feat: HttpListenerRequest.get_Form/FormData ( Fixes #1121 )

Types/HttpListener/Request/Alias.psd1

@@ -1,5 +1,6 @@
 @{
     IP = 'IPAddress'
+    Form = 'FormData'
     HostHeader = 'HostName'
     Subdomains = 'Subdomain'
     QueryParameters = 'QueryParameter'

Types/HttpListener/Request/get_FormData.ps1

@@ -0,0 +1,31 @@
+<#
+.SYNOPSIS
+    Get the form data.
+.DESCRIPTION
+    Get the form data from the request.
+.OUTPUTS
+    [Ordered]    
+.NOTES
+    If the content type was not application/x-www-form-urlencoded, this will return an empty dictionary.
+
+    If there was no request body, this will return an empty dictionary.
+
+    If the request body is not already cached, it will be parsed and cached.
+
+#>
+param()
+if ($this.'.CachedFormData') { return $this.'.CachedFormData' }
+$cachedFormData = [Ordered]@{}
+if ($this.ContentType -match 'application/x-www-form-urlencoded' -and $this.Body) {
+    $parsedFormData = [Web.HttpUtility]::ParseQueryString($this.Body)
+    foreach ($key in $parsedFormData.Keys) {
+        $cachedFormData[$key] = $parsedFormData[$key]
+    }
+}
+$this.psobject.properties.add((
+    [psnoteproperty]::new('.CachedFormData', $cachedFormData)
+), $true)
+return $cachedFormData
+
+
+