Hey all,
for a current project I wanted to test my scripts with curl using http3.
The curl that ships with macOS 14.5 doesn't support http3, I installed
curl with the variant +htttp3.
The most basic command being something like
curl --http3 https://blog.cloudflare.com -I
works.
Other commands like
curl -Is -w '%header{location}' -o /dev/null
https://github.com/SAP/macOS-icon-generator/releases/latest
don't work. I get an empty output and an exit code 43.
During the build phase for the curl +http3 variant I get this warning:
Warning: Configuration logfiles contain indications of
-Wimplicit-function-declaration; check that features were not
accidentally disabled:
getpass_r: found in curl-8.8.0/config.log
_fseeki64: found in curl-8.8.0/config.log
IoctlSocket: found in curl-8.8.0/config.log
ioctlsocket: found in curl-8.8.0/config.log
memrchr: found in curl-8.8.0/config.log
CloseSocket: found in curl-8.8.0/config.log
closesocket: found in curl-8.8.0/config.log
Using the default macports curl +ssl variant the above command
curl -Is -w '%header{location}' -o /dev/null
https://github.com/SAP/macOS-icon-generator/releases/latest
gives me the expected output of
https://github.com/SAP/macOS-icon-generator/releases/tag/2.0.0
The difference for the two variants is the TLS library which is gnutls
for http3 and OpenSSL for the default curl.
On github there is this static curl
https://github.com/stunnel/static-curl for macOS which uses openssl,
supports http3 and works as expected.
I found this blog entry
https://daniel.haxx.se/blog/2024/06/10/http-3-in-curl-mid-2024/ which
explains to me that using openssl for http3 isn't easy and the best
choice for http3. Therefore I understand using gnutls for http3 what I
don't understand is that curl commands using the -w option break with
gnutls and http3. Shall I file a bug report for this?
As macOS curl doesn't support http3 I won't use http3 in my script as
this script needs to run on macs that don't have macports or brew
installed or download curl from the above github.
Eric
