PowerShell wrapper for Invoke-WebRequest with Proxy

Curl.ps1

#
$env:Proxy="http://YOUR-CORPORATE-PROXY-HERE" ;
Add-Type -AssemblyName 'Microsoft.PowerShell.Commands.Utility, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'
function curl
{
    param(
        [Parameter(Mandatory=$true)][string]$Uri,
        [Object]$Body,
        [String]$ContentType,
        [PSCredential]$Credential,
        [System.Collections.IDictionary]$Headers,
        [String]$InFile,
        [Int32]$MaximumRedirection,
        [Microsoft.PowerShell.Commands.WebRequestMethod]$Method,
        [String]$OutFile,
        [String]$SessionVariable,
        [Int32]$TimeoutSec,
        [String]$TransferEncoding,
        [String]$UserAgent,
        [ Microsoft.PowerShell.Commands.WebRequestSession]$Session
        )
    $p=@{ProxyUseDefaultCredentials=$true ; Proxy= $env:Proxy }
    $PSBoundParameters.GetEnumerator() | %{ $p.Add( $_.Key, $_.Value) }
    Invoke-WebRequest @p
}

The AssemblyName in the Add-Type command comes from
(Get-Command Invoke-WebRequest).Parameters.WebSession.ParameterType.AssemblyQualifiedName