# LambdaFunctionAssociation
<a name="API_LambdaFunctionAssociation"></a>

A complex type that contains a Lambda@Edge function association.

## Contents
<a name="API_LambdaFunctionAssociation_Contents"></a>

 ** EventType **   <a name="cloudfront-Type-LambdaFunctionAssociation-EventType"></a>
Specifies the event type that triggers a Lambda@Edge function invocation. You can specify the following values:  
+  `viewer-request`: The function executes when CloudFront receives a request from a viewer and before it checks to see whether the requested object is in the edge cache.
+  `origin-request`: The function executes only when CloudFront sends a request to your origin. When the requested object is in the edge cache, the function doesn't execute.
+  `origin-response`: The function executes after CloudFront receives a response from the origin and before it caches the object in the response. When the requested object is in the edge cache, the function doesn't execute.
+  `viewer-response`: The function executes before CloudFront returns the requested object to the viewer. The function executes regardless of whether the object was already in the edge cache.

  If the origin returns an HTTP status code other than HTTP 200 (OK), the function doesn't execute.
Type: String  
Valid Values: `viewer-request | viewer-response | origin-request | origin-response`   
Required: Yes

 ** LambdaFunctionARN **   <a name="cloudfront-Type-LambdaFunctionAssociation-LambdaFunctionARN"></a>
The ARN of the Lambda@Edge function. You must specify the ARN of a function version; you can't specify an alias or \$1LATEST.  
Type: String  
Required: Yes

 ** IncludeBody **   <a name="cloudfront-Type-LambdaFunctionAssociation-IncludeBody"></a>
A flag that allows a Lambda@Edge function to have read access to the body content. For more information, see [Accessing the Request Body by Choosing the Include Body Option](https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/lambda-include-body-access.html) in the Amazon CloudFront Developer Guide.  
Type: Boolean  
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/cloudfront-2020-05-31/LambdaFunctionAssociation) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/cloudfront-2020-05-31/LambdaFunctionAssociation) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/cloudfront-2020-05-31/LambdaFunctionAssociation)