档案库 · 开发与企业工具 · 产品决策 · 2020–2026
22120押注你的浏览历史足以成为离线互联网；HN获537分，现转为付费产品TDF
一个Chrome工具，记录你访问的每个页面并离线重放，2020年在HN获得537分；到2026年，其作者出售了付费的继任产品TDF。
22120 (DownloadNet / DOSAYGO)
做的是什么生意
22120 is a self-hosted personal web archive: a tool that attaches to Chrome through the DevTools Protocol, caches the pages a user visits while they browse, and replays the archive back from the user's own disk, so browsing history becomes an offline, searchable internet.
起因
The author, posting on HN as graderjs, said the idea came to him suddenly while he was doing lots of work in Chrome DevTools: he built it to see if it was possible, and the first version took very little time. He launched the repo c9fe/22120 on 2020-11-11 with a Show HN promising a self-hosted offline internet built from your browsing history, with archives you could organise yourself and version in git.
经过
The launch drew 537 points and 158 comments. Commenters said they wanted it for planes and camping, tested it on a highly interactive site and found it worked, and pressed on the gaps: no Firefox support, no video, audio or websockets, and an archive that needs the browser running to capture. One commenter traced the licence churning MIT to AGPL to a commercial-only licence within weeks of launch. Over the following years the project grew into DownloadNet (dn), and by the 2026-09-05 crawl the repository, now at DO-SAY-GO/tdf with 3.9k stars and 146 forks, announced that dn had grown into TDF: a new client, a new archive format and a new capture architecture.
结果
The project is not gone, it is productized: the README states the repo is no longer an open-source codebase and is the public home of the TDF product line, sold under DOSAYGO Corporation. Tree Grower captures live browsing sessions into .tdf archives as a $39 one-time purchase (three-year licence, up to three devices), Tree Player opens them for free, and the old dn v4.5 is preserved as unsupported legacy.
背景
22120的赌注是你自己的浏览历史就足以成为互联网。该工具通过DevTools协议附加到Chrome，缓存用户浏览时访问的每个页面，并从用户自己的磁盘重放存档——一个自托管的离线互联网，存档可自行整理并在git中管理。
作者在HN上以graderjs发帖称，他在Chrome DevTools工作时突然有此想法，构建它只是为了看看是否可行，第一版用时很少。Show HN于2020-11-11发布，获得537分和158条评论，评论者想用于飞机和露营，并称在高度交互的网站上也能正常工作。
局限也同样明显：仅支持Chrome，没有视频、音频或WebSocket，捕获需要浏览器始终运行，而且许可在几周内从MIT变到AGPL再到仅限商业，被一位评论者注意到。随后几年，项目变成DownloadNet（dn）再变成TDF；2026-09-05抓取显示仓库已转让给DO-SAY-GO/tdf，拥有3.9k星、146个fork和240次提交。
结果是产品化而非关闭：仓库声明不再开源，Tree Grower以39美元一次定价出售，许可证为期三年，Tree Player免费，且在DOSAYGO公司下旧版dn v4.5被保留为旧版。
这件事要成立，得有什么
- 切入点正是Chrome自身的DevTools协议：不需要代理、扩展或重新获取——每个响应都在浏览器自身的抓取周期内被捕获，这就是为什么即使是交互式页面也能重放。
- 它解决的是真实的问题而非假设：评论者描述了航班、露营和不稳定连接，正需要一个近期浏览的自托管副本。
- 作者没有强推商业模式，而是顺应关注度：Patreon式的支持和后来的付费原生产品，源于一个先证明人们喜爱它的工具。
- 许可变动在几周内就被评论者发现，从第一天起就显示了商业张力——来自HN的免费喜爱与作者明确表达赚钱意愿之间的矛盾。
可借鉴之处
一个连作者都没想到的工具可以超越其最初形式：22120的DevTools把戏成为DownloadNet，然后无需风险投资就成为付费的闭源TDF产品线。
后续进展
截至2026-09-05，该项目在DOSAYGO公司下以TDF 1.0形式存在：trees.dosaygo.com以39美元一次的价格销售Tree Grower（最多三台设备，三年期，当前v1.1.3），并为macOS、Windows和Linux提供免费Tree Player，同时github.com/DO-SAY-GO/tdf（3.9k星、146个fork、240次提交）记录了从dn v4.5到闭源.tdf格式的演变，旧版dn作为旧版保留。材料中未记录收入或资金数据，只有39美元的许可价格。
资料来源
- Show HN: Self-hosted offline Internet from your browsing history
- DO-SAY-GO/tdf — TDF Tree Document Format (formerly 22120/DownloadNet)
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