# MessageReviewHandler
<a name="API_MessageReviewHandler"></a>

Configuration information for optional message review.

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

 ** fallbackResult **   <a name="ivs-Type-MessageReviewHandler-fallbackResult"></a>
Specifies the fallback behavior (whether the message is allowed or denied) if the handler does not return a valid response, encounters an error, or times out. (For the timeout period, see [ Service Quotas](https://docs.aws.amazon.com/ivs/latest/ChatUserGuide/service-quotas.html).) If allowed, the message is delivered with returned content to all users connected to the room. If denied, the message is not delivered to any user. Default: `ALLOW`.  
Type: String  
Valid Values: `ALLOW | DENY`   
Required: No

 ** uri **   <a name="ivs-Type-MessageReviewHandler-uri"></a>
Identifier of the message review handler. Currently this must be an ARN of a lambda function.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 170.  
Pattern: `$|^arn:aws:lambda:[a-z0-9-]+:[0-9]{12}:function:.+.*`   
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/ivschat-2020-07-14/MessageReviewHandler) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/ivschat-2020-07-14/MessageReviewHandler) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/ivschat-2020-07-14/MessageReviewHandler)