HTTPAPIDemo.md

API Gateway HTTP API

Creates an API Gateway HTTP API, which enables you to create RESTful APIs with lower latency and lower costs than REST APIs.

API Gateway HTTP API official document

Manully create HTTP API

guide document

1. create sample lambda function hello-echo which just print hello info and lambda public ip

import json
import requests


def lambda_handler(event, context):
    try:
        ip = requests.get("http://checkip.amazonaws.com/")
    except requests.RequestException as e:
        # Send some context about this error to Lambda Logs
        print(e)
        raise e

    return {
        "statusCode": 200,
        "body": json.dumps({
            "message": "hello world",
            "location": ip.text.replace("\n", "")
        }),
    }

2. Create simple integration on AWS console or use the API Gateway cli

• console
• aws apigatewayv2 cli

LAMBDA_ARN=$(aws lambda get-function --function-name  hello-echo \
--query 'Configuration.FunctionArn' --region ${AWS_REGION} --output text)
ApiEndpoint=$(aws apigatewayv2 create-api --name HttpAPIDemo --protocol-type HTTP \
--target ${LAMBDA_ARN} --region ${AWS_REGION} | jq -r '.ApiEndpoint')
statement-id=$(uuidgen)
aws lambda add-permission --statement-id ${statement-id} --action lambda:InvokeFunction \
--function-name ${LAMBDA_ARN} --principal apigateway.amazonaws.com \
--source-arn "arn:aws:execute-api:us-west-1:[your accunt number]:[your gateway id]/" --region ${AWS_REGION}

curl "${ApiEndpoint}/hello-echo"

Simple Http Api

sam init -r python3.7 --name http-api-demo
cd http-api-demo
copy sample yaml http-api/simple-httpapi-template.yaml to your http-api-demo location
sam build --template simple-httpapi-template.yaml --region ${AWS_REGION}
cd .aws-sam/build/
sam local invoke --no-event

sam package --template-file simple-httpapi-template.yaml --output-template-file packaged-template.yaml --s3-bucket sam-deployment-ruiliang-zhy --region ${AWS_REGION}

sam deploy --template-file packaged-template.yaml --stack-name http-api-demo --capabilities CAPABILITY_IAM CAPABILITY_AUTO_EXPAND --region ${AWS_REGION}

4. cleanup

aws apigatewayv2 create-api delete-api --api-id <api-id>
aws cloudformation delete-stack --stack-name http-api-demo --region ${AWS_REGION}