using CsharpHttpHelper.Base;
using CsharpHttpHelper.Enum;
using CsharpHttpHelper.Helper;
using System.Drawing;

namespace CsharpHttpHelper.BaseBll
{
	/// <summary>
	/// 具体实现方法  Copyright：http://www.httphelper.com/
	/// </summary>
	internal class HttpHelperBll
	{
		/// <summary>
		/// Httphelper原始访问类对象
		/// </summary>
		private HttphelperBase httpbase = new HttphelperBase();

		/// <summary>
		/// 根据相传入的数据，得到相应页面数据
		/// </summary>
		/// <param name="item">参数类对象</param>
		/// <returns>返回HttpResult类型</returns>
		internal HttpResult GetHtml(HttpItem item)
		{
			if (item.Allowautoredirect && item.AutoRedirectCookie)
			{
				HttpResult httpResult = null;
				for (int i = 0; i < 100; i++)
				{
					item.Allowautoredirect = false;
					httpResult = httpbase.GetHtml(item);
					if (string.IsNullOrWhiteSpace(httpResult.RedirectUrl))
					{
						break;
					}
					item.URL = httpResult.RedirectUrl;
					item.Method = "GET";
					if (item.ResultCookieType == ResultCookieType.String)
					{
						item.Cookie += httpResult.Cookie;
					}
					else
					{
						item.CookieCollection.Add(httpResult.CookieCollection);
					}
				}
				return httpResult;
			}
			return httpbase.GetHtml(item);
		}

		/// <summary>
		/// 根据Url获取图片
		/// </summary>
		/// <param name="item">参数类对象</param>
		/// <returns>返回图片</returns>
		internal Image GetImage(HttpItem item)
		{
			item.ResultType = ResultType.Byte;
			return ImageHelper.ByteToImage(GetHtml(item).ResultByte);
		}

		/// <summary>
		/// 快速Post数据这个访求与GetHtml一样，只是不接收返回数据，只做提交。
		/// </summary>
		/// <param name="item">参数类对象</param>
		/// <returns>返回HttpResult类型</returns>
		internal HttpResult FastRequest(HttpItem item)
		{
			return httpbase.FastRequest(item);
		}
	}
}