2019-08-07 20:52:02 +08:00
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# Experimental
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Some features and functionality in curl and libcurl are considered
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**EXPERIMENTAL**.
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Experimental support in curl means:
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1. Experimental features are provided to allow users to try them out and
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provide feedback on functionality and API etc before they ship and get
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"carved in stone".
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2. You must enable the feature when invoking configure as otherwise curl will
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not be built with the feature present.
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2022-10-26 14:59:35 +08:00
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3. We strongly advise against using this feature in production.
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2019-08-07 20:52:02 +08:00
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4. **We reserve the right to change behavior** of the feature without sticking
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to our API/ABI rules as we do for regular features, as long as it is marked
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experimental.
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5. Experimental features are clearly marked so in documentation. Beware.
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## Experimental features right now
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2020-12-23 00:17:37 +08:00
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- The Hyper HTTP backend
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2019-08-07 20:52:02 +08:00
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- HTTP/3 support and options
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2022-06-16 05:33:00 +08:00
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- The rustls backend
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2022-09-21 05:30:19 +08:00
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- WebSocket
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