pass json list as header parameter of Dio Post method in Flutter/Dart

Question

I want to send the list of cart items like this in the header parameter of Dio post method in FLutter/Dart.

https://www.example.com?cart=[{"product_id": "8", "category_id": "19", "shop_id": "11", "shop_name": "shopName", "quantity": "2", "descriptions": "test"}]

but the dio converts each fields into something like cart[0][product_id]=8

https://www.example.com?cart[0][product_id]=8&cart[0][category_id]=19&cart[0][shop_id]=11&cart[0][shop_name]=shopName&cart[0][quantity]=2&cart[0][descriptions]=test

question from:https://stackoverflow.com/questions/65617454/pass-json-list-as-header-parameter-of-dio-post-method-in-flutter-dart

Answer 1

Waitting for answers