Hello world actix-web example with multiple CORS allowed origins

main.rs

extern crate actix_web;
use actix_web::middleware::cors::Cors;
use actix_web::{server, App, HttpRequest};

fn index(_req: &HttpRequest) -> &'static str {
    "Hello world!"
}

fn main() {
    server::new(|| {
        App::new()
            .middleware(
                Cors::build()
                    .allowed_origin("http://localhost")
                    .allowed_origin("http://localhost:5200")
                    .finish(),
            )
            .resource("/", |r| r.f(index))
    })
    .bind("127.0.0.1:8088")
    .unwrap()
    .run();
}

openapi.yaml

openapi: 3.0.0
info:
  version: "1.0.0"

  title: Hello World

  description: |
    Demonstratining CORS preflight defect via Swagger UI

  contact:
    name: Joylabs Engineering Group
    email: engineering@joylabs.com

servers:
  - url: "http://localhost:8088"

paths:
  /:
    post:
      summary: print "Hello, World!"
      requestBody:
        description: A salution to the server
        content:
          application/text:
            schema:
              type: string
      responses:
        "200":
          description: Success
          content:
            application/text:
              schema:
                type: string