Posts by John Graham-Cumming

The Sleepy User Agent

Published on by John Graham-Cumming.

From time to time a customer writes in and asks about certain requests that have been blocked by the CloudFlare WAF. Recently, a customer couldn’t understand why it appeared that some simple GET requests for their homepage were listed as blocked in WAF analytics. A sample request looked liked

Using HTTP/2 Server Push with PHP

Published on by John Graham-Cumming.

Two weeks ago CloudFlare announced that it was supporting HTTP/2 Server Push for all our customers. By simply adding a Link header to an HTTP response specifying preload CloudFlare would automatically push items to web browsers that support Server Push. To illustrate how easy this is I create a