The NetSuite https.post() method is throwing an error that reads "Encountered unexpected character while parsing value: S. Path '', line 0, position 0"

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

Upon sending the request, I receive a Response Code of "200" along with the Error Message "Unexpected character encountered while parsing value: S. Path '', line 0, position 0"

Here is my code snippet:

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 = {};
headerObj['Content-Type'] = 'application/json';
headerObj['Accept'] = 'application/json';

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

HTTPS POST Responses 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.\"}}"
}

After validating my request data in a JSON validator and confirming its type as "object", I am puzzled by the mismatched content-type in the response message which indicated "text/html" rather than JSON data.

If anyone could provide insight into this issue, it would be greatly appreciated.

Thank you for your assistance.

javascriptjsonhttpsnetsuitesuitescript2.0

Answer №1

When setting JSON data as the Content-Type in the headers, ensure that you stringify the JavaScript Object being passed in the body:

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

In addition, as mentioned by bluehank, remember to include the headers with the request like this:

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

Answer №2

It appears that you have created a header for your request, but then failed to use it in the actual post request. Can you explain why this is?

Although you received a 200 response code indicating that the POST request was successful, there seems to be an issue with what you are trying to retrieve. You are encountering a 599 error code, typically associated with timeouts on proxies. This suggests that the problem may not be on your end, but rather with the API you are utilizing.

Answer №3

After close examination, I have discovered a discrepancy in the NetSuite documentation concerning the header object.

When using https.request() or await https.request.promise(), it is important to note that the headers object should be formatted as follows: const headerObj = { 'Content-Type': 'application/json', 'Accept': 'application/json' };

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