LuaSoap and argument containting an '&'

[Laurent FAILLIE <l_faillie@...>]

Hello,

How to encode an argument that contains an ampersand ?

My code is the following :

 client.call {
        url = "">        soapaction = "nanaafoutre",
        method = "Report",
        entries = {
            {
                    tag="status",
                    attr = { "xsi:type", ["xsi:type"] = "xsd:boolean", },
                    rc == 0 and "true" or "false"
                },{
                    tag="output",
                    attr = { "xsi:type", ["xsi:type"] = "xsd:string", },
                    res
                }
            }
    }
 
but evrytime the string res contains "&" character, I got following error :

lua: /usr/local/share/lua/5.1/soap/client.lua:78: Error on request: 1

<?xml version="1.0" encoding="UTF-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"><SOAP-ENV:Body><SOAP-ENV:Fault><faultcode>SOAP-ENV:Client</faultcode><faultstring>Bad Request</faultstring></SOAP-ENV:Fault></SOAP-ENV:Body></SOAP-ENV:Envelope>

So what have I to do ?

Thanks

Laurent