0
我目前正在使用socket.io-client/socket.io登錄系統,問題是當我啓動服務器時,執行查詢,檢索數據庫中的當前數據,如果用戶註冊他們無法登錄,直到重新啓動服務器,如果我使用:從Mysql查詢更新檢索到的數據? Node.js node-mysql
SELECT * FROM mytable ORDER BY id DESC LIMIT 1
則只有剛剛註冊可以登錄,而不是已註冊用戶的用戶,我怎麼能解決這個問題?
我有它,所以當用戶名和密碼從客戶端提交到服務器時,包含Mysql代碼的函數被執行,邏輯上我認爲這會再次運行查詢爲每個新的連接,但它不。
我的代碼:
服務器:
console.log("Berdio - A Awesome socket server for everyone!")
console.log("Created with Love, by OzzieDev! Enjoy the awesomeness!")
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
function dosql(){
var mysql = require('mysql')
var connection = mysql.createConnection({
host : 'localhost',
user : 'root',
password : 'root',
database : 'Berd'
})
connection.query('SELECT * FROM Berd_Data', function(err, rows, fields, result){
if (err) throw err;
var usrname = rows[0].Username
var psword = rows[0].Password
global.usrname = usrname
global.psword = psword
});
}
io.on('connection', function(socket){
})
socket.on('user-name', function(data){
dosql()
socket.broadcast.emit('user-connected',data.u);
console.log(u,p)
var u = data.u
var p = data.p
console.log(u,p + " " + "emitted Data");
if (u === global.usrname && p === global.psword){
socket.emit('AuthGood')
}else{
socket.emit('AuthFail')
}
socket.on('msg',function(data){
var message = data.message
if (typeof message !== "undefined"){
socket.broadcast('newmsg',msg)
}
if(message === "quit"){
process.exit();
}
})
});
});
http.listen(3000, function(){
console.log('listening on *:3000');
});
客戶:
var socket = require('socket.io-client')('http://127.0.0.1:3000');
socket.on('connect_error', function(){
console.log('Failed to establish a connection to the servers, or lost connection');
return process.exit();
});
var prompt = require("prompt-sync")()
console.log("Your Ip has been logged, but encrypted. Please see website for more info")
var news = "Add news: Will be from database. "
var username = prompt("Username>: ")
var password = prompt("Password>: ")
if (typeof username, password !== "undefined"){
socket.emit('request')
socket.emit('user-name', { u: username, p: password });
}
socket.on('AuthGood',function(socket){
console.log("Your details have been authenticated, hello again!")
var message = prompt("message>: ")
})
socket.on('AuthFail',function(socket){
console.log("Your details failed to authenticate, Wrong Pass/Username combination, quitting!")
return process.exit();
})
if (typeof message !== "undefined"){
socket.emit('msg',{m: message})
}
socket.on('user-connected',function(data){
var userconn = data.username
console.log(username +" " +"Has joined us!")
})
socket.on('newmsg',function(data){
var newmsg = data.msg
console.log("-----------------------------------")
console.log(username+">:" + " " +msg)
})
你的問題很不清楚。爲什麼在服務器啓動時查詢?發佈一些代碼示例。您可能會遭受糟糕的代碼設計,我們需要審查。 – vladaman
會做,對不起。 – FlerrElectronics
更確切地說,看起來只有第一行,在這種情況下是:Ozzie和密碼,數據庫中的任何事項之後的任何內容都不會被檢索。我很可能使用錯誤的查詢。 – FlerrElectronics