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问题描述
我想在一个FTP文件夹回路检查文件是否已经到达
我做的:
的FtpWebRequest请求=(的FtpWebRequest)WebRequest.Create(FTP://本地主机:8080);
request.Credentials =新的NetworkCredential(匿名,);
request.Method = WebRequestMethods.Ftp.ListDirectoryDetails;而(真)
{
使用使用(FtpWebResponse响应=(FtpWebResponse)request.GetResponse())
(流responseStream = response.GetResponseStream())使用(StreamReader的读者=新的StreamReader(responseStream))
{
Console.WriteLine
(reader.ReadToEnd());
reader.Close();
response.Close();
}
}
但在第二次迭代我得到一个异常:
解决方案
对不起,我错过了它,你只发出一个请求,并试图多次得到回应。试试下面的代码:
,而(真)
{
的FtpWebRequest请求=(的FtpWebRequest)的WebRequest。创建(FTP://本地主机:8080);
request.Credentials =新的NetworkCredential(匿名,);
request.Method = WebRequestMethods.Ftp.ListDirectoryDetails;使用使用(流responseStream = response.GetResponseStream())
使用(StreamReader的读者=新的StreamReader(FtpWebResponse响应=(FtpWebResponse)request.GetResponse())
(responseStream ))
{
Console.WriteLine(reader.ReadToEnd());
reader.Close();
response.Close();
}
}
您应该在最后添加某种暂停虽然每个循环。你不想轰炸服务器。
I want to loop on a FTP folder for check if a file has arrived
I do:
FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://localhost:8080");
request.Credentials = new NetworkCredential("anonymous", "");
request.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
while(true)
{
using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())
using (Stream responseStream = response.GetResponseStream())
using (StreamReader reader = new StreamReader(responseStream))
{
Console.WriteLine(reader.ReadToEnd());
reader.Close();
response.Close();
}
}
But at the second iteration I get an exception:
解决方案
Sorry, I missed it, you're only issuing one request and trying to get a response multiple times. Try the code below:
while(true)
{
FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://localhost:8080");
request.Credentials = new NetworkCredential("anonymous", "");
request.Method = WebRequestMethods.Ftp.ListDirectoryDetails;
using (FtpWebResponse response = (FtpWebResponse)request.GetResponse())
using (Stream responseStream = response.GetResponseStream())
using (StreamReader reader = new StreamReader(responseStream))
{
Console.WriteLine(reader.ReadToEnd());
reader.Close();
response.Close();
}
}
You should add a pause of some sort at the end of each loop though. You don't want to bombard the server.
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