Serve Static

将静态文件或者内嵌的文件作为服务提供的中间件.

主要功能

• StaticDir 提供了对静态本地文件夹的支持. 可以将多个文件夹的列表作为参数. 比如:

  use salvo::prelude::*;
  use salvo::serve_static::StaticDir;
  
  #[tokio::main]
  async fn main() {
      tracing_subscriber::fmt().init();
  
      let router = Router::with_path("<**path>").get(
          StaticDir::new([
              "examples/static-dir-list/static/boy",
              "examples/static-dir-list/static/girl",
          ])
          .defaults("index.html")
          .auto_list(true),
      );
  
      let acceptor = TcpListener::new("127.0.0.1:5800").bind().await;
      Server::new(acceptor).serve(router).await;
  }
  

  [package]
  name = "example-static-dir-list"
  version = "0.1.0"
  edition = "2021"
  publish = false
  
  
  [dependencies]
  salvo = { workspace = true, features = ["serve-static"] }
  tokio = { version = "1", features = ["macros"] }
  tracing = "0.1"
  tracing-subscriber = "0.3"
  

  如果在第一个文件夹中找不到对应的文件, 则会到第二个文件夹中找.

  StaticDir 支持在存在压缩文件的情况下，优先发送压缩文件。比如存在 index.html, index.html.gz, index.html.zst, index.html.br 这几个文件，则 index.html.gz, index.html.zst, index.html.br 被认为是 index.html 的预压缩版本，会根据请求信息，发送对应的压缩文件。

• 提供了对 rust-embed 的支持, 比如:

  use rust_embed::RustEmbed;
  use salvo::prelude::*;
  use salvo::serve_static::static_embed;
  
  #[derive(RustEmbed)]
  #[folder = "static"]
  struct Assets;
  
  #[tokio::main]
  async fn main() {
      tracing_subscriber::fmt().init();
  
      let router = Router::with_path("<**path>").get(static_embed::<Assets>().fallback("index.html"));
  
      let acceptor = TcpListener::new("127.0.0.1:5800").bind().await;
      Server::new(acceptor).serve(router).await;
  }
  

  [package]
  name = "example-static-embed-files"
  version = "0.1.0"
  edition = "2021"
  publish = false
  
  
  [dependencies]
  rust-embed = { workspace = true }
  salvo = { workspace = true, features = ["serve-static"] }
  tokio = { version = "1", features = ["macros"] }
  tracing = "0.1"
  tracing-subscriber = "0.3"
  

  with_fallback 可以设置在文件找不到时, 用这里设置的文件代替, 这个对应某些单页网站应用来还是有用的.