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Guide: updates to HTTP/2 chapter.

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memoryruins 2018-04-06 18:46:56 -04:00
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@ -1,13 +1,15 @@
# HTTP/2.0
Actix web automatically upgrades connection to *HTTP/2.0* if possible.
Actix web automatically upgrades connections to *HTTP/2.0* if possible.
## Negotiation
*HTTP/2.0* protocol over tls without prior knowledge requires
[tls alpn](https://tools.ietf.org/html/rfc7301). At the moment only
`rust-openssl` has support. Turn on the `alpn` feature to enable `alpn` negotiation.
With enabled `alpn` feature `HttpServer` provides the
[tls alpn](https://tools.ietf.org/html/rfc7301).
> Currently, only `rust-openssl` has support.
`alpn` negotiation requires enabling the feature. When enabled, `HttpServer` provides the
[serve_tls](../actix_web/struct.HttpServer.html#method.serve_tls) method.
```toml
@ -35,10 +37,10 @@ fn main() {
}
```
Upgrade to *HTTP/2.0* schema described in
Upgrades to *HTTP/2.0* schema described in
[rfc section 3.2](https://http2.github.io/http2-spec/#rfc.section.3.2) is not supported.
Starting *HTTP/2* with prior knowledge is supported for both clear text connection
and tls connection. [rfc section 3.4](https://http2.github.io/http2-spec/#rfc.section.3.4)
Please check [example](https://github.com/actix/actix-web/tree/master/examples/tls)
for a concrete example.
> Check the [examples/tls](https://github.com/actix/actix-web/tree/master/examples/tls)
> for a concrete example.