I’m facing issues with CORS preflight requests in my Flutter web integration tests. Here’s a summary of my setup and the problem:

Setup:

1. Flutter Web Integration Tests: Using flutter drive.
2. Backend APIs: External APIs used for testing.
3. Local Proxy Server: Using Express.js to handle CORS and proxy requests.

Problem:

When running tests on Flutter web, CORS preflight requests (OPTIONS) are triggered for my API calls, causing issues. These preflight requests don’t occur on Android and iOS.

What I Have Tried:

1. Proxy Server: Configured to handle CORS and forward requests to the actual APIs.
2. Chrome Configuration: Ran Chrome with web security disabled for testing.

Question:

Is there a better way to handle or avoid CORS preflight requests in this setup? Any tips on configuring the proxy or Flutter tests to bypass these preflight requests?

Thanks in advance!