Attach CORS headers to requests

Proxyflare includes support for cross origin resource sharing (CORS).

Cross-Origin Resource Sharing (CORS) is an HTTP-header based mechanism that allows a server to indicate any origins (domain, scheme, or port) other than its own from which a browser should permit loading resources.

Configuration

Provide your desired settings in the Route["to.cors"] field. Refer to the CORSOptions documentation for more information.

functions/_middleware.ts

const routes = [
  {
    from: { pattern: "proxyflare.works/api/*" },
    to: {
      url: "ec2-5-55-555-55.compute-1.amazonaws.com:8787",
      cors: {
        origin: true,
        methods: "*",
        exposedHeaders: [],
        allowedHeaders: [],
        credentials: true,
        maxAge: 3600,
      },
    },
  },
]

Testing CORS

There are many tools to test your CORS configuration. We recommend codehappy.dev.