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46 lines
1.5 KiB
Markdown
46 lines
1.5 KiB
Markdown
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---
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title: HTTP/2.0
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menu: docs_proto
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weight: 250
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---
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如果可能`actix-web`自动升级到*HTTP/2.0*的连接。
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# 协议
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*HTTP/2.0* protocol over tls without prior knowledge requires [tls alpn](https://tools.ietf.org/html/rfc7301).
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> 目前，只有`rust-openssl`支持
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`alpn`协议需要启用该功能。启用后，HttpServer提供 serve_tls方法。
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[serve_tls](https://actix.rs/actix-web/actix_web/server/struct.HttpServer.html#method.serve_tls) method.
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```toml
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[dependencies]
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actix-web = { version = "{{< actix-version "actix-web" >}}", features = ["alpn"] }
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openssl = { version = "0.10", features = ["v110"] }
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```
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```rust
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use std::fs::File;
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use actix_web::*;
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use openssl::ssl::{SslMethod, SslAcceptor, SslFiletype};
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fn main() {
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// load ssl keys
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let mut builder = SslAcceptor::mozilla_intermediate(SslMethod::tls()).unwrap();
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builder.set_private_key_file("key.pem", SslFiletype::PEM).unwrap();
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builder.set_certificate_chain_file("cert.pem").unwrap();
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HttpServer::new(
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|| App::new()
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.resource("/index.html", |r| r.f(index)))
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.bind("127.0.0.1:8080").unwrap();
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.serve_ssl(builder).unwrap();
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}
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```
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不支持升级到[rfc section 3.2](https://http2.github.io/http2-spec/#rfc.section.3.2) 节中描述的HTTP/2.0模式 。明文连接和tls连接都支持*HTTP/2* with prior knowledge启动,[rfc section 3.4](https://http2.github.io/http2-spec/#rfc.section.3.4)
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查看具体示例[examples/tls](https://github.com/actix/examples/tree/master/tls).
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