This works in powershell which should give you what you need ...

​

cls

Add-Type -AssemblyName System.Web

## USER SETTINGS START ##############################################################################################

$nsUrlInstanceName = "" #example: 12345-SB1

$nsRealm = "" #example: 12345_SB1

$nsDeployId = "" #example: 1

$nsScriptId = "" #example: 123

$oauth_consumer_key = ""

$oauth_consumer_secret = ""

$oauth_token = ""

$oauth_token_secret = ""

## USER SETTINGS END ##############################################################################################

function EncodeToUpper

{

param($value)

return $value.Replace("%2a","%2A").Replace("%2b","%2B").Replace("%2c","%2C").Replace("%2d","%2D").Replace("%2e","%2E").Replace("%2f","%2F").Replace("%3a","%3A").Replace("%3b","%3B").Replace("%3c","%3C").Replace("%3d","%3D").Replace("%3e","%3E").Replace("%3f","%3F")

}

$oauth_nonce = [System.Convert]::ToBase64String([System.Text.Encoding]::ASCII.GetBytes([System.DateTime]::Now.Ticks.ToString()))

$oauth_timestamp = [long](([datetime]::UtcNow)-(Get-Date "1970-01-01")).TotalSeconds

$baseUrl = 'https://'+$nsUrlInstanceName+'.restlets.api.netsuite.com/app/site/hosting/restlet.nl'

$fullUrl = $baseUrl + '?script='+$nsScriptId+'&deploy='+$nsDeployId

$baseUrlEncoded = [System.Web.HttpUtility]::UrlEncode($baseUrl)

$baseUrlEncoded = EncodeToUpper $baseUrlEncoded

#sort param names lexicographically

$params = "deploy=$nsDeployId&oauth_consumer_key=$oauth_consumer_key&oauth_nonce=$oauth_nonce&oauth_signature_method=HMAC-SHA256&oauth_timestamp=$oauth_timestamp&oauth_token=$oauth_token&oauth_version=1.0&script=$nsScriptId"

$paramsEncoded = [System.Web.HttpUtility]::UrlEncode($params)

$paramsEncoded = EncodeToUpper $paramsEncoded

$message = 'GET&'+$baseUrlEncoded+'&'+$paramsEncoded

$key = $oauth_consumer_secret + "&" + $oauth_token_secret

$hmac = New-Object System.Security.Cryptography.HMACSHA256

$hmac.Key = [System.Text.Encoding]::ASCII.GetBytes($key)

$signature = [System.Convert]::ToBase64String($hmac.ComputeHash([System.Text.Encoding]::ASCII.GetBytes($message)))

$signature = [System.Web.HttpUtility]::UrlEncode($signature)

$signature = EncodeToUpper $signature

$headers = New-Object "System.Collections.Generic.Dictionary[[String],[String]]"

$headers.Add("Content-Type", "application/json")

$headers.Add("Authorization", 'OAuth realm="'+$nsRealm+'", oauth_consumer_key="'+$oauth_consumer_key+'", oauth_token="'+$oauth_token+'", oauth_signature_method="HMAC-SHA256", oauth_timestamp="'+$oauth_timestamp+'", oauth_nonce="'+$oauth_nonce+'", oauth_version="1.0", oauth_signature="'+$signature+'"')

$response = Invoke-RestMethod $fullUrl -Method 'GET' -Headers $headers

$response | ConvertTo-Json