Aws Api Gateway Lambda Node Js Example

Aws Api Gateway Lambda Node Js Example – In this post, I will present two of the best resources I have found that will teach you how to build

Serverless application. Once you know how to build a serverless application, and especially if you know how to provide the infrastructure as code and use a pipeline to automate your development and deployment, the rest is just your application logic. You can build almost any application according to the model recommended by Amazon.

Aws Api Gateway Lambda Node Js Example

Aws Api Gateway Lambda Node Js Example

The app below can be used as a base to build as it has templates for most (or all?) apps:

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This app is a combination of backend code from AWS BlogAWS Mobile App Backend with Hybrid Apps (pdf link) and frontend code from serverless-stack.com website with some differences (mentioned below).

Why am I using someone else’s code? For a quick proof of concept, I don’t need to reinvent the wheel. The purpose of this tutorial is to teach how to successfully build a secure serverless application following AWS best practices.

Many thanks to Solution Architects from Amazon: Sean Sr. and Leo Drakopoulos who wrote the super helpful blog and the wonderful people who founded Serverless-Stack.com: Frank Wangand Jay V. Application logic The advent of cloud business has changed the way we develop. software. So they are the responsibility of developers.

As more companies go serverless and cloud business has been booming since the last decade, companies are building software on cloud platforms such as Google Cloud Platform (GCP), AWS, Azure, etc. But if your company decides to go serverless, you need to learn new things like AWS, Azure and so on. At least you should learn things that a developer needs to build applications on the cloud platform.

Project Aws Api Gateway & Lambda: Tutorial On How To Get Your Lambda Function Plugged Into The Aws Api Gateway

In this article, I will show you how to write Lambda functions on AWS. We will write the lambda function locally, test it in the local development environment, and deploy it to AWS.

To test the Lambda function locally, you must do a few things that are explained in my previous article Call a Lambda function locally with AWS SAM.

We have two ways to write the Lambda function. First, start everything from scratch or use the starter templates provided by AWS.

Aws Api Gateway Lambda Node Js Example

We will use a template provided by SAM. Providing simple functions to get you started. We will not hard code the function.

Configuring Micro Services Behind Aws Api Gateway And Securing It With Oauth 2.0

Name your app after that and select template. I chose option 8: Quickstart: Web Backend which includes features for creating Dynamodb CRUD operations.

You will find the default project structure created by SAM. You can structure the project based on your requirements.

Now our functions are ready to be called. I wrote an article about calling a Lambda function locally with SAM. In this article, I’ve covered everything you need to know to call a lambda function locally with AWS SAM.

You must have an AWS account and AWS Cloud deployment credentials. Go to AWS and create an account if you don’t already have one.

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Collect the build artifacts of your application’s dependencies and put them in the appropriate format and location for the next steps in your workflow.

Note that to deploy it to AWS Cloud services, you must have an AWS account and AWS CLI installed on your machine.

When your functions are part of an AWS CloudFormation stack, you can retrieve logs by using the logical function ID when specifying the stack name.

Aws Api Gateway Lambda Node Js Example

Package an AWS SAM application. Create a zip file of your code and dependencies and upload it to Amazon S3. It then returns a copy of your AWS SAM template, replacing the local associated references with Amazon S3 where the command placed the artifacts.

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Publish an AWS SAM application to the AWS Serverless Application Repository. This command takes an AWS SAM package template and publishes the application to the specified region. In this beginner’s guide, we’ll briefly describe the “serverless” software architecture, and create a RESTful API using AWS, Node.js, and Swagger in minutes.

The term “Server” (aka “Function-as-a-Service)” describes a type of architecture that allows code to be deployed and executed in ephemeral and stateless containers from third-party vendors (such as Azure or AWS).

CloudFormation is a service from Amazon that allows you to build AWS resources using templates. A template is a configuration file (YML or JSON) for the provisioning of all your AWS resources, such as EC2 instances, DynamoDB tables, IAM roles and permissions, or anything else.

The request body will be stored in a DynamoDB table. In this guide, the request body must have the following structure:

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In the repo, as this is the configuration file that CloudFormation will use to create everything our application will require.

After checking the YML, go to this link and click the Create Stack button. Select Deploy Amazon S3 Template and deploy it

On the next screen, you will be asked to choose a Stack name (it can be anything). Next, click Next and select I confirm that AWS CloudFormation can create IAM resources and click Next again.

Aws Api Gateway Lambda Node Js Example

At this point, your stack is created. Wait a minute on the Stacks page until your stack status becomes CREATE_COMPLETE.

How To Quickly Create A Serverless Restful Api With Node.js And Aws

Once your stack is complete, go and get the new Lambda in your stack here. Your Lambda function name should look like $-HelloLambda-XXXX.

Once you find your Lambda, click on it for more details. Then go down to the Function Code section, change the code input type to Edit Code Inside, then open and copy

At this point, your code is “deployed” to Lambda, and all that’s left is to deploy our Gateway API so we can send HTTP requests to it.

Once you’ve found your API Gateway, you can test that everything is connected by selecting the POST option under /users and clicking TEST .

Creating A Lambda Nodejs Function With An Aws Api Gateway

On the test page, set the user id to 123 and set the request body to the following and click Test. If everything worked, the status should be 200 without data.

After testing the POST endpoint, you can verify that your data is saved by going to the /hello GET test page and attempting a request (remember to set the user id to 123). The Response Body should contain the Request Body of the POST test (see above).

Now that you’ve verified that your API Gateway, Lambda, and DynamoDB are connected, you can deploy your API Gateway to make it available online.

Aws Api Gateway Lambda Node Js Example

To deploy your API, click the Actions menu and select Deploy API. After the confirmation popup appears, set the deployment stage to prod and click Deploy.

Api Gateway Mapping Template

After you’ve deployed your API, you’ll be sent to the Production Stage page. Here you will find the domain for your API Gateway in the blue highlighted area next to Call URL.

Using the URL from the screenshot above, I should be able to send a GET /users/123/hello request to my web browser as shown below.

And that’s it! Now you have a serverless RESTful API that’s scalable, reliable, doesn’t require patching or provisioning, and doesn’t cost money when idle. I hope you enjoyed this tutorial and if you have any feedback please leave it in the comments below. Thank you! Serverless: What and why Serverless architecture is a way to build and run your applications without thinking about infrastructure. You no longer need to maintain servers to run your applications, databases and storage systems.

Yes, once you get the hang of it, it really is incredibly easy. However, you need to know the basic infrastructure first to set up a serverless application. Let’s do it!

Guide To Implementing Microservices Architecture On Aws [with Examples]

Join me in building a serverless application where users can give each other great coding tips. To keep it as simple as possible, we’ll build everything through the AWS console and focus on infrastructure. No need to deploy code from your computer to AWS.

I could show you a frontend that uses our serverless backend to give and receive coding tips. But it will be an extra layer between you and our serverless application. Here, I run the application with Curl.

A new article has been added to the CodingTips database. I have added some already and can retrieve them as well. See all coding tips now in the database:

Aws Api Gateway Lambda Node Js Example

Coding suggestion articles are stored in the AWS DynamoDB NoSQL database. There are two lambda functions at play. One to GET the coding hint articles from the database and one to POST a new coding hint article to the database. The user can access these Lambda functions through an API service provided by AWS API Gateway. This portal will redirect to the correct Lambda function based on the HTTP method (POST or GET). Both lambda functions connect to CloudWatch where you can view your function logs. AWS IAM is used to give services the right permissions to connect to each other.

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DynamoDB Amazon DynamoDB is a fully managed NoSQL database service that provides fast, predictable performance and seamless scalability. – from AWS docs: https://docs.aws.amazon.com/amazondynamodb

Pay attention to the Amazon Resource Name ARN property. We will use that later for

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