Does it not support whitespace before header filed name ?

[rclijia]

The wireshark follow tcp stream :

GET /HelloWorld.html HTTP/1.1
Host:syuqqq.xudaowang.com:8021
Accept: */*
User-Agent:Mozilla/4.0 (compatible; MSIE 5.00; Windows 98)
 Connection:Keep-Alive

however, the " Connection:Keep-Alive" start with a whitespace.
Does it not support whitespace before header filed name( version 9.2.1) ？

http_whitespace_before_header.zip

[rclijia]

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-27982
Is this reason ?

[ShogunPanda]

Yes, exactly. Supporting that white space would be a security problem.