Adds CORS middleware for dart_frog server applications.

Features

Responds to OPTIONS requests and injects your CORS headers into your Responses.

Usage

1. Install the package:

dart pub add dart_frog_cors

2. Add the middleware:

import 'package:dart_frog_cors/dart_frog_cors.dart';

Handler middleware(Handler handler) {
  return handler.use(cors());
}

Defaults

The default values include:

• Access-Control-Allow-Origin: *
• Access-Control-Allow-Methods: GET,PUT,POST,PATCH,DELETE,OPTIONS
• Access-Control-Allow-Headers: Origin,X-Requested-With,Content-Type,Accept,Authorization

Overriding defaults

You can easily override the defaults with your own values.

Handler middleware(Handler handler) {
  return handler.use(cors(
    allowOrigin: 'https://your-domain.com',
    allowMethods: 'GET,POST,PUT',
  ));
}

Additional headers

You can also add your own Map<String, String> of headers to be injected using the additional property.

Handler middleware(Handler handler) {
  return handler.use(cors(
    additional: {
      'Some-Key': 'SomeValue',
    },
  ));
}

Additional information

This is based on the original dart_frog_cors package made by Andrew Horn Github Link

This is not an official dart_frog package.

This package was based on this fabulous CORS example for the shelf server: shelf_helpers