curl 如何下载0k的文件？

4DSpace

为何无法下载大小是0k的文件呢？我的curl执行后结果如下：

* About to connect() to ftp.abc.com.cn port 8886 (#0)
*   Trying 218.25.176.207... connected
* Connected to ftp.c2c.com.cn (218.25.176.217) port 8886 (#0)
< 220 Gene6 FTP Server v3.8.0 (Build 34) ready...
> USER a
< 331 Password required for admin.
> PASS abc
< 230 User admin logged in.
> PWD
< 257 "/" is current directory.
* Entry path is '/'
> EPSV
* Connect data stream passively
< 229 Entering Extended Passive Mode (|||53290|)
*   Trying 218.25.176.207... connected
* Connecting to 218.25.176.207 (218.25.176.207) port 53290
> TYPE I
< 200 Type set to I.
> SIZE 1.txt
< 213 0
> RETR 1.txt
< 150 Data connection accepted from 221.201.157.210:35562; transfer starting for
/1.txt (0 bytes)
* Maxdownload = -1
* Getting file with size: 0
{ [data not shown]
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0<
226 File sent ok.
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0*
Connection #0 to host ftp.abc.com.cn left intact

> QUIT
< 221 Goodbye.
* Closing connection #0

4DSpace

为何上传0k的文件就没有问题呢？

4DSpace

没有人知道么这个问题么？

4DSpace

求各位大虾们帮忙。。谢谢了