Axios Interceptors Retry Original Request And Access Original Promise

Axios interceptors are an essential feature when working with HTTP requests in your code, and they allow you to intercept all requests and responses before they are handled by your application. By using interceptors, you can add custom logic to your HTTP requests, such as modifying the request config or transforming the response data. In this article, we will focus on utilizing Axios interceptors to retry the original request and access the original promise when a request fails.

When making HTTP requests in your application using Axios, there might be scenarios where the request fails due to network issues or server errors. To handle such situations, Axios provides a simple way to retry the original request using interceptors. This can be particularly useful in ensuring that your application gracefully handles temporary network glitches.

To implement retry logic for the original request, you can define an interceptor that checks for failed requests and retries them based on your requirements. Here's an example of how you can achieve this:

Javascript

// Define a new Axios instance with interceptors
const axiosInstance = axios.create();

// Add a request interceptor
axiosInstance.interceptors.request.use(
  config =&gt; {
    // Modify the request config if needed
    return config;
  },
  error =&gt; {
    return Promise.reject(error);
  }
);

// Add a response interceptor
axiosInstance.interceptors.response.use(
  response =&gt; {
    // Do something with the response data
    return response;
  },
  error =&gt; {
    // Retry the original request if it fails
    if (error.response.status === 500) {
      return axiosInstance.request(error.config);
    }
    return Promise.reject(error);
  }
);

In the code above, we created a new Axios instance and added request and response interceptors. The response interceptor checks if the request failed with a status code of 500 (server error) and retries the original request by calling `axiosInstance.request(error.config)`. This way, you can handle retry logic based on specific conditions.

One of the advantages of using interceptors to retry requests is that you can access the original promise associated with the request. This allows you to manage asynchronous flows and handle retries in a more controlled manner. By accessing the original promise, you can maintain the context of the request and perform additional logic before resolving or rejecting the promise.

Overall, Axios interceptors provide a powerful mechanism to enhance your HTTP requests handling. By utilizing interceptors to retry the original request and access the original promise, you can build more robust and reliable applications that gracefully handle failures and network issues. Experiment with interceptors in your code and explore the possibilities they offer in improving the resilience of your applications when dealing with HTTP requests.

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