Uploading file (non direct) using POST libcurl - file-upload

Question

Hi want to upload one single input.zip file as well as this xml descrition of file to the server.This is xml description part that I want to send in CURLOPT_POSTFIELDS,
<data_file>
<archive>"true"</archive>
<data_type_id> "42f7710d-9399-45d8-a61f-a018bb6c33f6""</data_type_id>
<data_file_name> "INPUT.zip"</data_file_name>
<description>..</description>
<uploaded>true</uploaded>
<job_id> job_id</job_id>
</data_file>
and this is libcurl part. I'm not sure if we can send both POST parameters and Postform in same request.
struct curl_httppost *formpost=NULL;
struct curl_httppost *lastptr=NULL;
struct curl_slist *headers=NULL;
static const char buf[] = "Expect:";
curl_global_init(CURL_GLOBAL_ALL);
/* Fill in the file upload field */
curl_formadd(&formpost,
&lastptr,
CURLFORM_COPYNAME, "sendfile",
CURLFORM_FILE, filepathinput.c_str(),
CURLFORM_END);
/* Fill in the filename field */
curl_formadd(&formpost,
&lastptr,
CURLFORM_COPYNAME, "INPUT.zip",
CURLFORM_COPYCONTENTS, filepathinput.c_str(),
CURLFORM_END);
/* Fill in the submit field too, even if this is rarely needed */
curl_formadd(&formpost,
&lastptr,
CURLFORM_COPYNAME, "submit",
CURLFORM_COPYCONTENTS, "send",
CURLFORM_END);
curl = curl_easy_init();
headers = curl_slist_append(headers, buf);
headers = curl_slist_append(headers, "Content-Type: multipart/form-data");
if(curl) {
curl_easy_setopt(curl, CURLOPT_VERBOSE, true);
curl_easy_setopt(curl, CURLOPT_URL, url);
curl_easy_setopt(curl, CURLOPT_USERPWD,_loginCBstring.c_str());
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
curl_easy_setopt(curl, CURLOPT_HTTPPOST, formpost);
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, xmldescription.c_str());
curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE, strlen(xmldescription.c_str()));
_res = curl_easy_perform(curl);
if(_res != CURLE_OK)
fprintf(stderr, "curl_easy_perform() failed: %s\n",
curl_easy_strerror(_res));
curl_easy_cleanup(curl);
curl_formfree(formpost);
curl_slist_free_all (headers);
}
Thx a lot in advance!