如何保存ftp文件?

本文关键字：ftp 文件 保存 何保存 | 更新日期: 2023-09-27 18:18:48

我有一个方法将文件夹结构从ftp复制到本地文件夹，然后复制其中包含的所有文件:

public void CreateDirectories()
{
    FtpWebRequest request = (FtpWebRequest)WebRequest.Create(Url);
    request.Credentials = new NetworkCredential(Login, Pass);
    request.Method = WebRequestMethods.Ftp.ListDirectory;
    string soursePath = @"L:'Test";
    StreamReader streamReader = new StreamReader(request.GetResponse().GetResponseStream());
    string directoryName = streamReader.ReadLine();
    while (directoryName != null)
    {
        //Create directories structure
        if (directoryName.StartsWith("I") && !directoryName.Contains("p"))
        {
            string newPath = System.IO.Path.Combine(soursePath, directoryName);
            if (!System.IO.Directory.Exists(newPath))
            {
                System.IO.Directory.CreateDirectory(newPath);
                //get file list and invoke DownLoad(string directoryName, string fileName)
                FtpWebRequest fileRequest = (FtpWebRequest)WebRequest.Create(Url + directoryName + "/");
                fileRequest.Credentials = new NetworkCredential(Login, Pass);
                fileRequest.Method = WebRequestMethods.Ftp.ListDirectory;
                StreamReader fileStreamReader = new StreamReader(fileRequest.GetResponse().GetResponseStream());
                string fileName = fileStreamReader.ReadLine();
                while (fileName != null)
                {
                    DownLoad(directoryName, fileName);
                    fileName = streamReader.ReadLine();
                }
            }
        }
        directoryName = streamReader.ReadLine();
    }
    request = null;
    streamReader = null;
}

和复制当前文件的方法:

public void DownLoad(string directoryName, string fileName)
{
    string localPath = @"L:'Test'" + directoryName;
    FtpWebRequest requestFileDownload = (FtpWebRequest)WebRequest.Create("ftp://ftp.equip.me/prod/" + directoryName + "/" + fileName);
    requestFileDownload.Credentials = new NetworkCredential(Login, Pass);
    requestFileDownload.Method = WebRequestMethods.Ftp.DownloadFile;
    FtpWebResponse responseFileDownload = (FtpWebResponse)requestFileDownload.GetResponse();
    Stream responseStream = responseFileDownload.GetResponseStream();
    FileStream writeStream = new FileStream(localPath + "''" + fileName, FileMode.Create);
    int Length = 2048;
    Byte[] buffer = new Byte[Length];
    int bytesRead = responseStream.Read(buffer, 0, Length);
    while (bytesRead > 0)
    {
        writeStream.Write(buffer, 0, bytesRead);
        bytesRead = responseStream.Read(buffer, 0, Length);
    }
    responseStream.Close();
    writeStream.Close();
    requestFileDownload = null;
    responseFileDownload = null;
}

但是在Stream responseStream = responseFileDownload.GetResponseStream();它停止了近40秒，然后抛出一个超时异常，没有一个文件没有保存(文件很小- 50 kb)

如何保存ftp文件?

您应该尝试的第一件事是关闭被动模式，因为这被大多数防火墙自动阻止，但这是ftpWebRequest的默认操作模式。

就在这行下面:

requestFileDownload.Method = WebRequestMethods.Ftp.DownloadFile;

和这个

requestFileDownload.UsePassive = false;
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