教程：利用 Lambda 代理集成创建 REST API

export const handler = async(event, context) => {
    console.log('Received event:', JSON.stringify(event, null, 2));
    var res ={
        "statusCode": 200,
        "headers": {
            "Content-Type": "*/*"
        }
    };
    var greeter = 'World';
    if (event.greeter && event.greeter!=="") {
        greeter =  event.greeter;
    } else if (event.body && event.body !== "") {
        var body = JSON.parse(event.body);
        if (body.greeter && body.greeter !== "") {
            greeter = body.greeter;
        }
    } else if (event.queryStringParameters && event.queryStringParameters.greeter && event.queryStringParameters.greeter !== "") {
        greeter = event.queryStringParameters.greeter;
    } else if (event.multiValueHeaders && event.multiValueHeaders.greeter && event.multiValueHeaders.greeter != "") {
        greeter = event.multiValueHeaders.greeter.join(" and ");
    } else if (event.headers && event.headers.greeter && event.headers.greeter != "") {
        greeter = event.headers.greeter;
    } 
    res.body = "Hello, " + greeter + "!";
    return res
};

import json


def lambda_handler(event, context):
    print(event)

    greeter = 'World'

    try:
        if (event['queryStringParameters']) and (event['queryStringParameters']['greeter']) and (
                event['queryStringParameters']['greeter'] is not None):
            greeter = event['queryStringParameters']['greeter']
    except KeyError:
        print('No greeter')

    try:
        if (event['multiValueHeaders']) and (event['multiValueHeaders']['greeter']) and (
                event['multiValueHeaders']['greeter'] is not None):
            greeter = " and ".join(event['multiValueHeaders']['greeter'])
    except KeyError:
        print('No greeter')

    try:
        if (event['headers']) and (event['headers']['greeter']) and (
                event['headers']['greeter'] is not None):
            greeter = event['headers']['greeter']
    except KeyError:
        print('No greeter')

    if (event['body']) and (event['body'] is not None):
        body = json.loads(event['body'])
        try:
            if (body['greeter']) and (body['greeter'] is not None):
                greeter = body['greeter']
        except KeyError:
            print('No greeter')

    res = {
        "statusCode": 200,
        "headers": {
            "Content-Type": "*/*"
        },
        "body": "Hello, " + greeter + "!"
    }

    return res