【发布时间】：2020-11-08 08:55:37
【问题描述】：
我尝试上传文件并在 FluentFTP 的帮助下编写了以下代码：
clientFluentFTP = new FtpClient(hostname,
username,
password);
clientFluentFTP.LoadProfile(new FtpProfile
{
Host = hostname,
Credentials = new NetworkCredential(username, password),
Encryption = FtpEncryptionMode.Explicit,
Protocols = SslProtocols.Tls12,
DataConnection = FtpDataConnectionType.PASV,
Encoding = Encoding.UTF8,
}) ;
clientFluentFTP.ValidateAnyCertificate = true;
clientFluentFTP.Connect();
clientFluentFTP.UploadFile(localfile, requestname, FtpRemoteExists.Overwrite,false,FtpVerify.Throw);
我使用我的第一个文件（UTF8 编码）进行测试，结果是一个零字节文件。 没有抛出异常，所以我假设它能够验证转移。显然，传输没有正确关闭。是的，使用命令行 FTP 客户端，我可以毫无问题地传输文件。没有消息，没有错误。只是一个零字节文件。
我做错了什么？
代码中的日志如下。
# Connect()
Status: Connecting to 46.235.40.106:21
Response: 220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
Response: 220-You are user number 3 of 50 allowed.
Response: 220-Local time is now 11:54. Server port: 21.
Response: 220-This is a private system - No anonymous login
Response: 220-IPv6 connections are also welcome on this server.
Response: 220 You will be disconnected after 15 minutes of inactivity.
Status: Detected FTP server: PureFTPd
Command: AUTH TLS
Response: 234 AUTH TLS OK.
Status: FTPS Authentication Successful
Status: Time to activate encryption: 0h 0m 0s. Total Seconds: 0,1315097.
Command: USER ***
Response: 331 User ftp_meteo_wagenborgen.nl OK. Password required
Command: PASS ***
Response: 230-Your bandwidth usage is restricted
Response: 230 OK. Current restricted directory is /
Command: PBSZ 0
Response: 200 PBSZ=0
Command: PROT P
Response: 200 Data protection level set to "private"
Command: FEAT
Response: 211-Extensions supported:
Response: EPRT
Response: IDLE
Response: MDTM
Response: SIZE
Response: MFMT
Response: REST STREAM
Response: MLST type*;size*;sizd*;modify*;UNIX.mode*;UNIX.uid*;UNIX.gid*;unique*;
Response: MLSD
Response: AUTH TLS
Response: PBSZ
Response: PROT
Response: UTF8
Response: ESTA
Response: PASV
Response: EPSV
Response: SPSV
Response: ESTP
Response: 211 End.
Status: Text encoding: System.Text.UTF8Encoding
Command: OPTS UTF8 ON
Response: 200 OK, UTF-8 enabled
Command: SYST
Response: 215 UNIX Type: L8
# UploadFile("utils/systeminfoTable.txt", "/web/systeminfoTable.txt", Overwrite, False, Throw)
# FileExists("/web/systeminfoTable.txt")
Command: SIZE /web/systeminfoTable.txt
Response: 213 1467
# DeleteFile("/web/systeminfoTable.txt")
Command: DELE /web/systeminfoTable.txt
Response: 250 Deleted /web/systeminfoTable.txt
# OpenWrite("/web/systeminfoTable.txt", Binary)
Command: TYPE I
Response: 200 TYPE is now 8-bit binary
# OpenPassiveDataStream(PASV, "STOR /web/systeminfoTable.txt", 0)
Command: PASV
Response: 227 Entering Passive Mode (46,235,40,106,168,24)
Status: Connecting to 46.235.40.106:43032
Command: STOR /web/systeminfoTable.txt
Response: 150 Accepted data connection
Status: FTPS Authentication Successful
Status: Time to activate encryption: 0h 0m 0s. Total Seconds: 0,1381567.
Status: Disposing FtpSocketStream...
Status: File Verification: PASS
# Dispose()
Status: Disposing FtpClient object...
Command: QUIT
Status: Disposing FtpSocketStream...
Status: Disposing FtpSocketStream...
【问题讨论】：
-
发布 FluentFTP 日志文件以及来自命令行 FTP 客户端的日志文件（与您的 C# 代码在同一台机器上运行）。
-
感谢您的评论，抱歉我忘记了日志。但是，我找到了解决方案：它必须是一个 ascii 文件。我本来希望自动检测到这一点。我的错。
-
我无法想象使用二进制模式如何导致目标文件为空。除非你使用一些不起眼的 FTP 服务器。
-
是的。我也不能。我说问题已解决可能不正确，因为其他应用程序也失败了。提供商使用 Pure-FTPd 作为服务器。它可能是涉及的任何组件（OpenSSL、错误的配置，等等……）。所以我会删除解决的问题。关键是很可能不是我的代码导致了这个问题。我继续寻找，也许做一个供应商切换。我将在下面修改我自己的答案。
-
这不是编码问题。它与提供程序配置有关。在我更换提供商后，问题就消失了。