调用pb开发的webserver（HTTP POST）
/*POST /webservice/n_webservice.asmx/uf_ab HTTP/1.1
Host: localhost
Content-Type: application/x-www-form-urlencoded
Content-Length: length
ll_a=string&ll_b=string*/
/*获取结果
HTTP/1.1 200 OK
Content-Type: text/xml; charset=utf-8
Content-Length: length
<?xml version="1.0" encoding="utf-8"?>
<short xmlns="http://webi.org">short</short>*/
//出参是json格式{"statusCode":"2"}
