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| -rw-r--r-- | docs/HTTP2.md | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/docs/HTTP2.md b/docs/HTTP2.md index cc5a5b334..0649ccd54 100644 --- a/docs/HTTP2.md +++ b/docs/HTTP2.md @@ -96,18 +96,31 @@ curl tool curl offers the `--http2` command line option to enable use of HTTP/2. -curl offers the `--http2-prior-knowledge` command line option to enable use of +curl offers the `--http2-prior-knowledge` command line option to enable use of HTTP/2 without HTTP/1.1 Upgrade. Since 7.47.0, the curl tool enables HTTP/2 by default for HTTPS connections. +curl tool limitations +--------------------- + +The command line tool won't do any HTTP/2 multiplexing even though libcurl +supports it, simply because the curl tool is not written to take advantage of +the libcurl API that's necessary for this (the multi interface). We have an +outstanding TODO item for this and **you** can help us make it happen. + +The command line tool also doesn't support HTTP/2 server push for the same +reason it doesn't do multiplexing: it needs to use the multi interface for +that so that multiplexing is supported. + HTTP Alternative Services ------------------------- -Alt-Svc is a suggested extension with a corresponding frame (ALTSVC) in HTTP/2 -that tells the client about an alternative "route" to the same content for the -same origin server that you get the response from. A browser or long-living -client can use that hint to create a new connection asynchronously. For -libcurl, we may introduce a way to bring such clues to the applicaton and/or -let a subsequent request use the alternate route -automatically. [Spec](https://tools.ietf.org/html/draft-ietf-httpbis-alt-svc-14) +Alt-Svc is an extension with a corresponding frame (ALTSVC) in HTTP/2 that +tells the client about an alternative "route" to the same content for the same +origin server that you get the response from. A browser or long-living client +can use that hint to create a new connection asynchronously. For libcurl, we +may introduce a way to bring such clues to the applicaton and/or let a +subsequent request use the alternate route automatically. + +[Detailed in RFC 7838](https://tools.ietf.org/html/rfc7838) |