68 lines
2.3 KiB
Markdown
68 lines
2.3 KiB
Markdown
<!--
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Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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-->
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# Items to be removed from future curl releases
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If any of these deprecated features is a cause for concern for you, please
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email the
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[curl-library mailing list](https://lists.haxx.se/listinfo/curl-library)
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as soon as possible and explain to us why this is a problem for you and
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how your use case cannot be satisfied properly using a workaround.
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## TLS libraries without 1.3 support
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curl drops support for TLS libraries without TLS 1.3 capability after May
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2025.
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It requires that a curl build using the library should be able to negotiate
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and use TLS 1.3, or else it is not good enough.
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As of May 2024, the libraries that need to get fixed to remain supported after
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May 2025 are: BearSSL and Secure Transport.
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## Hyper
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Hyper is an alternative HTTP backend for curl. It uses the hyper library and
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could in theory be used for HTTP/1, HTTP/2 and even HTTP/3 in the future with
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curl.
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The original plan and goal was that we would add this HTTP alternative (using
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a memory-safe library) and that users could eventually build and use libcurl
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exactly as previously but with parts of the core being more memory-safe.
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The hyper implementation ran into some snags and 10-15 tests and HTTP/2
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support have remained disabled with hyper. For these reasons, hyper support
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has remained tagged EXPERIMENTAL.
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It is undoubtedly hard work to fix these remaining problems, as they typically
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require both rust and C knowledge in addition to deep HTTP familiarity. There
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does not seem to be that many persons interested or available for this
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challenge. Meanwhile, there is little if any demand for hyper from existing
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(lib)curl users.
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Finally: having support for hyper in curl has a significant cost: we need to
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maintain and develop a lot of functionality and tests twice to make sure
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libcurl works identically using either HTTP backend.
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The only way to keep hyper support in curl is to give it a good polish by
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someone with time, skill and energy to spend on this task.
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Unless a significant overhaul has proven to be in progress, hyper support is
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removed from curl after February 2025.
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## Past removals
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- Pipelining
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- axTLS
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- PolarSSL
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- NPN
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- Support for systems without 64-bit data types
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- NSS
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- gskit
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- MinGW v1
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- NTLM_WB
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- space-separated `NOPROXY` patterns
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