- HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(address);
- HttpWebRequest response = (HttpWebRequest)request.GetResponse();
- Stream sm = response.GetResponseStream();
上面代码在访问一些网站时正常,但有一些却出错:
Too many automatic redirections were attempted
解决方法是加上一条语句,如下所示:
- HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(address);
- request.CookieContainer = new CookieContainer();
- HttpWebRequest response = (HttpWebRequest)request.GetResponse();
- Stream sm = response.GetResponseStream();
分析过程:
用IE访问”出错“网站,一切正常。这说明出错的应该是我的程序。
如果在request初始化后加入下面语句
- reqest.AllowAutoRedirect = false;
虽然request.GetResponse()正常返回,但是request.状态却是FOUND。
用WireShark抓包,分析IE与程序的数据包区别,发现在第2、3次跳转时IE多了Cookie。所以怀疑和它有关。
所以加上上面语句解决了问题。
本文转自 h2appy 51CTO博客,原文链接:http://blog.51cto.com/h2appy/285483,如需转载请自行联系原作者