Patrick Ecord
d3dd785921
Add Engine.send_file(name, mime, data) and MessageHandler.on_file. Files stream over each open RTC data channel as binary frames — M<json meta> · C<16-byte id><16KB chunk>… · E<id> — and reassemble on the receiver in arrival order (the channel is reliable+ordered). The data channel now distinguishes string (clipboard) from binary (file) messages. Files are direct-only — never relayed, matching prefer-direct. Transport trait gains start(...files) + a default-noop send_file (only RTC implements it). The agent saves received files to ~/Downloads; the apps stub on_file (receive UI is a follow-up). All MessageHandler impls updated. Proven by examples/file_demo.rs: A sends a 50KB blob (4 chunks), B reassembles it to identical bytes over RTC. Follow-ups: file transfer over LAN (same-network without RTC); attach/preview UI; progress + size cap. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
57 lines
1.9 KiB
Rust
57 lines
1.9 KiB
Rust
//! Proves serverless LAN sync: two engines with a DEAD server URL (so SSE and
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//! RTC cannot deliver) discover each other over mDNS and exchange a clipboard
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//! over plain TCP.
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//! cargo run --example lan_p2p
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//!
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//! If the message arrives, it can only have come via the LAN transport.
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use std::sync::mpsc;
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use std::time::Duration;
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use tethercore::{Engine, Message, MessageHandler};
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struct Collector(mpsc::Sender<Message>);
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impl MessageHandler for Collector {
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fn on_message(&self, msg: Message) {
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let _ = self.0.send(msg);
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}
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fn on_status(&self, _connected: bool) {}
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fn on_file(&self, _name: String, _mime: String, _data: Vec<u8>) {}
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}
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fn main() {
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// Unroutable server → SSE/RTC are dead; only LAN can carry the message.
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let dead = "http://127.0.0.1:1".to_string();
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let room = "lan-spike".to_string();
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let (tx, rx) = mpsc::channel();
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let a = Engine::new(dead.clone(), room.clone(), "peer-a".into(), "lan-a".into(), "LAN A".into(), "".into());
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a.start(Box::new(Collector(tx)));
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let b_from = "peer-b";
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let b = Engine::new(dead, room, b_from.into(), "lan-b".into(), "LAN B".into(), "".into());
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b.start(Box::new(Collector(mpsc::channel().0)));
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eprintln!("waiting for mDNS discovery + TCP connect…");
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std::thread::sleep(Duration::from_secs(4));
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let payload = "hello-over-lan";
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b.send(payload.to_string());
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match rx.recv_timeout(Duration::from_secs(6)) {
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Ok(m) if m.text == payload => {
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println!(
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"✅ serverless LAN delivery: text={:?} from={} source={}",
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m.text, m.from, m.source
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);
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}
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Ok(m) => println!("⚠️ unexpected: {m:?}"),
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Err(_) => {
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println!("❌ nothing received — mDNS may be blocked, or peers didn't connect");
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std::process::exit(1);
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}
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}
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a.stop();
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b.stop();
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}
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