AWS 9월 웨비나 | AWS Lambda@Edge를 통한 엣지 컴퓨팅 서비스

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Oregon Govcloud
Ohio
N. Virginia
São Paulo
Ireland
Frankfurt
Mumbai
Beijing
Seoul
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Custom Origin
EC2 instance
web app
server
Elastic/Application
Load Balancing
Amazon S3
Bucket
CloudFront
Distribution
/image /web_source /login /api
D111111abcdef8.cloudfront.net/
API Gateway
API Endpoint

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SERVICES (ANYTHING)
데이터 상태
변경 시
엔드 포인트로
호출
자원 상태
변경 시
EVENT SOURCE FUNCTION
Node.js
Python
Java
C# 및
자체 라이브러리 패키징
다른 AWS서비스
실행
데이터 저장 및 분석

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Lambda@Edge
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Edge
Location
Edge
Location
Edge
Location
Edge
Location
Origin server
Edge
Location
Write once, run everywhere

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CloudFront cache
End user
Origin
server
Viewer request Origin request
Origin responseViewer response

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"config": {
"distributionId": "EXAMPLE”
},
"request": {
"uri": "/me.pic",
"method": "GET",
"httpVersion": "2.0",
"clientIp": "2001:cdba::3257:9652",
"headers": {
"User-Agent": ["Test Agent"],
"Host" : ["d2fadu0nynjpfn.cloudfront.net"]
}
}

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"config": {
"distributionId": "EDFDVBD6EXAMPLE ”
},
"response": {
"status": "200",
"statusDescription": "HTTP OK",
"httpVersion": "2.0",
"headers": {
"User-agent": [ "mozilla", "safari" ],
"Vary": [ "*" ]
}
…

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exports.handler = (event, context, callback) => {
const request = event.Records[0].cf.request,
userAgent = req.headers['User-Agent'] || '',
uri = req.uri,
i = uri.lastIndexOf('/'),
prefix = uri.slice(0, i);
let path = '/pc';
if(userAgent.some(e => e.includes(’Mobile'))) {
path = '/mobile';
}
req.uri = [uri.slice(0, i), path, uri.slide(i)].join('');
console.log(’Redirect to', req.uri, userAgent);
callbck(null, req);
}

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experts.handler = (event, content, callback) => {
const req = event.Records[0].cf.request;
if (/[A-Z]/.test(req.url)) {
cost old = req.uri
req.uri = req.uri.toLowerCase();
console.log(old, 'to lowercase', req.uri);
}
callback(null, req);
}
/2017/photos.png /2017/Photos.png

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const headers = event.Records[0].cf.response.headers;
const customHeaderName = 'X-Amz-Last-Modified';
const headerNameToBeChanged = 'Last-Modified';
if (headers[customHeaderName] !== undefined) {
headers[headerNameToBeChanged] = headers[customHeaderName];
}
callback(null, event.Records[0].cf.response);
};
}
Last-Modified X-Amz-Last-Modified

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const request = event.Records[0].cf.request;
const headers = request.headers;
……
const expCookieName = 'X-Exp-Name=';
const A = 'A';
const B = 'B';
const AObject = '/experiment-group/control-pixel.jpg';
const BObject = '/experiment-group/treatment-pixel.jpg';
Cookie = header.Cookie
……

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if (Cookie !== undefined) {
for (let i = 0; i < Cookie.length; i++) {
const expIndex = Cookie[i].indexOf(expCookieName);
if (expIndex > 0) {
if (Cookie[i][expIndex + expCookieName.length] === A) {
request.uri = AObject;
callback(null, request);
}
if (Cookie[i][expIndex + expCookieName.length] === B) {
request.uri = BObject;
callback(null, request);
}
}
}

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const request = event.Records[0].cf.request,
const uri = req.uri.subString(req.uri.lastIndexOf('/'));
const video = uri.replace(/.(html|htm)$/, '.mp4');
const res = {
status: '200’,
statusDesscription: 'HTTP OK',
httpVersion: req.httpVersion,
headers: {
'Content-Type': ['text/html'],
'Content-Encoding': ['UTF-8'],
},
body: html.replace(${SOURCE}, video)
};
callback(null, res);
}

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'use strict';
const headers = event.Records[0].cf.response.headers;
headers['Strict-Transport-Security'] = [{key: "Strict-Transport-Security", value: "max-age=31..."}];
headers['Content-Security-Policy'] = [{key: "Content-Security-Policy", value: "default-src..."}];
headers['X-Content-Type-Options'] = [{key: "X-Content-Type-Options", value: "nosniff"}];
headers['X-Frame-Options'] = [{key: "X-Frame-Options", value: "DENY"}];
headers['X-XSS-Protection'] = [{key: "X-XSS-Protection", value: "1; mode=block"}];
headers['Referrer-Policy'] = [{key: "Referrer-Policy", value: "no-referrer"}];
callback(null, event.Records[0].cf.response);
};
https://tozny.com/blog/making-browser-crypto-safe/
https://tozny.com/blog/secure-https-headers-lambda
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AWS 9월 웨비나 | AWS Lambda@Edge를 통한 엣지 컴퓨팅 서비스

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