Firefox stalls on redirect to CAS

[Maulinuxops]

Hi, phpCAS v1.6.0 as supplied with moodle v4.1.4 here.

It seems that the redirect to the CAS auth page obtained at URL http://moodle.server/login.php?authCAS=CAS makes Firefox stall waiting for page content; Chrome changes URL immediately without delay instead.

The reply sent by the server is as follows:

HTTP/1.1 302 Found
< Server: nginx/1.18.0 (Ubuntu)
< Date: Tue, 09 Jul 2024 09:12:22 GMT
< Content-Type: text/html; charset=utf-8
< Transfer-Encoding: chunked
< Connection: keep-alive
< Set-Cookie: MoodleSession=xxxxxxxxxxx; path=/
< Expires: Thu, 19 Nov 1981 08:52:00 GMT
< Cache-Control: no-store, no-cache, must-revalidate
< Pragma: no-cache
< Location: https://cas.server/cas/login?service=http%3A%2F%2Fmoodle.server%2Flogin%2Findex.php%3FauthCAS%3DCAS&gateway=true
< Set-Cookie: NSC_XXXX_XXXXXXXXXXXX_XXXX=xxxxxx;expires=Tue, 09-Jul-2024 11:11:54 GMT;path=/;secure;httponly
< Strict-Transport-Security: max-age=157680000

Since the connection is keep-alive and the transfer is chunked Firefox is likely waiting a content that never arrives.

Is this a moodle issue or a phpCAS issue? How can I change the Connection header to "Connection: close", which seems to fix this issue?

Thanks a lot in advance for support!

P.S.: adding a "Content-Length: 0" header should also work

[Maulinuxops]

The following patch for v1.6.0 seems to fix the issue

phpCAS_Client.php.diff.gz