AsyncTcpConnection类 - connect

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2023-12-01

void AsyncTcpConnection::connect()

执行异步连接操作。此方法会立刻返回。

注意：如果需要设置异步连接的onError回调，则应该在connect执行之前设置，否则onError回调可能无法被触发，例如下面的例子onError回调可能无法触发，无法捕获异步连接失败事件。

$connection = new AsyncTcpConnection('tcp://baidu.com:81');
// 执行连接的时候还没设置onError回调
$connection->connect();
$connection->onError = function($connection, $err_code, $err_msg)
{
    echo "$err_code, $err_msg";
};

参数

无参数

返回值

无返回值

示例 Mysql代理

use WorkermanWorker;
use WorkermanConnectionAsyncTcpConnection;
require_once __DIR__ . '/Workerman/Autoloader.php';
// 真实的mysql地址，假设这里是本机3306端口
$REAL_MYSQL_ADDRESS = 'tcp://127.0.0.1:3306';
// 代理监听本地4406端口
$proxy = new Worker('tcp://0.0.0.0:4406');
$proxy->onConnect = function($connection)
{
    global $REAL_MYSQL_ADDRESS;
    // 异步建立一个到实际mysql服务器的连接
    $connection_to_mysql = new AsyncTcpConnection($REAL_MYSQL_ADDRESS);
    // mysql连接发来数据时，转发给对应客户端的连接
    $connection_to_mysql->onMessage = function($connection_to_mysql, $buffer)use($connection)
    {
        $connection->send($buffer);
    };
    // mysql连接关闭时，关闭对应的代理到客户端的连接
    $connection_to_mysql->onClose = function($connection_to_mysql)use($connection)
    {
        $connection->close();
    };
    // mysql连接上发生错误时，关闭对应的代理到客户端的连接
    $connection_to_mysql->onError = function($connection_to_mysql)use($connection)
    {
        $connection->close();
    };
    // 执行异步连接
    $connection_to_mysql->connect();
    // 客户端发来数据时，转发给对应的mysql连接
    $connection->onMessage = function($connection, $buffer)use($connection_to_mysql)
    {
        $connection_to_mysql->send($buffer);
    };
    // 客户端连接断开时，断开对应的mysql连接
    $connection->onClose = function($connection)use($connection_to_mysql)
    {
        $connection_to_mysql->close();
    };
    // 客户端连接发生错误时，断开对应的mysql连接
    $connection->onError = function($connection)use($connection_to_mysql)
    {
        $connection_to_mysql->close();
    };
};
// 运行worker
Worker::runAll();

测试

mysql -uroot -P4406 -h127.0.0.1 -p
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 25004
Server version: 5.5.31-1~dotdeb.0 (Debian)
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Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
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