Socket.IO

问题 I try to connect from angular to a Express.io socket, but I have error 404 CORS. How can I solve this? XMLHttpRequest cannot load http://localhost:3000/socket.io/?EIO=3&transport=polling&t=1447367208172-29. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost' is therefore not allowed access. If I load this route directly from browser directly, it works well But from localhost:80 angular to localhot:3000 express.io not works. In my express.io

问题 I try to connect from angular to a Express.io socket, but I have error 404 CORS. How can I solve this? XMLHttpRequest cannot load http://localhost:3000/socket.io/?EIO=3&transport=polling&t=1447367208172-29. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost' is therefore not allowed access. If I load this route directly from browser directly, it works well But from localhost:80 angular to localhot:3000 express.io not works. In my express.io

问题 i am trying to pass my newsocket variable from my MessagesScreen.js to my ChatScreen.js. I have been stuck on this point for a while and would appreciate any help possible. What i am trying to achieve is that only one connection gets emitted which i can listen to events on both screen. The connection is now opened on the messagesScreen. My problem now is if user 1 is on the allmessages screen and user 2 is inside the chat. And user 2 sends user 1 a message, user 1's screen does not

问题 i currently have 2 screens an all messages screen which includes all the chats i participated in and a chat screen which is the actual chat itself. In my chat screen i successfully implemented sockets, so when both users are on the chat screen at the same time messages are getting exchanged live. My problem: Example: if user 1 is on the allmessages screen and user 2 is inside the chat. And user 2 sends user 1 a message, user 1's screen does not automatically update with the last message for

问题 i currently have 2 screens an all messages screen which includes all the chats i participated in and a chat screen which is the actual chat itself. In my chat screen i successfully implemented sockets, so when both users are on the chat screen at the same time messages are getting exchanged live. My problem: Example: if user 1 is on the allmessages screen and user 2 is inside the chat. And user 2 sends user 1 a message, user 1's screen does not automatically update with the last message for

问题 What is the difference between: socket.broadcast.to().emit() and socket.to().emit() Here on the socket.io cheat sheet it says socket.to('game').emit('nice game', "let's play a game"); // sending to all clients in 'game' room except sender Then in this tutorial blog it says: socket.broadcast.to('game').emit('message', 'nice game'); //sending to all clients in 'game' room(channel) except sender socket.to('game').emit('message', 'enjoy the game'); //sending to sender client, only if they are in

问题 I have windows 10 machine and when I try to run my script it's throw error Cannot find module 'socket.io' server.listen(8089); // use socket.io var io = require('socket.io').listen(server); 回答1: You'll want to use npm install (from your command prompt) to ensure the socket.io package is installed before use. npm install --save socket.io The --save flag will add the given dependency to your application's package.json for easier installation in the future 来源： https://stackoverflow.com/questions

问题 I'm building a PWA that on Android uses Push Notifications to receive alerts. Of course, Safari/iOS doesn't support Push Notifications, so I need to implement an equivalent. Can I have my Service Worker poll for data, either using http long timeouts or socket.io? On receiving an alert, the SW will focus/create an app window to then deal with the UX. If there is a list of cans & can'ts or dos * don'ts for service workers, that would be great. 回答1: No, that is not possible. You cannot keep the

问题 I've searched couple of days for it but found nothing to fix this issue. My client is an iOS device running socket.io v15.2.0 (Oct 17, 2019). I've followed this post (Implement a WebSocket Using Flask and Socket-IO(Python)) That post described how to connect to the python socket server with a javascript client but even the javascript client has also returned same error :| Then I checked the compatibility table at this page and found out that the latest version only works with the javascript

问题 I'm not a frontend developer but I know JavaScript well enough for this problem. However, I started working with Ionic lately in combination with the React framework. I'm a beginner with Ionic/React and learning it was fun until I faced this issue. The app I'm developing is simple. I'm receiving values in (near) real time over websockets from the server and I want to show them in the UI. For this, I have ItemSliding or SlidingComponents in the UI, where I can swipe right in order to subscribe