AWS Lambda Function URLs のリクエストデータを CDK Watch しながら操作する

$ mkdir cdk-lambda-url && cd cdk-lambda-url

$ cdk init app --language typescript
:
:
Executing npm install...
✅ All done!

#新しいターミナルセッション
$ cd cdk-lambda-url
$ npm run watch
:
:
File change detected. Starting incremental compilation...

{
  "app": "npx ts-node --prefer-ts-exts bin/cdk-lambda-url.ts",
  "watch": {
    "include": [
      "**",
    ],
    "exclude": [
      "README.md",
      "cdk*.json",
      "**/*.d.ts",
      "tsconfig.json",
      "package*.json",
      "yarn.lock",
      "node_modules",
      "test"
    ]
  },
  "context": {
    "region": "ap-northeast-1",
    (中略)
  }
}

import { Stack, StackProps, CfnOutput } from 'aws-cdk-lib';
import { Construct } from 'constructs';
import * as lambda from 'aws-cdk-lib/aws-lambda';

export class CdkLambdaUrlStack extends Stack {
  constructor(scope: Construct, id: string, props?: StackProps) {
    super(scope, id, props);

    const hello = new lambda.Function(this, 'HelloHandler', {
      runtime: lambda.Runtime.NODEJS_14_X,
      code: lambda.Code.fromAsset('lambda'),
      handler: 'hello.handler'
    });

    const fnUrl = hello.addFunctionUrl({
      authType: lambda.FunctionUrlAuthType.NONE,
      cors: {
        allowedMethods: [lambda.HttpMethod.ALL],
        allowedOrigins: ["*"],
      },
    });

    new CfnOutput(this, 'FunctionUrl', {
      value: fnUrl.url
    });
  }
}

$ mkdir lambda && touch lambda/hello.js

exports.handler = async function(event) {
    console.log("request:", JSON.stringify(event, undefined, 2));
  
    return {
      statusCode: 200,
      headers: { "Content-Type": "text/plain" },
      body: `Hello, Serverless!`
    };
};

$ cdk synth

$ cdk bootstrap
:
:
✅  Environment aws://<AWSアカウント>/ap-northeast-1 bootstrapped (no changes).

$ cdk deploy
:
:
Outputs:
CdkLambdaUrlStack.FunctionUrl = https://3dmzvqsb6fjzmnzdkqjqmetb4a0hreyn.lambda-url.ap-northeast-1.on.aws/
:
:
✨  Total time: 71.23s

$ cdk watch

exports.handler = async function(event) {
    console.log("request:", JSON.stringify(event, undefined, 2));
  
    return {
      statusCode: 200,
      headers: { "Content-Type": "text/plain" },
      body: `Hello, Serverless!
        \nrequest payload:\n${JSON.stringify(event, undefined, 2)}`
    };
};

#cdk watchしているターミナルセッション
Detected change to 'lambda/hello.js' (type: change). Triggering 'cdk deploy'
:
✨  Total time: 5.72s

Hello, Serverless!
      
request payload:
{
  "version": "2.0",
  "routeKey": "$default",
  "rawPath": "/",
  "rawQueryString": "",
  "headers": {
    "sec-fetch-mode": "navigate",
    "sec-fetch-site": "cross-site",
    "accept-language": "ja,en-US;q=0.9,en;q=0.8,hu;q=0.7",
    "x-forwarded-proto": "https",
    "x-forwarded-port": "443",
    "x-forwarded-for": "xxx.xxx.xxx.xxx",
    "sec-fetch-user": "?1",
    "accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9",
    "sec-ch-ua": "\" Not A;Brand\";v=\"99\", \"Chromium\";v=\"100\", \"Google Chrome\";v=\"100\"",
    "sec-ch-ua-mobile": "?0",
    "x-amzn-trace-id": "Root=1-6273c271-12e1f1fe5aba4371516b744e",
    "sec-ch-ua-platform": "\"macOS\"",
    "host": "3dmzvqsb6fjzmnzdkqjqmetb4a0hreyn.lambda-url.ap-northeast-1.on.aws",
    "upgrade-insecure-requests": "1",
    "accept-encoding": "gzip, deflate, br",
    "sec-fetch-dest": "document",
    "user-agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.127 Safari/537.36"
  },
  "requestContext": {
    "accountId": "anonymous",
    "apiId": "3dmzvqsb6fjzmnzdkqjqmetb4a0hreyn",
    "domainName": "3dmzvqsb6fjzmnzdkqjqmetb4a0hreyn.lambda-url.ap-northeast-1.on.aws",
    "domainPrefix": "3dmzvqsb6fjzmnzdkqjqmetb4a0hreyn",
    "http": {
      "method": "GET",
      "path": "/",
      "protocol": "HTTP/1.1",
      "sourceIp": "39.110.219.221",
      "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.127 Safari/537.36"
    },
    "requestId": "960ac841-7b8b-4feb-b7fc-f8c29e0cdf2d",
    "routeKey": "$default",
    "stage": "$default",
    "time": "05/May/2022:12:26:25 +0000",
    "timeEpoch": 1651753585437
  },
  "isBase64Encoded": false
}

exports.handler = async function(event) {
    console.log("request:", JSON.stringify(event, undefined, 2));
  
    return {
      statusCode: 200,
      headers: { "Content-Type": "text/plain" },
      body: `Hello, Serverless!
        \npath: ${event.requestContext.http.path}
        \nfrom: ${event.requestContext.http.sourceIp}
        \ncookies: ${event.cookies}
        \nbody: ${event.isBase64Encoded ? Buffer.from(event.body, 'base64').toString() : event.body}
        \nrequest payload:\n${JSON.stringify(event, undefined, 2)}`
    };
};

Hello, Serverless!
        
path: /tenant-a/user-a
        
from: xxx.xxx.xxx.xxx
        
cookies: SESSION=xxxxxxxx
        
body: ----------------------------002623005989495685913338
Content-Disposition: form-data; name="whoami"

yoshidashingo
----------------------------002623005989495685913338--

        
request payload:
{
  "version": "2.0",
  "routeKey": "$default",
  "rawPath": "/tenant-a/user-a",
  "rawQueryString": "",
  "cookies": [
    "SESSION=xxxxxxxx"
  ],
  "headers": {
    "x-amzn-trace-id": "Root=1-6273c75d-063bc336309f79ac73770d04",
    "cookie": "SESSION=xxxxxxxx",
    "x-forwarded-proto": "https",
    "postman-token": "b2ee7f00-51f1-4fb5-b6b9-80163ef2ac3a",
    "host": "5gavmkcouhzi3uv7bkqytxv4u40ivtss.lambda-url.ap-northeast-1.on.aws",
    "x-forwarded-port": "443",
    "content-type": "multipart/form-data; boundary=--------------------------002623005989495685913338",
    "x-forwarded-for": "xxx.xxx.xxx.xxx",
    "accept-encoding": "gzip, deflate, br",
    "accept": "*/*",
    "user-agent": "PostmanRuntime/7.29.0"
  },
  "requestContext": {
    "accountId": "anonymous",
    "apiId": "5gavmkcouhzi3uv7bkqytxv4u40ivtss",
    "domainName": "5gavmkcouhzi3uv7bkqytxv4u40ivtss.lambda-url.ap-northeast-1.on.aws",
    "domainPrefix": "5gavmkcouhzi3uv7bkqytxv4u40ivtss",
    "http": {
      "method": "POST",
      "path": "/tenant-a/user-a",
      "protocol": "HTTP/1.1",
      "sourceIp": "xxx.xxx.xxx.xxx",
      "userAgent": "PostmanRuntime/7.29.0"
    },
    "requestId": "59671e53-7ef1-4662-9c13-932ae75699d0",
    "routeKey": "$default",
    "stage": "$default",
    "time": "05/May/2022:12:47:25 +0000",
    "timeEpoch": 1651754845241
  },
  "body": "LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLTAwMjYyMzAwNTk4OTQ5NTY4NTkxMzMzOA0KQ29udGVudC1EaXNwb3NpdGlvbjogZm9ybS1kYXRhOyBuYW1lPSJ3aG9hbWkiDQoNCnlvc2hpZGFzaGluZ28NCi0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0wMDI2MjMwMDU5ODk0OTU2ODU5MTMzMzgtLQ0K",
  "isBase64Encoded": true
}