Overview
Use the Response Transformer policy to transform response headers before the response is sent to the client. You can add, remove, or modify response headers in your Proxy Endpoint responses.
Prerequisites
You can only apply this policy to your Proxy endpoints and Proxies.
Policy Execution Order
Transformation of response headers runs after the Proxy API is called. This policy runs with the Response Mapper.
Expression Enabled Fields in API Policies
All expression enabled fields take expressions from the SnapLogic Expression Language and the API Policy Manager functions.
Settings
Parameter Name | Description | Default Value | Example |
|---|---|---|---|
Label | Required. The name for the API policy. | Response Transformer | ReqTrans-TestShared |
When this policy should be applied | An expression enabled field that determines the condition to be fulfilled for the API policy to execute. | True | response.method == “POST” |
Headers to Add/Replace | The list of headers to add or replace into the response. If the name or value of an entry in the table is blank, no changes are made. | N/A | N/A |
Name | The name for the header to add or replace. | N/A | X-content-type-options |
Value | The value for the header. If this field is an expression, it can return a list to simulate the header being repeated multiple times in the original response. If the header in the original response was repeated multiple times, this new value replaces all of the original values. If the original values need to be preserved, this field should be an expression that gets the original value and returns a modified version. | N/A | nosniff |
Headers to Remove | The list of headers to remove from the response. The subfield Name functions the same way it does for Headers to Add/Replace. | N/A | x-content-age |
Status | Indicates whether the API policy is enabled or disabled. | Enabled | Disabled |
Use '-' (dash) instead of '_' (underscore) in header name as '_' is ignored and the header is not captured. '-' is internally transformed to '_' for you to map to the Pipeline parameter. For example, HTTP-ACCEPT instead of HTTP_ACCEPT.
Known Issues
APIM functions display in the expressions dropdown menu but do not actually work.