This is a first experiment to compile the Rust implementation of hypercore-protocol to WASM for use in browsers. At the moment, this is a minimal demo that only includes the wire protocol part (with all transport crypto) but not the persistence and verification parts (i.e. the hypercore crate).
- Update 2021-03-03: Cleaned the code and fixed README
- Update 2021-03-02: I wrote this some time back, now updated it roughly to the current dev branch of hypercore-protocol-rs. and pushed it to share and invite others to experiment with this
What this does (in Rust compiled to WASM):
- Fetch a key, encoded as hex string, from
/key
- Open a Websocket to localhost:9000
- Open a hypercore-protocol stream on the websocket
- Open a channel for the key that was fetched before
- Load all data blocks, and display them on the page (as a string in a
pre
element)
A Node.js server has the simple demo backend:
- Create a hypercore feed in-memory
- Append the contents of this README file
- Open an HTTP server
- On
/key
send the hypercore's key as a hex string - Serve the static files (index.html, index.js from this dir plus the WASM created through wasm-pack in
/pkg
) - On other requests, open a websocket connection and pipe it to the replication stream of the hypercore
cargo build
wasm-pack build --dev --target web
cd server
yarn
node server.js
# open http://localhost:9000
If it works, this should display this README in the browser, loaded over hypercore-protocol in Rust in WASM :-)
Check the browser console for some logs. It currently needs quite a while until the content is displayed, I don't know yet why this is.