NetSuite https.post() method response is giving Error "Unexpected character encountered while parsing value: S. Path '', line 0, position 0"

Question

I'm trying to send the below JSON data request to the 3rd party system using the "N/https" modules https.post() method.

I'm getting the Response Code as "200" with Error Message "Unexpected character encountered while parsing value: S. Path '', line 0, position 0"

Please refer my code given below

var requestData = {
    "terminal": "345678",
    "user": "TestUser1234",
    "password": "XXXXXX",
    "Currency": "USD",
    "Total": "25",
    "GoodURL": "https://gatewayxx.test.com/sandbox/landingpage",
    "Language": "EN"
};

log.debug('Typeof - RequestData: ', typeof requestData);

var headerObj = new Array();
headerObj['Content-Type'] = 'application/json';
headerObj['Accept'] = 'application/json';

var response = https.post({
    url: "https://gatewayxx.test.com",
    body: requestData
});

HTTPS POST Reponses Message:

{
    "type": "http.ClientResponse",
    "code": 200,
    "headers": {
        "Cache-Control": "private",
        "Server": "Microsoft-IIS/7.5",
        "Content-Length": "152",
        "Date": "Fri, 02 Oct 2020 05:44:47 GMT",
        "Content-Type": "text/html; charset=utf-8",
        "Via": "1.1 mono002"
    },
    "body": "{\"URL\":\"\",\"ConfirmationKey\":\"\",\"Error\":{\"ErrCode\":599,\"ErrMsg\":\"Unexpected character encountered while parsing value: S. Path '', line 0, position 0.\"}}"
}

I check my request data in JSON validator, There is no error in it. Also in the code I have validated it using the typeof property. It is also showing it as "object".

Also if you notice the response message it is giving the response "Content-Type" as "text/html" instead of JSON data.

I'm not sure of what mistake I'm doing while sending the JSON data, can anyone help me to understand this issue.

Thanks a lot in advance.

Answer 1

You're specifying JSON data as the Content-Type in the headers, but you're passing a JavaScript Object in the body. You need to stringify the object to a JSON string:

var response = https.post({
    url: "https://gatewayxx.test.com",
    body: JSON.stringify(requestData)
});

Also, as pointed out by bluehank, you are not sending the headers with the request - you probably mean:

var response = https.post({
    url: "https://gatewayxx.test.com",
    body: JSON.stringify(requestData),
    headers: headerObj
});