how to use CORS?

[mimoo]

Is there an existing issue for this?

• I have searched the existing issues

Description

I'm using it this way now but I'd like confirmation that this is the way :)

#[event(fetch)]
pub async fn main(req: Request, env: Env, _ctx: worker::Context) -> Result<Response> {
    log_request(&req);

    // Optionally, get more helpful error messages written to the console in the case of a panic.
    utils::set_panic_hook();

    // CORS
    let cors = Cors::default()
        .with_max_age(86400)
        .with_origins(vec!["*"])
        .with_methods(vec![
            Method::Get,
            Method::Head,
            Method::Post,
            Method::Options,
        ]);

     // TRUNCATED...

    let router = Router::new();

    router
        // TRUNCATED...
        .run(req, env)
        .await?
        .with_cors(&cors)

[film42]

This looks correct and it matches the example in the docs: https://docs.rs/worker/latest/worker/struct.Response.html#method.with_cors

You can always confirm by checking your response headers. Here is where the Cors helper applies headers to the response: https://docs.rs/worker/latest/src/worker/cors.rs.html#86-118

[dakom]

note that you may also have to allow some headers, e.g. .with_allowed_headers(["*"]);