Device-type breakdown of Checker nodes

[bajtos]

Collect & visualise data to answer questions like "how many nodes are running on Raspberry Pi".

[bajtos]

• Browsers send device type in the user agent string. There are npm packages to extract the device type from the user-agent string, but it's pretty complex. See e.g. here: https://github.com/mcollina/my-ua-parser/blob/0ff5baa346ccae60510375da56c676b6f507c710/ua-parser.js#L393-L708
• Here is the value I get from the UA string reported by my Station running on macOS: device: { vendor: 'Apple', model: 'Macintosh', type: undefined }
• The headless checker nodes are running on Node.js, which sets the user agent to node. There is no device information, which means we won't recognise RaspberryPIs.
• Zinnia sets the UA string to something like zinnia/0.10.2 spark/main - there is no device info either.

[bajtos]

A Rust crate that may give us some of the information we are looking for: https://crates.io/crates/sysinfo

[bajtos]

Chromium code building the user-agent string on Android:

https://github.com/chromium/chromium/blob/10f911caab269be0085aca6c920ad4c24e7397c2/components/cronet/android/java/src/org/chromium/net/impl/UserAgent.java#L24-L63

https://github.com/chromium/chromium/blob/f7e00d86514b85827fd156cfc71993438c6e12e8/base/system/sys_info_android.cc#L65-L69

Android API:

https://developer.android.com/reference/android/os/Build#DEVICE

iOS & macOS API:

https://developer.apple.com/documentation/uikit/uidevice/model

Chromium on Linux:

https://github.com/chromium/chromium/blob/f7e00d86514b85827fd156cfc71993438c6e12e8/components/device_signals/core/common/linux/platform_utils_linux.cc#L50-L52

Chromium on Windows:

https://github.com/chromium/chromium/blob/f7e00d86514b85827fd156cfc71993438c6e12e8/components/device_signals/core/common/win/platform_utils_win.cc#L271-L273

https://github.com/chromium/chromium/blob/f7e00d86514b85827fd156cfc71993438c6e12e8/base/system/sys_info_win.cc#L296-L333

Chromium code search:
https://github.com/search?q=repo%3Achromium%2Fchromium+symbol%3AHardwareModelName&type=code

More resources related to Windows:

• https://learn.microsoft.com/en-us/windows/win32/properties/props-system-devices-modelname
• https://stackoverflow.com/questions/12300442/how-to-get-computer-manufacturer-and-model-from-windows-registry-in-c
• https://devblogs.microsoft.com/oldnewthing/20140106-00/?p=2163

Loosely related:

• https://crates.io/crates/mid