Negative Space: HTTP
- HTTP headers
- It’s hard to understand how cookies work and how much information from web visitors can be trusted without understanding how browsers and servers communicate.
- Override the Host: header when using PHP’s readfile
- It is possible to specify HTTP headers when using URLs with PHP’s file-oriented functions such as readfile.
- Using ETag and If-Modified-Since
- In the article on grabbing an RSS feed, I mentioned that if you’re grabbing a feed more than once a day, you should pay attention to the ETag and the If-Modified-Since headers. Here’s how to do that.
- What You Want
- What are you going to want once you get to the infobahn?
