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...download link (and notes) : https://sourceforge.net/projects/websocketserverinapatch/files/ "websocket-server in a patch.pd" single Pd file contains a reusable and fully documented websocket server, meant as an easy way to experiment with Pure Data <-> web-browsers communications through websockets, without the need of other software (like node.js or python) or any specific external to compile (just one deken library is required). A demo is included in the same patch : 'Flames', a simple cross-browser, multi-touch and multi-player graphical interface which makes Pd play creepy sounds :) Just try it : In Pd (vanilla) on Windows, Mac or Linux, install the 'mrpeach' library via 'Help->Find externals' menu, then open the patch and fire any recent web-browsers (on same machine or other computer, smartphone or tablet on same local network) with the URL provided at the top of main windows, and you're good to go !

...For event-based API, it is suitable for non-blocking reactor pattern style. You can set callbacks in various events. For frame-based API, you can send WebSocket frame directly. Wslay only supports data transfer part of WebSocket protocol and does not perform opening handshake in HTTP. Wslay does not perform any I/O operations for its own. Instead, it offers callbacks for them. This makes Wslay independent on any I/O frameworks, SSL, sockets, etc. This makes Wslay protable across various platforms and the application authors can choose freely I/O frameworks.