2023-01-09 22:00:34 +08:00
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Long: http3-only
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Tags: Versions
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Protocols: HTTP
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Added: 7.88.0
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Mutexed: http1.1 http1.0 http2 http2-prior-knowledge http3
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Requires: HTTP/3
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Help: Use HTTP v3 only
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See-also: http1.1 http2 http3
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Category: http
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Example: --http3-only $URL
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Multi: mutex
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Experimental: yes
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---
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Instructs curl to use HTTP/3 to the host in the URL, with no fallback to
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earlier HTTP versions. HTTP/3 can only be used for HTTPS and not for HTTP
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URLs. For HTTP, this option will trigger an error.
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This option allows a user to avoid using the Alt-Svc method of upgrading to
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HTTP/3 when you know that the target speaks HTTP/3 on the given host and port.
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This option will make curl fail if a QUIC connection cannot be established, it
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will not attempt any other HTTP version on its own. Use --http3 for similar
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2023-02-08 05:50:36 +08:00
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functionality *with* a fallback.
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