跨域中间件

跨域中间件

原生写法

use hyperlane::*;

struct CrossMiddleware;
struct IndexRoute;
struct ResponseMiddleware;

impl ServerHook for CrossMiddleware {
    async fn new(_: &mut Stream, _: &mut Context) -> Self {
        Self
    }

    async fn handle(self, _: &mut Stream, ctx: &mut Context) -> Status {
        ctx.get_mut_response()
            .set_version(HttpVersion::Http1_1)
            .set_header(ACCESS_CONTROL_ALLOW_ORIGIN, WILDCARD_ANY)
            .set_header(ACCESS_CONTROL_ALLOW_METHODS, ALL_METHODS)
            .set_header(ACCESS_CONTROL_ALLOW_HEADERS, WILDCARD_ANY);
        Status::Continue
    }
}

impl ServerHook for IndexRoute {
    async fn new(_: &mut Stream, _: &mut Context) -> Self {
        Self
    }

    async fn handle(self, _: &mut Stream, ctx: &mut Context) -> Status {
        ctx.get_mut_response()
            .set_status_code(200)
            .set_body("Hello, world!");
        Status::Continue
    }
}

impl ServerHook for ResponseMiddleware {
    async fn new(_: &mut Stream, _: &mut Context) -> Self {
        Self
    }

    async fn handle(self, stream: &mut Stream, ctx: &mut Context) -> Status {
        if ctx.get_request().is_ws_upgrade_type() {
            return Status::Continue;
        }
        let data: Vec<u8> = ctx.get_mut_response().build();
        if stream.try_send(data).await.is_err() {
            stream.set_closed(true);
            return Status::Reject;
        }
        Status::Continue
    }
}

#[tokio::main]
async fn main() {
    let mut server: Server = Server::default();
    server
        .request_middleware::<CrossMiddleware>()
        .response_middleware::<ResponseMiddleware>()
        .route::<IndexRoute>("/");
    let server_control_hook: ServerControlHook = server.run().await.unwrap_or_default();
    server_control_hook.wait().await;
}

属性宏写法

use hyperlane::*;
use hyperlane_utils::*;

#[request_middleware(1)]
struct CrossMiddleware;
#[route("/")]
struct IndexRoute;
#[response_middleware(1)]
struct ResponseMiddleware;

impl ServerHook for CrossMiddleware {
    async fn new(_: &mut Stream, _: &mut Context) -> Self {
        Self
    }

    #[response_version(HttpVersion::Http1_1)]
    #[response_header(ACCESS_CONTROL_ALLOW_ORIGIN => WILDCARD_ANY)]
    #[response_header(ACCESS_CONTROL_ALLOW_METHODS => ALL_METHODS)]
    #[response_header(ACCESS_CONTROL_ALLOW_HEADERS => WILDCARD_ANY)]
    async fn handle(self, _: &mut Stream, _: &mut Context) -> Status {
        Status::Continue
    }
}

impl ServerHook for IndexRoute {
    async fn new(_: &mut Stream, _: &mut Context) -> Self {
        Self
    }

    #[response_status_code(200)]
    #[response_body("Hello, world!")]
    async fn handle(self, _: &mut Stream, _: &mut Context) -> Status {
        Status::Continue
    }
}

impl ServerHook for ResponseMiddleware {
    async fn new(_: &mut Stream, _: &mut Context) -> Self {
        Self
    }

    #[send]
    async fn handle(self, _: &mut Stream, _: &mut Context) -> Status {
        Status::Continue
    }
}

#[tokio::main]
async fn main() {
    let server_control_hook: ServerControlHook = Server::default().run().await.unwrap_or_default();
    server_control_hook.wait().await;
}

加载中...