serverless-http

serverless-http

Description

This module allows you to 'wrap' your API for serverless use. No HTTP server, no ports or sockets. Just your code in the same execution pipeline you are already familiar with.

Note: v4.0.0 doesn't intentionally intorudce any breaking changes, but uses a PassThrough stream internally instead of a stub - however, this is a sensitive area, so in order to avoid unintentional breaks, a semver major version was used. You should hopefully not have to change anything, but test thoroughly please.

Sponsors

Thank you to Upstash for reaching out to sponsor this project!

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Support

Supported Frameworks

(* Experimental)

• Node (http.createServer)
• Connect
• Express
• Koa
• Restana
• Sails *
• Hapi *
• Fastify *
• Restify *
• Polka *
• Loopback *

Supported Providers

• AWS
• Genezio
• Azure (Experimental, untested, probably outdated)

Deploy a Hello Word on Genezio

:rocket: You can deploy your own hello world example using the Express framework to Genezio with one click:

Examples

Please check the examples folder!

Usage example using the Koa framework

const serverless = require('serverless-http');
const Koa = require('koa'); // or any supported framework

const app = new Koa();

app.use(/* register your middleware as normal */);

// this is it!
module.exports.handler = serverless(app);

// or as a promise
const handler = serverless(app);
module.exports.handler = async (event, context) => {
  // you can do other things here
  const result = await handler(event, context);
  // and here
  return result;
};

Usage example using the Express framework with Azure

const serverless = require('serverless-http');
const express = require('express');

const app = express();

app.use(/* register your middleware as normal */);

const handler = serverless(app, { provider: 'azure' });
module.exports.funcName = async (context, req) => {
  context.res = await handler(context, req);
}

Other examples

json-server-less-λ - using serverless-http with json-server and serverless framework in AWS

Limitations

Your code is running in a serverless environment. You cannot rely on your server being 'up' in the sense that you can/should not use in-memory sessions, web sockets, etc. You are also subject to provider specific restrictions on request/response size, duration, etc.

Think of this as a familiar way of expressing your app logic, not trying to make serverless do something it cannot.

Contributing

Pull requests are welcome! Especially test scenarios for different situations and configurations.

Further Reading

Here are some more detailed examples and advanced configuration options as well as provider-specific documentation

Similar packages

Other packages similar to serverless-http

aws-serverless-express

aws-serverless-express is a similar package that allows you to run an Express.js application on AWS Lambda and Amazon API Gateway. It is specifically tailored for AWS services and provides optimizations for running Express applications in this environment. Compared to serverless-http, it is more AWS-centric and may not support other serverless platforms as seamlessly.

lambda-api

lambda-api is a lightweight web framework for AWS Lambda that provides a similar functionality to serverless-http but is designed specifically for Lambda. It offers a more minimalistic approach and is optimized for performance in the AWS Lambda environment. Unlike serverless-http, it does not support other web frameworks like Express or Koa.

middy

middy is a middleware engine for AWS Lambda that allows you to create modular and reusable middleware for your Lambda functions. While it is not a direct replacement for serverless-http, it can be used to achieve similar goals by composing middleware to handle HTTP requests and responses. It provides a more flexible and modular approach compared to serverless-http.