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import { CfnOutput, Duration, RemovalPolicy } from "aws-cdk-lib";
import {
Certificate,
type ICertificate,
} from "aws-cdk-lib/aws-certificatemanager";
import {
Distribution,
type ErrorResponse,
FunctionCode,
FunctionEventType,
Function as LambdaFunction,
OriginAccessIdentity,
ViewerProtocolPolicy,
} from "aws-cdk-lib/aws-cloudfront";
import { S3BucketOrigin } from "aws-cdk-lib/aws-cloudfront-origins";
import { ARecord, HostedZone, RecordTarget } from "aws-cdk-lib/aws-route53";
import { CloudFrontTarget } from "aws-cdk-lib/aws-route53-targets";
import {
BlockPublicAccess,
Bucket,
BucketAccessControl,
BucketEncryption,
HttpMethods,
} from "aws-cdk-lib/aws-s3";
import { BucketDeployment, Source } from "aws-cdk-lib/aws-s3-deployment";
import type { Construct } from "constructs";
import {
CustomStack,
type CustomStackProps,
type DomainConfig,
} from "./customStack";
export interface StaticWebsiteStackProps extends CustomStackProps {
domains: DomainConfig[];
distFolderPath: string;
}
export class StaticWebsiteStack extends CustomStack {
constructor(scope: Construct, props: StaticWebsiteStackProps) {
super(scope, props);
Iif (!props.domains || props.domains.length === 0) {
throw new Error("At least one domain configuration is required");
}
const primaryDomain = props.domains[0];
const primaryFullDomainName =
primaryDomain.subdomain && primaryDomain.subdomain.length > 0
? [primaryDomain.subdomain, primaryDomain.domainName]
.join(".")
.toLowerCase()
: primaryDomain.domainName.toLowerCase();
const allDomainNames = props.domains.map((domain) =>
domain.subdomain && domain.subdomain.length > 0
? `${domain.subdomain}.${domain.domainName}`.toLowerCase()
: domain.domainName.toLowerCase(),
);
const certificateMap = new Map<string, ICertificate>();
for (const domain of props.domains) {
Eif (!certificateMap.has(domain.certificateId)) {
const certificateArn = `arn:aws:acm:us-east-1:${props.env?.account}:certificate/${domain.certificateId}`;
certificateMap.set(
domain.certificateId,
Certificate.fromCertificateArn(
this,
`certificate-${domain.certificateId}`,
certificateArn,
),
);
}
}
const primaryCertificate = certificateMap.get(primaryDomain.certificateId);
Iif (!primaryCertificate) {
throw new Error(
`Certificate not found for ${primaryDomain.certificateId}`,
);
}
const loggingBucket = new Bucket(this, "logging-bucket", {
accessControl: BucketAccessControl.LOG_DELIVERY_WRITE,
publicReadAccess: false,
versioned: false,
removalPolicy: RemovalPolicy.DESTROY,
bucketName: `${primaryFullDomainName}-logs`,
autoDeleteObjects: true,
blockPublicAccess: BlockPublicAccess.BLOCK_ALL,
encryption: BucketEncryption.S3_MANAGED,
enforceSSL: true,
lifecycleRules: [
{
id: "DeleteOldLogs",
expiration: Duration.days(90),
enabled: true,
},
],
});
const bucketWebsite = new Bucket(this, "static-website-bucket", {
accessControl: BucketAccessControl.PRIVATE,
publicReadAccess: false,
versioned: false,
removalPolicy: RemovalPolicy.DESTROY,
bucketName: primaryFullDomainName,
autoDeleteObjects: true,
blockPublicAccess: BlockPublicAccess.BLOCK_ALL,
encryption: BucketEncryption.S3_MANAGED,
cors: [
{
allowedMethods: [HttpMethods.GET, HttpMethods.HEAD],
allowedOrigins: ["*"],
allowedHeaders: ["*"],
},
],
enforceSSL: true,
serverAccessLogsBucket: loggingBucket,
serverAccessLogsPrefix: "s3-access-logs/",
});
const originAccessIdentity = new OriginAccessIdentity(
this,
"originAccessIdentity",
{
comment: `Setup access from CloudFront to the bucket ${primaryFullDomainName} (read)`,
},
);
bucketWebsite.grantRead(originAccessIdentity);
const errorResponses: ErrorResponse[] = [];
const errorResponse403: ErrorResponse = {
httpStatus: 403,
responseHttpStatus: 200,
responsePagePath: "/index.html",
ttl: Duration.seconds(10),
};
const errorResponse404: ErrorResponse = {
httpStatus: 404,
responseHttpStatus: 200,
responsePagePath: "/index.html",
ttl: Duration.seconds(10),
};
errorResponses.push(errorResponse403, errorResponse404);
const distribution = new Distribution(this, "distribution", {
domainNames: allDomainNames,
defaultBehavior: {
origin: S3BucketOrigin.withOriginAccessIdentity(bucketWebsite, {
originAccessIdentity: originAccessIdentity,
}),
viewerProtocolPolicy: ViewerProtocolPolicy.REDIRECT_TO_HTTPS,
functionAssociations: [
{
eventType: FunctionEventType.VIEWER_REQUEST,
function: new LambdaFunction(
this,
`${primaryFullDomainName}-url-rewrite`.toLowerCase(),
{
code: FunctionCode.fromFile({
filePath: join(__dirname, "cloudfront-url-rewrite.js"),
}),
},
),
},
],
},
defaultRootObject: "index.html",
certificate: primaryCertificate,
errorResponses: errorResponses,
enableLogging: true,
logBucket: loggingBucket,
logFilePrefix: "cloudfront-logs/",
});
new BucketDeployment(this, "deploy-static-website", {
sources: [Source.asset(props.distFolderPath)],
destinationBucket: bucketWebsite,
distribution,
distributionPaths: ["/*"],
});
const aliasRecords: ARecord[] = [];
for (const [index, domainConfig] of props.domains.entries()) {
const fullDomainName =
domainConfig.subdomain && domainConfig.subdomain.length > 0
? `${domainConfig.subdomain}.${domainConfig.domainName}`.toLowerCase()
: domainConfig.domainName.toLowerCase();
const zoneLogicalId =
index === 0
? "publicHostedZone-0"
: `hostedZone-${fullDomainName.replace(/[.-]/g, "")}`;
const zoneFromAttributes = HostedZone.fromHostedZoneAttributes(
this,
zoneLogicalId,
{
zoneName: domainConfig.domainName,
hostedZoneId: domainConfig.hostedZoneId,
},
);
const recordLogicalId =
index === 0
? "webDomainRecord-0"
: `webDomainRecord-${fullDomainName.replace(/[.-]/g, "")}`;
const aliasRecord = new ARecord(this, recordLogicalId, {
zone: zoneFromAttributes,
recordName: fullDomainName,
target: RecordTarget.fromAlias(new CloudFrontTarget(distribution)),
});
aliasRecords.push(aliasRecord);
}
new CfnOutput(this, "CloudFrontDistributionDomainName", {
value: distribution.distributionDomainName,
description: "CloudFront distribution domain",
exportName: `${this.getCloudFormationRepoName()}-${props.envName}-CdnDomainName`,
});
new CfnOutput(this, "DnsRecordName", {
value: aliasRecords[0].domainName || allDomainNames[0],
description: "The DNS record name (primary)",
exportName: `${this.getCloudFormationRepoName()}-${props.envName}-AliasRecord`,
});
}
}
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