.Net HttpWebRequest獲取請求返回WebException

Question

嘗試創建兩次獲取請求。但是第二個請求總是拋出WebException消息：「底層連接已關閉：連接意外關閉。」

下面是代碼尖晶石，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; 
    } 

，我要求這url

如果我開始拉琴似乎第二個請求正常的結果。 如果我使用HttpClient類，它似乎也適用。

Answer 1

當你開始小提琴手的時候，請求之間是否存在任何延遲（你是否在中間點擊了一個斷點）。也許在你的通話之間增加一個快速的Thread.Sleep(250);。

另一個要點是，添加一些使用語句來關閉一次性類。

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(); 
}