PHP code example of calabashdoll / curl-future

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

calabashdoll / curl-future example snippets

/**
 * 获得一个延迟执行curl的类
 * @param $url 请求url地址
 * @param $options = array(), 
 *		header:头信息(Array), 
 *		proxy_url:代理服务器地址, 
 *		timeout:超时时间，可以小于1
 *		post_data: string|array post数据
 * @return CurlFuture\HttpFuture
 */
function curl_future($url, $options = array());

echo curl_future("http://s.newhua.com/2015/1113/304528.shtml?4", array())
		->fetch();

$f4 = curl_future("http://s.newhua.com/2015/1113/304528.shtml?4");
$f5 = curl_future("http://s.newhua.com/2015/1113/304528.shtml?5");

echo strlen($f1->fetch());	//这个地方会并行执行
echo "\n";
echo strlen($f2->fetch());
echo "\n";

echo curl_future("http://s.newhua.com/2015/1113/304528.shtml")
	->then(function($data){
		return strlen($data);
	})
	->then(function($len){
		return "Length: $len";
	})
	->fetch();

class BookModel{
	//接口串行调用的示例，通过then函数将处理过程串联起来
	static public function getTitleFuture($id){
		return curl_future("http://111.202.7.252/{$id}")
			->then(function($data){
				return strlen($data);
			})
			->then(function($data){
				$url = "http://111.202.7.252/{$data}";
				$html = curl_future($url)->fetch();
				preg_match('/title(.+?)\/title/is', $html, $matches);
				return $matches[1];
			});
	}
	
	//普通接口调用+后续处理的示例
	static public function getContentFuture($id){
		return curl_future("http://111.202.7.252/{$id}")
				->then(function($data){
					return substr($data, 0, 100);
				});
	}
}

//多个请求并行发出示例，这个地方用Model封装起来，便于和不同框架相结合
$t1 = BookModel::getTitleFuture('111');
$t2 = BookModel::getTitleFuture('222');
$t3 = BookModel::getTitleFuture('333');

$c1 = BookModel::getContentFuture('111');
$c2 = BookModel::getContentFuture('222');
$c3 = BookModel::getContentFuture('333');

//fetch函数会阻塞住，这个地方会把所有队列里面的请求发出，直到需要获取的t1的请求执行完再返回
var_dump($t1->fetch());
//由于上个fetch已经阻塞过了，下面的这个fetch很可能无需阻塞直接返回，也有可能上面的fetch没有执行完，此处阻塞住继续执行请求，直到拿到t2的数据
var_dump($t2->fetch());
var_dump($c3->fetch());

	//task_manager.php
	public function fetch($ch){
		$chKey = (int)$ch;

		//如果两个队列里面都没有，那么退出
		if(!array_key_exists($chKey, $this->runningTasks) && !array_key_exists($chKey, $this->finishedTasks) )return false;
	
		$active = 1;
		do{
			//如果任务完成了，那么退出
			if(array_key_exists($chKey, $this->finishedTasks))break;

			//执行multiLoop，直到该任务完成
			$active = $this->multiLoop();
			//如果执行出错，那么停止循环
			if($active === false)break;
		}while(1);
		
		return $this->finishTask($ch);
	}