Http 尝试自动重定向的次数太多

[飘雪831101]

通过程序访问一个网页，提示“尝试自动重定向的次数太多”。
已经设置了：AllowAutoRedirect=true;MaximumAutomaticRedirections = 50;

通过工具查看，该地址重定向了5次。但我已经设置最大的转向数了，为什么还是不行呢？

[孤零落叶寒]

这问题我也遇到过，重定向3次就报这个错误了，具体怎么设置我不知道，我直接判断返回状态，如果是302，那么递归下就ok了

[孟子E章]

会报告“重定向次数过多”或者“Too many automatic redirections were attempted”的错误：
C# 代码

String url="http://www.google.com.hk/search?hl=zh-CN&q=孟宪会";
System.Net.HttpWebRequest r = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(url);
r.AllowAutoRedirect = true;
//System.Net.CookieContainer c = new System.Net.CookieContainer();
//r.CookieContainer = c;
System.Net.HttpWebResponse res = r.GetResponse() as System.Net.HttpWebResponse;
System.IO.StreamReader s = new System.IO.StreamReader(res.GetResponseStream(),System.Text.Encoding.GetEncoding("GB2312"));
Response.Write(s.ReadToEnd());
res.Close();

解决方法就是加上CookieContainer，完整的代码：
C# 代码

String url="http://www.google.com.hk/search?hl=zh-CN&q=孟宪会";
System.Net.HttpWebRequest r = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(url);
r.AllowAutoRedirect = true;
System.Net.CookieContainer c = new System.Net.CookieContainer();
r.CookieContainer = c;
System.Net.HttpWebResponse res = r.GetResponse() as System.Net.HttpWebResponse;
System.IO.StreamReader s = new System.IO.StreamReader(res.GetResponseStream(),System.Text.Encoding.GetEncoding("GB2312"));
Response.Write(s.ReadToEnd());
res.Close();

[xier_ji]

楼上孟老大正解

[wu1308156206]

引用 2 楼 net_lover 的回复:

会报告“重定向次数过多”或者“Too many automatic redirections were attempted”的错误： C# 代码

String url="http://www.google.com.hk/search?hl=zh-CN&q=孟宪会";
System.Net.HttpWebRequest r = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(url);
r.AllowAutoRedirect = true;
//System.Net.CookieContainer c = new System.Net.CookieContainer();
//r.CookieContainer = c;
System.Net.HttpWebResponse res = r.GetResponse() as System.Net.HttpWebResponse;
System.IO.StreamReader s = new System.IO.StreamReader(res.GetResponseStream(),System.Text.Encoding.GetEncoding("GB2312"));
Response.Write(s.ReadToEnd());
res.Close();

解决方法就是加上CookieContainer，完整的代码： C# 代码

String url="http://www.google.com.hk/search?hl=zh-CN&q=孟宪会";
System.Net.HttpWebRequest r = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(url);
r.AllowAutoRedirect = true;
System.Net.CookieContainer c = new System.Net.CookieContainer();
r.CookieContainer = c;
System.Net.HttpWebResponse res = r.GetResponse() as System.Net.HttpWebResponse;
System.IO.StreamReader s = new System.IO.StreamReader(res.GetResponseStream(),System.Text.Encoding.GetEncoding("GB2312"));
Response.Write(s.ReadToEnd());
res.Close();

这样得不到最终页面的内容 得到的是第一次请求的页面的内容 何解？？

[谁在墙外等红杏]

引用 1 楼 flyer_ren 的回复:

这问题我也遇到过，重定向3次就报这个错误了，具体怎么设置我不知道，我直接判断返回状态，如果是302，那么递归下就ok了

求个demo代码看看，谢谢！

[谁在墙外等红杏]

引用 2 楼 net_lover 的回复:

会报告“重定向次数过多”或者“Too many automatic redirections were attempted”的错误： C# 代码

String url="http://www.google.com.hk/search?hl=zh-CN&q=孟宪会";
System.Net.HttpWebRequest r = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(url);
r.AllowAutoRedirect = true;
//System.Net.CookieContainer c = new System.Net.CookieContainer();
//r.CookieContainer = c;
System.Net.HttpWebResponse res = r.GetResponse() as System.Net.HttpWebResponse;
System.IO.StreamReader s = new System.IO.StreamReader(res.GetResponseStream(),System.Text.Encoding.GetEncoding("GB2312"));
Response.Write(s.ReadToEnd());
res.Close();

解决方法就是加上CookieContainer，完整的代码： C# 代码

String url="http://www.google.com.hk/search?hl=zh-CN&q=孟宪会";
System.Net.HttpWebRequest r = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(url);
r.AllowAutoRedirect = true;
System.Net.CookieContainer c = new System.Net.CookieContainer();
r.CookieContainer = c;
System.Net.HttpWebResponse res = r.GetResponse() as System.Net.HttpWebResponse;
System.IO.StreamReader s = new System.IO.StreamReader(res.GetResponseStream(),System.Text.Encoding.GetEncoding("GB2312"));
Response.Write(s.ReadToEnd());
res.Close();

您这个在需要登录后才能操作的页面就不行，会刷掉之前的cookie...