通过URL获取浏览器Cookie

通过URL获取浏览器Cookie

[DllImport("wininet.dll", SetLastError = true)]
public static extern bool InternetGetCookieEx(
    string url,
    string cookieName,
    StringBuilder cookieData,
    ref int size,
    Int32 dwFlags,
    IntPtr lpReserved);

private const Int32 InternetCookieHttponly = 0x2000;

/// <summary>
/// Gets the URI cookie container.
/// </summary>
/// <param name="uri">The URI.</param>
/// <returns></returns>
private static CookieContainer GetUriCookieContainer(Uri uri)
{
    CookieContainer cookies = null;
    // Determine the size of the cookie
    int datasize = 8192 * 16;
    StringBuilder cookieData = new StringBuilder(datasize);
    if (!InternetGetCookieEx(uri.ToString(), null, cookieData, ref datasize, InternetCookieHttponly, IntPtr.Zero))
    {
        if (datasize < 0)
            return null;
        // Allocate stringbuilder large enough to hold the cookie
        cookieData = new StringBuilder(datasize);
        if (!InternetGetCookieEx(
            uri.ToString(),
            null, cookieData,
            ref datasize,
            InternetCookieHttponly,
            IntPtr.Zero))
            return null;
    }
    if (cookieData.Length > 0)
    {
        cookies = new CookieContainer();
        cookies.SetCookies(uri, cookieData.ToString().Replace(';', ','));
    }
    return cookies;
}