Not able to insert the sensor data into Database - arrays

Question

I am trying to insert the sensor data into a SQL Server database. I have tried all the possible way to insert the incoming data into database, but I failed. I am new to Nodejs and I really have no idea why these errors are occurred during executing process. It would be great if anyone could help me.
Thank you in advance.
The error I get is:
TypeError: Cannot read property 'writeHead' of undefined.
function addData (req, resp, reqBody, data)
{
try {
if (!reqBody) throw new Error("Input not valid");
data = JSON.parse(reqBody);
//reqBody = JSON.parse(data);
if (data) {//add more validations if necessary
var sql = "INSERT INTO arduinoData (Machine, StartTime, EndTime, LengthTime) VALUES ";
sql += util.format("(%s, '%s', %s, %s) ", data.Machine, data.StartTime, data.EndTime, data.LengthTime);
db.executeSql(sql, function (data, err) {
if (err) {
httpMsgs.show500(req, resp, err);
}
else {
httpMsgs.send200(req, resp);
}
});
}
else {
throw new Error("Input not valid");
}
}
catch (ex) {
httpMsgs.show500(req, resp, ex);
}
};
function sendBackupData()
{
var jsonTable = { "table": [] };
fs.readFile("backup.json", "utf8", function (err, data) {
if (err) throw err;
jsonTable = JSON.parse(data);
if (jsonTable.table.length == 0) {
return;
}
for (var index = 0; index < jsonTable.table.length; index++) {
var options = {
url: serverURL,
method: "POST",
form: jsonTable.table.shift()
};
request.post(options, function (error, response, body) {
if (!error) {
console.log("Sent backup message!");
} else {
console.log('Error: ' + error);
console.log("CANT'T SEND BACK");
console.log(options.form);
jsonTable.table.push(options.form);
}
});
}
var outputJSON = JSON.stringify(jsonTable);
console.log(outputJSON);
fs.writeFile("backup.json", outputJSON, "utf8", function (err) {
if (err) throw err;
console.log("Sent backup data!");
});
});
}
function getTime()
{
var date = new Date();
var year = date.getFullYear();
var month = ('0' + (date.getMonth() + 1)).slice(-2);
var day = ('0' + date.getDate()).slice(-2);
var hour = ('0' + date.getHours()).slice(-2);
var minute = ('0' + date.getMinutes()).slice(-2);
var second = ('0' + date.getSeconds()).slice(-2);
// Unix Time
var unixTime = Math.floor(date / 1000);
// Check if it is day or night
var isDay;
if (date.getHours() >= 8 & date.getHours() < 16)
{
isDay = true;
}
else
{
isDay = false;
}
return [year + '-' + month + '-' + day, hour + ':' + minute + ':' + second, unixTime, isDay];
}
/*
--- Main Code ---
*/
function vibrationStart()
{
/*
Should get:
- Start time and date the vibration started
- Whether it was day or night
Will send the message, if there is network connection, once complete.
Will store message into a JSON file if there is no network connection.
*/
var jsonTable = { "table": [] };
var startTime = getTime();
console.log(startTime[0] + " " + startTime[1]);
var startData = {
machine: machineName,
start_time: startTime[0] + " " + startTime[1],
day_night: startTime[3],
active: "true"
};
const options = {
url: serverURL,
method: "POST",
form: startData
};
var reqBody = [{
Machine : "",
StartTime : ""
}];
reqBody.push({"Machine" : startData.machine,"StartTime" : startData.start_time});
var outputJSON = JSON.stringify(reqBody);
request.post(options, function (error, response, body) {
if (!error) {
console.log("Sent starting message!");
sendBackupData();
addData();
} else {
console.log("CANT'T SEND");
// Write to JSON file for backup if can't send to server
fs.readFile("backup.json", "utf8", function readFileCallback(err, data) {
if (err) throw err;
jsonTable = JSON.parse(data);
jsonTable.table.push(startData);
var outputJSON = JSON.stringify(jsonTable);
fs.writeFile("backup.json", outputJSON, "utf8", function (err) {
if (err) throw err;
});
});
}
});
return startTime[2];
}
function vibrationStop(startTimeUnix)
{
var jsonTable = { "table": [] };
var endTime = getTime();
console.log(endTime[0] + " " + endTime[1]);
var endTimeUnix = endTime[2];
var lengthTime = endTimeUnix - startTimeUnix;
console.log("Length time: " + lengthTime);
var endData = {
machine: machineName,
end_time: endTime[0] + " " + endTime[1],
length_time: lengthTime,
active: "false"
};
const options = {
url: serverURL,
method: "POST",
form: endData
};
var reqBody = [{
EndTime : "",
LengthTime :"",
}];
reqBody.push({"EndTime" : endData.end_time,"LengthTime" : endData.length_time});
var outputJSON = JSON.stringify(reqBody);
request.post(options, function (error, response, body) {
if (!error) {
console.log("Sent end message!");
sendBackupData();
addData()
} else {
console.log("CANT'T SEND");
// Write to JSON file for backup if can't send to server
fs.readFile("backup.json", "utf8", function readFileCallback(err, data) {
if (err) throw err;
jsonTable = JSON.parse(data);
jsonTable.table.push(endData);
var outputJSON = JSON.stringify(jsonTable);
fs.writeFile("backup.json", outputJSON, "utf8", function (err) {
if (err) throw err;
});
});
}
});
}
http.createServer(function (req, resp) {
app.get('/', addData);
}).listen(settings.webPort, function () {
console.log("Started listening at: " + settings.webPort);
});