| $url | The URL to process |
| $content | The form data in the format <httpclient:fields><httpclient:field name="" value="" type="string|file"/>...</httpclient:fields>. If the field values will be suitably URLEncoded and sent with the mime type application/x-www-form-urlencoded. |
| $persist | The to indicate if the cookies persist for the query lifetime |
| $request-headers | Any HTTP Request Headers to set in the form <headers><header name="" value=""/></headers> |