I can't define the Content-Type of a field in a MultipartRequest

[stefv]

Using Postman and Spring Web doing REST. I can define in Postman the Content-Type of a field and it's perfectly accepted by the server. But with "http", it's always sent as "text/plain; charset=utf-8" because, it's ASCII.

I would like to set the Content-Type like application/json for my JSON.

Here the problem in http:

String _headerForField(String name, String value) { var header = 'content-disposition: form-data; name="${_browserEncode(name)}"'; if (!isPlainAscii(value)) { header = '$header\r\n' 'content-type: text/plain; charset=utf-8\r\n' 'content-transfer-encoding: binary'; } return '$header\r\n\r\n'; }

[stefv]

I did an evolution with a MultipartField and a MultipartRequestEx. But i'm not sure it's the way used by the Dart team to upgrade the code libraries.