# RuleTransform
<a name="API_RuleTransform"></a>

Information about a transform to apply to requests that match a rule. Transforms are applied to requests before they are sent to targets.

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

 ** Type **   
The type of transform.   
+  `host-header-rewrite` - Rewrite the host header.
+  `url-rewrite` - Rewrite the request URL.
Type: String  
Valid Values: `host-header-rewrite | url-rewrite`   
Required: Yes

 ** HostHeaderRewriteConfig **   
Information about a host header rewrite transform. This transform modifies the host header in an HTTP request. Specify only when `Type` is `host-header-rewrite`.  
Type: [HostHeaderRewriteConfig](API_HostHeaderRewriteConfig.md) object  
Required: No

 ** UrlRewriteConfig **   
Information about a URL rewrite transform. This transform modifies the request URL. Specify only when `Type` is `url-rewrite`.  
Type: [UrlRewriteConfig](API_UrlRewriteConfig.md) object  
Required: No

## See Also
<a name="API_RuleTransform_SeeAlso"></a>

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/elasticloadbalancingv2-2015-12-01/RuleTransform) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/elasticloadbalancingv2-2015-12-01/RuleTransform) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/elasticloadbalancingv2-2015-12-01/RuleTransform)