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Effective URL: https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/lambda-at-the-edge.html
Submission: On November 12 via api from BE — Scanned from US
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Developer Guide Feedback Preferences AMAZON CLOUDFRONT DEVELOPER GUIDE * What is Amazon CloudFront? * Ways to use CloudFront * How CloudFront delivers content * CloudFront edge servers * Working with AWS SDKs * Get started * Set up your AWS account * Get started with a basic distribution * Get started with a secure static website * Configure distributions * Create a distribution * Distribution settings * Test a distribution * Update a distribution * Tag a distribution * Delete a distribution * Use continuous deployment to safely test changes * CloudFront continuous deployment workflow * Work with a staging distribution and continuous deployment policy * Monitor a staging distribution * Learn how continuous deployment works * Quotas and other considerations for continuous deployment * Use various origins * Use custom URLs * Add an alternate domain name * Move an alternate domain name to a different distribution * Remove an alternate domain name * Use wildcards in alternate domain names * Use WebSockets * Caching and availability * Improve your cache hit ratio * Using Origin Shield * Increase availability with origin failover * Manage cache expiration * Caching and query string parameters * Cache content based on cookies * Cache content based on request headers * Control the cache key with a policy * Understand cache policies * Create cache policies * Use managed cache policies * Understand the cache key * Control origin requests with a policy * Understand origin request policies * Create origin request policies * Use managed origin request policies * Add CloudFront request headers * Understand how origin request policies and cache policies work together * Add or remove response headers with a policy * Understand response headers policies * Create response headers policies * Use managed response headers policies * Request and response behavior * How CloudFront processes HTTP and HTTPS requests * Request and response behavior for Amazon S3 origins * Request and response behavior for custom origins * Request and response behavior for origin groups * Add custom headers to origin requests * How CloudFront processes range GETs * How CloudFront processes HTTP 3xx status codes from your origin * How CloudFront processes HTTP 4xx and 5xx status codes from your origin * Generate custom error responses * Configure error response behavior * Create a custom error page for specific HTTP status codes * Store objects and custom error pages in different locations * Change response codes returned by CloudFront * Control how long CloudFront caches errors * Add, remove, or replace content * Use file versioning to update or remove existing content * Customize file URLs * Specify a default root object * Invalidate files to remove content * Determine which files to invalidate * What you need to know when invalidating files * Invalidate files * Concurrent invalidation request maximum * Pay for file invalidation * Serve compressed files * Use AWS WAF protections * Enable AWS WAF for distributions * Manage AWS WAF security protections for CloudFront * Set up rate limiting * Disable AWS WAF security protections * Configure secure access and restrict access to content * Use HTTPS with CloudFront * Require HTTPS between viewers and CloudFront * Require HTTPS to a custom origin * Require HTTPS to an Amazon S3 origin * Supported protocols and ciphers between viewers and CloudFront * Supported protocols and ciphers between CloudFront and the origin * Use alternate domain names and HTTPS * Choose how CloudFront serves HTTPS requests * Requirements for using SSL/TLS certificates with CloudFront * Quotas on using SSL/TLS certificates with CloudFront (HTTPS between viewers and CloudFront only) * Configure alternate domain names and HTTPS * Determine the size of the public key in an SSL/TLS RSA certificate * Increase the quotas for SSL/TLS certificates * Rotate SSL/TLS certificates * Revert from a custom SSL/TLS certificate to the default CloudFront certificate * Switch from a custom SSL/TLS certificate with dedicated IP addresses to SNI * Restrict content with signed URLs and signed cookies * Restrict access to files * Specify trusted signers * Decide to use signed URLs or signed cookies * Use signed URLs * Create a signed URL using a canned policy * Create a signed URL using a custom policy * Use signed cookies * Set signed cookies using a canned policy * Set signed cookies using a custom policy * Linux commands and OpenSSL for base64 encoding and encryption * Code examples for signed URLs * Create a URL signature using Perl * Create a URL signature using PHP * Create a URL signature using C# and the .NET Framework * Create a URL signature using Java * Restrict access to an AWS origin * Restricting access to an AWS Elemental MediaPackage v2 origin * Restrict access to an AWS Elemental MediaStore origin * Restrict access to an AWS Lambda function URL origin * Restrict access to an Amazon Simple Storage Service origin * Restrict access to Application Load Balancers * Geographic restriction * Use field-level encryption to help protect sensitive data * Video on demand and live streaming video * Deliver video on demand * Deliver live streaming video * Use functions to customize at the edge * Differences between CloudFront Functions and Lambda@Edge * Customize with CloudFront Functions * Tutorial: Create a simple CloudFront function * Tutorial: Create a CloudFront function that uses key values * Write function code * Determine function purpose * Event structure * JavaScript runtime features * JavaScript runtime 1.0 features * JavaScript runtime 2.0 features * Helper methods for key value stores * Use async and await * Create functions * Test functions * Update functions * Publish functions * Associate functions with distributions * CloudFront KeyValueStore * Work with key value store * Create a key value store * Associate a key value store with a function * Update a key value store * Get a reference to a key value store * Delete a key value store * File format for key-value pairs * Work with key value data * Customize with Lambda@Edge * How Lambda@Edge works with requests and responses * Ways to use Lambda@Edge * Get started with Lambda@Edge * Tutorial: Basic Lambda@Edge function * Set up IAM permissions and roles * Write and create a Lambda@Edge function * Create a Lambda@Edge function * Edit a Lambda function * Add triggers for a Lambda@Edge function * CloudFront events as triggers * Choose the trigger event * Add triggers to a Lambda@Edge function * Test and debug * Delete functions and replicas * Event structure * Work with requests and responses * Example functions * Restrictions on edge functions * Restrictions on all edge functions * Restrictions on CloudFront Functions * Restrictions on Lambda@Edge * Reports, metrics, and logs * AWS billing and usage reports for CloudFront * Interpret your AWS bill and usage reports for CloudFront * View CloudFront console reports * View CloudFront cache statistics reports * View CloudFront popular objects reports * View CloudFront top referrers reports * View CloudFront usage reports * View CloudFront viewers reports * Monitor CloudFront metrics with Amazon CloudWatch * View CloudFront and edge function metrics * Create alarms * Download metrics data * Get metrics by using the CloudWatch API * CloudFront and edge function logging * Use standard logs (access logs) * Use real-time logs * Edge function logs * AWS CloudTrail logs * Track configuration changes with AWS Config * Security * Data protection * Identity and Access Management * How Amazon CloudFront works with IAM * Identity-based policy examples * AWS managed policies * Troubleshoot CloudFront identity and access * Logging and monitoring * Compliance validation * Resilience * Infrastructure security * Troubleshooting * Troubleshooting distribution issues * Troubleshooting error response status codes * HTTP 400 status code (Bad Request) * HTTP 401 status code (Unauthorized) * HTTP 403 status code (Permission Denied) * HTTP 404 status code (Not Found) * HTTP 405 status code (Method Not Allowed) * HTTP 412 status code (Precondition Failed) * HTTP 500 status code (Internal Server Error) * HTTP 502 status code (Bad Gateway) * HTTP 503 status code (Service Unavailable) * HTTP 504 status code (Gateway Timeout) * Load testing CloudFront * Quotas * Code examples * Basics * Actions * CreateDistribution * CreateFunction * CreateInvalidation * CreateKeyGroup * CreatePublicKey * DeleteDistribution * GetCloudFrontOriginAccessIdentity * GetCloudFrontOriginAccessIdentityConfig * GetDistribution * GetDistributionConfig * ListCloudFrontOriginAccessIdentities * ListDistributions * UpdateDistribution * Scenarios * Delete signing resources * Sign URLs and cookies * CloudFront Functions examples * Add HTTP security headers * Add a CORS header * Add a cache control header * Add a true client IP header * Add an origin header * Add index.html to request URLs * Normalize query string parameters * Redirect to a new URL * Rewrite a request URI * Use key-value pairs * Validate a simple token * Document history Customize at the edge with Lambda@Edge - Amazon CloudFront AWSDocumentationAmazon CloudFrontDeveloper Guide CUSTOMIZE AT THE EDGE WITH LAMBDA@EDGE PDFRSS Lambda@Edge is an extension of AWS Lambda. Lambda@Edge is a compute service that lets you execute functions that customize the content that Amazon CloudFront delivers. You can author Node.js or Python functions in the Lambda console in one AWS Region, US East (N. Virginia). After you create the function, you can add triggers using the Lambda console or CloudFront console so that the functions run in AWS locations that are closer to the viewer, without provisioning or managing servers. Optionally, you can use Lambda and CloudFront API operations to set up your functions and triggers programmatically. Lambda@Edge scales automatically, from a few requests per day to thousands per second. Processing requests at AWS locations closer to the viewer instead of on origin servers significantly reduces latency and improves the user experience. TOPICS * How Lambda@Edge works with requests and responses * Ways to use Lambda@Edge * Get started with Lambda@Edge functions * Set up IAM permissions and roles for Lambda@Edge * Write and create a Lambda@Edge function * Add triggers for a Lambda@Edge function * Test and debug Lambda@Edge functions * Delete Lambda@Edge functions and replicas * Lambda@Edge event structure * Work with requests and responses * Lambda@Edge example functions Javascript is disabled or is unavailable in your browser. To use the Amazon Web Services Documentation, Javascript must be enabled. Please refer to your browser's Help pages for instructions. Document Conventions Work with key value data How Lambda@Edge works with requests and responses Did this page help you? - Yes Thanks for letting us know we're doing a good job! If you've got a moment, please tell us what we did right so we can do more of it. Did this page help you? - No Thanks for letting us know this page needs work. We're sorry we let you down. If you've got a moment, please tell us how we can make the documentation better. DID THIS PAGE HELP YOU? Yes No Provide feedback NEXT TOPIC: How Lambda@Edge works with requests and responses PREVIOUS TOPIC: Work with key value data NEED HELP? * Try AWS re:Post * Connect with an AWS IQ expert PrivacySite termsCookie preferences © 2024, Amazon Web Services, Inc. or its affiliates. All rights reserved. ON THIS PAGE