The FunctionHandler method takes an S3Event parameter that contains To install the package, run the following command from your project directory: $ dotnet add package SixLabors.ImageSharp To use and supports a variety of image types and processing functions. To begin, we need to installĪn image processing library for Nuget. We will cover Lambda deployment in a separate post The CodeĮnough introduction, let’s get into the code. Machine, you’ll want to set the profile attribute to your desired profile. If you have multiple AWS credential profiles on your This is a configuration file that has some default settings used with You will notice a aws-lambda-tools-defaults.json file in the src/LambdaImageĭirectory. Make sure to run dotnet restore to restore the Nuget packages. Your new project contains two folders, src, and test, each with a Once this is finished, open the project in VS Code (or your favorite editor) usingĬode. Run the following command to create your project (within the directory you want your For this project, we will use the lambda.S3 template. If you run dotnet new in your CLI, you’ll notice several new Lambda-related Image processor would be part of a larger application managed by CloudFormation. Note: for production uses, I likely would not use these templates as my You can install these by running the following command in your favorite CLI: $ dotnet new -i Which include project templates to “bootstrap” creating Lambda functions in. NET 5, so this post uses ASP.NET Core 3.1 Getting Started NET Core SDK installed, andĪre familiar with what an S3 bucket is and how to upload the images to the bucket. NET Core and C# to resize images that are uploaded to an S3 bucket.įor purposes of this post, I will assume you have the. In this post, we will walk through how to create a Lambda function using You canĮssentially run “any” code in a Lambda function, including Node.js, Python. To worry about provisioning or maintaining the servers behind the scenes. Resize those images out of process, thus enhancing the upload experience.ĪWS Lambda is a “serverless” service which allows you to run code without having Service such as Amazon S3, you can enlist the help of a Lambda Function to Processing can cause your uploading/publishing user experience to sufferĪs it is often not an immediate response. However, resizing an image to potentially multiple smaller sizes or doing other Smaller image sizes enable better performance for your users and save onīandwidth costs when full resolution isn’t a necessity. Generating less-than-full-sized images of user-uploaded content to anĪpplication such as a CMS, social platform, or blog is a fairly common process.
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