Salvo 0.26.1 发布，Request 提取数据大改进

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