Loopback v3 SOAP does not work ( even on a valid SOAP endpoint )

[Martin Thompson]

I'm not sure what I am doing wrong here. I have followed the instructions here: https://loopback.io/doc/en/lb3/Connecting-to-SOAP.html . The web service in the tutorial doesn't work so I have substistuted for this one http://www.dneonline.com/calculator.asmx - and I have successfuly made a call through SOAPUI application ( it's a bit like Postman ).

I followed the instructions all the way through exactly , but using the web service above , but if I try to add 2 numbers through the explorer ( http://localhost:3000/explorer/ ) - in the parameter box for Add , using:

{
  "intA": 2,
  "intB": 5
}

My Result , Which is incorrect and yet it is Code 200

CURL:

curl -X POST --header 'Content-Type: application/json' --header 'Accept: application/json' -d '{ \ "intA": 2, \ "intB": 5 \ }' 'http://localhost:3000/api/CalculatorSoap/Add'

Request URL:

http://localhost:3000/api/CalculatorSoap/Add

Response Body

{
  "AddResult": 0
}

Response Code

200

Response Headers

{
  "strict-transport-security": "max-age=0; includeSubDomains",
  "x-content-type-options": "nosniff",
  "date": "Fri, 15 Jun 2018 05:25:21 GMT",
  "x-download-options": "noopen",
  "x-frame-options": "DENY",
  "content-type": "application/json; charset=utf-8",
  "access-control-allow-origin": "http://localhost:3000",
  "access-control-allow-credentials": "true",
  "etag": "W/\"f-5IE4vqBmqHTFQ8rEDclDyFspFDY\"",
  "connection": "keep-alive",
  "vary": "Origin, Accept-Encoding",
  "content-length": "15",
  "x-xss-protection": "1; mode=block"
}