将文件从字符串或流上传到 FTP 服务器

Question

我正在尝试在 FTP 服务器上创建一个文件，但我所拥有的只是一个字符串或一个数据流以及创建文件时应使用的文件名。有没有办法从流或字符串在服务器上创建文件（我没有创建本地文件的权限）？

string location = "ftp://xxx.xxx.xxx.xxx:21/TestLocation/Test.csv";

WebRequest ftpRequest = WebRequest.Create(location);
ftpRequest.Method = WebRequestMethods.Ftp.UploadFile;
ftpRequest.Credentials = new NetworkCredential(userName, password);

string data = csv.getData();
MemoryStream stream = csv.getStream();

//Magic

using (var response = (FtpWebResponse)ftpRequest.GetResponse()) { }

Answer 1

我做这个是为了将 xml 文件发送到 FTP。它工作正常。我想这就是你需要的。

 FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://XXXXXXXXXX//" + filename);
            request.Method = WebRequestMethods.Ftp.UploadFile;

            request.Credentials = new NetworkCredential("user", "pwd");
            request.UsePassive = true;
            request.UseBinary = true;
            request.KeepAlive = true;

            StreamReader sourceStream = new StreamReader(file);
            byte[] fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());
            sourceStream.Close();
            request.ContentLength = fileContents.Length;

            Stream requestStream = request.GetRequestStream();
            requestStream.Write(fileContents, 0, fileContents.Length);
            requestStream.Close();

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

此致！

Answer 2

只需将您的流复制到 FTP 请求流：

Stream requestStream = ftpRequest.GetRequestStream();
stream.CopyTo(requestStream);
requestStream.Close();

对于字符串（假设内容是文本）：

byte[] bytes = Encoding.UTF8.GetBytes(data);

using (Stream requestStream = request.GetRequestStream())
{
    requestStream.Write(bytes, 0, bytes.Length);
}

或者更好地使用 StreamWriter:

using (Stream requestStream = request.GetRequestStream())
using (StreamWriter writer = new StreamWriter(requestStream, Encoding.UTF8))
{
    writer.Write(data);
}

如果内容是文本，你应该使用文本模式：

request.UseBinary = false;

将文件从字符串或流上传到 FTP 服务器

Upload a file to an FTP server from a string or stream

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c#

ftp

webrequest

ftpwebrequest