2024-05-15 15:20:32 -04:00
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---
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2023-12-11 20:30:44 -05:00
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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: no-alpn
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Tags: HTTP/2
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Protocols: HTTPS
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Added: 7.36.0
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Requires: TLS
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Help: Disable the ALPN TLS extension
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Category: tls http
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Multi: boolean
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2024-05-15 15:20:32 -04:00
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See-also:
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- no-npn
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- http2
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Example:
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- --no-alpn $URL
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2023-12-11 20:30:44 -05:00
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---
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2024-05-15 15:20:32 -04:00
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# `--no-alpn`
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2023-12-11 20:30:44 -05:00
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Disable the ALPN TLS extension. ALPN is enabled by default if libcurl was built
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with an SSL library that supports ALPN. ALPN is used by a libcurl that supports
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HTTP/2 to negotiate HTTP/2 support with the server during https sessions.
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Note that this is the negated option name documented. You can use --alpn to
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enable ALPN.
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