swoole是一个php的网络通信框架，可以简单支持http服务。按照官方介绍，如果遇到mysql或者广播消息等耗时或阻塞的业务，需要开启task去提供服务，在Finish回调中处理结果(定时器中如果有阻塞任务，会导致work进程无法提供服务)。
（需要安装配置扩展，如果源码编译运行提示glibc版本不兼容，可以用pecl install swoole）
针对一些数据不常变化的部分，我们可以用定时器读取到内存，然后提供服务，这样对mysql压力小了很多。大致示例代码如下：
#!/usr/bin/php
<?php
date_default_timezone_set("Asia/Shanghai");
class RotateMap
{
public function __construct ()
{
$this->d = array(array(), array());
$this->idx = 0;
}
public function &get ()
{
return $this->d[$this->idx];
}
public function set ($t)
{
$this->d[!$this->idx] = $t;
$this->swap();
}
private function swap ()
{
$this->idx = !$this->idx;
}
private $d;
private $idx;
};
class Server
{
private $serv;
private $upgrade;
private $allowurl;
private $checkurl;
const RELOAD_SECOND_INTERVAL = 1000;
const RELOAD_MINUTE_INTERVAL = 60000;
const RELOAD_HOUR_INTERVAL = 360000;
const RELOAD_DAY_INTERVAL = 86400000;
const ERROR_LOG = "/tmp/swoole.error.log";
const LOCAL_TXT = "/tmp/localfile";
public function __construct ()
{
$this->upgrade = new RotateMap();
$this->allowurl = new RotateMap();
$this->checkurl = new RotateMap();
$this->serv = new swoole_http_server("127.0.0.1", 1987);
$this->serv->set(array('worker_num' =>1,
'daemonize' => true,
'max_request' =>10000,
'dispatch_mode' =>3,
'debug_mode' =>1,
'task_worker_num' =>1,
'log_file' =>'/tmp/swoole.log'));
$this->serv->on('Start', array($this, 'onStart'));
$this->serv->on('Request', array($this, 'onRequest'));
$this->serv->on('Task', array($this, 'onTask'));
$this->serv->on('Finish', array($this, 'onFinish'));
$this->serv->on('WorkerStart', array($this, 'onWorkerStart'));
$this->serv->on('Timer', array($this, 'reloadDB'));
$this->serv->start();
}
public function onStart($serv)
{
}
private function slog($msg){
echo "[".date('Y-m-d H:i:s')." #".$this->serv->worker_pid.".0] INFO ".$msg.PHP_EOL;
}
public function onWorkerStart($serv, $worker_id)
{
if($serv->taskworker == false){
//Init Data
$this->slog("InitData Begin");
$this->reloadDBUpgrade(true);
$this->reloadDB1(true);
$this->reloadDB2(true);
$this->slog("InitData Done");
$serv->addtimer(Server::RELOAD_HOUR_INTERVAL);
}
}
private function reloadDBUpgrade($save = false){
try{
$dsn='mysql:host=myhost;dbname=mydb;';
$dbh=new PDO($dsn,"myusername","mypassword");
$dbh->query('set names utf8;');
$stmt=$dbh->query('SELECT id,name FROM tb_version ORDER BY id DESC LIMIT 1');
while($row = $stmt->fetch()){
$verinfo = array(
"id" => $row["id"],
"name" => $row["name"],
);
break;
}
}
catch(PDOException $e){
error_log($e->getMessage(),3,Server::ERROR_LOG);
}
$dbh = null;
if($save){
$this->upgrade->set($verinfo);
}else{
return $verinfo;
}
}
private function reloadDB1($save = false){
$handle = fopen(Server::LOCAL_TXT, "r");
if(!$handle){
return;
}
$data = array();
while (!feof ($handle))
{
$buffer = fgets($handle, 1024);
$domain = trim($buffer);
if(strlen($domain)>=5){
array_push($data, $domain);
}
}
fclose ($handle);
if($save){
$this->allowurl->set($data);
}else{
return $data;
}
}
private function reloadDB2($save = false){
$handle = fopen(Server::CHECK_TXT, "r");
if(!$handle){
return;
}
$data = array();
while (!feof ($handle))
{
$buffer = fgets($handle, 1024);
$info = explode("|",trim($buffer));
if(count($info)==2){
$domain = $info[0];
$sortid = $info[1];
if(strlen($domain)>=5 && is_numeric($sortid)){
$data[$domain] = $sortid;
}
}
}
fclose ($handle);
if($save){
$this->checkurl->set($data);
}else{
return $data;
}
}
public function reloadDB($serv, $interval)
{
switch($interval)
{
case Server::RELOAD_HOUR_INTERVAL:
$param = array("job", "reload");
$serv->task($param);
break;
}
}
public function onRequest (swoole_http_request $request,
swoole_http_response $response)
{
$code = 200;
$request_uri = $request->server["request_uri"];
$request_method = $request->server["request_method"];
$remote_addr = $request->server["remote_addr"];
$getdata = $postdata = '{}';
if(isset($request->get)){
$getdata = json_encode($request->get);
}
if(isset($request->post)){
$postdata = json_encode($request->post);
}
$this->slog("$remote_addr $request_method $request_uri $getdata $postdata");
switch($request_uri){
case '/url1':
$id =isset($request->get["id"])?$request->get["id"]:null;
if($id == null){
$code = 400;
$res = "400 bad request";
}else{
$data = &$this->upgrade->get();
if($id == $data["id"]){
$res = array("hasNewVersion"=>false);
}else{
$res = array("hasNewVersion"=>true,"versionInfo"=>$this->upgrade->get());
}
}
$res = json_encode($res, JSON_UNESCAPED_SLASHES);
break;
case '/url2':
$host = isset($request->post["host"])?$request->post["host"]:null;
$referer = isset($request->post["referer"])?$request->post["referer"]:null;
$v1 = 1;
$v2 = 1;
$data = &$this->allowurl->get();
if($host){
$info = explode(".", $host);
if(count($info)>=2){
$host = $info[count($info)-2].".".$info[count($info)-1];
}
if(in_array($host,$data)){
$v1 = 0;
}
}
if($referer){
$info = explode(".", $referer);
if(count($info)>=2){
$referer = $info[count($info)-2].".".$info[count($info)-1];
}
if(in_array($referer,$data)){
$v2 = 0;
}
}
$res = "$v1|$v2";
break;
case '/url3':
$host = isset($request->post["host"])?$request->post["host"]:null;
$url = isset($request->post["url"])?$request->post["url"]:null;
$data = &$this->checkurl->get();
$v1 = 0;
if($host){
$info = explode(".", $host);
if(count($info)>=2){
$host = $info[count($info)-2].".".$info[count($info)-1];
}
if(array_key_exists($host,$data)){
$v1 = $data[$host];
}
}
$res = $v1;
break;
default:
$code = 404;
$res = "404 not found";
}
$response->status($code);
$response->header("Server", "nginx");
$response->header("Content-Type", "text/html");
$response->end($res);
}
public function onTask ($serv, $task_id, $from_id, $data)
{
$this->slog("ReloadData Begin");
$ret = array();
$ret["upgrade"] = $this->reloadDBUpgrade();
$ret["allowurl"] = $this->reloadDB1();
$ret["checkurl"] = $this->reloadDB2();
$this->slog("ReloadData Done");
return $ret;
}
public function onFinish ($serv, $task_id, $data)
{
if(count($data["allowurl"])>0){
$this->allowurl->set($data["allowurl"]);
}else{
error_log("load allowurl error",3,Server::ERROR_LOG);
}
if(count($data["checkurl"])>0){
$this->checkurl->set($data["checkurl"]);
}else{
error_log("load checkurl error",3,Server::ERROR_LOG);
}
$this->upgrade->set($data["upgrade"]);
}
}
$server = new Server ();
?>