novoid
commented
2 years ago @btrummer According to https://stackoverflow.com/questions/281682/reference-to-undeclared-entity-exception-while-working-with-xml I should have replaced them with their numeric value such as & according to this.
I played around by manually fixing the feed and re-starting the validator from https://validator.w3.org/feed/check.cgi?url=https%3A%2F%2Fkarl-voit.at%2Ffeeds%2Flazyblorg-all.atom_1.0.links-and-teaser.xml
The numeric code was not valid for the validator.
The correct form for the feed according to the validator is:
<a href="https://duckduckgo.com/?t=ffab&q=impfskeptik+deutschsprachig+europa&ia=web">und weitere</a>Funny enough, the error is introduced in the function fix_ampersands_in_url() which reverses the & to & replacement in URLs but fails for more than one ampersand in one URL which was already noted in the function description.
Unfortunately, I can't remember the details why fix_ampersands_in_url() was introduced in the first place when ampersands need to be replaced by their HTML entity counterpart.
Now I changed the behavior of fix_ampersands_in_url() so that ampersands are replaced by their HTML entity exactly once.
Issue was found by @btrummer at https://github.com/novoid/lazyblorg/issues/24#issuecomment-1002472202:
Current XML parse error in https://karl-voit.at/feeds/lazyblorg-all.atom_1.0.links-and-teaser.xml:
Line 310:
<a href="https://duckduckgo.com/?t=ffab&q=impfskeptik+deutschsprachig+europa&ia=web">und weitere</a>The first
&is not replaced with&, causing an XML parse error in KDE kontact.This is most probably not related to the usual XML feed errors from external content.