CORS error on textract API

[WrathOP]

When using the AWS Textract API in a browser-based Dart/Flutter application, I encountered CORS errors that prevent direct API calls. The Dart SDK doesn't currently provide a mechanism to handle these CORS restrictions.

Current behavior: Browser blocks requests to AWS Textract with CORS errors when attempting direct API calls.

Expected behavior: SDK should provide some solution or clear documentation for handling CORS issues in browser environments.

Workarounds attempted:

Custom headers (not supported)
Researched AWS documentation (no CORS settings available for Textract)(or I couldn't find any)

Currently forced to implement a server-side proxy, adding unnecessary complexity to
what should be a client-only application.

Please consider adding browser support guidance or features to the SDK to enable more straightforward AWS service calls from Dart web applications.

[Schwusch]

AWS have an example application that sounds like what you are trying to do: https://docs.aws.amazon.com/code-library/latest/ug/cognito-identity_example_cross_TextractExplorer_section.html

[WrathOP]

Hi Schwusch,
Thanks for the response. I have already read through that but it didn't help.

aws-amplify/amplify-flutter#6008

The react and javascript SDKs work fine as they handle all the signing and encoding stuff. The AWS client doesn't do any of that. So I tried emulating the react SDK behaviour but failed I have also opened an issue in the AWS Flutter library (Closest to any official SDK flutter has I assume) If you could figure out what's wrong.