Dirk Taggesell wrote:
Hi folks, there's a web-server, that sends no info about caching or expiry of documents. That is the http header received while fetching a flash applet: HTTP/1.x 200 OK Date: Fri, 09 Nov 2007 15:26:46 GMT Server: Jetty/5.1.x (Mac OS X/10.4.9 i386 java/1.5.0_07 Content-Type: application/x-shockwave-flash Content-Length: 60749 Last-Modified: Wed, 07 Nov 2007 14:18:36 GMT Accept-Ranges: bytes Does this violate the http standard? Is a web-server required to send infos about document lifetime along with a document? Thanks for helping me.
Max-Age and Expires are optional headers. Squid uses a percentage of the objects age (calculated from the Last-Modified date) to determine object freshness.
See http://wiki.squid-cache.org/SquidFaq/InnerWorkings#head-42f0582290981fb15dd7d7edd3d42ae8c52fa317 for more details.
Chris
