System.Net.HttpWebResponse.GetResponseStream（）在WebException中返回截断主体

由于某些原因，我无法理解对某个特定网站（https://learningnetwork.cisco.com/people/mrollins?view=profile）的请求，从而产生响应流包含网站的主干版本的请求响应对象。System.Net.HttpWebResponse.GetResponseStream（）在WebException中返回截断主体

流在65536字节后结束，等于2^16字节。我认为这是一个可疑的数字。这些请求会抱怨内部服务器错误，这是我压制的原因，因为我已经验证了webbrowser能够理解此响应，并且完整的html包含在服务器的响应中。（使用fiddler）

我发现以前记录here的问题，这是不能令人满意的，原因很简单，它在这张票据结束：

“我想我得希望错误不超过65536个字符...“

那好吧。

解决方法赞赏，或者如果有人知道一个upcomming修复也是好的。

using System; 
using System.IO; 
using System.Net; 
using System.Web.UI; 

namespace Example 
{ 
    public partial class _Default : Page 
    { 
     protected void Page_Load(object senderHidden, EventArgs eHidden) 
     { 
      //ServicePointManager.ServerCertificateValidationCallback += delegate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors) { return true; }; 
      var cookieContainer = new CookieContainer(); 
      //Encoding enc = Encoding.UTF8; 
      HttpWebRequest req = (HttpWebRequest)WebRequest.Create("https://learningnetwork.cisco.com/people/mrollins?view=profile"); 
      req.AllowAutoRedirect = false; 

      req.AutomaticDecompression = DecompressionMethods.Deflate | DecompressionMethods.GZip; 
      req.CookieContainer = cookieContainer; 
      req.Accept = "text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5"; 
      req.Method = "GET"; 
      req.UserAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; ru; rv:1.8.1.12) Gecko/20080201 Firefox/2.0.0.12"; 
      req.KeepAlive = true; 

      HttpWebResponse resp = null; 
      try 
      { 
       resp = (HttpWebResponse)req.GetResponse(); 
      } 
      catch (WebException e) 
      { 
       var r = e.Response as HttpWebResponse; 
       var memstream = Read(r.GetResponseStream()); 
       var wrongLength = memstream.Length; 
      } 
     } 

     public static MemoryStream Read(Stream stream) 
     { 
      MemoryStream memStream = new MemoryStream(); 

      byte[] readBuffer = new byte[4096]; 
      int bytesRead; 
      while ((bytesRead = stream.Read(readBuffer, 0, readBuffer.Length)) > 0) 
       memStream.Write(readBuffer, 0, bytesRead); 
      return memStream; 
     } 
    } 
}

来源

2011-02-07 Tor

我应该包括一些关于代码的评论。这是一个简单的程序，我已经能够做出，这仍然表明了问题。要查看问题，请在catch子句末尾放置一个断点，并观察只读取了2^16个字节。（错误长度= 65536） – Tor 2011-02-07 09:23:43

HttpWebRequest具有限制Web请求长度的静态属性。在执行请求之前插入的这行代码解决了这个问题。

HttpWebRequest.DefaultMaximumErrorResponseLength = 1048576;

来源

2011-02-07 09:39:51 Tor

System.Net.HttpWebResponse.GetResponseStream（）在WebException中返回截断主体

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