Having Difficulty Configuring Async Request Outcome

I'm struggling to access the outcome of an asynchronous request made to an rss feed. After reading a post on How do I return the response from an asynchronous call?, which recommended using Promises, I tried implementing one. However, even though the Promise resolves, I still cannot access the result of the request outside of the function.

I've been trying to assign the variable film to the request result, but it always ends up being undefined.

var request = require("request");
var parseString = require("xml2js").parseString;

var url = 'http://feeds.frogpants.com/filmsack_feed.xml';

var film;

request(url, function(error, response, body) {
    return new Promise(function(resolve, reject) {
        if (error) {
            console.log(error);
        }
        else {
            if (response.statusCode === 200) {
                parseString(body, function(err, result) {
                    var feed = result.rss.channel[0].item.reduce(function(acc, item) {
                        acc.push(item);
                        return acc;
                    }, [])
                    resolve(feed)
                })
            }
        }
    })
    .then(function(data) {
        film = data;
    })
})

console.log(film)

When I log feed within the request function, it returns the desired results. What could I be missing here? Thank you for any insights.

Answer №1

I may not have a lot of experience, but it seems like the problem here is that console.log is being called before your asynchronous request returns any data. One possible solution could be to return "film" from the last then() function and then add another then() function to handle logging that variable.


    ...    
    .then(function(data) {
        return film = data;
    })
    .then((result) => console.log(result))
})

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