c# - 接收远程服务器返回错误 : (403) Forbidden message

Question

我在下面的代码块中收到“远程服务器返回错误:(403) 禁止访问”错误消息。具体来说，这一行失败了:var response = (HttpWebResponse)(request.GetResponse());

该代码在我的开发机器上运行良好，但在生产环境中运行不佳。我在这两种环境中都使用 IIS 7.5。两台机器都打好了补丁(安装了所有 Windows 更新)。使用 4.0 .Net 框架。不确定为什么它在一台机器上工作而不在其他机器上工作。

代码:

var uri = new Uri(url);
var request = (HttpWebRequest)WebRequest.Create(uri);

request.KeepAlive = false;
request.ProtocolVersion = HttpVersion.Version10;
request.Timeout = System.Threading.Timeout.Infinite;
request.Method = @"POST";
request.ContentType = @"application/x-www-form-urlencoded";
request.ContentLength = postData.Length;
request.UserAgent = @"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; .NET CLR 1.1.4322)";                    
request.Accept = "*/*";                    

//setup the stream variables and do the send/retrieve of data
Stream writeStream = request.GetRequestStream();
var bytes = System.Text.Encoding.ASCII.GetBytes(postData);
writeStream.Write(bytes, 0, bytes.Length);
writeStream.Close();                    

var response = (HttpWebResponse)(request.GetResponse());                    
var responseStream = response.GetResponseStream();                    
var readStream = new StreamReader(responseStream, Encoding.UTF8);                    
pageResponse = readStream.ReadToEnd();

Answer 1

您可能需要指定凭据

request.Credentials = CredentialCache.DefaultCredentials;

如果您需要传递特定的凭据，或者您传递:

request.Credentials = new NetworkCredentials("user", "password");

关于 NetworkdCredential Class 的更多信息