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  • [X] I’m using stock docker compose setup, unmodified.
  • [ ] I’m using docker compose setup, with modifications (modified .yml files, third party plugins/themes, etc.) - if so, describe your modifications in your post. Before reporting, see if your issue can be reproduced on the unmodified setup.
  • [ ] I’m not using docker on my primary instance, but my issue can be reproduced on the aforementioned docker setup and/or official demo.

Found out, than if link too feed home site has _ in names tt-rss can’t parse it correctly. Not with normal run, not with debug.

Simple feed code: (added extra spaces before tags)

< rss version=“2.0” xmlns:atom=“Atom Syndication Format namespace”>
< channel>
< title>Hard and soft< /title>
< description>RSS feed for Hard and soft< /description>
< link>https://hard_and_soft.site.com< /link>
< atom:link href=“http://site.com/rss/hard_and_soft.xml” rel=“self” type=“application/rss+xml” />
< language>ru< /language>

<item>
<guid isPermaLink="false">https://hard_and_sof.site.com/post/474023041</guid>
  <title>
    <![CDATA[Пост №: 474023041 [Photo - JPG ] ]]>
  </title>
  <description>
    <![CDATA[Тэги: --- <br/>.
              <img height="650px" src="https://hard_and_sof.site.com/post/474023041.jpg" alt=""><br /><br />]]>
  </description>
  <link>https://hard_and_sof.site.com/post/474023041</link>
  <pubDate>Tue, 01 Mar 2022 01:30:07 +0300</pubDate>
</item>

Log from debug:

[23:06:19/535] processing feed data…
[23:06:19/535] site_url:
[23:06:19/535] feed_title: Hard and soft

  • Tiny Tiny RSS version (including git commit id):

v22.02-a395574 (last from repo)

  • Platform (i.e. Linux distro, Docker, PHP, PostgreSQL, etc) versions:

Ubuntu 20.04, Docker version 20.10.12, build e91ed57

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https://www.google.com/search?q=underscore+in+url

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This is the problem. It’s ok for domain names (AKA DNS labels) to have underscores, but you can’t actually use them as hostnames in that case. In other words, you can’t connect to them or use them as part of a URL. tt-rss is doing the right thing by being strict imho.

Reference: dns - Can (domain name) subdomains have an underscore "_" in it? - Stack Overflow

Other RFC mentioned here deal with different things. The original question was for domain names. If the question is for host names (or for URLs, which include a host name), then this is different, the relevant standard is RFC 1123, section 2.1 “Host Names and Numbers” which limits host names to letters-digits-hyphen.

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Thank you for reply. Didn’t know about this.