Salvo 是 Rust 语言编写的简单易用, 又不失功能强大的 Web 后端框架.

此版本主要改进了 Request 数据提取的功能:

可以轻松地从多个不同数据源获取数据, 并且组装为你想要的类型. 可以先定义一个自定义的类型, 比如:

#[derive(Serialize, Deserialize, Extractible, Debug)]
/// 默认从 body 中获取数据字段值
#[extract(default_source(from = "body"))]
struct GoodMan<'a> {
    /// 其中, id 号从请求路径参数中获取, 并且自动解析数据为 i64 类型.
    #[extract(source(from = "param"))]
    id: i64,
    /// 可以使用引用类型, 避免内存复制.
    username: &'a str,
    first_name: String,
    last_name: String,
}

然后在 Handler 中可以这样获取数据:

#[fn_handler]
async fn edit(req: &mut Request) -> String {
    let good_man: GoodMan<'_> = req.extract().await.unwrap();
}

甚至于可以直接把类型作为参数传入函数, 像这样:

#[fn_handler]
async fn edit<'a>(good_man: GoodMan<'a>) -> String {
    res.render(Json(good_man));
}

数据类型的定义有相当大的灵活性, 甚至可以根据需要解析为嵌套的结构:

#[derive(Serialize, Deserialize, Extractible, Debug)]
#[extract(default_source(from = "body", format = "json"))]
struct GoodMan<'a> {
    #[extract(source(from = "param"))]
    id: i64,
    #[extract(source(from = "query"))]
    username: &'a str,
    first_name: String,
    last_name: String,
    lovers: Vec<String>,
    /// 这个 nested 字段完全是从 Request 重新解析.
    #[extract(source(from = "request"))]
    nested: Nested<'a>,
}

#[derive(Serialize, Deserialize, Extractible, Debug)]
#[extract(default_source(from = "body", format = "json"))]
struct Nested<'a> {
    #[extract(source(from = "param"))]
    id: i64,
    #[extract(source(from = "query"))]
    username: &'a str,
    first_name: String,
    last_name: String,
    #[extract(rename = "lovers")]
    #[serde(default)]
    pets: Vec<String>,
}

查看完整源码

Github: https://github.com/salvo-rs/salvo