• 无宏和类型安全的 API，用于直观和声明式代码
• 多运行时 支持：tokio, async-std, worker (Cloudflare Workers)

快速入门

1. 添加到 dependencies

# This sample uses `tokio` runtime.
# `async-std` is available by feature "rt_async-std".

[dependencies]
ohkami = { version = "0.19", features = ["rt_tokio"] }
tokio  = { version = "1",    features = ["full"] }

2. 使用Ohkami编写您的第一段代码： examples/quick_start

use ohkami::prelude::*;
use ohkami::typed::status::NoContent;

async fn health_check() -> NoContent {
    NoContent
}

async fn hello(name: &str) -> String {
    format!("Hello, {name}!")
}

#[tokio::main]
async fn main() {
    Ohkami::new((
        "/healthz"
            .GET(health_check),
        "/hello/:name"
            .GET(hello),
    )).howl("localhost:3000").await
}

3. 运行并检查行为

$ cargo run

$ curl http://localhost:3000/healthz
$ curl http://localhost:3000/hello/your_name
Hello, your_name!

Cloudflare Workers通过 "rt_worker" 功能支持

npm create cloudflare ./path/to/project -- --template https://github.com/kana-rus/ohkami-templates/worker

然后您的项目目录中包含 wrangler.toml, package.json 和一个Rust库包。

通过 npm run dev 进行本地开发并通过 npm run deploy 部署！

( 有关 模板 的详细信息，请参阅README )

代码片段

处理路径参数

use ohkami::prelude::*;

#[tokio::main]
async fn main() {
    Ohkami::new((
        "/api/hello/:name"
            .GET(hello),
    )).howl("localhost:5000").await
}

async fn hello(name: &str) -> String {
    format!("Hello, {name}!")
}

处理请求体/查询参数

use ohkami::prelude::*;
use ohkami::typed::status::Created;

use ohkami::typed::{Query, Payload};
use ohkami::builtin::payload::JSON;

/* `serde = 〜` is not needed in your [dependencies] */
use ohkami::serde::{Serialize, Deserialize};

/* Payload + Deserialize for request */
#[Payload(JSON)]
#[derive(Deserialize)]
struct CreateUserRequest<'req> {
    name:     &'req str,
    password: &'req str,
}

/* Payload + Serialize for response */
#[Payload(JSON)]
#[derive(Serialize)]
struct User {
    name: String,
}

async fn create_user(body: CreateUserRequest<'_>) -> Created<User> {
    Created(User {
        name: String::from("ohkami")
    })
}

/* Shorthand for Payload + Serialize */
#[Payload(JSON/S)]
struct SearchResult {
    title: String,
}

#[Query] /* Params like `?lang=rust&q=framework` */
struct SearchQuery<'q> {
    lang:    &'q str,
    #[query(rename = "q")] /* #[serde]-compatible #[query] attribute */
    keyword: &'q str,
}

async fn search(condition: SearchQuery<'_>) -> Vec<SearchResult> {
    vec![
        SearchResult { title: String::from("ohkami") },
    ]
}

有效载荷验证

where ＜validation expression＞ 在 #[Payload()] 运行验证，当响应它或解析请求时执行。

＜validation expression＞ 是一个带有 self: &Self 的表达式，该表达式返回 Result<(), impl Display>。

use ohkami::prelude::*;
use ohkami::{typed::Payload, builtin::payload::JSON};

#[Payload(JSON/D where self.valid())]
struct Hello<'req> {
    name:   &'req str,
    repeat: usize,
}

impl Hello<'_> {
    fn valid(&self) -> Result<(), String> {
        (self.name.len() > 0).then_some(())
            .ok_or_else(|| format!("`name` must not be empty"))?;
        (self.repeat > 0).then_some(())
            .ok_or_else(|| format!("`repeat` must be positive"))?;
        Ok(())
    }
}

使用中间件

Ohkami的请求处理系统称为“fang”，并且在这个基础上实现了中间件。

use ohkami::prelude::*;

#[derive(Clone)]
struct GreetingFang;

/* utility trait for auto impl `Fang` */
impl FangAction for GreetingFang {
    async fn fore<'a>(&'a self, req: &'a mut Request) -> Result<(), Response> {
        println!("Welcomm request!: {req:?}");
        Ok(())
    }
    async fn back<'a>(&'a self, res: &'a mut Response) {
        println!("Go, response!: {res:?}");
    }
}

#[tokio::main]
async fn main() {
    Ohkami::with(GreetingFang, (
        "/".GET(|| async {"Hello, fangs!"})
    )).howl("localhost:3000").await
}

带有"sse"功能的Server-Sent Events

Ohkami使用HTTP/1.1响应，其编码方式为Transfer-Encoding: chunked。
使用一些反向代理来处理HTTP/2,3。

use ohkami::prelude::*;
use ohkami::typed::DataStream;
use tokio::time::sleep;

async fn sse() -> DataStream<String> {
    DataStream::from_iter_async((1..=5).map(|i| async move {
        sleep(std::time::Duration::from_secs(1)).await;
        Ok(format!("Hi, I'm message #{i} !"))
    }))
}

#[tokio::main]
async fn main() {
    Ohkami::new((
        "/sse".GET(sse),
    )).howl("localhost:5050").await
}

Ohkami的集合

use ohkami::prelude::*;
use ohkami::typed::status::{Created, NoContent};
use ohkami::typed::Payload;
use ohkami::builtin::payload::JSON;

#[Payload(JSON/S)]
struct User {
    name: String
}

async fn list_users() -> Vec<User> {
    vec![
        User { name: String::from("actix") },
        User { name: String::from("axum") },
        User { name: String::from("ohkami") },
    ]
}

async fn create_user() -> Created<User> {
    Created(User {
        name: String::from("ohkami web framework")
    })
}

async fn health_check() -> NoContent {
    NoContent
}

#[tokio::main]
async fn main() {
    // ...

    let users_ohkami = Ohkami::new((
        "/"
            .GET(list_users)
            .POST(create_user),
    ));

    Ohkami::new((
        "/healthz"
            .GET(health_check),
        "/api/users"
            .By(users_ohkami), // nest by `By`
    )).howl("localhost:5000").await
}

测试

use ohkami::prelude::*;
use ohkami::testing::*; // <--

fn hello_ohkami() -> Ohkami {
    Ohkami::new((
        "/hello".GET(|| async {"Hello, world!"}),
    ))
}

#[cfg(test)]
#[tokio::test]
async fn test_my_ohkami() {
    let t = hello_ohkami().test();

    let req = TestRequest::GET("/");
    let res = t.oneshot(req).await;
    assert_eq!(res.status(), Status::NotFound);

    let req = TestRequest::GET("/hello");
    let res = t.oneshot(req).await;
    assert_eq!(res.status(), Status::OK);
    assert_eq!(res.text(), Some("Hello, world!"));
}

支持的协议

• HTTP/1.1
• HTTP/2
• HTTP/3
• HTTPS
• Server-Sent Events
• WebSocket

MSRV（最小支持的Rust版本）

最新稳定版

许可证

ohkami遵循MIT许可证（LICENSE 或 https://opensource.org/licenses/MIT）。