修复代理未设置的问题

Author: 邹嵩

src/DotnetSpider.Core/Downloader/HttpClientDownloader.cs

@@ -126,7 +126,7 @@ protected override async Task<Page> DowloadContent(Request request, ISpider spid
 					httpClientEntry = HttpClientPool.GetHttpClient(proxy.Hash);
 				}
 
-				PrepareHttpClient(httpClientEntry);
+				PrepareHttpClient(httpClientEntry, request.Proxy);
 
 				response = NetworkCenter.Current.Execute("http", () => httpClientEntry.Client.SendAsync(httpMessage).Result);
 				request.StatusCode = response.StatusCode;
@@ -192,14 +192,15 @@ protected virtual string ReadContent(Site site, HttpResponseMessage response)
 			return site.Encoding.GetString(contentBytes, 0, contentBytes.Length);
 		}
 
-		internal void PrepareHttpClient(HttpClientEntry httpClientEntry)
+		internal void PrepareHttpClient(HttpClientEntry httpClientEntry, IWebProxy proxy)
 		{
 			httpClientEntry.Init(AllowAutoRedirect, () =>
 			{
 				if (!Equals(httpClientEntry.Client.Timeout.TotalSeconds, _timeout))
 				{
 					httpClientEntry.Client.Timeout = new TimeSpan(0, 0, (int)_timeout / 1000);
 				}
+				httpClientEntry.Handler.Proxy = proxy;
 			}, CopyCookieContainer);
 		}