How to Display a Byte Array Image from AWS S3 in a React Component

Learn how to fetch and display images stored as byte arrays in AWS S3 using a React component effectively. Follow our guide for clear steps and code examples!
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Introduction

Displaying images stored in AWS S3 from a backend server in a React component can be a daunting task, especially when dealing with byte arrays and blobs. If you've faced this issue and struggled with the responses from your SpringBoot API, you're not alone. In this post, we’ll break down a solution into easy-to-follow steps so that you can successfully render images in your React app.

Understanding the Problem

When you work with a backend API to fetch images, the data returned often isn't in a standard format. You might encounter byte arrays that need to be converted into a format your React component can render as an image. Here, we will focus on:

Fetching the byte array image from an API.

Converting the byte array into a usable Blob.

Rendering the image in a React component.

The Solution

Step 1: Fetch the Image

[[See Video to Reveal this Text or Code Snippet]]

Explanation

Use fetch to retrieve the image from the specified URL.

Create a Blob from the byte data and generate a URL using URL.createObjectURL().

Step 2: Store the Image URL in State

Next, you need to store this image URL in the component's state to use it in rendering:

[[See Video to Reveal this Text or Code Snippet]]

Explanation

On component mount, initiate both the user data and image fetch.

After retrieving the image URL, update the component's state with setState.

Step 3: Render the Image

Now, when rendering the component, make sure to include the image using the state variable img:

[[See Video to Reveal this Text or Code Snippet]]

Explanation

Utilize the img state to set the src of your CardImg.

Ensure the rest of your user information is rendered correctly.

Conclusion

By following these outlined steps, you should now be able to display images stored as byte arrays in your AWS S3 backend through your React component effortlessly. Proper use of Blob objects and understanding how to manipulate state and fetch operations in React are critical skills for handling dynamic content effectively.

Happy coding, and may your images load seamlessly!