Fetching txt file's contents from a webhost using esp8266
Your connection to the web server is through a Squid caching proxy.  It is delivering a cached version of the file:

X-Cache: HIT from localhost
X-Cache-Lookup: HIT from localhost:3128


The Age header shows you how long the page has been in the cache:

Age: 10203


That's been cached for about 2.8 hours.

You need to tell the cache not to get a cached version, but instead to always go to the server to get the latest copy.  To do that you should be able to include a "no-cache" header in your request:

Cache-Control: no-cache


That should tell squid "Don't cache this page - get the real one".

You can also add the HTTP/1.0 version of the same thing:

Pragma: no-cache


That way if one doesn't work on that version of squid the other one should.