A simple Google Chrome extension that shows if a page being served up via a Varnish web accelerator is fresh or not.
Currently this addon consists of a single toolbar button that changes state based on detected HTTP headers.
The button icon appears gray/disabled when no special HTTP headers are detected.
The button icon becomes Varnish-blue when the HTTP header Via is detected containing the string "varnish":
The button becomes red-ish in color when the HTTP header X-Cache is detected containing the string "MISS":
The button becomes green in color when the HTTP header X-Cache is detected containing the string "HIT":
The label text is updated to reflect the number of cache hits if the HTTP header X-Cache-Hits is present.