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There are a total of 57 HTTP Status Codes recognized by the Apache Web Server. Wouldn't you like to see what all those headers and their output, ErrorDocuments look like?
Using Cache-Control headers you can specify which types of proxies can cache certain content, and how long files should be cached.
Apache .htaccess Directives and Loaded Modules allowed on DreamHost Apache Server 2 Setups.
If you remove the Last-Modified and ETag header, you will totally eliminate If-Modified-Since and If-None-Match requests and their 304 Not Modified Responses.
By removing the ETag header, you disable caches and browsers from being able to validate files, so they are forced to rely on your Cache-Control and Expires header.
A first-time visitor to your page will make several HTTP requests to download all your sites files, but using the Expires header you make those files cacheable. This avoids unnecessary HTTP requests on subsequent page views.
If you examine the preferences dialog of any modern Web browser (like Internet Explorer, Safari or Mozilla), you'll probably notice a 'cache' setting. This lets you set aside a section of your computer's hard disk to store representations that you've seen, just for you. The browser cache works according to fairly simple rules. It will check to make sure that the representations are fresh, usually once a session (that is, the once in the current invocation of the browser).
Love that Tesla Model S
Ratpoison, a lean mean WM for Linux (urvxt), I love it
You understand, what I need to know is exactly what happens to the passengers in an elevator when it falls into emptiness - Einstein
It's not process, its content. That's what makes good products. -jobs
The power of the Web is in its universality. Access by everyone regardless of disability is an essential aspect. -Tim Berners-Lee
A strong free software movement focused on the principled issues of software freedom and a strong FSF in particular will determine what freedoms the next generation of computer users enjoy. At stake is no less than the next generation's autonomy. -Benjamin Mako Hill
The use of "hacker" to mean "security breaker" is a confusion on the part of the mass media. We hackers refuse to recognize that meaning, and continue using the word to mean someone who loves to program, someone who enjoys playful cleverness, or the combination of the two. See my article, On Hacking.
-- Richard M. Stallman
It's very simple - you read the protocol and write the code. -Bill Joy
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