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October 6, 2016 21:36
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset="utf-8"> | |
<title>Websocket tutorial</title> | |
<script src="http://localhost:3000/socket.io/socket.io.js"></script> | |
</head> | |
<body> | |
<h1> | |
Ultimate Web Chat 0.1.0 | |
</h1> | |
<input id="name" type="text" placeholder="name"> | |
<input id="password" type="password" placeholder="password"> | |
<button id="login-button" name="button" onclick="login()">Login</button> | |
<button id="signup-button" name="button" onclick="signup()">Signup</button> | |
<div id='motd'></div> | |
<p id='messages'> | |
</p> | |
<input id="new-message" type="text" placeholder="New Message"> | |
<button name="button" onclick="sendMessage()">Send</button> | |
<script> | |
const sioServerURL = 'http://localhost:3000'; | |
// pegar o conteúdo dos inputs | |
function getNamePassword() { | |
const name = document.getElementById('name').value; | |
const password = document.getElementById('password').value; | |
return { | |
name, | |
password | |
} | |
} | |
const headers = new Headers(); | |
headers.set('Content-Type', 'application/json'); | |
// fazer o signup | |
function signup() { | |
return fetch(`${sioServerURL}/signup`, { | |
headers, | |
method: 'post', | |
body: JSON.stringify(getNamePassword()), | |
}) | |
.then(x => x.json()) | |
.then(token => loginWS(token)); | |
} | |
// fazer o login | |
function login() { | |
var data = new FormData(); | |
data.append('json', JSON.stringify(getNamePassword())); | |
console.log(data); | |
return fetch(`${sioServerURL}/login`, { | |
headers, | |
method: 'post', | |
body: JSON.stringify(getNamePassword()), | |
}) | |
.then(x => x.json()) | |
.then(token => loginWS(token)); | |
} | |
// função que é chamada para enviarmos a mensagem | |
// hack simples para podermos ter acesso dentro do escopo global a uma função que vai ser definida dentro do outro escopo, mas evite utilizar esse tipo de 'recurso' | |
let sendMessage; | |
// irá realizar o login | |
function loginWS(token) { | |
const sioOptions = { | |
'query': 'token=' + token | |
}; | |
const socket = io(sioServerURL, sioOptions); | |
const messages = document.getElementById('messages'); | |
const motd = document.getElementById('motd'); | |
socket.on('connect', () => { | |
socket.on('error', (data) => { | |
if (data.type === 'UnauthorizedError') { | |
motd.textContent = 'Suas credenciais estão inválidas!' | |
} | |
}); | |
function addMessage({ | |
userName, | |
message | |
}) { | |
const newDiv = document.createElement('div'); | |
const newContent = document.createTextNode(`${userName}: ${message}`); // atualizada para novo modelo de mensagem | |
newDiv.appendChild(newContent); | |
messages.appendChild(newDiv); | |
} | |
function emitMessage() { | |
console.log('emit'); | |
const newMessage = document.getElementById('new-message').value; | |
socket.emit('sent message', newMessage); | |
document.getElementById('new-message').value = ""; | |
} | |
sendMessage = emitMessage; // hack | |
socket.on('hello', (data) => { | |
document.getElementById('motd').textContent = data; | |
}) | |
socket.on('messages', (data) => { | |
data.forEach(m => addMessage(m)); | |
}) | |
socket.on('new message', (data) => { | |
console.log('new message'); | |
addMessage(data); | |
}) | |
}) | |
} | |
</script> | |
</body> | |
</html> |
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