Question

我使用此代码从url：

下载字符串html

HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(currentUrl);
httpWebRequest.KeepAlive = true;
httpWebRequest.Timeout = 3600000;
httpWebRequest.UserAgent = "Mozilla / 5.0(Windows NT 6.1; WOW64; rv: 30.0) Gecko / 20100101 Firefox / 30.0";
HttpWebResponse httpWebResponse = httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
StreamReader streamReader = new StreamReader(httpWebResponse.GetResponseStream());
currenturlContent = streamReader.ReadToEnd();

我运行循环从一个网站的许多网址获取HTML。我认为问题是网站安全。它可以在第一次读取html然后出错。

错误是：

基础连接已关闭：接收时发生意外错误。

Answer 1

这是我的循环 while（currentPage＆lt; = toPage） { 尝试 { lbCurrentPage.Text = currentPage.ToString（）; currentUrl = createUrlUser（keyword，currentPage）; ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;

                        HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(currentUrl);
                        httpWebRequest.KeepAlive = true;
                        httpWebRequest.Timeout = 3600000;
                        httpWebRequest.UserAgent = "Mozilla / 5.0(Windows NT 6.1; WOW64; rv: 30.0) Gecko / 20100101 Firefox / 30.0";
                        HttpWebResponse httpWebResponse = httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
                        StreamReader streamReader = new StreamReader(httpWebResponse.GetResponseStream());
                        currenturlContent = streamReader.ReadToEnd();
                    }


                }

Answer 2

使用后，您应该尝试关闭streamReader：streamReader.Close();

请看这个链接：

https://www.telerik.com/blogs/help!-running-fiddler-fixes-my-app-

...问题总是证明开发人员调用GetResponseStream()方法但后来未能在生成的对象上调用Close()。结果是.NET使对象无限期地保持活动状态，这会导致后续请求最终阻塞默认的每主机连接限制

底层连接已关闭：接收时发生意外错误。从Url下载Html代码

2 个答案: