[uibuilderfe:socket-disconnect] Reason: transport close when receiving json from node-red

UnborN · 16 October 2021 10:53

Found this discussion on the socket.io github. Maybe its related

github.com/socketio/socket.io

v3 and v4 close socket if more than 1MB is sent (but v2 is fine)

opened 10:24AM - 28 May 21 UTC

closed 07:11AM - 14 Oct 22 UTC

Domiii

enhancement

**Describe the bug** * Everytime a certain amunt of data is sent by the clien…t, the socket disconnects instantly. * I am using socket.io@4.1.2 * Client in browser (latest Chrome) * Server on Node@16 ## Steps to reproduce * Connect to server * Let client send a packet that is at least `1e6` in size (code sample below) * You will see it disconnect instantly. ## Code Sample Socket.IO server version: `4.1.2` **Server** ```js import { Server } from "socket.io"; const io = new Server(3000, {}); io.on("connection", (socket) => { console.log(`connect ${socket.id}`); socket.on("disconnect", () => { console.log(`disconnected ${socket.id}`); }); socket.on("noop", (data) => { console.log(`noop received: ${data.length}`); }); }); ``` Socket.IO client version: `4.1.2` **Client** ```js import { io } from "socket.io-client"; const socket = io("ws://localhost:3000/", {}); socket.on("connect", () => { console.log(`connect ${socket.id}`); // NOTE: if you change N to 999000, it will NOT disconnect! const N = 1e6; const noopData = new Array(N).fill(1).join(''); socket.emit('noop', noopData); console.warn(`noop sent, N=${N}`); }); socket.on("disconnect", () => { console.log("disconnect"); }); ``` **Expected behavior** Don't disconnect arbitrarily. **Platform:** - Device: PC - OS: Windows10 **Further Analysis** * I find the issue to also exist in `socket.io@3`, but not in `socket.io@2`, which works just fine. * I debugged the issue and found that `N=1e6` will disconnect, while `N=999000` will NOT disconnect. * That seems to indicate that whatever bug it is, it is largely tied to some sort of 1MB quota. * When putting a breakpoint in the `onClose` handler in `./node_modules/engine.io-client/lib/transports/websocket.js`, you can debug the native WebSocket error event (which is in `arguments[0]`). * It's code is `1005`. * [According to MDN](https://developer.mozilla.org/en-US/docs/Web/API/CloseEvent), code 1005 - "Indicates that no status code was provided even though one was expected."

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[uibuilderfe:socket-disconnect] Reason: transport close when receiving json from node-red

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