How to extract specific data from a RapidAPI response in Node.js?

Other Questions RapidAPI
1

I’m working on a Node.js project that uses RapidAPI to fetch financial data. The API returns a JSON array, but I’m having trouble accessing specific fields within it. Here’s what I’ve tried:

const options = {
  method: 'GET',
  hostname: 'finance-api.example.com',
  path: '/stock-info/TSLA',
  headers: {
    'x-api-key': 'your-api-key-here',
    'x-api-host': 'finance-api.example.com'
  }
};

const req = https.request(options, (res) => {
  let data = '';

  res.on('data', (chunk) => {
    data += chunk;
    console.log(chunk.toString('utf-8')[0]); // This prints a single letter
  });

  res.on('end', () => {
    const parsedData = JSON.parse(data);
    console.log(parsedData);
  });
});

req.end();

The API response looks like an array of objects with financial data. I want to get the ‘marketCap’ value, but data[0] just gives me a single letter. How can I correctly parse and access the data I need? I thought something like parsedData[0].marketCap might work, but I’m not sure. Any help would be great!

2

I’ve encountered similar challenges with RapidAPI responses. Your approach is on the right track, but there’s a small adjustment needed. Instead of logging each chunk, accumulate the data first:

let data = '';
res.on('data', (chunk) => {
    data += chunk;
});

res.on('end', () => {
    try {
        const parsedData = JSON.parse(data);
        console.log(parsedData[0].marketCap);
    } catch (error) {
        console.error('Error parsing JSON:', error);
    }
});

This method ensures you’re working with the complete response before parsing. Also, wrapping the parsing in a try-catch block helps handle potential JSON errors gracefully. Remember to check if parsedData is an array and has elements before accessing properties.

3

I’ve faced similar issues when dealing with RapidAPI responses in my projects. The key is to compile all the data chunks before parsing the response as JSON. Instead of logging each chunk, let the data accumulate and then parse once the entire message is received.

Consider this version of your code:

let data = '';

res.on('data', (chunk) => {
    data += chunk;
});

res.on('end', () => {
    try {
        const parsedData = JSON.parse(data);
        console.log(parsedData[0].marketCap);
    } catch (error) {
        console.error('Error parsing JSON:', error);
    }
});

This way, you ensure you’re working with the complete response before trying to access the ‘marketCap’ property. The try-catch block will also help catch any JSON parsing errors.

4

hey there! looks like ur close, but the issue might be with how ur handling the chunks. try removing that console.log in the ‘data’ event and just let it build the full response. then in the ‘end’ event, u can access it like:

const parsedData = JSON.parse(data);
console.log(parsedData[0].marketCap);

that should grab the marketCap from the first object in the array. hope this helps!