Send a request with arrays in Node-soap (node.js)

I am communicating to a web service using nodejs and node-soap. But i just can't seem to get the syntax right for passing the parameters to the service.

The documentation says i need to send an array with the field uuid and its value.

Here is the Php code i got as an example from the web service owner

$uuid = "xxxx";

    $param = array("uuid"=>new SoapVar($uuid,
    XSD_STRING,
    "string", "http://www.w3.org/2001/XMLSchema")
    )

and here is the code i am using in my node server

 function getSoapResponse()
{
    var soap = require('soap');
      var url = 'http://live.pagoagil.net/soapserver?wsdl';
      var auth = [{'uuid': 'XXXXXXXXX'}];

      soap.createClient(url, function(err, client) {
      client.ListaBancosPSE(auth, function(err, result) 
      {
          console.log(result);
          console.log(err);
      });
  });

With this i get bad xml error

var auth = [{'uuid': 'XXXXXXXXX'}];

or

var auth = [["uuid",key1],XSD_STRING,"string","http://www.w3.org/2001/XMLSchema"];

and with this i get the response "the user id is empty" (the uuid)

 var auth = {'uuid': 'XXXXXXXXX'};

Any suggestions?

Finally using the content in this answer and modifying the code in the soap-node module i was able to obtain the code i needed.

I needed something like this:

      <auth xsi:type="ns2:Map">
        <item>
          <key xsi:type="xsd:string">uuid</key>
          <value xsi:type="xsd:string">{XXXXXX}</value>
        </item>
      </auth>

so I used this for creating the parameters:

var arrayToSend= 
{auth :
    [  
        {   'attributes' : {'xsi:type':"ns2:Map"}, 
            'item':  
                [
                    {'key' :
                        {'attributes' : 
                            { 'xsi:type': 'xsd:string'},
                            $value: 'uuid'
                        }
                    },
                    {'value' :
                        {'attributes' : 
                            { 'xsi:type': 'xsd:string'},
                            $value: uuid
                        }
                    }
                ]
        }   

    ]
};

and sent it like this:

soap.createClient(url, myFunction);


    function myFunction(err, client) 
    {
      client.ListaBancosPSE(arrayToSend,function(err, result) 
      {
          console.log('\n' + result);
      });
    }

Then the tricky part was modyfing the wsd.js so it didn't add a extra tag everytime i used and array. I went to line 1584 and changed the if for this:

    if (Array.isArray(obj)) 
  {
      var arrayAttr = self.processAttributes(obj[0]),
          correctOuterNamespace = parentNamespace || ns; //using the parent namespace if given
      parts.push(['<', correctOuterNamespace, name, arrayAttr, xmlnsAttrib, '>'].join(''));
    for (var i = 0, item; item = obj[i]; i++) 
    {

      parts.push(self.objectToXML(item, name, namespace, xmlns, false, null, parameterTypeObject, ancXmlns));
    }
      parts.push(['</', correctOuterNamespace, name, '>'].join(''));
  } 

basically now it does not push the open and close tag in every iterarion but instead only before and after the whole cycle.

Also i needed to add the definitions for the xlmns of the message. Client.js:186

xml = "<soap:Envelope " +
    "xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\" " +
    'xmlns:xsd="http://www.w3.org/2001/XMLSchema"' +
    'xmlns:ns2="http://xml.apache.org/xml-soap"' +
    "xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" " +

Hopefully this could be of help for people using this library and being in this situation.