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?
More Information
- A Plea to Preserve Meaningful Referrer Headers
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“Google is pushing a new stricter default for the Referrer-Policy header under the veil of privacy. Not only have they implemented this default in Chrome, they are also lobbying for everyone to configure it in their web servers… This article is a plea not to blindly follow suit by nailing shut the referrer header in every possible case, because that may do more harm than good.”
