Web Caching

When you browse any web page ( google.com, yahoo.com, bing.com ) in modern web browser, if you inspect the request http headers, you can find cache-control : no-cache header. This header is always used in http response header. But why it is used in http request header, this article will tell you the reason.

When web browser request a web page from original web server, the request may go through serveral intermediary proxy or cdn servers like below picture. Each node in the chain ( includes both client browser, cdn proxy server and original web server ) can cache the requested web page resources follow their own cache policy …

How Web Caching Works In CDN ( Proxy ) Chain Use Cache-Control Http Header Read More »