Learn SERVERLESS-FRAMEWORK with Real Code Examples

# serverless/demo_nodejs/serverless.yml
service: hello-world
provider:
    name: aws
    runtime: nodejs14.x
functions:
    hello:
        handler: handler.hello
        events:
        - http:
        path: hello
        method: get

# serverless/demo_nodejs/handler.js
'use strict';
module.exports.hello = async (event) => {
    return {
        statusCode: 200,
        body: JSON.stringify({ message: 'Hello World' })
    };
};

A simple Serverless Framework Node.js function responding to HTTP events.

# serverless/demo_python/serverless.yml
service: hello-world
provider:
    name: aws
    runtime: python3.9
functions:
    hello:
        handler: handler.hello
        events:
        - http:
        path: hello
        method: get

# serverless/demo_python/handler.py
import json

def hello(event, context):
    return {
        'statusCode': 200,
        'body': json.dumps({'message': 'Hello World'})
    }

A simple Serverless Framework Python function responding to HTTP events.

# serverless/demo_go/serverless.yml
service: hello-world
provider:
    name: aws
    runtime: go1.x
functions:
    hello:
        handler: bin/handler
        events:
        - http:
        path: hello
        method: get

# serverless/demo_go/handler/main.go
package main
import (
    "context"
    "github.com/aws/aws-lambda-go/events"
    "github.com/aws/aws-lambda-go/lambda"
)
func handler(ctx context.Context, request events.APIGatewayProxyRequest) (events.APIGatewayProxyResponse, error) {
    return events.APIGatewayProxyResponse{
        StatusCode: 200,
        Body: "Hello World",
    }, nil
}
func main() {
    lambda.Start(handler)
}

A simple Serverless Framework Go function responding to HTTP events.

# serverless/demo_java/serverless.yml
service: hello-world
provider:
    name: aws
    runtime: java11
functions:
    hello:
        handler: com.example.Handler::handleRequest

# serverless/demo_java/src/main/java/com/example/Handler.java
package com.example;
import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.RequestHandler;
import java.util.Map;
public class Handler implements RequestHandler<Map<String,Object>, String> {
    @Override
    public String handleRequest(Map<String,Object> input, Context context) {
        return "Hello World";
    }
}

A simple Serverless Framework Java function responding to HTTP events.