SyntaxError: Unexpected identifier in json function - node.js

Question

I am going to build a weather data pipeline that starts with an Internet of Things (IoT) device, utilizes a message queue to receive and deliver data, leverages a serverless function to move the data to a data warehouse and then create a dashboard that displays the information. I am getting error in function.
/**
* Background Cloud Function to be triggered by PubSub.
*
* #param{
object
}event The Cloud Functions event.
* #param{
function
}callback The callback function.
*/
exports.subscribe = function (event,
callback){
const BigQuery = require('#google-cloud/bigquery');
const projectId = "iot2analytics-ca4"; //Enter your project ID here
const datasetId = "weatherData"; //Enter your BigQuery dataset name here
const tableId = "weatherDatatable"; //Enter your BigQuery table name here -- make sure it is setup correctly
const PubSubMessage = event.data;
// Incoming data is in JSON format
const incomingData = PubSubMessage.data ? Buffer.from(PubSubMessage.data,
'base64' ).toString():"{'sensorID':'na','timecollected':'1/1/1970 00:00:00','zipcode':'00000','latitude':'0.0','longitude':'0.0','temperature':'-273','humidity':'-1','dewpoint':'-273','pressure':'0'}" ;
const jsonData = JSON.parse(incomingData);
var rows = [
jsonData
] ;
console.log(`Uploading data:$ {
JSON.stringify(rows)
} ` );
// Instantiates a client
const bigquery = BigQuery( {
projectId:projectId
} );
// Inserts data into a table
bigquery
.dataset(datasetId)
.table(tableId)
.insert(rows)
.then((foundErrors) => {
rows.forEach((row) => console.log('Inserted:', row));
if (foundErrors && foundErrors.insertErrors != undefined) {
foundErrors.forEach((err) => {
console.log(' Error:', err);
})
}
})
.catch((err) => {
console.error(' ERROR:',
err);
} );
// [
END bigquery_insert_stream
] callback();
};

Answer 1

You are using single quotes to wrap the string in the JSON object which is not allowed with standard formats. Please replace the single quotes with double quotes and then stringify your object. Here, use this
let temp = {
"sensorID":"na",
"timecollected":"1/1/1970 00:00:00",
"zipcode":"00000",
"latitude":"0.0",
"longitude":"0.0",
"temperature":"-273",
"humidity":"-1",
"dewpoint":"-273",
"pressure":"0"
}
temp = JSON.stringify(temp)
const incomingData = PubSubMessage.data ? Buffer.from(PubSubMessage.data,
'base64' ).toString(): temp;