wtf is public-binary-files-mirror?

Many useful software tools, like Helm, Kubectl, Istio, and others, are hosted on servers outside China. If you're downloading from within China, those downloads can be painfully slow. The public-binary-files-mirror project solves this by acting as a fast, local stand-in for those distant servers. It's essentially a shortcut that helps you grab the files you need without the wait. Using it is straightforward: you just take the original download link and add files.m.daocloud.io/ to the very beginning. For example, if you're trying to download a file from get.helm.sh, you'd swap that out for files.m.daocloud.io/get.helm.sh. The service works on a lazy-loading basis, meaning if a file hasn't been requested before, it fetches it from the original source, caches it for thirty days, and serves it to you. The first download might pause briefly while it grabs the file, but subsequent downloads by anyone are fast and unrestricted. The project also offers a separate endpoint for downloading large datasets and models from HuggingFace. This tool is aimed at developers, system administrators, and anyone setting up software infrastructure in China. The README provides concrete examples for several common scenarios, like installing Kubernetes deployment tools (Kubespray, KIND, K9S) and configuring Linux system updates for Debian, Ubuntu, Rocky Linux, and Alpine. If you're running a server or building a cluster and need to pull dozens of components from abroad, this service dramatically cuts down your waiting time, one cited example downloaded over 600MB of files in just 23 seconds. A couple of tradeoffs are worth noting. The service intentionally blocks media files like images, videos, and music (returning a 403 error for those formats), since it's designed specifically for software binaries, not general web content. Additionally, cached files expire after 30 days, so older files will need to be re-synced. But because it preserves the exact file hashes from the original sources, you can trust that what you download is identical to what you'd get from the original website.