.Net HttpWebRequest获取请求返回WebException

Question

尝试创建两次获取请求。但是第二个请求总是抛出WebException消息：“底层连接已关闭：连接意外关闭。”

下面是代码尖晶石，我用

public string Get(string url) 
    { 
     string strResult = ""; 
     try 
     { 
      HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); 
      request.Method = "GET"; 
      request.CookieContainer = new CookieContainer(); 
      request.UserAgent = this.UserAgent; 
      request.KeepAlive = false; 

      HttpWebResponse response = (HttpWebResponse)request.GetResponse(); 
      Stream stream = response.GetResponseStream(); 
      StreamReader reader = new StreamReader(stream, Encoding.UTF8); 
      strResult = reader.ReadToEnd(); 
      response.Close(); 
     } 
     catch (Exception ex) 
     { 
      //Todo 
     } 
     return strResult; 
    } 

，我要求这url

如果我开始拉琴似乎第二个请求正常的结果。 如果我使用HttpClient类，它似乎也适用。

Answer 1

当你开始小提琴手的时候，请求之间是否存在任何延迟（你是否在中间点击了一个断点）。也许在你的通话之间增加一个快速的Thread.Sleep(250);。

另一个要点是，添加一些使用语句来关闭一次性类。

try { 
    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); 
    request.Method = "GET"; 
    request.CookieContainer = new CookieContainer(); 
    request.UserAgent = this.UserAgent; 
    request.KeepAlive = false; 

    using (HttpWebResponse response = (HttpWebResponse)request.GetResponse()) 
    using (Stream stream = response.GetResponseStream()) 
    using (StreamReader reader = new StreamReader(stream, Encoding.UTF8)) { 
     strResult = reader.ReadToEnd(); 
     response.Close(); 
}