socket.io | Realtime application framework | Runtime Evironment library
kandi X-RAY | socket.io Summary
kandi X-RAY | socket.io Summary
Realtime application framework (Node.JS server)
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Top functions reviewed by kandi - BETA
- Creates iterator for iterable
- Initialize a new server .
- Initialize the server .
- convert URI to URI
- Function to register a new service and register it on the SWF page .
- Wrap the super class function .
- Registers the service worker .
- Recursively decstruct data structures .
- Checks if a binary object is binary .
- Look for a URI .
socket.io Key Features
socket.io Examples and Code Snippets
Lines of Code : 359License : Non-SPDX (NOASSERTION)
CopyLines of Code : 113
License : No LicenseCopy
{{messageFunc(item)}}
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const express = require('express')
const socket = require('socket.io')
const http = require('http')
const fs = requir // default shown for each property
{
static: './public', // where to host static resources from
anonymous: [], // add paths or url patterns that bypass authentication and authorization,
port: 8800, // host port
urlPrefix: undefined, // a app.post('/something', (req, res) => {
req.app.io.emit('something', doSomethingWith(req.body))
res.status(200)
});
socket = io(`http://localhost:${port}`, { transports: ['websocket'] })
socket.on('somethingconst socketCookieName = "socketUser";
const cookieParser = require('socket.io-cookie-parser');
io.use(cookieParser());
io.on('connection', function(socket) {
// all parsed cookies in socket.request.cookies
let user = socket.http://localhost:3000 # port can change, check your node.js config
http://:3000 # you can check it in the preferences or terminal -> ipconfig
http://10.0.2.2:3000
http://localhost:3000 # port can change, check y// Socket.IO Cheatsheet
// Add socket to room
socket.join('some room');
// Remove socket from room
socket.leave('some room');
// Send to current client
socket.emit('message', 'this is a test');
// Send to all clients include sender
io.// this should be AFTER socket.io server setup
app.use((req, res) => {
res.send('Hello world');
});
http.listen(3000, function() {
console.log('listening on *:3000');
});
//Server-side
//Assume tweetDB is the DB
//Assume you have socket.io setup
//MongoDB Change Stream
const changeStream = tweetDB.watch();
changeStream.on('change', (changes) => {
//Add a event emitter
socket.compress(tr// Node modules imports
require('dotenv').config({ path: './variables.env' })
const express = require('express')
const socketio = require('socket.io')
const { ApolloServer, gql } = require('apollo-server-express')
// Initalizes the app seCommunity Discussions
Trending Discussions on socket.io
QUESTION
I am facing an issue connecting my socket io flutter client to my nodejs socket io server. I am aware of the compatibility issue between the node socket io package and the flutter socket io client package. Hence, I installed only compatible versions of dependencies on both ends.
i.e., for flutter
...ANSWER
Answered 2022-Apr-01 at 22:50As per the socket_io client readme
In Flutter env. not (Flutter Web env.) it only works with dart:io websocket, not with dart:html websocket or Ajax (XHR), so in this case you have to add setTransports(['websocket']) when creates the socket instance.
Try adding an options Map when you initialize your socket.
This is just a different way of doing the same thing from the example in pub.dev.
QUESTION
I have a login route that eventually create a jwt cookie named access_token. After the login the client will receive this cookie and will send it on every request. However I didn’t found a way to pass this cookie on to Socket.io.
Server side login route :
...ANSWER
Answered 2022-Mar-25 at 16:37Assuming that you have only one cookie which is your jwt, you could get it with the socket param like so :
QUESTION
I have created a custom async emitter to have a server -> client -> server method.
However, it doesn't work as expected. It emits the event, but does not run the callback.
With Socket.IO debugging enabled, I can see that the socket.io:socket is logging that it is emitting the correct event.
Function code:
...ANSWER
Answered 2022-Mar-21 at 15:06Callbacks with Socket.io are different and are generally referred to as acknowledgement functions
In order to implement callbacks, the sender would need to add the function to the last parameter of the socket.emit() call.
Example:
Sender
QUESTION
I have an NPM package I am working on which has a dependency of react. I then have a test app which has react installed as a dependency. When I import my npm package into the test app, I get the following error:
Invalid hook call. Hooks can only be called inside of the body of a function component. This could happen for one of the following reasons:
- You might have mismatching versions of React and the renderer (such as React DOM)
- You might be breaking the Rules of Hooks
- You might have more than one copy of React in the same app
Running npm ls react in my test app suggests I might have a duplicate of react:
ANSWER
Answered 2022-Mar-10 at 15:14It was not clear from the question description, but looking at the repo, I see that the package is installed locally.
QUESTION
Is there any trick to get a unique user identifier, which doesn't change, when the user refreshes the browser? I've tried socket.io and sessionID from express, but those change when the user refreshes the browser.
Why? I'm trying to make a game without the need to log in. The User class will create a lobby with friends and then start the game, which will be locked for any other users, but I want to make the feature, that if the user who has already started/joined any game will refresh the browser, he will be reconnected to his game.
I'd already set up the database which is ready for the unique user identifier, so the lobby/game will know who will be authorized to join and who will be not.
Code of how my sessions are set up:
...ANSWER
Answered 2022-Mar-01 at 16:01I found out why my sessionID was changing upon every request. It was because I wasn't saving anything in the session (because I was just printing the sessionID, wondering if it will change), so the session was dropped and on new request the new session was created etc. I should have read more documentation on express sessions.
Anyway, if anyone was wondering how to save something in the session, here is an simple example which counts how many times you visited the website.
QUESTION
Setup:
- Socket.io in React with react-router-dom
- Socket instance passed to child components via useContext
- Backend built using Express
Problem:
Navbar listens for socket events to update counters for unread messages. Everything works fine until user navigates to a different page. Once a navigation occurs, the socket in navbar (which never unmounts) is unresponsive to future events being emitted from the server even though the connection is intact.
Expected behaviour:
Navbar socket remains responsive to emits from server after page navigation.
Observation:
Other areas of the app where socket is utilized remains functional even while navbar socket is unresponsive. The navbar socket becomes responsive again when page is refreshed but the same problem repeats after page navigation. The navbar is the only component that doesn't unmount when a navigation occurs while components mounted on navigation is loaded with the socket instance via useContext.
As far as I can see, connection is never broken (disconnect event never fires on server-side) and the newly mounted component can emit an event, server responds, and emits a response back to client where the new component responds while the navbar doesn't.
Other notes:
This is the first question I've ever asked so my apologies in advance if the question is poorly formatted. The code is obviously simplified to leave out areas where it seems to not affect the problem. The server-side code is omitted because it seems to receive and emit events without any problems.
ANSWER
Answered 2022-Feb-23 at 15:35Since your socket wants to live from first page load until you close the page (I assume so..) I suggest to decouple socket initialisation from React. It just doesn't seem right to put it in a ref because even the app component has still a chance to unmount and mount again (as you experienced on page load) or to do other sideeffects to it.
For example have a file socket.js
QUESTION
I fail to enable the CORS for testing with the latest NestJS 8.0.6 and a fresh http + ws project. That said, I want to see the Access-Control-Allow-Origin in the servers response (so that the client would accept it). Here is my main.ts where I've tried 3 approches: 1) with options, 2) with a method, 3) with app.use. None of them works.
ANSWER
Answered 2021-Sep-20 at 20:29The enableCors and { cors: true } options are for the HTTP server (express or fastify). The URL given showing the CORS error came from a socket.io connection. To enable CORS for socket.io you need to use the options in the @WebsocketGateway() decorator, like
QUESTION
I'm a JS, phaser3 and Socket.io newbie and I really want to learn.
Code Context:
- Phaser3
- Socket.io
- Loading state of game room before socket connects
- Generating the NPC's and players
- fails when there's an attempt to access NPC's (mass) sprite in the same callback it was created
Issue:
- Cannot access the sprite property, and in general seems like the object wasn't created in the first place
I have the socket listening in Phaser3's "create()" function for "universeState" after it has connected to the socket server. index.js:
...ANSWER
Answered 2022-Jan-22 at 18:04The reason why you cant access the property is "easy", it's because the this.state.state.mass object is empty.
since te output:
QUESTION
I have upgraded my angular to angular 13. when I run to build SSR it gives me following error.
...ANSWER
Answered 2022-Jan-22 at 05:29I just solve this issue by correcting the RxJS version to 7.4.0. I hope this can solve others issue as well.
QUESTION
I am working on a chat application using React and socket.io. Back end is express/node. The relevant components are: Room.js --> Chat.js --> Messages.js --> Message.js
messageData received from the server is stored in state in Room.js. It is then passed down through Chat.js to Messages.js, where it is mapped onto a series of Message.js components.
When messages are received, they ARE appearing, but only after I start typing in the form again, triggering messageChangeHandler(). Any ideas why the Messages won't re-render when a new message is received and added to state in Room.js? I have confirmed that the state and props are updating everywhere they should be--they just aren't appearing/re-rendering until messageChangeHandler() triggers its own re-render.
Here are the components.
Room.js
...ANSWER
Answered 2022-Jan-11 at 19:44Changing the useEffect in room to contain the following fixed the issue:
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