Javascript blob download browser progress

August 25, 2021 / Rating: 4.6 / Views: 568

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Download file react

Let’s say you want to make a request to an API endpoint for a PDF or other document. There are a few ways you can do this to get the user to automatically start downloading the file. One method might be to open that request in a tab and then force the download, but the experience of that takes the user away from the central application. There is also the issue that if you’re using JWT then the request in the new window will fail because it doesn’t contain the Authorization token in the request. Another method would be to generate the document on the server side and provide a URL to download the file once it’s ready. The issue with this is that it leaves the location of the document exposed for further download after the initial request, which might not be that much of a problem. The biggest issue with this is that now, on the server side, we have a physical file to manage. This method is the one we’ll be looking at today, where the file data is sent to us via the API, we interpret that data, and download it directly on the client side, without opening up a new tab. It’s good to mention this early on that this method, currently, is a “hacky” implementation of achieving the goal. Although, “hacky” implementations was how we got AJAX in the first place, so who knows this might become a better standard or a better implementation might come along. Please don’t hesitate to mention it in the comments, I’m welcoming better solutions. For our backend, we’ll be using Node JS, but you could use PHP or another backend service to provide the files. We’ll be using this repository for serving the Node JS API Files.// If you want your app to work offline and load faster, you can change// unregister() to register() below. Note this comes with some pitfalls.// Learn more about service workers: Worker.unregister(); The reason for creating this article was because I was struggling to find a solution for a production React application that I was working on and I needed to figure out how to download a file on the client side. After a lot of researching, I finally stumbled on this solution and I hope it helps you too. If you got value from this, please share it on twitter 🐦 or other social media platforms. 🙏Please also follow me on twitter: @codingwithmanny and instagram at @codingwithmanny. Let’s say you want to make a request to an API endpoint for a PDF or other document. There are a few ways you can do this to get the user to automatically start downloading the file. One method might be to open that request in a tab and then force the download, but the experience of that takes the user away from the central application. There is also the issue that if you’re using JWT then the request in the new window will fail because it doesn’t contain the Authorization token in the request. Another method would be to generate the document on the server side and provide a URL to download the file once it’s ready. The issue with this is that it leaves the location of the document exposed for further download after the initial request, which might not be that much of a problem. The biggest issue with this is that now, on the server side, we have a physical file to manage. This method is the one we’ll be looking at today, where the file data is sent to us via the API, we interpret that data, and download it directly on the client side, without opening up a new tab. It’s good to mention this early on that this method, currently, is a “hacky” implementation of achieving the goal. Although, “hacky” implementations was how we got AJAX in the first place, so who knows this might become a better standard or a better implementation might come along. Please don’t hesitate to mention it in the comments, I’m welcoming better solutions. For our backend, we’ll be using Node JS, but you could use PHP or another backend service to provide the files. We’ll be using this repository for serving the Node JS API Files.// If you want your app to work offline and load faster, you can change// unregister() to register() below. Note this comes with some pitfalls.// Learn more about service workers: Worker.unregister(); The reason for creating this article was because I was struggling to find a solution for a production React application that I was working on and I needed to figure out how to download a file on the client side. After a lot of researching, I finally stumbled on this solution and I hope it helps you too. If you got value from this, please share it on twitter 🐦 or other social media platforms. 🙏Please also follow me on twitter: @codingwithmanny and instagram at @codingwithmanny.

date: 25-Aug-2021 22:02next


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