Dynamically rehosting at least one or more elements of a first resource originally hosted at an origin server. A dynamic web content transformation server receives a first HTTP request from an Internet client for the first resource that includes a value in a host header field that refers to the dynamic web content transformation server. The content transformation server transforms the first HTTP request including changing the value in the host header field to refer to the origin server, and transmits the transformed HTTP request to the origin server. The content transformation server receives an HTTP response from the origin server that includes the first resource that includes a client-side script that, when executed by the Internet client, makes a second HTTP request for a second resource hosted at the origin server. The content transformation server automatically transforms the HTTP response such that the client-side script, when executed by the Internet client, makes the second HTTP request for the second resource at the dynamic web content transformation server, and the content transformation server transmits the transformed HTTP response to the Internet client.