Bug: CURL call returns always code 200 in case de server uses HTTP/2

[JanZelenka]

When making a curl call using the CURLRequest class and the server is IIS using the HTTP 2.0 protocol, the first header starts with "HTTP/2 "
The file CURLRequest.php contains this regex parsing on line 598:
preg_match('#^HTTP\/([12]\.[01]) ([0-9]+) (.+)#', $header, $matches);

This fails to parse. It would work if the server used HTTP/2.0 but unfortunately, IIS says HTTP/2.
As a result, no status code is retrieved and CodeIgniter probably somewhere down the way decides it's 200.

CodeIgniter 4 version: 4.0.4
Affected module(s): CURLRequest
*Context: * IIS

[JanZelenka]

I did have a look at this and did some testing. This what I believe is the correct regex expression:
#^HTTP\/([12](?:\.[01])?) ([0-9]+) (.+)#

[MGatner]

Thanks! Would you submit a Pull Request with your update regex?

[JanZelenka]

I will try. Right now I'm quite under pressure from the actual commercial project and when I look at the process of correctly submitting a pull request, it takes more time than I have with the required test cases and so...

[MGatner]

I totally get it. Do what you can. I think in this case you could probably just edit the files right in GitHub: submit the updated regex and then add to https://github.com/codeigniter4/CodeIgniter4/blob/develop/tests/system/HTTP/CURLRequestTest.php a copy of testResponseHeaders() with the shortened header.