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Ohkami - intuitive and declarative web framework for Rust

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ohkami

ohkami - [狼] wolf in Japanese - is intuitive and declarative web framework.

  • macro-less and type-safe APIs for intuitive and declarative code
  • multi runtime support:tokio, async-std
build check status of ohkami crates.io License

Quick start

  1. Add to dependencies :
# This sample uses `tokio` runtime.
# `async-std` is available by feature "rt_async-std".

[dependencies]
ohkami = { version = "0.14", features = ["rt_tokio"] }
tokio  = { version = "1",    features = ["full"] }
  1. Write your first code with ohkami : 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
}
  1. Run and check the behavior :
$ cargo run
$ curl http://localhost:3000/healthz
$ curl http://localhost:3000/hello/your_name
Hello, your_name!

Snippets

handle path params

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}!")
}

handle query params / request body

use ohkami::prelude::*;
use ohkami::typed::status::{OK, Created};
use ohkami::typed::{Query, Payload, ResponseBody};

#[Query]
struct SearchQuery<'q> {
    q: &'q str,
}

async fn search(condition: SearchQuery<'_>) -> OK<String> {
    OK(format!("Something found"))
}

#[Payload(JSOND)]
struct CreateUserRequest<'req> {
    name:     &'req str,
    password: &'req str,
}

#[ResponseBody(JSONS)]
struct User {
    name: String,
}

async fn create_user(body: CreateUserRequest<'_>) -> Created<User> {
    Created(User {
        name: format!("ohkami web framework")
    })
}

#[Query], #[Payload( 〜 )] implements FromRequest trait for the struct.

( with path params : ({path params}, {FromRequest value}s...) )


use middlewares

ohkami's middlewares are called "fangs".

use ohkami::prelude::*;

struct LogRequest;
impl FrontFang for LogRequest {
    async fn bite(&self, req: &mut Request) -> Result<(), Response> {
        println!("{req:?}");
        Ok(())
    }
}

struct AppendServer;
impl BackFang for AppendServer {
    async fn bite(&self, res: &mut Response, _req: &Request) -> Result<(), Response> {
        res.headers.set()
            .Server("ohkami");
        Ok(())
    }
}

#[tokio::main]
async fn main() {
    Ohkami::with((AppendServer, LogRequest), (
        "/".GET(|| async {"Hello!"})
    )).howl("localhost:8080").await
}

pack of Ohkamis

use ohkami::prelude::*;
use ohkami::typed::ResponseBody;
use ohkami::typed::status::{Created, NoContent};

#[ResponseBody(JSONS)]
struct User {
    name: String
}

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

async fn health_check() -> NoContent {
    NoContent
}

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

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

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

testing

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 ho = hello_ohkami();

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

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

Supported protocols

  • HTTPS
  • HTTP/1.1
  • HTTP/2
  • HTTP/3
  • WebSocket

MSRV (Minimum Supported rustc Version)

Latest stable at the time of publication.

License

ohkami is licensed under MIT LICENSE (LICENSE or https://opensource.org/licenses/MIT).