Vista - Lee Holmes' blog: TCP in PSH

http://www.leeholmes.com/blog/Script...owerShell.aspx

Interesting entry...

I can't seem to extend this to NNTP though.

I think the proper PSH equivalent of [Return] is "`r"?

I tried different combos without luck:

PS C:\> $nntp=@"
>> LIST
>> `r`n
>> QUIT
>> `r`n
>> "@
>> <--Seems to just hang
PS C:\> $nntp|.\connect-remote.ps1 news.microsoft.com 119
PS C:\> $nntp=@"
>> LIST
>> `r
>> QUIT
>> `r
>> "@
>> <--Seems to just hang
PS C:\> $nntp|.\connect-remote.ps1 news.microsoft.com 119
PS C:\> $nntp=@"
>> LIST
>> QUIT
>> "@
>>
PS C:\> $nntp|.\connect-remote.ps1 news.microsoft.com 119
200 NNTP Service 6.0.3790.1830 Version: 6.0.3790.1830 Posting Allowed
501 Syntax Error in Command

Any ideas?

In message <O1yK5ZgGHHA.1912@TK2MSFTNGP03.phx.gbl>, Marco Shaw
<marco@Znbnet.nb.ca> writes
>Any ideas?

I've re-created your problems here.

The main idea I'd have suggested is "use telnet" ;-)

However, I'm using Vista and there's no telnet client in Vista any more.

Thomas

--
Thomas Lee
doctordns@gmail.com
MVP - Admin Frameworks and Security

> However, I'm using Vista and there's no telnet client in Vista any more.

Maybe...

http://www.leeholmes.com/blog/Replac...FromVista.aspx

Read the comments all the way at the bottom...

Version 1 of his TCP connect is also very good. It only has a 1024 byte
buffer though, but one can easily fix that...

TMK, telnet is not gone, it is just not installed by default. You can get
it back:
http://vista.beyondthemanual.com/200...lnet_back.html

I have not tried it.
--
William Stacey [C# MVP]

"Thomas Lee" <tfl@psp.co.uk> wrote in message
news:JoSuE3YkKCeFFANO@mail.psp.co.uk...
| In message <O1yK5ZgGHHA.1912@TK2MSFTNGP03.phx.gbl>, Marco Shaw
| <marco@Znbnet.nb.ca> writes
| >Any ideas?
|
| I've re-created your problems here.
|
| The main idea I'd have suggested is "use telnet" ;-)
|
| However, I'm using Vista and there's no telnet client in Vista any more.
|
| Thomas
|
| --
| Thomas Lee
| doctordns@gmail.com
| MVP - Admin Frameworks and Security

There are a few minor problems here.

1) There is a slight bug in that the script does a 1-second buffering of
data for each block of data it reads. Instead, it should do the 1-second
buffering only after it exhausts available data. This is what made you think
it didn't work, as it took so long.

## Read output from a remote host
function GetOutput
{
$outputBuffer = ""
$foundMore = $false

## Read all the data available from the stream, writing it to the
## output buffer when done.
do
{
## Allow data to buffer for a bit
start-sleep -m 1000

## Read what data is available
$foundmore = $false
while($stream.DataAvailable)
{
$read = $stream.Read($buffer, 0, 1024)
$outputBuffer += ($encoding.GetString($buffer, 0, $read))
$foundmore = $true
}
} while($foundmore)

$outputBuffer
}


2) The script works in a batch mode. You send it data, it reads all
available data, then it's your turn again. Because of that, it will buffer
up large responses before it returns them to you.

3) If a service returns a huge amount of data, the script tries to write all
of the output at once. That exhausts the capacity of the Windows console
buffer, so the fix is to split it and write it line-by-line:

## If we're in interactive mode, write the buffered
## output, and respond to input.
else
{
if($output)
{
foreach($line in $output.Split("`n"))
{
write-host $line
}
$SCRIPTutput = ""
}

Thanks for pointing this out, I'll update the original post.

--
Lee Holmes [MSFT]
Windows PowerShell Development
Microsoft Corporation
This posting is provided "AS IS" with no warranties, and confers no rights.


"Marco Shaw" <marco@Znbnet.nb.ca> wrote in message
news:O1yK5ZgGHHA.1912@TK2MSFTNGP03.phx.gbl...
> http://www.leeholmes.com/blog/Script...owerShell.aspx
>
> Interesting entry...
>
> I can't seem to extend this to NNTP though.
>
> I think the proper PSH equivalent of [Return] is "`r"?
>
> I tried different combos without luck:
>
> PS C:\> $nntp=@"
>>> LIST
>>> `r`n
>>> QUIT
>>> `r`n
>>> "@
>>> <--Seems to just hang
> PS C:\> $nntp|.\connect-remote.ps1 news.microsoft.com 119
> PS C:\> $nntp=@"
>>> LIST
>>> `r
>>> QUIT
>>> `r
>>> "@
>>> <--Seems to just hang
> PS C:\> $nntp|.\connect-remote.ps1 news.microsoft.com 119
> PS C:\> $nntp=@"
>>> LIST
>>> QUIT
>>> "@
>>>
> PS C:\> $nntp|.\connect-remote.ps1 news.microsoft.com 119
> 200 NNTP Service 6.0.3790.1830 Version: 6.0.3790.1830 Posting Allowed
> 501 Syntax Error in Command
>
> Any ideas?
>

Now, instead of outputting to the host, I'd like to ouput to a string or
file for later processing.

With version 1, this seemed more obvious to accomplish:

Change this part:
while($stream.DataAvailable)
{
$read = $stream.Read($buffer, 0, 4096)
write-host -n ($encoding.GetString($buffer, 0, $read))
}

To something like:
while($stream.DataAvailable)
{
$read = $stream.Read($buffer, 0, 4096)
write-output ($encoding.GetString($buffer, 0,
$read))|out-file -append -encoding ascii -filepath some_log_file
}

I'm sure my problem with my test though is that the buffer was just too
small. I did get output written to some_log_file! But the problem also
occured that I didn't have any feedback as to when I could enter my 2nd
command.

I'm assuming that I could just use this to output to a string, but haven't
tried it:
while($stream.DataAvailable)
{
$read = $stream.Read($buffer, 0, 4096)
$out_data+=($encoding.GetString($buffer, 0, $read))
}


With version 2 though, I'd like to use your scripting functionality, but I'm
not experienced enough in PSH to figure out what's going on, and determine
where I need to send the output to a string or file.

Can you help me?

Marco

Hi Marco;

If you want to use the script interactively, but also have it write the
output to a file, this is what I would do:

1) Add an optional filename parameter to the script so that your script can
know when the user (you) want to redirect into a file as well. You can use
the way that the script handles the $inputObject parameter as an example of
this.
2) In the part that writes the line to the host (write-host $line,) add a
line below it that appends that line to a file as well (if the user
specified a filename.) That way, you'll still get the visual feedback, but
will have the contents also going into a file.

--
Lee Holmes [MSFT]
Windows PowerShell Development
Microsoft Corporation
This posting is provided "AS IS" with no warranties, and confers no rights.


"Marco Shaw" <marco@Znbnet.nb.ca> wrote in message
news:OV9er3mGHHA.3616@TK2MSFTNGP06.phx.gbl...
> Now, instead of outputting to the host, I'd like to ouput to a string or
> file for later processing.
>
> With version 1, this seemed more obvious to accomplish:
>
> Change this part:
> while($stream.DataAvailable)
> {
> $read = $stream.Read($buffer, 0, 4096)
> write-host -n ($encoding.GetString($buffer, 0, $read))
> }
>
> To something like:
> while($stream.DataAvailable)
> {
> $read = $stream.Read($buffer, 0, 4096)
> write-output ($encoding.GetString($buffer, 0,
> $read))|out-file -append -encoding ascii -filepath some_log_file
> }
>
> I'm sure my problem with my test though is that the buffer was just too
> small. I did get output written to some_log_file! But the problem also
> occured that I didn't have any feedback as to when I could enter my 2nd
> command.
>
> I'm assuming that I could just use this to output to a string, but haven't
> tried it:
> while($stream.DataAvailable)
> {
> $read = $stream.Read($buffer, 0, 4096)
> $out_data+=($encoding.GetString($buffer, 0, $read))
> }
>
>
> With version 2 though, I'd like to use your scripting functionality, but
> I'm not experienced enough in PSH to figure out what's going on, and
> determine where I need to send the output to a string or file.
>
> Can you help me?
>
> Marco
>