Axios How To Get Error Response Even When Api Return 404 Error In Try Catch Finally

When working with APIs in your software projects, handling errors is a crucial aspect to ensure your application maintains robustness. In this guide, we will dive into the topic of fetching error responses even when encountering a 404 error status code from an API while utilizing Axios.

Let's start by understanding the typical behavior of Axios when making API requests using try-catch-finally blocks. When Axios encounters a 404 error status code from the API, it typically throws an error. This behavior can sometimes make it challenging to access detailed error information, such as the response data provided by the API server.

To address this issue and obtain the error response even when the API returns a 404 error, we can leverage Axios's interceptors. Interceptors in Axios allow us to transform request and response data before they are handled by the `then` or `catch` methods.

Firstly, let's define an interceptor specifically for handling responses. We can attach an interceptor to the Axios instance that will capture the responses, including error responses like 404, before they are processed.

Javascript

axios.interceptors.response.use(
  response =&gt; response,
  error =&gt; {
    if (error.response.status === 404) {
      return Promise.resolve(error.response);
    }
    return Promise.reject(error);
  }
);

In the interceptor function, we check if the error response status is 404. If it is a 404 error, we resolve the promise with the error response itself. By resolving the promise, we can access the error response in the `catch` block of the Axios request.

Now, let's modify our Axios request to include the error handling logic:

Javascript

try {
  const response = await axios.get('https://api.example.com/some-endpoint');
  console.log('Success: ', response.data);
} catch (error) {
  if (error.response.status === 404) {
    console.log('Error 404: ', error.response.data);
  } else {
    console.error('An error occurred: ', error.message);
  }
} finally {
  console.log('Request completed.');
}

In the modified Axios request, we utilize the `await` syntax for asynchronous handling. Inside the `catch` block, we now have the ability to differentiate and handle the 404 error response separately, enabling us to access and log the error response data specifically for 404 errors.

With these adjustments, you now have the capability to retrieve detailed error responses even in situations where the API returns 404 errors. This enhancement can significantly improve the error handling process in your applications and provide valuable insights for debugging and troubleshooting scenarios.

By effectively utilizing Axios interceptors and adjusting your error handling approach, you can elevate the resilience and functionality of your software projects when interacting with APIs.

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