Test.ps1

$ErrorActionPreference = "Stop";

# Send the POST request with the form data
$Uri = "http://localhost:8080/v1/audio/transcriptions"

function MultiPart($data){
	$FormBoundary = [System.Guid]::NewGuid().ToString();
	$BodyLines = @()
	
	$Fields = @($data.keys)
	
	foreach($FieldName in $Fields){
		$FieldValue =  $data[$FieldName];
		$BodyLines += "--$FormBoundary"
		
		if($FieldValue -is [IO.FileInfo]){
			
			$File = $FieldValue
			$BodyLines += "Content-Disposition: form-data; name=`"$FieldName`"; filename=`"$($File.name)`""
			$BodyLines += "Content-Type: application/octet-stream"
			$FileBytes 	= [System.IO.File]::ReadAllBytes($File.FullName);
			$FieldValue = [System.Text.Encoding]::GetEncoding("iso-8859-1").GetString($FileBytes)
		} else {
			$BodyLines += "Content-Disposition: form-data; name=`"$FieldName`""
		}
		
		$BodyLines += ""
		$BodyLines += $FieldValue
	}
	
	
	$BodyLines += "--$FormBoundary--"
	
	$BodyFinal = $BodyLines -Join "`r`n"
	
	Invoke-WebRequest @Args -method POST -body $BodyFinal -ContentType "multipart/form-data; boundary=$FormBoundary"
}

# Create the form data payload
$FormData = @{
    "file" 	= (Get-Item .\SampleSmall.wav)
	model 	= "Systran/faster-whisper-small"
}


$RawResp = MultiPart $FormData -Uri $Uri 
$result = [System.Text.Encoding]::UTF8.GetString($RawResp.RawContentStream.ToArray())

# Output the response from the server
$result