How to parse JSON response from RapidAPI using fetch in React Native

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1

I am currently working on a React Native project to enhance my skills. For this, I am utilizing RapidAPI. When I make a request to their API, I receive a 200 OK status. However, I am having trouble retrieving the response data in JSON format.

Code Example:

getDataFromAPI = () => {
    fetch("https://numbersapi.p.rapidapi.com/7/21/date?fragment=true&json=true", {
        method: "GET",
        headers: {
            "x-rapidapi-host": "numbersapi.p.rapidapi.com",
            "x-rapidapi-key": "<Your API Key Here>"
        }
    })
    .then(res => res.json())
    .then(data => {
        console.log(data);
    })
    .catch(error => {
        console.error(error);
    });
}

componentDidMount() {
    this.getDataFromAPI();
}

I see the output in console.log(res); but can’t parse it to JSON. How can I properly access the response data as JSON?

2

It looks like your implementation for using fetch and parsing the JSON response is generally correct. However, let's delve a bit deeper to ensure everything is operating smoothly.

The provided code snippet already has a solid structure, but occasionally issues can stem from the response you receive. Here are a few points to consider:

  1. Ensure API Key Validity: Double-check that your RapidAPI key is correctly entered, as it plays a critical role in authorizing requests.
  2. Check Server Response: Confirm that RapidAPI is returning data in a JSON format. Sometimes, APIs might send a valid 200 OK response, but the payload could be in a different format.
  3. Inspect the Data Structure: While console.log(data) is straightforward, consider analyzing the structure of the JSON to understand how to leverage the data in your components.

Here’s a concise way to handle potential parsing errors:

getDataFromAPI = () => {
    fetch("https://numbersapi.p.rapidapi.com/7/21/date?fragment=true&json=true", {
        method: "GET",
        headers: {
            "x-rapidapi-host": "numbersapi.p.rapidapi.com",
            "x-rapidapi-key": "<Your API Key Here>"
        }
    })
    .then(response => {
        if (!response.ok) { 
            throw new Error('Network response was not ok'); 
        }
        return response.json();
    })
    .then(jsonData => {
        console.log(jsonData);
    })
    .catch(error => {
        console.error('Error:', error);
    });
}

componentDidMount() {
    this.getDataFromAPI();
}

This enhanced error handling will aid in diagnosing problems related to the network response or JSON parsing. Furthermore, check your development environment's network panel to trace request/response details, which might provide more context on the issues encountered.

3

Hi Hazel_27Yoga, it seems like your approach to parse the JSON response using fetch is mostly correct. If you're seeing the output in console.log(res); and having problems after that, let’s ensure everything is set correctly.

Here's a slightly modified approach to help you:

getDataFromAPI = () => {
    fetch("https://numbersapi.p.rapidapi.com/7/21/date?fragment=true&json=true", {
        method: "GET",
        headers: {
            "x-rapidapi-host": "numbersapi.p.rapidapi.com",
            "x-rapidapi-key": "<Your API Key Here>"
        }
    })
    .then(response => response.json())
    .then(jsonData => {
        console.log(jsonData);
    })
    .catch(error => {
        console.error('Error fetching data: ', error);
    });
}

componentDidMount() {
    this.getDataFromAPI();
}

Steps to verify:

  • Ensure your API key is input correctly in the "x-rapidapi-key" header.
  • Check if the network call in your debugging console confirms the request is reaching RapidAPI successfully.
  • If response.json() is causing issues, verify the format of the response. It should be a valid JSON string.

By following these steps, you should be able to parse the JSON response efficiently.