Image uploading with React.js, Node.js, and AWS S3

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The method used performs adequately for both single and multiple file image uploads. This is a continuation of my previous blog post on Capturing Images in React Native. It also instructs Express to load all the files in the public directory into the root directory of the project that is, it exposes them to be rendered through a call to the file path from the root URL.

At this point, the component will re-render, displaying the name of the uploaded file and a preview of the transformed image. We then create the form data object. So, when we get to the callback which can be refactored to custom middleware , the file is available as part of req object.

Image uploading with React.js, Node.js, and AWS S3

As with any programming problem there are a million ways to achieve this outcome with various tradeoffs. Below is a way that I feel accounts for as many possible scenarios you might encounter while maintaining a streamlined codebase. Before we get too far, here is a of what we are going to be building today. And the Github if you want to skip ahead. Presentation aka dumb Components This project is bootstrapped with. I am assuming you already have some experience with CRA. If not, here is. First things first, Spinner. If there was an additional button, I probably would have. Here we are setting up our two buttons to either upload a single image file or multiple images. Still no big surprises. Its time to move on to the meat of this project in the App. This the core of the project so lets break it down a little bit. We are extracting the files to be uploaded out of the DOM and shipping them off to our server in a fetch request. It also allows us to update the state of our application to show that something is happening spinner or show the images when they come back successfully. Its also helpful to deal with errors that happen in the application. More on that below. We are now ready to move on to writing our server. Server The easiest way to get started with storing images is to have a third party host the images and we just use a string url reference to that image to display it in the application. Go ahead and to get your api keys. After signing up for Cloudinary we need to plug those keys into a. If you need a little help with that,. Time to get into the server code. Bonus - Breaking the Code As developers, we should be constantly thinking about how a user may break our program and trying to anticipate those bugs before they occur. In the case of uploading an image I came up with a few ways a user could bring this application down surely there are more and I would love to hear about it if you come up with one. It is more robust in how it manages negative outcomes for example, using a toast component to provide feedback to the user. This is intentional, so we can focus on the core workflow in this Medium post and still have access to a more production ready solution when you use the. Takeaways I hope this helped you get your head wrapped around uploading images and handling errors with React. Would love to hear if you have a different approach to the problem or a way to improve this solution.

It's image upload react best to tell the user that an error occurred as well. This actually handles the Base64 encoding for our upload. Servile the React option under the CodeMix list of projects, name the application, and click Next to proceed make sure you're connected to the Internet to get the newest React template and folder structure for the application. Meaning that if does not try to upload if we have not yet met a picture. Component { constructor props {. I broke this into a separate method, following the. The task seems fairly easy. Afterwards, we create the route to which the image will be posted this is done after we enabled the CORS middleware.