public HTTPResponse Post(String file, NVPair form_data[], NVPair headers[]) throws IOException, ModuleException
public HTTPResponse Post(String file)  throws IOException, ModuleException
    public HTTPResponse Post(String file, NVPair form_data[], NVPair headers[])                throws IOException, ModuleException    {	int idx;	for (idx=0; idx<headers.length; idx++)	    if (headers[idx] != null &&		headers[idx].getName().equalsIgnoreCase("Content-type")) break;	if (idx == headers.length)	{	    headers = Util.resizeArray(headers, idx+1);	    headers[idx] =		new NVPair("Content-type", "application/x-www-form-urlencoded");	}	return Post(file, Codecs.nv2query(form_data), headers);    }