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[英]Socket.io with ack between iOS device and Node.js server not working
[英]Unable to establish connection between Node.JS and React-Native (Socket.IO)
我是React
和Node
的新手,我正在嘗試使用Socket.IO制作一個簡單的WebSocket
,它會簡單地向所有連接的用戶發送問候,用戶將響應服務器。
Node.JS
服務器在 Windows PC 上運行,而 React-Native 應用程序在 iOS 和 ZE84E30B9390CDB46ABZDB6DB8 設備上運行。
Node.JS
服務器代碼如下
var app = require('express')();
var http = require('http').createServer(app);
var io = require('socket.io')(http);
const bodyParser = require('body-parser');
const mysql = require('mysql');
const connection = mysql.createPool({
host : 'localhost',
user : 'root',
password : 'block',
database : 'visualpos'
});
// Creating a GET route that returns data from the 'users' table.
app.get('/prenotazioni', function (req, res) {
// Connecting to the database.
connection.getConnection(function (err, connection) {
// Executing the MySQL query (select all data from the 'users' table).
connection.query("SELECT Data, Importo_Doc FROM tabella_pagamenti", function (error, results, fields) {
// If some error occurs, we throw an error.
if (error) throw error;
// Getting the 'response' from the database and sending it to our route. This is were the data is.
res.send(results)
});
connection.release();
});
});
app.get('/', function(req, res){
res.send('<h1>Hello World</h1>');
});
// Starting our server.
http.listen(3000, () => {
console.log('In ascolto sulla porta *:3000');
});
io.emit('saluta', 'Ciao dal server :)');
io.on('connected', (data) => {
console.log(data);
});
實際上 GET 部分代碼運行良好,但 Socket.IO 似乎已經死亡。 客戶端沒有得到任何響應和服務器相同我認為 Socket.IO 服務器根本沒有啟動..
在 XCode 調試中,當應用程序在 iPhone 上運行時出現以下錯誤
我什至在兩台設備上都發出警告“無法識別 WebSocket 連接選項‘代理’,‘perMessageDeflate’,...”
這是我在 React-Native 中使用的代碼
import io from 'socket.io-client'
var socket = io('http://192.168.100.50:3000', {
jsonp: false,
transports: ['websocket'],
autoConnect: true,
reconnection: true,
reconnectionDelay: 500,
reconnectionAttempts: Infinity
});
componentDidMount(){
socket.emit('connected','we');
socket.on('saluta',(data) => { alert(data); });
}
在 socket.io getStarted 部分,他們使用“連接”事件而不是“連接”( https://socket.io/get-started/chat/ )。
io.on('connection', function(socket){ console.log('a user connected'); socket.on('disconnect', function(){ console.log('user disconnected'); }); });
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