My aim is to get socket.io to work with deno. Deno does have a standard library for web sockets, but that does not have a fail-over. I think it is possible to use the UNPKG service to use an NPM package in you deno program, but I seem to get the syntax wrong for importing socket.io:
import { serve } from "https://deno.land/std/http/server.ts";
import {Socket} from "https://unpkg.com/browse/[email protected]/dist/index.d.ts";
new Worker(new URL("worker.js", import.meta.url).href, { type: "module" });
const server = serve({ port: 3001 });
const app = new Application();
const io = Socket(3001);
// serve index page
if (req.url === "/") {
req.respond({
status: 200,
body: await Deno.open("./public/index.html"),
});
}
io.on("connection", (socket) => {
// either with send()
socket.send("Hello!");
// or with emit() and custom event names
socket.emit("greetings", "Hey!", { "ms": "jane" }, Buffer.from([4, 3, 3, 1]));
// handle the event sent with socket.send()
socket.on("message", (data) => {
console.log(data);
});
// handle the event sent with socket.emit()
socket.on("salutations", (elem1, elem2, elem3) => {
console.log(elem1, elem2, elem3);
});
});
I get the following error:
error: An unsupported media type was attempted to be imported as a module.
Specifier: https://unpkg.com/browse/[email protected]/dist/index.d.ts
MediaType: Unknown
It fails because you are importing a
.d.ts
file, which is a declaration file and essentially you can't run any code from - it's purely to support types.Instead you should replace
index.d.ts
withindex.js