Add a
True-Client-IP
header to the request
The following example function adds a True-Client-IP
HTTP header to the
request, with the IP address of the viewer as the header’s value. When CloudFront sends a
request to an origin, the origin can determine the IP address of the CloudFront host that sent
the request but not the IP address of the viewer (client) that sent the original request
to CloudFront. This function adds the True-Client-IP
header so the origin can see
the IP address of the viewer.
Important
To make sure that CloudFront includes this header in origin requests, you must add it to the allowed headers list in an origin request policy.
This is a viewer request function.