应用场景：实现简单的即时消息聊天室.
（Linux + centos + php + nginx + mysql + redis）环境
一、扩展安装
pecl install swoole
安装完成后可以通过以下命令检测Swoole是否安装成功
php -m
二、webSocket服务端代码
我们需要通过Laravel Command来实现,因为Swoole只能运行在PHP CLI模式下
1.生成Command类
php artisan make:command SwooleServer
2.编写webSocket Server逻辑
<?php
namespace App\Console\Commands;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\Redis;
use Illuminate\Support\Facades\Request;
class SwooleServer extends Command
{
/**
* The name and signature of the console command.
*
* @var string
*/
protected $signature = 'swoole:server';
/**
* The console command description.
*
* @var string
*/
protected $description = 'swoole send msg';
/**
* Create a new command instance.
*
* @return void
*/
public function __construct()
{
parent::__construct();
}
/**
* Execute the console command.
*
* @return int
*/
public function handle()
{
//创建server
$server = new \Swoole\WebSocket\Server("0.0.0.0",9501);
//监听连接进入事件
$server->on('Connect', function ($server, $fd) {
$userid = Request::input('userid');
echo "Client: Connect456-$userid.\n";
// echo "fd: $fd";
});
//连接成功回调
$server->on('open', function (\Swoole\WebSocket\Server $server, $request) {
$this->info($request->fd . '链接成功');
$userid = Request::input('userid');
echo "Client: Connect-$userid.\n";
});
//收到消息回调
$server->on('message', function (\Swoole\WebSocket\Server $server, $frame) {
// $content = $frame->data;
$this->info($frame->data . 'msg');
$msg = json_decode($frame->data,true);
$fd = $frame->fd;
if(isset($msg['type'])){
$type = $msg['type'];
if($type == 1){
//绑定用户信息和fd信息
$from_userid = $msg['from_userid'];
$cacheKey = "socket_uid_".$from_userid;
$time = 86400;
$data = [
'userid' => $from_userid,
'fd' => $fd
];
Redis::setex($cacheKey,$time,serialize($data));
$to_userinfo = Redis::get($cacheKey);
if($to_userinfo){
session(['socket_uid_session' => $cacheKey]);
$server->push($fd,$from_userid.'连接成功，可以开始聊天啦');
// $server->push($fd,$fd.'连接成功，可以开始聊天啦');
}else{
$server->push($fd,$fd.'连接失败');
}
}else if($type == 2){
//发送消息
$content = $msg['data'];
$from_userid = $msg['from_userid'];
$this->info($from_userid . 'msg');
$to_userids = $msg['to_userids'];//1,2,3
$to_userids_arr = explode(',',$to_userids);
foreach ($to_userids_arr as $k => $v){
$cacheKey = "socket_uid_".$v;
$to_userinfo = Redis::get($cacheKey);
// $server->push($frame->fd,$cacheKey);
$this->info($to_userinfo . '$to_userinfo');
$to_userinfo = unserialize($to_userinfo);
if(!$to_userinfo){
$this->info($content.'对方不在线');
$server->push($frame->fd,$to_userinfo['userid'].'对方不在线');
}else{
$this->info($content.'对方在线');
$to_fd = $to_userinfo['fd'];
// $content = $content.'-from_userid-'.$from_userid.'-to_userid-'.$to_userid.'-fd-';
$uid = (int)$v;
$this->info($uid.'yonghuid');
//推送信息给指定用户
$server->push($to_fd,$content);
//推送给所有链接
//foreach ($server->connections as $fd){
// $content = $content.$fd;
// $server->push($fd,$content);
//}
}
}
}else if($type == 3){
//发送心跳包
$this->info('心跳包12');
// $server->push($fd,$content);
}
}else{
//连接失败
$server->push($frame->fd,'连接失败,退出重进');
}
});
//关闭链接回调
$server->on('close', function ($ser, $fd) {
//接触用户userid和fd的关系
$cacheKey = session('socket_uid_session');
Redis::del($cacheKey);
$this->info($cacheKey);
$this->info($fd . '断开链接');
});
$server->start();
}
}
3、在网站根目录运行以下命令
php artisan swoole:server
启动服务端
三、客户端实现
<div style="width:600px;margin:0 auto;border:1px solid #ccc;">
<div id="content" style="overflow-y:auto;height:300px;"></div>
<hr />
<div style="height:40px;background:white;">
发送人userid：<input type="text" class="form-control" id="from_userid" placeholder="发送人id" value="{{$userid}}">
接收人userid：<input type="text" class="form-control" id="to_userids" placeholder="接收人id"></br>
发送内容：<input type="text" class="form-control" id="message" placeholder="请输入内容">
<button type="button" class="btn btn-primary" onclick="sendMessage()">点击发送1</button>
</div>
</div>
<script type="text/javascript">
var arr = {};
if(window.WebSocket){
//创建连接
// 端口和ip地址对应不要写错
// var webSocket = new WebSocket("ws://0.0.0.0:9501");
//https请求
// var wss = "wss://zsy.hzyxhfp.com/wss:9501";
//http请求
var wss = "ws://192.168.124.143:9501";
var webSocket = new WebSocket(wss);
// 握手成功
webSocket.onopen = function (event) {
// console.log(3);
console.log('webSocket 链接成功');
// console.log(webSocket.readyState);
if (webSocket.readyState === 1) {
var from_userid = document.getElementById('from_userid').value;
var arr = {};
arr['from_userid'] = from_userid;
arr['type'] = 1;//1：第一次连接，绑定用户信息
var arrJson = JSON.stringify(arr);
webSocket.send(arrJson);
// console.log("connected readyState");
}
};
//收到服务端消息回调
webSocket.onmessage = function (event) {
console.log(webSocket,'onmessage');
var content = document.getElementById('content');
content.innerHTML = content.innerHTML.concat('<p style="margin-left:20px;height:20px;line-height:20px;">'+event.data+'</p>');
}
//监听断开连接
webSocket.onclose = function(event) {
console.log(webSocket,'onclose');
var content = document.getElementById('content');
content.innerHTML = content.innerHTML.concat('<p style="margin-left:20px;height:20px;line-height:20px;">您已断开连接</p>');
//重新连接
}
//发送消息
var sendMessage = function(){
var data = document.getElementById('message').value;
arr['data'] = data;
arr['from_userid'] = document.getElementById('from_userid').value;
arr['to_userids'] = document.getElementById('to_userids').value;
arr['type'] = 2;//2：发送信息
var myJSON = JSON.stringify(arr);
console.log(webSocket);
if (webSocket.readyState === 1) {
//当前用户在线
webSocket.send(myJSON);
// webSocket.send(data);
var content = document.getElementById('content');
content.innerHTML = content.innerHTML.concat('<p style="margin-left:20px;height:20px;line-height:20px;color: blue;">'+data+'</p>');
}else{
//当前用户不在线
console.log('连接失败，请刷新重进');
}
// webSocket.send(myJSON);
// // webSocket.send(data);
// var content = document.getElementById('content');
// content.innerHTML = content.innerHTML.concat('<p style="margin-left:20px;height:20px;line-height:20px;">'+data+'</p>');
}
//每隔5秒发送一个心跳包
setInterval(function(){
console.log('setInterval')
var arr = {};
arr['type'] = 3;
var myJSON = JSON.stringify(arr);
webSocket.send(myJSON)
},5000);
}else{
console.log("您的浏览器不支持WebSocket");
}
</script>
四、配置nginx转发swoole，否则websocket连接不上（此为http请求，如果是HTTPS请求，配置需重新配置）
server {
listen 80;
server_name www.tbk.com;
charset utf-8;
index index.html index.htm index.php;
root /www/shop/public;
proxy_connect_timeout 600s;
proxy_send_timeout 600s;
proxy_read_timeout 600s;
send_timeout 300s;
fastcgi_connect_timeout 600;
fastcgi_send_timeout 600;
fastcgi_read_timeout 600;
uwsgi_read_timeout 600;
#limit_conn perip 2;
#limit_conn perserver 4;
#proxy_read_timeout 6;
#keepalive_timeout 1s;
#location /api/banners/ {
# limit_conn perserver 4;
#}
location / {
#swoole
proxy_pass http://127.0.0.1:9510;
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
#swoole
try_files $uri $uri/ /index.php$is_args$args;
}
location = /favicon.ico { access_log off; log_not_found off; }
location = /robots.txt { access_log off; log_not_found off; }
error_log /usr/local/webserver/nginx/logs/tbk_nginx_error.log error;
error_page 404 /index.php;
location ~ /\. {
deny all;
}
location ~ .*\.(woff|js|css|png|jpg|gif|swf|ico|pdf|mov|fla|zip|rar)$ {
try_files $uri =404;
}
location ~ .*\.(woff|jpg|jpeg|png|gif|ico|css|js)$ {
expires 1h;
add_header Cache-Control public;
add_header Pragma public;
add_header Vary Accept-Encoding;
}
location ~ \.php(.*)$ {
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_split_path_info ^((?U).+\.php)(/?.+)$;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param PATH_INFO $fastcgi_path_info;
fastcgi_param PATH_TRANSLATED $document_root$fastcgi_path_info;
include fastcgi_params;
}
location ~ /\.(?!well-known).* {
deny all;
}
# security headers
add_header X-Frame-Options "SAMEORIGIN" ;
add_header X-XSS-Protection "1; mode=block" ;
add_header X-Content-Type-Options "nosniff" ;
add_header Referrer-Policy "no-referrer-when-downgrade" ;
add_header Content-Security-Policy "default-src * data: 'unsafe-eval' 'unsafe-inline'" ;
add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" ;
# gzip
gzip on;
gzip_vary on;
gzip_proxied any;
gzip_comp_level 6;
gzip_types text/plain text/css text/xml application/json application/javascript application/xml+rss application/atom+xml image/svg+xml;
}
在原本配置上，介绍swoole这一段配置
如果不出意外，那么到此时websocket应该就连接成功了
但是因为我的后端逻辑中使用了redis，所以还得配置redis
五、安装配置redis（默认已安装，没安装的百度安装一下）
.env文件配置
CACHE_DRIVER=redis
REDIS_CLIENT=predis
QUEUE_CONNECTION=redis
REDIS_HOST=127.0.0.1
REDIS_PASSWORD=null
REDIS_PORT=6379
启动redis
此时发送消息
至此实现了简易聊天室的功能
6、刚才我们是通过手动在根目录运行 php artisan swoole:server启动服务器，但不可能一直使用终端运行该命令，所以为了让 swoole:server进程永久地在后台运行，应该使用一个进程监视器，如 Supervisor，以确保其不会停止运行。
如何安装使用请查看
Laravel + CentOS7配置Supervisor守护进程
1、安装Supervisor
yum install supervisor
如果提示没有可用软件包
先执行命令
yum -y install epel-release
然后在执行上面的命令
yum install supervisor
安装完成
2、安装完成后，修改 /etc/supervisord.conf 文件，在文件末尾 [include] 上方添加代码：
#守护进程应用名称
[program:laravel-swoole-server]
#python字串表达式，用来表示 supervisor 进程启动的名称
process_name=%(program_name)s_%(process_num)02d
#网站目录及被监控的进程启动命令
command=php /www/shop/artisan swoole:server
#supervisord 启动时，该进程跟着启动
autostart=true
#自动重启
autorestart=true
#以 root 的身份运行
user=root
#进程数
numprocs=8
#重定向 stderr
redirect_stderr=true
#进程的日志文件
stdout_logfile=/www/shop/artisan.log
stopwaitsecs=3600
主要要修改command后面的网站的目录位置
应该确保 stopwaitsecs 的值大于运行时间最长的任务所消耗的秒数。否则，Supervisor 可能会在任务完成前终止任务
3、配置文件修改后，执行 sudo supervisorctl reread
4、如果报错:
error: <class ‘socket.error’>, [Errno 2] No such file or directory: file: /usr/lib64/python2.7/socket.py
则先执行
supervisord
再依次执行
sudo supervisorctl reread
sudo supervisorctl update
sudo supervisorctl start laravel-swoole-server:*
完成后可以查看进程是否正常运行：
ps -ef | grep artisan
5、如果要同时守护多个进程
最简单的场景就是在配置文件当中定义多个program:
[program: A]
[program: B]
[program: C]
这样，我们可以使用supervisorctl [start|stop] [program_name]的方式来方便的启动、重启指定的进程
如果在 Laravel 中修改了代码，需要重启 Supervisor 才能生效
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