Flutter – Envoy + grpc: Request header field x-user-agent is not allowed by Access-Control-Allow-Headers in preflight response
I have this issue: Access to XMLHttpRequest at 'https://example.org:8443/main.MyService/Ping' from origin 'https://example.org' has been blocked by CORS policy: Request header field x-user-agent is not allowed by Access-Control-Allow-Headers in preflight response. My envoy: # Admin settings admin: access_log_path: /tmp/admin_access.log address: socket_address:…