curl_formadd(&post, &last, CURLFORM_COPYNAME, "Token", CURLFORM_COPYCONTENTS, "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz", CURLFORM_END);

curl_formadd(&post, &last, CURLFORM_COPYNAME, "FileID", CURLFORM_COPYCONTENTS, "987654321", CURLFORM_END);

curl_formadd(&post, &last, CURLFORM_COPYNAME, "File",   CURLFORM_FILE, "filename.zip",   CURLFORM_CONTENTTYPE, "application/octet-stream", CURLFORM_END);