CODEWITHSUNDEEP
node.jshttprequest
rituparna
rituparna

Reputation: 91

response saving "undefined" in my file node.js

I know that node.js uses asynchronous behaviour. and the reason I am trying to save the response in my file system is coming to be "undefined". actually, until the response comes, the file is saved with "undefined" data.

this is my code

 request(options, function (error, response, body){
 if(!error){
    console.log(body);       //gives the response successfully
     fs.writeFile("E:/FirebaseNotif/testfile", body.notification_key,  function(err) {
if(err) {
    return console.log(err);
}

console.log("The file was saved!");     //saves but with an "undefined" data
});         
 }else{
    console.log('this is false');
 }

 });

How to handle this kind of asynchronous behaviour

Upvotes: 0

Views: 433

Answers (1)

Chandani Patel
Chandani Patel

Reputation: 471

The issue request returns a response in a string so body variable contains string value, not JSON. You need to cast the response in JSON and use the variables

Try following after receving response

console.log(body);
const data = JSON.parse(body);
fs.writeFile('testfile', data.notification_key, function (err) {
  if (err) {
    return console.log(err);
  }

  console.log('The file was saved!');
});

Upvotes: 1

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