iw7-mod/deps/curl/docs/cmdline-opts/http3-only.md
2024-08-13 05:15:34 -04:00

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Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. curl http3-only Versions HTTP 7.88.0 http1.1 http1.0 http2 http2-prior-knowledge http3 HTTP/3 Use HTTP v3 only http mutex
http1.1
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--http3-only $URL

--http3-only

Instructs curl to use HTTP/3 to the host in the URL, with no fallback to earlier HTTP versions. HTTP/3 can only be used for HTTPS and not for HTTP URLs. For HTTP, this option triggers an error.

This option allows a user to avoid using the Alt-Svc method of upgrading to HTTP/3 when you know that the target speaks HTTP/3 on the given host and port.

This option makes curl fail if a QUIC connection cannot be established, it does not attempt any other HTTP versions on its own. Use --http3 for similar functionality with a fallback.