Custom shortcode to display the date when a remote rss feed was last updated (e.g. Substack, Mastodon)

support
8

I was able to reproduce the problem. As noted above, substack serves the feeds with content-type “application/xml”. Add this to your site configuration:

[mediaTypes."application/xml"]
suffixes = ["rss"]

Some of the feeds you’re visiting (e.g., https://nitter.poast.org/tworepcave/rss) refuse the connection, causing the build to fail. Change your shortcode to emit a warning instead:

{{ with .Get "url" }}
  {{ with resources.GetRemote . }}
    {{ with .Err }}
      {{ warnf "%s" . }}
    {{ else }}
      {{ with .Content | transform.Unmarshal }}
        {{ with .channel.item }}
          {{ range first 1 . }}
            {{ with .pubDate }}
              {{ dateFormat "2006-01-02" . }}
            {{ end }}
          {{ end }}
        {{ end }}
      {{ end }}
    {{ end }}
  {{ end }}
{{ end }}

With so many resources.GetRemote calls, you may want to increase the build time-out in your site configuration:

timeout = '10m'