PHP websocket断开连接问题
PHP websocket断开连接问题
提问于 2018-02-22 16:15:59
我已经测试了几个库(工人和PHP-Websockets)，但在所有情况下我都有相同的问题--当我打开客户端页面时，一切正常，我与服务器有websocket连接，但稍后它会在几分钟或更短的时间内自动断开连接。它是已知的问题，还是有任何方法来处理它？或者，如果websocket失败了，我应该简单地实现一些函数来强制恢复吗？
这是workerman的代码示例
服务器test_ws.php
<?php
require_once '/home/ubuntu/workspace/workerman/vendor/autoload.php';
use Workerman\Worker;
// Create a Websocket server
$ws_worker = new Worker("websocket://0.0.0.0:8082");
// 6 processes
$ws_worker->count = 6;
// Emitted when new connection come
$ws_worker->onConnect = function($connection)
{
echo "New connection\n";
$connection->send('Hello from server');
};
// Emitted when data received
$ws_worker->onMessage = function($connection, $data)
{
// Send hello $data
$connection->send('Data from server: ' . $data);
};
// Emitted when connection closed
$ws_worker->onClose = function($connection)
{
echo "Connection closed\n";
};
// Run worker
Worker::runAll();和客户端client.html
var socket = new WebSocket("wss://example.com:8082");
socket.onopen = function() {
console.log("Connected.");
};
socket.onclose = function(event) {
if (event.wasClean) {
console.log('Connection closed');
} else {
console.log('Connection failure');
}
console.log('Code: ' + event.code + ' Reason: ' + event.reason);
};
socket.onmessage = function(event) {
console.log("Data received: " + event.data);
};
socket.onerror = function(error) {
console.log("Error: " + error.message);
};
function send() {
socket.send("Hello!");
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Workerman Sockets Test</title>
</head>
<body>
<h3>Hello</h3>
<button onclick="send()">Send Message</button>
</body>
</html>
所以，首先我启动apache服务器，然后通过控制台运行我的websocket脚本，websocket服务器可以正常启动。然后我打开我的客户网页和websocket连接也建立了良好的，但如果我等待大约1分钟或更短的时间，它没有理由失败。如何建立永久的websocket连接？如有任何建议，将不胜感激。谢谢!
服务器
客户端
回答 1
Stack Overflow用户
回答已采纳
发布于 2018-02-24 04:52:04
正如这篇文章中所写的：“在建立了websocket连接的情况下，服务器或防火墙可以在一段时间不活动之后超时并终止连接。”
这就是解决办法！
修改后的客户页面：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Workerman Sockets Test</title>
</head>
<body>
<h3>Hello</h3>
<button onclick="send()">Send Message</button>
<script type="text/javascript">
var socket = new WebSocket("wss://example.com:8082");
var timerID = 0;
function keepAlive() {
var timeout = 20000;
if (socket.readyState == socket.OPEN) {
socket.send('');
}
timerId = setTimeout(keepAlive, timeout);
}
function cancelKeepAlive() {
if (timerId) {
clearTimeout(timerId);
}
}
socket.onopen = function() {
console.log("Connected.");
document.body.innerHTML += "<p>Connected.</p>";
keepAlive();
};
socket.onclose = function(event) {
if (event.wasClean) {
console.log('Connection closed');
document.body.innerHTML += "<p>Connection closed</p>";
} else {
console.log('Connection failure');
document.body.innerHTML += "<p>Connection failure</p>";
}
console.log('Code: ' + event.code + ' Reason: ' + event.reason);
document.body.innerHTML += "<p>Code: " + event.code + " Reason: " + event.reason + "</p>";
cancelKeepAlive();
};
socket.onmessage = function(event) {
console.log("Data received: " + event.data);
document.body.innerHTML += "<p>Data received: " + event.data + "</p>";
};
socket.onerror = function(error) {
console.log("Error: " + error.message);
document.body.innerHTML += "<p>Error: " + event.message + "</p>";
cancelKeepAlive();
};
function send() {
socket.send("Hello");
}
</script>
</body>
</html>希望它能对某人有所帮助。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/48932232
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