Remove -q
and you'll see:
--2017-04-20 14:25:53-- https://example.com/test
Resolving example.com... 93.184.216.34, 2606:2800:220:1:248:1893:25c8:1946
Connecting to example.com|93.184.216.34|:443... connected.
HTTP request sent, awaiting response... 404 Not Found
2017-04-20 14:25:53 ERROR 404: Not Found.
The URL is a 404 error page. Consequently text.xml
is empty.
Then if you look at the manual:
--content-on-error
If this is set to on, wget will not skip the content when the
server responds with a http status code that indicates error.
So:
wget -q --content-on-error -O test.xml https://example.com/test
… successfully downloads that resource.
It isn't valid XML though. The HTML 5 Doctype breaks it.