<div align="center">
<h1>Ohkami</h1>
Ohkami <em>- [狼] wolf in Japanese -</em> is a performant, declarative, and runtime-flexible web framework for Rust.
</div>
<br>
- *macro-less and type-safe* APIs for declarative, ergonomic code
- *runtime-flexible* ： `tokio`, `smol`, `nio`, `glommio`, `monoio`, `compio` and `worker` (Cloudflare Workers), `lambda` (AWS Lambda)
- good performance, no-network testing, well-structured middlewares, Server-Sent Events, WebSocket, highly integrated OpenAPI document generation, ...
<div align="right">
<a href="https://github.com/ohkami-rs/ohkami/blob/main/LICENSE"><img alt="License" src="https://img.shields.io/crates/l/ohkami.svg" /></a>
<a href="https://github.com/ohkami-rs/ohkami/actions"><img alt="build check status of ohkami" src="https://github.com/ohkami-rs/ohkami/actions/workflows/CI.yml/badge.svg"/></a>
<a href="https://crates.io/crates/ohkami"><img alt="crates.io" src="https://img.shields.io/crates/v/ohkami" /></a>
</div>
<br>
## Quick Start
1. Add to `dependencies` :
```toml
[dependencies]
ohkami = { version = "0.24", features = ["rt_tokio"] }
tokio = { version = "1", features = ["full"] }
```
2. Write your first code with Ohkami : [examples/quick_start](https://github.com/ohkami-rs/ohkami/blob/main/examples/quick_start/src/main.rs)
```rust,no_run
use ohkami::{Ohkami, Route};
use ohkami::claw::{Path, status};
async fn health_check() -> status::NoContent {
status::NoContent
}
async fn hello(Path(name): Path<&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. Run and check the behavior :
```sh
$ cargo run
```
```sh
$ curl http://localhost:3000/healthz
$ curl http://localhost:3000/hello/your_name
Hello, your_name!
```
<br>
## Core APIs
### `Ohkami`
`Ohkami` is the main entry point of Ohkami application:
a collection of `Route`s and `Fang`s, and provides `.howl()`/`.howls()` method to run the application.
```rust,ignore
Ohkami::new((
// global fangs
Fang1,
Fang2,
// routes
"/hello"
.GET(hello_handler)
.POST(hello_post_handler),
"/goodbye"
.GET((
// local fangs
Fang3,
Fang4,
goodbye_handler // handler
)),
)).howl("localhost:3000").await;
```
`.howls()` (`tls` feature only) is used to run Ohkami with TLS (HTTPS) support
upon [`rustls`](https://github.com/rustls) ecosystem.
`howl(s)` supports graceful shutdown by `Ctrl-C` ( `SIGINT` ) on native runtimes.
### `Route`
`Route` is the core trait to define Ohkami's routing:
- `.GET()`, `.POST()`, `.PUT()`, `.PATCH()`, `.DELETE()`, `.OPTIONS()` to define API endpoints
- `.By({another Ohkami})` to nest `Ohkami`s
- `.Mount({directory path})` to serve static directory
(pre-compressed files with `gzip`, `deflate`, `br`, `zstd` are supported)
Here `GET`, `POST`, etc. takes a *handler* function:
```rust,ignore
async fn({FromRequest type},*) -> {IntoResponse type}
```
On native runtimes, whole a handler must be `Send + Sync + 'static`
and the return future must be `Send + 'static`.
### `fang`s
Ohkami's request handling system is called `fang`; all handlers and middlewares are built on it.
```rust,ignore
/* simplified for description */
pub trait Fang<Inner: FangProc> {
type Proc: FangProc;
fn chain(&self, inner: Inner) -> Self::Proc;
}
pub trait FangProc {
async fn bite<'b>(&'b self, req: &'b mut Request) -> Response;
}
```
built-ins:
- `BasicAuth`, `Cors`, `Csrf`, `Jwt` (authentication/security)
- `Context` (reuqest context)
- `Enamel` (security headers; experimantal)
- `Timeout` (handling timeout; native runtimes only)
- `openapi::Tag` (tag for OpenAPI document generation; `openapi` feature only)
Ohkami provides `FangAction` utility trait to implement `Fang` trait easily:
```rust,ignore
/* simplified for description */
pub trait FangAction {
async fn fore<'a>(&'a self, req: &'a mut Request) -> Result<(), Response> {
// default implementation is empty
Ok(())
}
async fn back<'a>(&'a self, res: &'a mut Response) {
// default implementation is empty
}
}
```
Additionally, you can apply fangs both as **global fangs** to an `Ohkami` or
as **local fangs** to a specific handler (described below).
### `claw`s
Ohkami provides `claw` API: handler parts designed for declarative way to
extract request data and construct response data:
- `content` - typed content {extracted from request / for response} of specific format
- built-ins: `Json<T>`, `Text<T>`, `Html<T>`, `UrlEncoded<T>`, `Multipart<T>`
- `param` - typed parameters extracted from request
- built-ins: `Path<P>`, `Query<T>`
- `header` - types for specific header extracted from request
- built-ins: types for standard request headers
- `status` - types for response with specific status code
- built-ins: types for standard response status codes
<sm><i>(
here <code>T</code> means a type that implements
<code>serde::Deserialize</code> for request and
<code>serde::Serialize</code> for response,
and <code>P</code> means a type that implements
<code>FromParam</code> or
a tuple of such types.
)</i></sm>
The number of path parameters extracted by `Path` is **automatically asserted**
to be the same or less than the number of path parameters contained in the route path
when the handler is registered to routing.
```rust,ignore
async fn handler0(
Path(param): Path<FromParamType>,
) -> Json<SerializeType> {
// ...
}
async fn handler1(
Json(req): Json<Deserialize0>,
Path((param0, param1)): Path<(FromParam0, FromParam1)>,
Query(query): Query<Deserialize1>,
) -> status::Created<Json<Serialize0>> {
// ...
}
```
<br>
## Feature flags
### `"rt_tokio"`, `"rt_smol"`, `"rt_nio"`, `"rt_glommio"`, `"rt_monoio"`, `"rt_compio"` : native async runtime
- [tokio](https://github.com/tokio-rs/tokio) _v1.\*.\*_
- [smol](https://github.com/smol-rs/smol) _v2.\*.\*_
- [nio](https://github.com/nurmohammed840/nio) _v0.0.\*_
- [glommio](https://github.com/DataDog/glommio) _v0.9.\*_
- [monoio](https://github.com/bytedance/monoio) _v0.2.\*_
- [compio](https://github.com/compio-rs/compio) _v0.15.\*_
### `"rt_worker"` : Cloudflare Workers
- [worker](https://github.com/cloudflare/workers-rs) _v0.6.\*_
Ohkami has first-class support for Cloudflare Workers:
- `#[worker]` macro to define a Worker
- `#[bindings]`, `ws::SessionMap` helper
- better `DurableObject`
- not require `Send` `Sync` bound for handlers or fangs
- [worker_openapi.js](https://github.com/ohkami-rs/ohkami/tree/main/scripts/worker_openapi.js) script to generate OpenAPI document from `#[worker]` fn
And also maintains useful project template. Run :
```sh
npm create cloudflare ＜project dir＞ -- --template https://github.com/ohkami-rs/templates/worker
```
then `＜project dir＞` will have `wrangler.jsonc`, `package.json` and a Rust library crate.
`#[ohkami::worker] async? fn({bindings}?) -> Ohkami` is the Worker definition.
Local dev by `npm run dev` and deploy by `npm run deploy` !
See
- `worker*` temaplates in [template repository](https://github.com/ohkami-rs/templates)
- `worker*` samples in [samples directory](https://github.com/ohkami-rs/ohkami/tree/main/samples)
- `#[worker]`'s documentation comment in [macro definitions](https://github.com/ohkami-rs/ohkami/tree/main/ohkami_macros/src/lib.rs)
for wokring examples and detailed usage of `#[worker]` (and/or `openapi`).
### `"rt_lambda"` : AWS Lambda
- [lambda_runtime](https://github.com/awslabs/aws-lambda-rust-runtime) _v0.14.\*_ with `tokio`
Both `Function URLs` and `API Gateway` are supported, and WebSocket is not supported.
[cargo lambda](https://crates.io/crates/cargo-lambda) will be good partner. Let's run :
```sh
cargo lambda new ＜project dir＞ --template https://github.com/ohkami-rs/templates
```
`lambda_runtime::run(your_ohkami)` make `you_ohkami` run on Lambda Function.
Local dev by
```sh
cargo lambda watch
```
and deploy by
```sh
cargo lambda build --release [--compiler cargo] [and more]
cargo lambda deploy [--role ＜arn-of-a-iam-role＞] [and more]
```
See
* README of [template](https://github.com/ohkami-rs/templates/tree/main/template)
* [Cargo Lambda document](https://www.cargo-lambda.info)
for details.
### `"sse"` : Server-Sent Events
Ohkami responds with HTTP/1.1 `Transfer-Encoding: chunked`.\
Use some reverse proxy to do with HTTP/2,3.
```rust,no_run
use ohkami::{Ohkami, Route};
use ohkami::sse::DataStream;
use tokio::time::{sleep, Duration};
async fn handler() -> DataStream {
DataStream::new(|mut s| async move {
s.send("starting streaming...");
for i in 1..=5 {
sleep(Duration::from_secs(1)).await;
s.send(format!("MESSAGE #{i}"));
}
s.send("streaming finished!");
})
}
#[tokio::main]
async fn main() {
Ohkami::new((
"/sse".GET(handler),
)).howl("localhost:3020").await
}
```
### `"ws"` : WebSocket
```rust,no_run
use ohkami::{Ohkami, Route};
use ohkami::ws::{WebSocketContext, WebSocket, Message};
async fn echo_text(ctx: WebSocketContext<'_>) -> WebSocket {
ctx.upgrade(|mut conn| async move {
while let Ok(Some(Message::Text(text))) = conn.recv().await {
conn.send(text).await.expect("failed to send text");
}
})
}
#[tokio::main]
async fn main() {
Ohkami::new((
"/ws".GET(echo_text),
)).howl("localhost:3030").await
}
```
* On `"rt_worker"`, both normal ( stateless ) WebSocket and WebSocket on Durable Object are available!
* On `"rt_lambda"`, WebSocket is currently not supported.
### `"openapi"` : OpenAPI document generation
`"openapi"` provides highly integrated OpenAPI support.
This enables **macro-less**, *as consistent as possible* OpenAPI document generation, where most of the consistency between document and behavior is automatically assured by Ohkami's internal work.
Only you have to
- Derive `openapi::Schema` for all your schema structs
- Make your `Ohkami` call `.generate(openapi::OpenAPI { ... })`
to generate consistent OpenAPI document.
You don't need to take care of writing accurate methods, paths, parameters, contents, ... for this OpenAPI feature; All they are done by Ohkami.
Of course, you can flexibly
- customize schemas by manual implemetation of `Schema` trait
- customize descriptions or other parts by `#[operation]` attribute and `openapi_*` hooks of `FromRequest`, `IntoResponse`, `Fang (Action)`
- put `tag`s for grouping operations by `openapi::Tag` fang
```rust,ignore
use ohkami::{Ohkami, Route};
use ohkami::claw::{Json, status};
use ohkami::openapi;
// Derive `Schema` trait to generate
// the schema of this struct in OpenAPI document.
#[derive(Deserialize, openapi::Schema)]
struct CreateUser<'req> {
name: &'req str,
}
#[derive(Serialize, openapi::Schema)]
// `#[openapi(component)]` to define it as component
// in OpenAPI document.
#[openapi(component)]
struct User {
id: usize,
name: String,
}
async fn create_user(
Json(CreateUser { name }): Json<CreateUser<'_>>
) -> status::Created<Json<User>> {
status::Created(Json(User {
id: 42,
name: name.to_string()
}))
}
// (optionally) Set operationId, summary,
// or override descriptions by `operation` attribute.
#[openapi::operation({
summary: "...",
200: "List of all users",
})]
/// This doc comment is used for the
/// `description` field of OpenAPI document
async fn list_users() -> Json<Vec<User>> {
Json(vec![])
}
#[tokio::main]
async fn main() {
let o = Ohkami::new((
"/users"
.GET(list_users)
.POST(create_user),
));
// This make your Ohkami spit out `openapi.json`
// ( the file name is configurable by `.generate_to` ).
o.generate(openapi::OpenAPI {
title: "Users Server",
version: "0.1.0",
servers: &[
openapi::Server::at("localhost:5000"),
]
});
o.howl("localhost:5000").await;
}
```
- Currently, only JSON is supported as the document format.
- When the binary size matters, you should prepare a feature flag activating `ohkami/openapi` in your package, and put all your codes around `openapi` behind that feature via `#[cfg(feature = ...)]` or `#[cfg_attr(feature = ...)]`.
- In `rt_worker`, `.generate` is not available because `Ohkami` can't have access to your local filesystem by `wasm32` binary on Minifalre. So ohkami provides [a CLI tool](./scripts/workers_openapi.js) to generate document from `#[ohkami::worker] Ohkami` with `openapi` feature.
### `"tls"`
HTTPS support up on [rustls](https://github.com/rustls) ecosystem.
- Call `howls` ( as `https` to `http`, `wss` to `ws` ) instead of `howl` to run with TLS.
- You must prepare your own certificate and private key files.
- Currently, only HTTP/1.1 over TLS is supported.
Example :
```sh
$ openssl req -x509 -newkey rsa:4096 -nodes -keyout server.key -out server.crt -days 365 -subj "/CN=localhost"
```
```toml
[dependencies]
ohkami = { version = "0.24", features = ["rt_tokio", "tls"] }
tokio = { version = "1", features = ["full"] }
rustls = { version = "0.23", features = ["ring"] }
rustls-pemfile = "2.2"
```
```rust,no_run
use ohkami::{Ohkami, Route};
use rustls::ServerConfig;
use rustls::pki_types::{CertificateDer, PrivateKeyDer};
use std::fs::File;
use std::io::BufReader;
async fn hello() -> &'static str {
"Hello, secure ohkami!"
}
#[tokio::main]
async fn main() -> std::io::Result<()> {
// Initialize rustls crypto provider
rustls::crypto::ring::default_provider().install_default()
.expect("Failed to install rustls crypto provider");
// Load certificates and private key
let cert_file = File::open("server.crt")?;
let key_file = File::open("server.key")?;
let cert_chain = rustls_pemfile::certs(&mut BufReader::new(cert_file))
.map(|cd| cd.map(CertificateDer::from))
.collect::<Result<Vec<_>, _>>()?;
let key = rustls_pemfile::read_one(&mut BufReader::new(key_file))?
.map(|p| match p {
rustls_pemfile::Item::Pkcs1Key(k) => PrivateKeyDer::Pkcs1(k),
rustls_pemfile::Item::Pkcs8Key(k) => PrivateKeyDer::Pkcs8(k),
_ => panic!("Unexpected private key type"),
})
.expect("Failed to read private key");
// Build TLS configuration
let tls_config = ServerConfig::builder()
.with_no_client_auth()
.with_single_cert(cert_chain, key)
.expect("Failed to build TLS configuration");
// Create and run Ohkami with HTTPS
Ohkami::new((
"/".GET(hello),
)).howls("0.0.0.0:8443", tls_config).await;
Ok(())
}
```
```sh
$ cargo run
```
```sh
$ curl https://localhost:8443 --insecure # for self-signed certificate
Hello, secure ohkami!
```
For localhost-testing with browser (or `curl` without `--insecure`),
[`mkcert`](https://github.com/FiloSottile/mkcert) is highly recommended.
### `"nightly"` : nightly-only functionalities
- try response
- internal performance optimizations
<br>
## Snippets
### Typed content
```rust
use ohkami::claw::{Json, status};
use ohkami::serde::{Deserialize, Serialize};
/* Deserialize for request */
#[derive(Deserialize)]
struct CreateUserRequest<'req> {
name: &'req str,
password: &'req str,
}
/* Serialize for response */
#[derive(Serialize)]
struct User {
name: String,
}
async fn create_user(
Json(req): Json<CreateUserRequest<'_>>
) -> status::Created<Json<User>> {
status::Created(Json(
User {
name: String::from(req.name)
}
))
}
```
### Typed params
```rust,no_run
use ohkami::{Ohkami, Route};
use ohkami::claw::{Path, Query, Json};
use ohkami::serde::{Deserialize, Serialize};
#[tokio::main]
async fn main() {
Ohkami::new((
"/hello/:name/:n"
.GET(hello_n),
"/hello/:name"
.GET(hello),
"/search"
.GET(search),
)).howl("localhost:5000").await
}
async fn hello(Path(name): Path<&str>) -> String {
format!("Hello, {name}!")
}
async fn hello_n(
Path((name, n)): Path<(&str, usize)>
) -> String {
vec![format!("Hello, {name}!"); n].join(" ")
}
#[derive(Deserialize)]
struct SearchQuery<'q> {
#[serde(rename = "q")]
keyword: &'q str,
lang: &'q str,
}
#[derive(Serialize)]
struct SearchResult {
title: String,
}
async fn search(
Query(query): Query<SearchQuery<'_>>
) -> Json<Vec<SearchResult>> {
Json(vec![
SearchResult { title: String::from("ohkami") },
])
}
```
### Middlewares
```rust,no_run
use ohkami::{Ohkami, Route, FangAction, Request, Response};
#[derive(Clone)]
struct GreetingFang(usize);
/* utility trait; automatically impl `Fang` trait */
impl FangAction for GreetingFang {
async fn fore<'a>(&'a self, req: &'a mut Request) -> Result<(), Response> {
let Self(id) = self;
println!("[{id}] Welcome request!: {req:?}");
Ok(())
}
async fn back<'a>(&'a self, res: &'a mut Response) {
let Self(id) = self;
println!("[{id}] Go, response!: {res:?}");
}
}
#[tokio::main]
async fn main() {
Ohkami::new((
// register *global fangs* to an Ohkami
GreetingFang(1),
"/hello"
.GET(|| async {"Hello, fangs!"})
.POST((
// register *local fangs* to a handler
GreetingFang(2),
|| async {"I'm `POST /hello`!"}
))
)).howl("localhost:3000").await
}
```
### Database connection management with `Context` fang
```rust,no_run
use ohkami::{Ohkami, Route};
use ohkami::claw::status;
use ohkami::fang::Context;
use sqlx::postgres::{PgPoolOptions, PgPool};
#[tokio::main]
async fn main() {
let pool = PgPoolOptions::new()
.connect("postgres://ohkami:password@localhost:5432/db").await
.expect("failed to connect");
Ohkami::new((
Context::new(pool),
"/users".POST(create_user),
)).howl("localhost:5050").await
}
async fn create_user(
Context(pool): Context<'_, PgPool>,
) -> status::Created {
//...
status::Created(())
}
```
### Typed errors
```rust,no_run
use ohkami::{Response, IntoResponse};
use ohkami::claw::{Path, Json};
use ohkami::serde::Serialize;
use ohkami::fang::Context;
enum MyError {
Sqlx(sqlx::Error),
}
impl IntoResponse for MyError {
fn into_response(self) -> Response {
match self {
Self::Sqlx(e) => Response::InternalServerError(),
}
}
}
#[derive(Serialize)]
struct User {
id: u32,
name: String,
}
async fn get_user(
Path(id): Path<u32>,
Context(pool): Context<'_, sqlx::PgPool>,
) -> Result<Json<User>, MyError> {
let sql = r#"
SELECT name FROM users WHERE id = $1
"#;
let name = sqlx::query_scalar::<_, String>(sql)
.bind(id as i64)
.fetch_one(pool)
.await
.map_err(MyError::Sqlx)?;
Ok(Json(User { id, name }))
}
```
[thiserror](https://crates.io/crates/thiserror) may improve such error conversion:
```rust,ignore
let name = sqlx::query_salor_as::<_, String>(sql)
.bind(id)
.fetch_one(pool)
// .await
// .map_err(MyError::Sqlx)?;
.await?;
```
### Static directory serving
```rust,no_run
use ohkami::{Ohkami, Route};
#[tokio::main]
async fn main() {
Ohkami::new((
"/".Mount("./dist"),
)).howl("0.0.0.0:3030").await
}
```
### File upload
`Multipart` built-in claw and `File` helper:
```rust,no_run
use ohkami::claw::{status, content::{Multipart, File}};
use ohkami::serde::Deserialize;
#[derive(Deserialize)]
struct FormData<'req> {
#[serde(rename = "account-name")]
account_name: Option<&'req str>,
pics: Vec<File<'req>>,
}
async fn post_submit(
Multipart(data): Multipart<FormData<'_>>
) -> status::NoContent {
println!("\n\
===== submit =====\n\
[account name] {:?}\n\
[ pictures ] {} files (mime: [{}])\n\
==================",
data.account_name,
data.pics.len(),
data.pics.iter().map(|f| f.mimetype).collect::<Vec<_>>().join(", "),
);
status::NoContent
}
```
### Pack of Ohkamis
```rust,no_run
use ohkami::{Ohkami, Route};
use ohkami::claw::{Json, status};
use serde::Serialize;
#[derive(Serialize)]
struct User {
name: String
}
async fn list_users() -> Json<Vec<User>> {
Json(vec![
User { name: String::from("actix") },
User { name: String::from("axum") },
User { name: String::from("ohkami") },
])
}
async fn create_user() -> status::Created<Json<User>> {
status::Created(Json(User {
name: String::from("ohkami web framework")
}))
}
async fn health_check() -> status::NoContent {
status::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
}
```
### Testing
```rust
use ohkami::{Ohkami, Route};
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!"));
}
```
### DI by generics
```rust,no_run
use ohkami::{Ohkami, Route, Response, IntoResponse};
use ohkami::claw::{Json, Path};
use ohkami::fang::Context;
use ohkami::serde::Serialize;
//////////////////////////////////////////////////////////////////////
/// errors
enum MyError {
Sqlx(sqlx::Error),
}
impl IntoResponse for MyError {
fn into_response(self) -> Response {
match self {
Self::Sqlx(e) => Response::InternalServerError(),
}
}
}
//////////////////////////////////////////////////////////////////////
/// repository
trait UserRepository: Send + Sync + 'static {
fn get_user_by_id(
&self,
id: i64,
) -> impl Future<Output = Result<UserRow, MyError>> + Send;
}
#[derive(sqlx::FromRow)]
struct UserRow {
id: i64,
name: String,
}
#[derive(Clone)]
struct PostgresUserRepository(sqlx::PgPool);
impl UserRepository for PostgresUserRepository {
async fn get_user_by_id(&self, id: i64) -> Result<UserRow, MyError> {
let sql = r#"
SELECT id, name FROM users WHERE id = $1
"#;
sqlx::query_as::<_, UserRow>(sql)
.bind(id)
.fetch_one(&self.0)
.await
.map_err(MyError::Sqlx)
}
}
//////////////////////////////////////////////////////////////////////
/// routes
#[derive(Serialize)]
struct User {
id: u32,
name: String,
}
async fn get_user<R: UserRepository>(
Path(id): Path<u32>,
Context(r): Context<'_, R>,
) -> Result<Json<User>, MyError> {
let user_row = r.get_user_by_id(id as i64).await?;
Ok(Json(User {
id: user_row.id as u32,
name: user_row.name,
}))
}
fn users_ohkami<R: UserRepository>() -> Ohkami {
Ohkami::new((
"/:id".GET(get_user::<R>),
))
}
//////////////////////////////////////////////////////////////////////
/// entry point
#[tokio::main]
async fn main() {
let pool = sqlx::PgPool::connect("postgres://ohkami:password@localhost:5432/db")
.await
.expect("failed to connect to database");
Ohkami::new((
Context::new(PostgresUserRepository(pool)),
"/users".By(users_ohkami::<PostgresUserRepository>()),
)).howl("0.0.0.0:4040").await
}
```
<br>
## Supported protocols
- [x] HTTP/1.1
- [ ] HTTP/2
- [ ] HTTP/3
- [x] HTTPS
- [x] Server-Sent Events
- [x] WebSocket
## MSRV ( Minimum Supported Rust Version )
Latest stable
## License
Ohkami is licensed under MIT LICENSE ( [LICENSE](https://github.com/ohkami-rs/ohkami/blob/main/LICENSE) or [https://opensource.org/licenses/MIT](https://opensource.org/licenses/MIT) ).