laravel 整合 workerman 做聊天室

在很多时候我们需要做这种聊天室的时候需要实时响应，所以今天介绍一下workerman，如果没有听过workerman的小伙伴，传送门：[workerman文档](http://doc.workerman.net/ "workerman文档") ，[官网](https://www.workerman.net/ "官网")

本篇文章是整合`laravel 5.8`的，使用`artisan` 命令去管理`workerman`。

如果觉得`workerman`不好搞，也可以直接使用`GatewayWorker`，传送门：[GatewayWorker手册](http://doc2.workerman.net/ "GatewayWorker手册") ， [在 Laravel 中使用 GatewayWorker 进行 socket 通讯](https://learnku.com/articles/13151/using-laravel-to-carry-out-socket-communication-in-workerman "在 Laravel 中使用 GatewayWorker 进行 socket 通讯")

#### 第一步 安装workerman

在项目根目录执行

composer require workerman/workerman

#### 第二部 创建命令类，自定义启停workerman

在项目根目录执行

php artisan make:command Workerman

执行该命令会在`app/Console/Commands/`下面创建`Workerman.php`文件，该文件代码如下：

```php
<?php

namespace App\Console\Commands;

use Illuminate\Console\Command;
use Workerman\Autoloader;
use Workerman\Worker;

class Workerman extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'Workerman {action} {--daemonize}';

/**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'workerman 启动停止';

/**
     * Create a new command instance.
     *
     * @return void
     */
    public function __construct()
    {
        parent::__construct();
    }

/**
     * Execute the console command.
     *
     * @return mixed
     */
    public function handle()
    {
        global $argv;//定义全局变量
        $arg = $this->argument('action');
        $argv[1] = $arg;
        $argv[2] = $this->option('daemonize') ? '-d' : '';//该参数是以daemon（守护进程）方式启动

global $text_worker;
        // 创建一个Worker监听2345端口，使用websocket协议通讯
        $text_worker = new Worker("websocket://0.0.0.0:2345");
        $text_worker->uidConnections = array();//在线用户连接对象
        $text_worker->uidInfo = array();//在线用户的用户信息
        // 启动4个进程对外提供服务
        $text_worker->count = 4;
		//引用类文件
        $handler = \App::make('Handler\WorkermanHandler');
        $text_worker->onConnect = array($handler,"handle_connection");
        $text_worker->onMessage = array($handler,"handle_message");
        $text_worker->onClose = array($handler,"handle_close");
        $text_worker->onWorkerStart = array($handler,"handle_start");

// 运行worker
        Worker::runAll();

}
}

```
    注意：action 是启动参数，daemonize选项是是否后台运行，如果不需要后台运行请把有关daemonize的代码删掉。
    最最重要的地方来了$argv一定不能删掉，否则启动workerman的时候会报错

然后手动创建`app/Handler/WorkermanHandler.php`文件，代码如下：

```php
<?php
namespace Handler;

use Illuminate\Console\Command;
use Workerman\Lib\Timer;
use Workerman\Worker;

class WorkermanHandler
{

private $heartbeat_time = 55;//心跳间隔55秒

//当客户端连上来时分配uid,并保存链接,并通知所有客户端
    public function handle_connection($connection){
        global $text_worker;

//判断是否设置了UID
        if(!isset($connection->uid)){
            //给用户分配一个UID
            $connection->uid = random_string(20);
            //保存用户的uid
            $text_worker->uidConnections["{$connection->uid}"] = $connection;
            //向用户返回创建成功的信息
            $connection->send("用户:[{$connection->uid}] 创建成功");
        }
    }

public function handle_start(){
        global $text_worker;
        //每秒都判断客户端是否已下线
        Timer::add(1, function()use($text_worker){
            $time_now = time();
            foreach($text_worker->connections as $connection) {
                // 有可能该connection还没收到过消息，则lastMessageTime设置为当前时间
                if (empty($connection->lastMessageTime)) {
                    $connection->lastMessageTime = $time_now;
                    continue;
                }
                // 上次通讯时间间隔大于心跳间隔，则认为客户端已经下线，关闭连接
                if ($time_now - $connection->lastMessageTime > $this->heartbeat_time) {
                    $connection->close();
                }
            }
        });
        //每隔30秒就向客户端发送一条心跳验证
        Timer::add(50,function ()use ($text_worker){
            foreach ($text_worker->connections as $conn){
                $conn->send('{"type":"ping"}');
            }
        });
    }

//当客户端发送消息过来时,转发给所有人
    public function handle_message($connection,$data){
        global $text_worker;
        //debug
        //echo "data_info:".$data.PHP_EOL;
        $connection->lastMessageTime = time();
        $data_info=json_decode($data,true);
        if(!$data_info){
            return ;
        }
        //判断业务类型
        switch($data_info['type'])
        {
            case 'login':
                //判断用户信息是否存在
                if(empty($data_info['user_id'])){
                    $connection->send("{'type':'error','msg':'非法请求'}");
                    return $connection->close();
                }
                //判断用户是否已经登录了
                $user_ids=array_column($text_worker->uidInfo,"user_id");
                if(in_array($data_info['user_id'],$user_ids)){
                    $connection->send("{'type':'error','msg':'你在其它地方已登录'}");
                    return $connection->close();
                }
                //存储用户信息
                $text_worker->uidInfo["{$connection->uid}"]=array(
                    "user_id"=>$data_info['user_id'],
                    "user_name"=>htmlspecialchars($data_info['user_name']),
                    "user_header"=>$data_info['user_header'],
                    "create_time"=>date("Y-m-d H:i"),
                );
                //返回数据
                if($data_info['to_uid'] == "all"){
                    $return_data=array(
                        "type"=>"login",
                        "uid"=>$connection->uid,
                        "user_name"=>htmlspecialchars($data_info['user_name']),
                        "user_header"=>$data_info['user_header'],
                        "send_time"=>date("Y-m-d H:i",time()),
                        "user_lists"=>$text_worker->uidInfo
                    );
                    $curral_data=array(
                        "type"=>"login_uid",
                        "uid"=>$connection->uid,
                    );
                    $connection->send(json_encode($curral_data));
                    //给所有用户发送一条数据
                    foreach($text_worker->connections as $conn){
                        $conn->send(json_encode($return_data));
                    }
                }else{
                    return ;
                }
                return;
            //用户发消息
            case 'say':
                if(!isset($text_worker->uidInfo["{$connection->uid}"]) || empty($text_worker->uidInfo["{$connection->uid}"])){
                    $connection->send('{"type":"error","msg":"你已经掉线了"}');
                }
                //获取到当前用户的信息
                $user_info=$text_worker->uidInfo["{$connection->uid}"];

//判断是私聊还是群聊
                if($data_info['to_uid'] != "all"){
                    //私聊
                    $return_data=array(
                        "type"=>"say",
                        "from_uid"=>$connection->uid,
                        "from_user_name"=>$user_info['user_name'],
                        "from_user_header"=>$user_info['user_header'],
                        "to_uid"=>$data_info['to_uid'],
                        "content"=>nl2br(htmlspecialchars($data_info['content'])),
                        "send_time"=>date("Y-m-d H:i")
                    );
                    if($data_info['to_uid'] == $connection->uid){
                        $connection->send(json_encode($return_data));
                        return;
                    }
                    //判断用户是否存在，并向对方发送数据
                    if(isset($text_worker->uidConnections["{$data_info['to_uid']}"])){
                        $to_connection=$text_worker->uidConnections["{$data_info['to_uid']}"];
                        $to_connection->send(json_encode($return_data));
                    }
                    //向你自己发送一条数据
                    $connection->send(json_encode($return_data));
                }else{
                    //群聊
                    $return_data=array(
                        "type"=>"say",
                        "from_uid"=>$connection->uid,
                        "from_user_name"=>$user_info['user_name'],
                        "from_user_header"=>$user_info['user_header'],
                        "to_uid"=>"all",
                        "content"=>nl2br(htmlspecialchars($data_info['content'])),
                        "send_time"=>date("Y-m-d H:i")
                    );
                    //向所有用户发送数据
                    foreach($text_worker->connections as $conn){
                        $conn->send(json_encode($return_data));
                    }
                }
                return;
            case "pong":
                return;
        }
    }

//当客户端断开时,广播给所有客户端
    public function handle_close($connection){
        global $text_worker;
        $user_name=$text_worker->uidInfo[$connection->uid]['user_name'] ?? "";
        unset($text_worker->uidConnections["{$connection->uid}"]);
        unset($text_worker->uidInfo["{$connection->uid}"]);
        if(!empty($user_name)){
            $return_data=array(
                "type"=>"logout",
                "uid"=>$connection->uid,
                "user_name"=>$user_name,
                "create_time"=>date("Y-m-d H:i:s"),
            );
            foreach($text_worker->connections as $conn){
                $conn->send(json_encode($return_data));
            }
        }

}

}
```

该代码是我这边自己的代码，有些东西没有贴出来，只做参考，比如怎么实现维持心跳和分配用户唯一id等。

打开`composer.json`文件增加一段`"app/Handler"`于classmap中，下面是我的部分内容：

...
        "autoload": {
            "classmap": [
                "database/seeds",
                "database/factories",
                "app/Handler" 
            ],
            "psr-4": {
                "App\\": "app/"
            }
        },
    ...

执行命令: `composer dump-autoload`

执行命令启动`workerman`

`php artisan Workerman start --daemonize`

再说一遍：app\Console\Commands\Workerman.php 里的代码 $arg = $this->argument('action'); $argv [1] = $arg; 如果这段代码不写那么就无法启动服务会报Usage: php yourfile.php {start|stop|restart|reload|status|connections} [-d]
    
    原因: 参考接收位置错误. 代码位置: \vendor\workerman\workerman\Worker.php 673 684, 问题位置 673行中, $argv 这个全局变量取的key的位置错乱的.

如果你是debug模式启动workerman的话，就把app\Console\Commands\Workerman.php 里的 关于daemonize的代码删掉，启动命令就是`php artisan Workerman start`

#### 参考资料

[laravel使用Workerman搭建简易聊天室](https://www.jianshu.com/p/4ef8dcffdbe7 "laravel使用Workerman搭建简易聊天室")
[laravel-workerman简易聊天室](http://www.majianwei.com/archives/6907 "laravel-workerman简易聊天室")

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