Using special characters (slash) in FTP credentials with WebClient - powershell

Question

EDIT: I have discovered it's definitely the password that is causing issues. I have a forward slash in my password and cannot figure out how to get this to accept it. I've already tried replacing it with %5B. Changing the password is not a possibility.
cd v:
$username = "*********"
$password = "*********"
$usrpass = $username + ":" + $password
$webclient = New-Object -TypeName System.Net.WebClient
function ftp-test
{
if (Test-Path v:\*.204)
{
$files = Get-ChildItem v:\ -name -Include *.204 | where { ! $_.PSIsContainer } #gets list of only the .204 files
foreach ($file in $files)
{
$ftp = "ftp://$usrpass#ftp.example.com/IN/$file"
Write-Host $ftp
$uri = New-Object -TypeName System.Uri -ArgumentList $ftp
$webclient.UploadFile($uri, $file)
}
}
}
ftp-test
When I run the above code I get
Exception calling "UploadFile" with "2" argument(s): "An exception occurred during a WebClient request."
At line:13 char:34
+ $webclient.UploadFile <<<< ($uri, $file)
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : DotNetMethodException
I'm not sure what the issue is. Searching has brought issue with proxies, but I have no proxy that I need to get through.
I can manually upload the file with ftp.exe, but I'd rather do all this in PowerShell if possible instead of generating a script to use ftp.exe with.

Answer 1

You have to URL-encode the special characters. Note that encoded slash (/) is %2F, not %5B (that's [).
Instead of hard-coding encoded characters, use Uri.EscapeDataString:
$usrpass = $username + ":" + [System.Uri]::EscapeDataString($password)
Or use the WebClient.Credentials property, and you do not need to escape anything:
$webclient.Credentials =
New-Object System.Net.NetworkCredential($username, $password)
...
$ftp = "ftp://ftp.example.com/IN/$file"
Similarly for (Ftp)WebRequest: Escape the # character in my PowerShell FTP script