如何在Actix中显示自定义Tera错误？

enum CustomError {
    TeraError(tera::Error),
    // 其他自定义错误类型
}

async fn index(req: HttpRequest) -> Result<HttpResponse, CustomError> {
    let tera = Tera::new("templates/**/*")?;
    let rendered = tera.render("index.html", &context)?;

    Ok(HttpResponse::Ok().body(rendered))
}

impl ResponseError for CustomError {
    fn error_response(&self) -> HttpResponse {
        match self {
            CustomError::TeraError(_) => {
                // 返回自定义的错误页面或错误信息
                HttpResponse::InternalServerError().body("Internal Server Error")
            }
            // 处理其他自定义错误类型
        }
    }
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    HttpServer::new(|| {
        App::new()
            .wrap(ErrorHandlers::new().handler(CustomError::error_response))
            .service(web::resource("/").route(web::get().to(index)))
    })
    .bind("127.0.0.1:8080")?
    .run()
    .await
}