Urgent: Unable to do achieve the below requirement in javascript

[Prashanth4576]

Need to achieve the functionality where initially we have to trigger the backend with pageNumber=0 as queryparam where backend returns response in json and we need to check the field hasNext equal to true then increase the pageNumber in queryparam e.g pageNumber=1. This process should go until hasNext equal to false finally we have to concatenate the response.  

Note:  Every time we have to trigger the same endpoint and append the queryparam. pageNumber is starts from 0, goes up to 20 and pageNumber will increase in future. So i have to handle the code now for the increased number. 

Getting first response and nothing happening after that. 

Below is the code: 

// Function to fetch all pages of data

context.setVariable("BackendURL", "https://google.com/sample/api/general?since=2024-01-01T14:00:00.000Z&until=2099-01-01T14:00:00.000Z&...");

var BackendURL = context.getVariable("BackendURL");

//fetching token from pervious policy 

var accessToken = context.getVariable("access_token");

//Assigning token to the backend

var headers = {"NetWitness-Token": accessToken};

function CyberSecurityResponseHandler(response,error) {

if (response) {

    if(response.status !=200){

                response=JSON.parse(context.getVariable("response.content"));

context.setVariable('CyberSecurityResponseStatus', response.status);

                context.setVariable('CyberSecurityResponse', response.content);

                throw "error";

            }  else {

            context.setVariable('CyberSecurityResponseStatus', response.status);

                context.setVariable('CyberSecurityResponse', response.content);

}

}

}

var myRequest = new Request(BackendURL,"GET",headers);

var exchangeObj = httpClient.send(myRequest, CyberSecurityResponseHandler);

// var exchangeObj = httpClient.send(myRequest, CyberSecurityResponseHandler);

// Function to recursively fetch data until hasNext is false

function fetchData() {

    // Send the request to the backend service

   var exchangeObj = httpClient.send(myRequest, CyberSecurityResponseHandler, function (httpClientResponse) {

        // Extracting response body

        var responseData = JSON.parse(context.getVariable("response.content"));

        try {

            // Parsing response body as JSON

            // var responseData = JSON.parse(responseBody);

            // Concatenate the current response data with the existing data

            allResponses = allResponses.concat(responseData.data);

            // Check if the response contains the 'hasNext' field and it is true

            if (responseData.hasOwnProperty('hasNext') && responseData.hasNext === true) {

                // Extracting existing pageNumber from query parameter

                var pageNumber = parseInt(request.queryParams.pageNumber || 0); // Assuming default pageNumber is 1

                // Incrementing pageNumber

                pageNumber++;

                // Update the query parameter with the incremented pageNumber

                exchangeObj.request.pageNumber = pageNumber.toString();

                // Call the fetchData function recursively to fetch next page

                fetchData();

            } else {

                // If hasNext is false, set the final response content to the concatenated data

                response.content = JSON.stringify(allResponses);

                // Send the final response back to the client

                sendResponse(response.content);

            }

        } catch (error) {

            // Log any errors encountered while parsing JSON

            console.error("Error parsing JSON response: ", error);

            // Send an error response back to the client

            response.content = JSON.stringify({ error: "Error parsing JSON response" });

            sendResponse(response.content);

        }

    });

}

// Initial array to hold all responses

var allResponses = [];

// Call the fetchData function to start fetching data

fetchData();