WebClient 객체에 쿠키(Cookie)를 사용하는 방법

.NET의 경우 쿠키를 요청 간에 연속해서 다룰 때 CookieContainer를 이용하면 됩니다. 그런데, 아쉽게도 WebClient 객체는 CookieContainer를 접근할 수 있는 방법을 제공하지 않습니다.

그래도 검색해 보니 답이 나오는 군요. ^^

Using a Cookie-Aware WebClient to Persist Authentication in ASP.NET MVC
; http://rionscode.wordpress.com/2013/07/22/using-a-cookie-aware-webclient-to-persist-authentication-in-asp-net-mvc/

using System;
using System.Net;

class Program
{
    static void Main(string[] args)
    {
        string path = "http://www.naver.com";

        CookieAwareWebClient wc = new CookieAwareWebClient();
        wc.DownloadStringCompleted += (s, e) => 
        {
            Console.WriteLine(e.Result);
        };

        wc.DownloadStringAsync(new Uri(path));

        Console.WriteLine("Exit... ");
        Console.ReadLine();
    }
}

// http://rionscode.wordpress.com/2013/07/22/using-a-cookie-aware-webclient-to-persist-authentication-in-asp-net-mvc/
class CookieAwareWebClient : WebClient
{
    private CookieContainer cc = new CookieContainer();
    private string lastPage;

    protected override WebRequest GetWebRequest(System.Uri address)
    {
        WebRequest R = base.GetWebRequest(address);
        if (R is HttpWebRequest)
        {
            HttpWebRequest WR = (HttpWebRequest)R;
                
            Cookie cookie = new Cookie("TEST", "1");
            cookie.Domain = address.Host;
            cc.Add(cookie);

            WR.CookieContainer = cc;
            if (lastPage != null)
            {
                WR.Referer = lastPage;
            }
        }

        lastPage = address.ToString();
        return R;
    }
}