Hypertext
Promote your Onion site with the Onion-Location HTTP header
A new HTTP header enables websites to redirect their visitors using the Tor Browser to their more secure Onion site.
Latest
Review
Genuine Roomba replacement parts vs off-brand clones
I bought authentic and off-brand Roomba 900-series replacement parts to compare their perceived quality. The differences are quite small.
Apache HTTPD
Fun with Apache HTTPD and subrequest variable inconsistencies
Why does the REQUEST_URI variable return /index.html and not / when requesting a directory? Blame it on the subrequest for the DirectoryIndex file.
Privacy
How to block web browser-based localhost port-scans
Websites are port-scanning your localhost. Here’s how to stop random websites from knowing what services are running on your device.
Image Files
Embed XMP sidecars into image files with embed_xmp
Here’s my new utility program and Ruby library for embedding XMP sidecar files (.xmp/.xml) into JPEG, PNG, SVG, and WebP image files.
Security
Google Authenticator enables device-transfers, but no export options
Two-factor authentication requires users to commit to storing a secret code indefinitely. Popular apps lack tools to back up and data transfer those secrets.
P2P
P2P apps’ connection amnesia makes them less fault-tolerant
Peer-to-peer apps forget the IP addresses it communicated with in the last session and rely on peer-discovery all the time. Caching can make them more robust.
HTML
Make native lazy-loading images load more eagerly
A tutorial on how to load native lazy-loading images earlier in Safari and Firefox. Speed up page loading while keeping visitors from seeing loading images.
Web Browsers
Everything you need to know about Night mode in Samsung Internet
Night mode in Samsung browser explained. How it breaks page contrast and accessibility, pastelify SVG colors, and why web developers can’t do anything about it.
P2P
Four P2P distribution tools for Git repositories compared
Comparing how P2P protocols like BitTorrent, Dat, and IPFS can help you distribute your Git repositories without depending on a central server.
Linux
How I recovered a lost email from my email client’s memory
A bug caused 30 minutes of work on an email to disappear. However, I was able to recover it by poking around in the process memory using gdb/gcore. Here’s how.
Copyright
New font with Unicode-compatible Creative Commons license symbols
Unicode 13 introduced Creative Commons license symbols. Here’s a small free font file with the new characters, so you can use them on your computer or website.