HTTP Get function for powershell. Possible to to do a simple http GET request with parameters. Json formatting if Newtonsoft.Json.dll is found in your powershell profile directory and response type is Json. Supports string interpolation to parameterize request.

Function_Http-Get.ps1

# Usage:
# Http-Get http://api.asite.com/getUser/45
# or string interpolation style:
# Http-Get "http://api.asite.com/{0}/{1}" getUser 45
function Http-Get
{
	if($args.Length -lt 1)
	{
		"Invalid args."
		return;
	}
	
	# Json.net formatting if Newtonsoft.Json.dll is found in your powershell profile directory
	$formatJson = $false;
	if([System.IO.File]::Exists("$([System.IO.Path]::GetDirectoryName($profile))\Newtonsoft.Json.dll"))
	{
		[System.Reflection.Assembly]::LoadFile("$([System.IO.Path]::GetDirectoryName($profile))\Newtonsoft.Json.dll");
		$formatJson = $true;
	}
	
	$parms = New-Object System.Collections.ArrayList;
	
	for($i=1; $i -lt $args.Length; $i++)
		{ $parms.Add($args[$i]) | Out-Null; }
		
	$req = [System.Net.WebRequest]::Create([String]::Format($args[0], [System.Object[]]$parms));
	$req.Credentials = [System.Net.CredentialCache]::DefaultCredentials;
	$resp = [System.Net.HttpWebResponse]$req.GetResponse();
	
	Write-Host $resp.StatusDescription;
	
	$sr = New-Object System.IO.StreamReader($resp.GetResponseStream());
	$responseFromServer = $sr.ReadToEnd();
	
	if($formatJson -eq $true -and $resp.ContentType.StartsWith("application/json"))
	{
		$jt = [Newtonsoft.Json.Linq.JToken]::Parse($responseFromServer);
		Write-Host $jt.ToString([Newtonsoft.Json.Formatting]::Indented)
	}
	else
	{
		Write-Host $responseFromServer
	}
	
	$sr.Close();
	$resp.Close();
}

Newtonsoft.Json.dll is from the Json.net package downloadable at http://json.codeplex.com/releases/view/107620. Just the bare .dll is required if you want json formatting.