很多時(shí)候我們需要通過Socket發(fā)送特定的TCP請求給服務(wù)器的特定端口來實(shí)現(xiàn)探測服務(wù)器的指定端口所開啟的服務(wù)。很多語言都有相應(yīng)的方法實(shí)現(xiàn)上述需求，當(dāng)然，PowerShell也不例外，比如我們要發(fā)送一個(gè)簡單的http請求到指定的web服務(wù)器：
GET / HTTP/1.1
Host:cn.bing.com

這里我們想請求微軟必應(yīng)的中文首頁，如果需要通過PowerShell向cn.bing.com服務(wù)器發(fā)送get請求，就需要?jiǎng)?chuàng)建一個(gè)System.Net.Sockets.TcpClient對象，向指定的服務(wù)器和端口發(fā)送請求。

具體代碼如下：

代碼如下:
        =====文件名：Send-TcpRequest.ps1=====
########################################
# Send-TcpRequest.ps1
## Send a TCP request to a remote computer, and return the response.
## If you do not supply input to this script (via either the pipeline, or the
## -InputObject parameter,) the script operates in interactive mode.
##
## Example:
##
## $http = @"
## GET / HTTP/1.1
## Host:cn.bing.com 
## `n`n
## "@
##
## $http | ./Send-TcpRequest cn.bing.com  80
########################################
param(
        [string] $remoteHost = "localhost",
        [int] $port = 80,
        [switch] $UseSSL,
        [string] $inputObject,
        [int] $commandDelay = 100
     )

[string] $output = ""

## Store the input into an array that we can scan over. If there was no input,
## then we will be in interactive mode.
$currentInput = $inputObject
if(-not $currentInput)
{
    $SCRIPT:currentInput = @($input)
}
$scriptedMode = [bool] $currentInput

function Main
{
    ## Open the socket, and connect to the computer on the specified port
    if(-not $scriptedMode)
    {
        write-host "Connecting to $remoteHost on port $port"
    }

    trap { Write-Error "Could not connect to remote computer: $_"; exit }
    $socket = new-object System.Net.Sockets.TcpClient($remoteHost, $port)

    if(-not $scriptedMode)
    {
        write-host "Connected. Press ^D followed by [ENTER] to exit.`n"
    }

    $stream = $socket.GetStream()

    if($UseSSL)
    {
        $sslStream = New-Object System.Net.Security.SslStream $stream,$false
        $sslStream.AuthenticateAsClient($remoteHost)