Quick Integration - Supplier Principals

package httpPostExample;

import java.io.File;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.EntityUtils;

public class uploadFile
{
    public static void main(String[] args)
    {
        try
        {
            String url = "https://rportal.hiperos.com/QuickIntegration/SupplierPrincipals";
            String filePath = "c:\\hiperos\\outbox\\SupplierPrincipals_import.xlsx";

            HttpClient httpClient = HttpClientBuilder.create().build();
            HttpContext httpContext = new BasicHttpContext();

            HttpPost httpPost = new HttpPost(url);
            httpPost.setHeader("username", "Your_3PM_Username_Here");
            httpPost.setHeader("password", "Your_3PM_Password_Here");

            httpPost.setHeader("Connection", "close");

            MultipartEntityBuilder builder = MultipartEntityBuilder.create();
            builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);

            final File file = new File(filePath);
            FileBody fb = new FileBody(file, "text/csv");

            builder.addPart("file", fb);

            final HttpEntity entity = builder.build();
            httpPost.setEntity(entity);

            HttpResponse postResponse = httpClient.execute(httpPost, httpContext);

            HttpEntity responseEntity = postResponse.getEntity();
            System.out.println(EntityUtils.toString(responseEntity));
        }
        catch(Exception ex)
        {
            ex.printStackTrace();
        }
    }
}

using System;
using System.Net;

namespace QuickIntegration_Sample
{
    class Program
    {
        static void Main()
        {
            const string uriString = "https://rportal.hiperos.com/QuickIntegration/SupplierPrincipals";
            const string fileName = @"c:\\hiperos\\outbox\\SupplierPrincipals_import.xlsx";

            // Create a new WebClient instance.
            WebClient client = new WebClient();

            // Add authentication headers to request.
            client.Headers.Add("username", "Your_3PM_Username_Here");
            client.Headers.Add("password", "Your_3PM_Password_Here");

            // Upload the file to the URI.
            // The 'UploadFile(uriString,fileName)' method implicitly uses HTTP POST method.
            byte[] responseArray = client.UploadFile(uriString, fileName);

            string response = System.Text.Encoding.ASCII.GetString(responseArray);

            // Decode and display the response.
            Console.WriteLine("\nResponse Received.  The contents of the file uploaded are:\n{0}", response);
        }
    }
}