Liegt wohl daran, dass der Feed kein Expires oder Last-Modified- HTTP-header hat.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
T:\>GET -USsed https://www.perl-community.de/bat/blog/xml_rss
GET https://www.perl-community.de/bat/blog/xml_rss
User-Agent: lwp-request/6.39 libwww-perl/6.39
200 OK
Connection: close
Date: Tue, 15 Oct 2019 12:24:31 GMT
Server: Apache
Vary: Accept-Encoding
Content-Type: text/xml; charset=utf-8
Client-Date: Tue, 15 Oct 2019 12:24:30 GMT
Client-Peer: 188.40.117.67:443
Client-Response-Num: 1
Client-SSL-Cert-Issuer: /C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3
Client-SSL-Cert-Subject: /CN=www.perl-community.de
Client-SSL-Cipher: AES256-SHA
Client-SSL-Socket-Class: IO::Socket::SSL
Client-Transfer-Encoding: chunked
X-No-Archive: yes