How to repeat a "request" until success? NODEJS

Question

I checked a few thread in StackOverflow, but nothing works for me. I have this request call and I need it to try to send the request until it succeed (but if it fails, it has to wait at least 3 seconds):

sortingKeywords.sortVerifiedPhrase = function(phrase) {

    var URL = "an API URL"+phrase; //<== Obviously that in my program it has an actual API URL
    request(URL, function(error, response, body) {
        if(!error && response.statusCode == 200) {
            var keyword = JSON.parse(body);
            if(sortingKeywords.isKeyMeetRequirements(keyword)){ //Check if the data is up to a certain criteria
                sortingKeywords.addKeyToKeywordsCollection(keyword); //Adding to the DB
            } else {
                console.log("doesn't meet rquirement");
            }
        } else {
            console.log(phrase);
            console.log("Error: "+ error);
        }

    });
};

Here's the weird part, if I call the same phrases in a row from the browser, it works almost without errors (it usually states: rate limit time esceeded).

Appreciate your help. Thanks in advance.

Answer 1

Here is a working program that I've written for this request. It sends the request via a function, if the request fails, it returns error handler and calls the function again.

If the function succeeds the program returns a promise and quits executing.

NOTE: if you enter an invalid url the programs exits right away, that's something that's have to do with request module, which I like to be honest. It lets you know that you have an invalid url. So you must include https:// or http:// in the url

var request = require('request');

var myReq;
//our request function
function sendTheReq(){
  myReq = request.get({
    url: 'http://www.google.com/',
    json: true
    }, (err, res, data) => {
    if (err) {
      console.log('Error:', err)
    } else if (res.statusCode !== 200) {
      console.log('Status:', res.statusCode)
    } else {
      // data is already parsed as JSON:
      //console.log(data);
    }
  })
}

sendTheReq();

//promise function
function resolveWhenDone(x) {
  return new Promise(resolve => {
    myReq.on('end', function(){
      resolve(x)
    })
    myReq.on('error', function(err){
      console.log('there was an error:  ---Trying again');
      sendTheReq();  //sending the request again
      f1();          //starting the promise again
    })
  });
}

//success handler
async function f1() {
  var x = await resolveWhenDone(100);
  if(x == 100){
      console.log("request has been completed");
      //handle other stuff
  }
}

f1();