HttpWebRequest的GetResponse 方法注意事项_httpwebresponse response = (httpwebresponse)reques

作者：你好赵伟 | 2024-03-18 01:56:51

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httpwebresponse response = (httpwebresponse)request.getresponse();

HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(StrUrl);

HttpWebResponse response = (HttpWebResponse)request.GetResponse();

。。。

response.Close();

处理完毕后需要执行关闭，否则下次操作时报出异常。

以下摘录于MSDN

备注

GetResponse 方法返回包含来自 Internet 资源的响应的 WebResponse 对象。实际返回的实例是 HttpWebResponse，并且能够转换为访问 HTTP 特定的属性的类。

警告
必须调用 Close 方法关闭该流并释放连接。如果未能做到这一点，可能导致应用程序用完连接。

使用 POST 方法时，必须获取请求流，写入要发送的数据，然后关闭请求流。此方法阻塞以等待发送的内容；如果没有超时设置并且您没有提供内容，调用线程将无限期地阻塞。

注意
多次调用 GetResponse 会返回相同的响应对象；该请求不会重新发出。

注意
应用程序不能对特定请求混合使用同步和异步方法。如果调用 GetRequestStream 方法，则必须使用 GetResponse 方法检索响应。

注意
如果引发 WebException，请使用该异常的 Response 和 Status 属性确定服务器的响应。

注意
当在应用程序中启用网络跟踪功能后，此成员将输出跟踪信息。有关更多信息，请参见网络跟踪。

注意
为安全起见，默认情况下禁用 Cookie。如果您希望使用 Cookie，请使用 CookieContainer 属性启用 Cookie。 using System; using System.Net; using System.Text; using System.IO; public class Test { // Specify the URL to receive the request. public static void Main (string[] args) { HttpWebRequest request = (HttpWebRequest)WebRequest.Create (args[0]); // Set some reasonable limits on resources used by this request request.MaximumAutomaticRedirections = 4; request.MaximumResponseHeadersLength = 4; // Set credentials to use for this request. request.Credentials = CredentialCache.DefaultCredentials; HttpWebResponse response = (HttpWebResponse)request.GetResponse (); Console.WriteLine ("Content length is {0}", response.ContentLength); Console.WriteLine ("Content type is {0}", response.ContentType); // Get the stream associated with the response. Stream receiveStream = response.GetResponseStream (); // Pipes the stream to a higher level stream reader with the required encoding format. StreamReader readStream = new StreamReader (receiveStream, Encoding.UTF8); Console.WriteLine ("Response stream received."); Console.WriteLine (readStream.ReadToEnd ()); response.Close (); readStream.Close (); } } /* The output from this example will vary depending on the value passed into Main but will be similar to the following: Content length is 1542 Content type is text/html; charset=utf-8 Response stream received. <html> ... </html> */

注意

为安全起见，默认情况下禁用 Cookie。如果您希望使用 Cookie，请使用 CookieContainer 属性启用 Cookie。

using System; using System.Net; using System.Text; using System.IO; public class Test { // Specify the URL to receive the request. public static void Main (string[] args) { HttpWebRequest request = (HttpWebRequest)WebRequest.Create (args[0]); // Set some reasonable limits on resources used by this request request.MaximumAutomaticRedirections = 4; request.MaximumResponseHeadersLength = 4; // Set credentials to use for this request. request.Credentials = CredentialCache.DefaultCredentials; HttpWebResponse response = (HttpWebResponse)request.GetResponse (); Console.WriteLine ("Content length is {0}", response.ContentLength); Console.WriteLine ("Content type is {0}", response.ContentType); // Get the stream associated with the response. Stream receiveStream = response.GetResponseStream (); // Pipes the stream to a higher level stream reader with the required encoding format. StreamReader readStream = new StreamReader (receiveStream, Encoding.UTF8); Console.WriteLine ("Response stream received."); Console.WriteLine (readStream.ReadToEnd ()); response.Close (); readStream.Close (); } } /* The output from this example will vary depending on the value passed into Main but will be similar to the following: Content length is 1542 Content type is text/html; charset=utf-8 Response stream received. <html> ... </html> */

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HttpWebRequest的GetResponse 方法 注意事项_httpwebresponse response = (httpwebresponse)reques

HttpWebRequest的GetResponse 方法注意事项_httpwebresponse response = (httpwebresponse)reques