使用PowerShell从FTP服务器删除文件
使用PowerShell从FTP服务器删除文件
提问于 2018-04-05 12:01:33
我编写了一个PowerShell脚本，使用FTPto本地机器下载文件。
下载文件后，我想从FTP服务器中删除它。我也写了这段代码。但不幸的是它不起作用。
有人能帮我指出我的代码出了什么问题吗？任何线索都会有帮助..。
这里是我的代码
function Delete-File($Source,$Target,$UserName,$Password)
{
$ftprequest = [System.Net.FtpWebRequest]::create($Source)
$ftprequest.Credentials = New-Object System.Net.NetworkCredential($UserName,$Password)
if(Test-Path $Source)
{
"ABCDEF File exists on ftp server."
$ftprequest.Method = [System.Net.WebRequestMethods+Ftp]::DeleteFile
$ftprequest.GetResponse()
"ABCDEF File deleted."
}
}
function Get-FTPFile ($Source,$Target,$UserName,$Password)
{
# Create a FTPWebRequest object to handle the connection to the ftp server
$ftprequest = [System.Net.FtpWebRequest]::create($Source)
# set the request's network credentials for an authenticated connection
$ftprequest.Credentials =
New-Object System.Net.NetworkCredential($username,$password)
if(Test-Path $targetpath)
{
"ABCDEF File exists"
}
else
{
"ABCDEF File downloaded"
$ftprequest.Method = [System.Net.WebRequestMethods+Ftp]::DownloadFile
$ftprequest.UseBinary = $true
$ftprequest.KeepAlive = $false
Delete-File $sourceuri $targetpath $user $pass
}
# send the ftp request to the server
$ftpresponse = $ftprequest.GetResponse()
# get a download stream from the server response
$responsestream = $ftpresponse.GetResponseStream()
# create the target file on the local system and the download buffer
$targetfile = New-Object IO.FileStream ($Target,[IO.FileMode]::Create)
[byte[]]$readbuffer = New-Object byte[] 1024
# loop through the download stream and send the data to the target
file
do{
$readlength = $responsestream.Read($readbuffer,0,1024)
$targetfile.Write($readbuffer,0,$readlength)
}
while ($readlength -ne 0)
$targetfile.close()
}
$sourceuri = "ftp://ftpxyz.com/vit/ABCDEF.XML"
$targetpath = "C:\Temp\M\NEWFOLDER\ABCDEF.XML"
$user = "*******"
$pass = "*******"
Get-FTPFile $sourceuri $targetpath $user $pass
Delete-File $sourceuri $targetpath $user $pass每次我执行这个脚本，我得到的唯一语句
下载ABCDEF文件
或
存在ABCDEF文件
我想Delete-File根本没有执行..。任何类型的线索都会有帮助。
回答 2
Stack Overflow用户
回答已采纳
发布于 2018-04-06 05:23:04
不能将Test-Path与FTP URL一起使用。因此，删除文件的代码将永远不会执行。
只需删除Test-Path条件并尝试无条件删除该文件。然后检查错误，并视需要处理“文件不存在”错误。
$ftprequest = [System.Net.FtpWebRequest]::create($Source)
$ftprequest.Credentials =
New-Object System.Net.NetworkCredential($UserName, $Password)
try
{
$ftprequest.Method = [System.Net.WebRequestMethods+Ftp]::DeleteFile
$ftprequest.GetResponse() | Out-Null
Write-Host ("File {0} deleted." -f $Source)
}
catch
{
if ($_.Exception.InnerException.Response.StatusCode -eq 550)
{
Write-Host ("File {0} does not exist." -f $Source)
}
else
{
Write-Host $_.Exception.Message
}
}尽管在成功下载文件之后才尝试删除该文件，但文件不可能不存在。
因此，您可以考虑放弃任何特定的错误处理。
Stack Overflow用户
发布于 2018-04-05 18:31:42
我在本地运行了您的脚本来试用它，并发现了一些问题。我还重构了一些东西，只是为了使它更易读(至少在我看来:)。
问题
- 第13行.
$Source参数有一个ftp://...路径。Test-Path将始终在这里返回$false，并且永远不会执行删除请求。 - 在
Get-FTPFile中，您不是引用函数的输入参数，而是引用函数外部定义的变量。我不知道这是一个复制粘贴错误还是故意的。在我看来，您应该使用发送给函数的参数。至少在下面的代码中，第38、39和50行。
代码
function Delete-File
{
param(
[string]$Source,
[string]$Target,
[string]$UserName,
[string]$Password
)
$ftprequest = [System.Net.FtpWebRequest]::create($Source)
$ftprequest.Credentials = New-Object System.Net.NetworkCredential($UserName,$Password)
if(Test-Path $Source)
{
"ABCDEF File exists on ftp server."
$ftprequest.Method = [System.Net.WebRequestMethods+Ftp]::DeleteFile
$ftprequest.GetResponse()
"ABCDEF File deleted."
}
}
function Get-FTPFile
{
param(
[string]$Source,
[string]$Target,
[string]$UserName,
[string]$Password
)
# Create a FTPWebRequest object to handle the connection to the ftp server
$ftprequest = [System.Net.FtpWebRequest]::create($Source)
# set the request's network credentials for an authenticated connection
$ftprequest.Credentials =
New-Object System.Net.NetworkCredential($UserName,$Password)
if(Test-Path $Target)
{
"ABCDEF File exists"
}
else
{
"ABCDEF File downloaded"
$ftprequest.Method = [System.Net.WebRequestMethods+Ftp]::DownloadFile
$ftprequest.UseBinary = $true
$ftprequest.KeepAlive = $false
Delete-File $Source $Target $UserName $Password
}
# send the ftp request to the server
$ftpresponse = $ftprequest.GetResponse()
# get a download stream from the server response
$responsestream = $ftpresponse.GetResponseStream()
# create the target file on the local system and the download buffer
$targetfile = New-Object IO.FileStream ($Target,[IO.FileMode]::Create)
[byte[]]$readbuffer = New-Object byte[] 1024
# loop through the download stream and send the data to the target
file
do{
$readlength = $responsestream.Read($readbuffer,0,1024)
$targetfile.Write($readbuffer,0,$readlength)
}
while ($readlength -ne 0)
$targetfile.close()
}
$sourceuri = "ftp://ftpxyz.com/vit/ABCDEF.XML"
$targetpath = "C:\Temp\M\NEWFOLDER\ABCDEF.XML"
$user = "*******"
$pass = "*******"
Get-FTPFile $sourceuri $targetpath $user $pass
#Delete-File $sourceuri $targetpath $user $pass也有现成的PowerShell cmdlet可以与FTP/SFTP对话，不需要从头创建所有东西，除非您需要。
总之，作为参考，你可以去看看。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/49671897
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