How to construct the body and upload the files of multipart/form-data

I am trying to pass the files to the API interface with multipart/form-data. But I am not sure how to construct the body as below:

------WebKitFormBoundaryoeTA5ctzJ87vDL0x Content-Disposition: form-data; name="file"; filename="DefaultCsv.csv" Content-Type: application/vnd.ms-excel

------WebKitFormBoundaryoeTA5ctzJ87vDL0x--

I have written the codes like:

boundary='----WebKitFormBoundary52x5ruT8nrmA8Ek2'; body=sprintf('%s\n%s\n%s\n%s',boundary,'Content-Disposition:form-data;name="file";filename="DefaultCsv.csv"','Content-Type:application/vnd.ms-excel',boundary); body_ = matlab.net.http.MessageBody(body); body_.Payload=body;

But it does not work.

In addition how could I upload the files by this form?

Answer 1

[Henrik Pedersen]

Did you ever solve this issue...?