今天测试swoole写webserver实现多端口监听。记录下爬过的坑：关于tcp协议监听触发不到receive！！！！！

　　首先上服务端代码

class Http{    /**     * 服务实例     * @var Server     */    protected $server;    public function run(){        $setting = Config::get('http');        /*开启监听*/        $this->server = new Server($setting['host'],$setting['port']);        if (isset($setting['config']) && $setting['config'])$this->server->set($setting['config']);        if (isset($setting['tcp_check']) && $setting['tcp_check']){            /*开启多端口监听*/            $port = $this->server->addListener('127.0.0.1','9501',SWOOLE_SOCK_TCP);            $port->on('connect',[$this,'connect']);            $port->on('receive',[$this,'receive']);        }        $this->server->on('start',[$this,'start']);        $this->server->on('request',[$this,'request']);        $this->server->on('workerStart',[$this,'workerStart']);        $this->server->start();    }    /**     * 主进程启动     * @param Server $server     */    public function start(Server $server){        $reload = Reload::getInstance(Config::get('reload_watch'));        /*启动定时热重启检测*/        swoole_timer_tick(6000,function ()use ($reload){            if ($reload->reload()) $this->server->reload();        });    }    /**     *     * @param Request $request     * @param Response $response     */    public function request(Request $request,Response $response){        $route = Route::get_instance();        $route->dispatch($request,$response);    }    public function workerStart(Server $server, int $worker_id){        /*可热重启配置*/        Config::loadLazy();        /*加载路由*/        include_once APP_PATH.'/route.php';    }    public function connect(Server $server,int $fd, int $reactorId){        var_dump('connection');    }    public function receive(Server $server, int $fd, int $reactor_id, string $data){        var_dump('receive',$data);    }}

　　当我调用本地tcp client向服务发送tcp请求并发送数据的时候发现如下结果：

[root@bin]# php walter.php string(10) "connection"

　　发现没，tcp监听服务只触发了connect回调，receive回调竟然没有触发成功。经过不断调试后来在官网看到如下一段话得到了启发。

 

　　官网说增加监听端口需要单独调用set函数来为addListener返回的swoole_server_port对象设置监听配置注意，只对1.8.0以上版本有效

 

 　　后来在开启多端口监听中加入了$port->set([]);这一行后发现监听服务可以顺利监听到并且成功触发了recrive

public function run(){        $setting = Config::get('http');        /*开启监听*/        $this->server = new Server($setting['host'],$setting['port']);        if (isset($setting['config']) && $setting['config'])$this->server->set($setting['config']);        if (isset($setting['tcp_check']) && $setting['tcp_check']){            /*开启多端口监听*/            $port = $this->server->addListener('127.0.0.1','9501',SWOOLE_SOCK_TCP);            $port->set([]);            $port->on('connect',[$this,'connect']);            $port->on('receive',[$this,'receive']);        }        $this->server->on('start',[$this,'start']);        $this->server->on('request',[$this,'request']);        $this->server->on('workerStart',[$this,'workerStart']);        $this->server->start();    }

　　收到结果如下：

[root@bin]# php walter.php string(10) "connection"string(7) "receive"string(11) "hello world"

　　虽然不知道这个是不是swoole目前的bug，官网上暂时没看到类似的问题跟文档说明。但是这个是实实在在需要注意的。每一个server都必须调用set函数设置需要的配置，哪怕你什么都不想要设置都要给个空数组进去以防万一。

　　另外还有一个需要注意的当监听多端口的时候swoole_server_port->set()设置worker_num数量的时候这里的worker进程不会另外创建，应该是从主进程创建的worker中创建的worker中分配相应数量的进程给swoole_server_port的。所以这里设置的数量比主进程设置的多是没有用的。主进程设置生成的worker数量是多少就多少。以上只是个人猜测，至于swoole底层如何处理这个swoole_server_port设置的worker_num配置不得而知，还没真正看过底层的实现代码。也有人的说法是swoole_server_port设置worker_num是不生效的。哪种说法正确只有以后有机会看看底层源码来判断了。或许这个也是当前版本的bug也说不定。

　　当前测试的swoole版本为4.2.8