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I recently wrote a new article for Heroku’s Dev Center on carrying out asynchronous direct-to-S3 uploads using Node.js.
he article is based heavily on the previous Python version, where the only major change is the method for signing the AWS request. This method was outlined in an earlier blog post.
The article is available here and there is also a companion code repository for the example it describes.
A while ago I wrote an article for Heroku’s Dev Center on carrying out direct uploads to S3 using a Python app for signing the PUT request. Specifically, the article focussed on Flask but the concept is also applicable to most other Python web frameworks.
I’ve recently had to implement something similar, but this time as part of an Node.js application. Since the only difference between the two approaches is literally just the endpoint used to return a signed request URL, I thought I’d post an update on how the endpoint could be constructed in Node.
The Heroku Dev Center is a repository of guides and articles to provide support for those writing applications to be run on the Heroku platform.
I recently contributed an article for carrying out Direct to S3 File Uploads in Python, as I have previously used a very similar approach to interface with Amazon’s Simple Storage Service in one of my apps running on Heroku.
The approach discussed in the article focuses on avoiding as much server-side processing as possible, with the aim of preventing the app’s web dynos from becoming too tied up and unable to respond to further requests. This is done by using client-side JavaScript to asynchronously carry out the upload directly to S3 from the web browser. The only necessary server-side processing involves the generation of a temporarily-signed (using existing AWS credentials) request, which is returned to the browser in order to allow the JavaScript to successfully make the final PUT request.