pwsh 获取类似 telent的返回内容

js的tcp服务

const net = require('net');
const server = net.createServer((c) => {
  // 'connection' listener.
  console.log('client connected');
  c.on('end', () => {
    console.log('client disconnected');
  });
  c.write('hello\r\n');
  c.pipe(c);
});
server.on('error', (err) => {
  throw err;
});
server.listen(8124, () => {
  console.log('server bound');
});

powershell获取tcp返回内容

Function Get-TCPResponse {
    <# Author:fuhj(powershell#live.cn ,http://fuhaijun.com)
    .SYNOPSIS
    Tests TCP port of remote or local system and returns a response header
    if applicable
    .DESCRIPTION
    Tests TCP port of remote or local system and returns a response header
    if applicable
    If server has no default response, then Response property will be NULL
    .PARAMETER Computername
    Local or remote system to test connection
    .PARAMETER Port
    TCP Port to connect to
    .PARAMETER TCPTimeout
    Time until connection should abort
    .EXAMPLE
    Get-TCPResponse -Computername pop.126.com -Port 110

    Computername : pop.126.com
    Port         : 110
    IsOpen       : True
    Response     : +OK Welcome to coremail Mail Pop3 Server (126coms[75c606d72bf436dfbce6.....])

    Description
    -----------
    Checks port 110 of an mail server and displays header response.
    #>
    [OutputType('Net.TCPResponse')]
    [cmdletbinding()]
    Param (
        [parameter(ValueFromPipeline, ValueFromPipelineByPropertyName)]
        [Alias('__Server', 'IPAddress', 'IP', 'domain')]
        [string[]]$Computername = $env:Computername,
        [int[]]$Port = 25,
        [int]$TCPTimeout = 1000
    )
    Process {
        ForEach ($Computer in $Computername) {
            ForEach ($_port in $Port) {
                $stringBuilder = New-Object Text.StringBuilder
                $tcpClient = New-Object System.Net.Sockets.TCPClient
                $connect = $tcpClient.BeginConnect($Computer, $_port, $null, $null)
                $wait = $connect.AsyncWaitHandle.WaitOne($TCPtimeout, $false)
                If (-NOT $wait) {
                    $object = [pscustomobject] @{
                        Computername = $Computer
                        Port         = $_Port
                        IsOpen       = $False
                        Response     = $Null
                    }
                }
                Else {
                    While ($True) {
                        #Let buffer
                        Start-Sleep -Milliseconds 1000
                        Write-Verbose "Bytes available: $($tcpClient.Available)"
                        If ([int64]$tcpClient.Available -gt 0) {
                            $stream = $TcpClient.GetStream()
                            $bindResponseBuffer = New-Object Byte[] -ArgumentList $tcpClient.Available
                            [Int]$response = $stream.Read($bindResponseBuffer, 0, $bindResponseBuffer.count)
                            $Null = $stringBuilder.Append(($bindResponseBuffer | ForEach { [char][int]$_ }) -join '')
                        }
                        Else {
                            Break
                        }
                    }
                    $object = [pscustomobject] @{
                        Computername = $Computer
                        Port         = $_Port
                        IsOpen       = $True
                        Response     = $stringBuilder.Tostring()
                    }
                }
                $object.pstypenames.insert(0, 'Net.TCPResponse')
                Write-Output $object
                If ($Stream) {
                    $stream.Close()
                    $stream.Dispose()
                }
                $tcpClient.Close()
                $tcpClient.Dispose()
            }
        }
    }
}


Get-TCPResponse  -Port 8124