tag:blogger.com,1999:blog-337981662011-08-24T06:50:05.677ZRui Baptistanoreply@blogger.comBlogger81100tag:blogger.com,1999:blog-33798166.post-1158920967586560072006-09-22T10:28:00.000Z2006-09-22T10:29:27.596Z

Now my test pages have a how to and a much more intuitive interface: to figure what's going on there is no need to trace http headers, just watch the image — it is intended to change only when cache is not used. Also a reason to believe for my anti-msie friends was included. Before moving on to [script generated] dynamics the following tests will be done: Expires with no validator Last-Modified

Rui Baptistanoreply@blogger.com0tag:blogger.com,1999:blog-33798166.post-1158538659106946952006-09-18T00:16:00.000Z2006-09-19T21:36:06.210Z

This should be a post about using the html tag META with an equivalent to Expires to define an expiration time. But that makes no sense in most situations! Usually we want to say "check this every day" or "every 5 minutes" and that implies an expiration time relative to last access, something we can't do with META Expires — only absolute expiration times are possible. So it's time to move on.

Rui Baptistanoreply@blogger.com2tag:blogger.com,1999:blog-33798166.post-1158201565425400132006-09-14T02:38:00.000Z2006-09-14T02:39:25.436Z

Expiration date can be set in web server configuration for static resources [dynamic resources can have Expires set by scripts]. Apache Expires can be set in the configuration file [httpd.conf] or with .htaccess files. In any case expires_module must be active. While .htaccess files are more flexible, allowing changes without server restart [and sometimes are the only choice available], there is

Rui Baptistanoreply@blogger.com0tag:blogger.com,1999:blog-33798166.post-1157914612369994372006-09-10T18:56:00.000Z2006-09-15T19:16:05.476Z

What if you want your page to be checked once per day, whatever are browser settings? Or every time the page is visited, although this is a bad idea for statics? HTTP/1.0 has the Expires clause, that allows web servers to specify a date/time after which the entity should be considered out of date and checked by browsers. Using Expires  the web designer can control how fresh each entity is,

Rui Baptistanoreply@blogger.com0tag:blogger.com,1999:blog-33798166.post-1157826139265190372006-09-09T18:21:00.000Z2006-09-09T21:19:28.303Z

Opera [7.5] is very straightforward: for pages without explicit expiration it checks at regular, configurable periods of time starting on last check. Explorer [6.0] has 4 options: ever, never, per start or default. Per start means per instance: open other window and all stuff will be checked again. Default seems to be per start plus some heuristic checks, for entities without expiration. Netscape

Rui Baptistanoreply@blogger.com0tag:blogger.com,1999:blog-33798166.post-1157669819833958592006-09-07T22:56:00.000Z2006-09-08T12:54:16.766Z

This blog thing took me a big time with the template. Now main block and sideboard are adjustable to window width, with a max-width working in IE thanks to Svend Tofte — I dont like style hacks but this one is very clear and makes IE do something that it should be doing lta. Also a nice toggle system for logs was implemented, it is a little fat but allows multiple toggles in one post. Believe me,

Rui Baptistanoreply@blogger.com3tag:blogger.com,1999:blog-33798166.post-1157398644097898802006-09-04T19:36:00.000Z2006-09-15T19:14:56.553Z

With default configuration web servers and web browsers do a good job keeping "fresh" static documents near you, saving them in computer's hard disk. A web page that, with all related documents, would take one second to be fully downloaded from the web can be retrieved from disk in some milliseconds — about 100 times faster. This can be implemented through HTTP headers or equivalent HTML meta

Rui Baptistanoreply@blogger.com2tag:blogger.com,1999:blog-33798166.post-1157325151520458102006-09-03T23:09:00.000Z2006-09-04T00:46:16.610Z

Computer-related cache technology is the use of a faster and smaller memory type to accelerate a slower and larger memory type. Web pages and other documents are frequently cached closer to the client through browser, proxy, or server caches. By storing frequently accessed documents closer to the client, bandwidth consumption, server load, and latency can be reduced.Usually a cache of recently

Rui Baptistanoreply@blogger.com0