Cap'n Web: New JavaScript-Native RPC Protocol for Web Browsers and Servers
By
jgrahamc
Front-window bakery material. Catches the eye, delivers the goods.
Summary
Cap'n Web is a new open-source RPC (Remote Procedure Call) protocol designed specifically for web browsers and servers. Created as a spiritual successor to Cap'n Proto, it's implemented in pure TypeScript and eliminates the need for schemas and boilerplate code. The protocol operates as an object-capability system, providing the expressive power of Cap'n Proto while being optimized for the web stack. It works similarly to JavaScript-native RPC systems in Cloudflare Workers, making it particularly suitable for modern web development environments.
Key quotes
· 4 pulledCap'n Web is a spiritual sibling to Cap'n Proto, an RPC protocol I (Kenton) created a decade ago, but designed to play nice in the web stack.
Like Cap'n Proto, it is an object-capability protocol. ("Cap'n" is short for "capabilities and".) We'll get into this more below, but it's incredibly powerful.
Unlike Cap'n Proto, Cap'n Web has no schemas. In fact, it has almost no boilerplate whatsoever.
This means it works more like the JavaScript-native RPC system in Cloudflare Workers.
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