How do I resolve CORS and Terraform deployment issues with API Gateway?

Context When deploying API Gateway configurations through Terraform, you may encounter two common issues: CORS errors due to case-sensitive header configurations API Gateway changes not taking effect after Terraform apply Answer To resolve CORS-related issues: Ensure header names in your API Gateway configuration match exactly the case expected by the client. For example, use 'x-tenant-id' instead of 'X-Tenant-Id'. Include all required headers in your CORS configuration. Common headers include: Content-Type,X-Amz-Date,Authorization,X-Api-Key,X-Client-Id,X-Amz-Security-Token,X-Csrf-Token,x-tenant-id,x-csrf-token If API Gateway changes are not taking effect after Terraform apply: A manual redeployment of the API Gateway stage may be necessary to propagate the changes. To manually redeploy: Go to the AWS Console Navigate to API Gateway Select your API Choose the stage that needs updating Click "Deploy API" Note: While manual redeployment can resolve immediate issues, consider updating your Terraform configuration to include automatic redeployment of the API Gateway stage after configuration changes.