelmann]

This needs further investigation, but something may be amiss with using low ports which should be excluded from requests.

The RESTapi is quite benevolent and will answer both to http://localhost/ and http://localhost:80 requests, while internally the IRI will be set to http://localhost. This may cause confusing side effects such as empty results for SPARQL requests expecting IRIs starting with localhost:80. While this is already somewhat documented in https://github.com/kit-data-manager/wap-server/blob/main/howtos/root_container.md , a more prominent documentation may be warranted.

Running the dockerized version, the following combination works:

• setting host port to 80
• setting WapBaseUrl to http://localhost

However, if WapBaseUrl is erronously set to http://localhost:80, this is taken literally (IRIs in the jena db now start with localhost:80, but due to request rewriting, they basically become unreachable, because all requests will go to http://localhost/wap/ instead. While this is somewhat of an configuration error, we may still be able to handle this case more gracefully. At minimum this may also warrant more prominent documentation -> URI definitions (and requests) should never include those low ports explicitly to avoid problems.