Problem:
当我ftp一次只上传一个文件时,文件上传得很好,但是当我使用多个后台工作人员将文件上传到ftp服务器时,我得到例外:
- ex {“远程服务器返回错误:(550)文件不可用 (例如,找不到文件,没有访问权限。)} System.Exception {System.Net.WebException}
只有部分文件上传。我很确定该文件在该位置退出,实际上在另一次运行中,它正在抱怨的文件不存在,但是错误会在另一个文件上移动。
Code Description:
在下面的代码中,我从一个ftp服务器下载文件并将其放在另一个上。此代码位于BackgroundsWorker_DoWork方法中。背景工作正在循环中创建。
void imageDownloadWorker_DoWork(object sender, DoWorkEventArgs e)
{
string[] ftpInfo = (string[])e.Argument;
try
{
///////////////////////////Downloading///////////////////////////////////////
string uri = String.Format("ftp://{0}/{1}/images/{2}", ftpInfo[1], ftpInfo[2], ftpInfo[5]);
FtpWebRequest request = (FtpWebRequest)WebRequest.Create(uri);
request.Method = WebRequestMethods.Ftp.DownloadFile;
request.UseBinary = true;
request.Credentials = new NetworkCredential(ftpInfo[3], ftpInfo[4]);
FtpWebResponse response = (FtpWebResponse)request.GetResponse();
Stream ftpStream = response.GetResponseStream();
long cl = response.ContentLength;
int bufferSize = 4096;
int readCount = 0;
byte[] buffer = new byte[bufferSize];
MemoryStream memStream = new MemoryStream();
readCount = ftpStream.Read(buffer, 0, bufferSize);
while (readCount > 0)
{
memStream.Write(buffer, 0, readCount);
readCount = ftpStream.Read(buffer, 0, bufferSize);
}
response.Close();
///////////////////////////Uploading///////////////////////////////////////
string uri1 = String.Format("ftp://{0}/{1}/{2}", "127.0.0.1", string.Empty, ftpInfo[5]);
FtpWebRequest request1 = (FtpWebRequest)WebRequest.Create(uri1);
request1.Credentials = new NetworkCredential("user", "password");
request1.KeepAlive = false;
request1.Method = WebRequestMethods.Ftp.UploadFile;
request1.UseBinary = true;
request1.ContentLength = memStream.Length;
int buffLength = 4096;
byte[] buff = new byte[buffLength];
int contentLen;
// Stream to which the file to be upload is written
Stream strm = request1.GetRequestStream();
memStream.Seek(0, SeekOrigin.Begin);
contentLen = memStream.Read(buff, 0, buffLength);
// Till Stream content ends
while (contentLen != 0)
{
// Write Content from the file stream to the FTP Upload Stream
strm.Write(buff, 0, contentLen);
contentLen = memStream.Read(buff, 0, buffLength);
}
// Close the file stream and the Request Stream
strm.Close();
ftpStream.Close();
memStream.Close();
}
catch(Exception ex)
{
MessageBox.Show("While Downloading File " + ftpInfo[5] + " " + ex.ToString(), "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
e.Result = null;
return;
}
Edit:
在File Zilla Server中,有一个选项General Settings> Perfomance Settings>我已设置的线程数为20,它没有任何区别。
答案 0 :(得分:0)
您的代码可能没有任何问题。该错误是权限错误。
答案 1 :(得分:0)
在黑暗中完成刺穿,但上传目标服务器是否有每个IP限制的连接?如果是这样,您可能会因为超过单个IP地址的并发连接限制而违反此规定。