php curl批处理--可控并发异步

通常情况下 PHP 中的 cURL 是阻塞运行的，就是说创建一个 cURL 请求以后必须等它执行成功或者超时才会执行下一个请求:API接口访问一般会首选CURL

在实际项目或者自己编写小工具(比如新闻聚合,商品价格监控,比价)的过程中, 通常需要从第3方网站或者API接口获取数据, 在需要处理1个URL队列时, 为了提高性能, 可以采用cURL提供的curl_multi_*族函数实现简单的并发.

<?php
include 'curl.class.php';
function callback($response, $info, $error, $request)
{
    echo 'response:<br>';
    print_r($response);

    echo '<br>' . date("Y-m-d H:i:s") . '&nbsp;&nbsp;&nbsp;<br>';
    echo '<br>' . str_repeat("-", 100) . '<br>';
}

$USER_COOKIE = (!empty($_REQUEST['cookie'])) ? $_REQUEST['cookie'] : file_get_contents("cookie.txt");

$curl = new Curl ("callback");

$data = array(
    array(
        'url' => 'http://dyactive2.vip.xunlei.com/com_sign/?game=qmr&type=rec_gametime&referfrom=&rt=0.42521539455332336', //秦美人
        'method' => 'POST',
        'post_data' => '',
        'header' => null,
        'options' => array(
            CURLOPT_REFERER => "http://niu.xunlei.com/entergame/?gameNo=qmr&fenQuNum=3",
            CURLOPT_COOKIE => $USER_COOKIE,
        )
    ),
    array(
        'url' => 'http://dyactive2.vip.xunlei.com/com_sign/?game=sq&type=rec_gametime&referfrom=&rt=0.42521539455332336', //神曲
        'method' => 'POST',
        'post_data' => '',
        'header' => null,
        'options' => array(
            CURLOPT_REFERER => "http://niu.xunlei.com/entergame/?gameNo=sq&fenQuNum=41",
            CURLOPT_COOKIE => $USER_COOKIE,
        )
    ),
    array(
        'url' => 'http://dyactive2.vip.xunlei.com/com_sign/?game=frxz&type=rec_gametime&referfrom=&rt=0.42521539455332336', //凡人修真
        'method' => 'POST',
        'post_data' => '',
        'header' => null,
        'options' => array(
            CURLOPT_REFERER => "http://niu.xunlei.com/entergame/?gameNo=frxz&fenQuNum=3",
            CURLOPT_COOKIE => $USER_COOKIE,
        )
    ),
    array(
        'url' => 'http://dyactive2.vip.xunlei.com/com_sign/?game=smxj&type=rec_gametime&referfrom=&rt=0.42521539455332336', //神魔仙界
        'method' => 'POST',
        'post_data' => '',
        'header' => null,
        'options' => array(
            CURLOPT_REFERER => "http://niu.xunlei.com/entergame/?gameNo=smxj&fenQuNum=2",
            CURLOPT_COOKIE => $USER_COOKIE,
        )
    ),
    array(
        'url' => 'http://dyactive2.vip.xunlei.com/com_sign/?game=qsqy&type=rec_gametime&referfrom=&rt=0.42521539455332336', //倾世情缘
        'method' => 'POST',
        'post_data' => '',
        'header' => null,
        'options' => array(
            CURLOPT_REFERER => "http://niu.xunlei.com/entergame/?gameNo=qsqy&fenQuNum=11",
            CURLOPT_COOKIE => $USER_COOKIE,
        )
    ),
);

foreach ($data as $val) {
    $request = new Curl_request ($val ['url'], $val ['method'], $val ['post_data'], $val ['header'], $val ['options']);
    $curl->add($request);
}

$curl->execute();
echo $curl->display_errors();

使用下来效果很好，没有副作用，并发数可控，应用之处多多，自己发挥想象吧

<?php
/**
 * cURL批量处理  工具类
 * 
 * @since Version 1.0
 * @author Justmepzy <[email protected]>
 * @link http://t.qq.com/JustPzy
 */


/**
 *单一的请求对象
 */
class Curl_request {
	public $url 		= '';
	public $method 		= 'GET';
	public $post_data 	= null;
	public $headers 	= null;
	public $options 	= null;
	/**
	 * 
	 * @param string $url
	 * @param string $method
	 * @param string $post_data
	 * @param string $headers
	 * @param array $options
	 * @return void
	 */
	public function __construct($url, $method = 'GET', $post_data = null, $headers = null, $options = null) {
		$this->url = $url;
		$this->method = strtoupper( $method );
		$this->post_data = $post_data;
		$this->headers = $headers;
		$this->options = $options;
	}
	/**
	 * @return void
	 */
	public function __destruct() {
		unset ( $this->url, $this->method, $this->post_data, $this->headers, $this->options );
	}
}
/**
 * 包含请求列队处理
 */
class Curl {
	/**
	 * 请求url个数
	 * @var int
	 */
	private $size 			= 5;
	/**
	 * 等待所有cURL批处理中的活动连接等待响应时间
	 * @var int
	 */
	private $timeout 		= 5;
	/**
	 * 完成请求回调函数
	 * @var string
	 */
	private $callback 		= null;
	/**
	 * cRUL配置
	 * @var array
	 */
	private $options 		= array (CURLOPT_SSL_VERIFYPEER => 0,CURLOPT_RETURNTRANSFER => 1,CURLOPT_CONNECTTIMEOUT => 30 );
	/**
	 * 请求头
	 * @var array
	 */
	private $headers 		= array ();
	/**
	 * 请求列队
	 * @var array
	 */
	private $requests	 	= array ();
	/**
	 * 请求列队索引
	 * @var array
	 */
	private $request_map 	= array ();
	/**
	 * 错误
	 * @var array
	 */
	private $errors 		= array ();
	/**
	 * @access public
	 * @param string $callback 回调函数
	 * 该函数有4个参数($response,$info,$error,$request)
	 * $response	url返回的body
	 * $info		cURL连接资源句柄的信息
	 * $error		错误
	 * $request		请求对象
	 */
	public function __construct($callback = null) {
		$this->callback = $callback;
	}
	/**
	 * 添加一个请求对象到列队
	 * @access public
	 * @param object $request
	 * @return boolean
	 */
	public function add($request) {
		$this->requests [] = $request;
		return TRUE;
	}
	/**
	 * 创建一个请求对象并添加到列队
	 * @access public
	 * @param string $url
	 * @param string $method
	 * @param string $post_data
	 * @param string $headers
	 * @param array $options
	 * @return boolean
	 */
	public function request($url, $method = 'GET', $post_data = null, $headers = null, $options = null) {
		$this->requests [] = new Curl_request ( $url, $method, $post_data, $headers, $options );
		return TRUE;
	}
	/**
	 * 创建GET请求对象
	 * @access public
	 * @param string $url
	 * @param string $headers
	 * @param array $options
	 * @return boolean
	 */
	public function get($url, $headers = null, $options = null) {
		return $this->request ( $url, "GET", null, $headers, $options );
	}
	/**
	 * 创建一个POST请求对象
	 * @access public
	 * @param string $url
	 * @param string $post_data
	 * @param string $headers
	 * @param array $options
	 * @return boolean
	 */
	public function post($url, $post_data = null, $headers = null, $options = null) {
		return $this->request ( $url, "POST", $post_data, $headers, $options );
	}
	/**
	 * 执行cURL
	 * @access public
	 * @param int $size 最大连接数
	 * @return Ambigous <boolean, mixed>|boolean
	 */
	public function execute($size = null) {
		if (sizeof ( $this->requests ) == 1) {
			return $this->single_curl ();
		} else {
			return $this->rolling_curl ( $size );
		}
	}
	/**
	 * 单个url请求
	 * @access private
	 * @return mixed|boolean
	 */
	private function single_curl() {
		$ch = curl_init ();
		$request = array_shift ( $this->requests );
		$options = $this->get_options ( $request );
		curl_setopt_array ( $ch, $options );
		$output = curl_exec ( $ch );
		$info = curl_getinfo ( $ch );
		
		// it's not neccesary to set a callback for one-off requests
		if ($this->callback) {
			$callback = $this->callback;
			if (is_callable ( $this->callback )) {
				call_user_func ( $callback, $output, $info, $request );
			}
		} else
			return $output;
		return true;
	}
	/**
	 * 多个url请求
	 * @access private
	 * @param int $size 最大连接数
	 * @return boolean
	 */
	private function rolling_curl($size = null) {
		if ($size)
			$this->size = $size;
		else 
			$this->size = count($this->requests);
		if (sizeof ( $this->requests ) < $this->size)
			$this->size = sizeof ( $this->requests );
		if ($this->size < 2)
			$this->set_error ( 'size must be greater than 1' );
		$master = curl_multi_init ();
		//添加cURL连接资源句柄到map索引
		for($i = 0; $i < $this->size; $i ++) {
			$ch = curl_init ();
			$options = $this->get_options ( $this->requests [$i] );
			curl_setopt_array ( $ch, $options );
			curl_multi_add_handle ( $master, $ch );
			
			$key = ( string ) $ch;
			$this->request_map [$key] = $i;
		}
		
		$active = $done = null;
		do {
			while ( ($execrun = curl_multi_exec ( $master, $active )) == CURLM_CALL_MULTI_PERFORM )
				;
			if ($execrun != CURLM_OK)
				break;
			//有一个请求完成则回调
			while ( $done = curl_multi_info_read ( $master ) ) {
				//$done	完成的请求句柄
				$info = curl_getinfo ( $done ['handle'] );//
				$output = curl_multi_getcontent ( $done ['handle'] );//
				$error = curl_error ( $done ['handle'] );//
				
				$this->set_error ( $error );
				
				//调用回调函数,如果存在的话
				$callback = $this->callback;
				if (is_callable ( $callback )) {
					$key = ( string ) $done ['handle'];
					$request = $this->requests [$this->request_map [$key]];
					unset ( $this->request_map [$key] );
					call_user_func ( $callback, $output, $info, $error, $request );
				}
				curl_close ( $done ['handle'] );
				//从列队中移除已经完成的request
				curl_multi_remove_handle ( $master, $done ['handle'] );
			}
			//等待所有cURL批处理中的活动连接
			if ($active)
				curl_multi_select ( $master, $this->timeout );
		} while ( $active );
		//完成关闭
		curl_multi_close ( $master );
		return true;
	}
	/**
	 * 获取没得请求对象的cURL配置
	 * @access private
	 * @param object $request
	 * @return array
	 */
	private function get_options($request) {
		$options = $this->__get ( 'options' );
		if (ini_get ( 'safe_mode' ) == 'Off' || ! ini_get ( 'safe_mode' )) {
			$options [CURLOPT_FOLLOWLOCATION] = 1;
			$options [CURLOPT_MAXREDIRS] = 5;
		}
		$headers = $this->__get ( 'headers' );
		
		if ($request->options) {
			$options = $request->options + $options;
		}
		
		$options [CURLOPT_URL] = $request->url;
		
		if ($request->post_data && strtolower($request->method) == 'post' ) {
			$options [CURLOPT_POST] = 1;
			$options [CURLOPT_POSTFIELDS] = $request->post_data;
		}
		if ($headers) {
			$options [CURLOPT_HEADER] = 0;
			$options [CURLOPT_HTTPHEADER] = $headers;
		}
		
		return $options;
	}
	/**
	 * 设置错误信息
	 * @access public
	 * @param string $msg
	 */
	public function set_error($msg) {
		if (! empty ( $msg ))
			$this->errors [] = $msg;
	}
	/**
	 * 获取错误信息
	 * @access public
	 * @param string $open
	 * @param string $close
	 * @return string
	 */
	public function display_errors($open = '<p>', $close = '</p>') {
		$str = '';
		foreach ( $this->errors as $val ) {
			$str .= $open . $val . $close;
		}
		return $str;
	}
	/**
	 * @access public
	 * @param string $name
	 * @param string $value
	 * @return boolean
	 */
	public function __set($name, $value) {
		if ($name == 'options' || $name == 'headers') {
			$this->{$name} = $value + $this->{$name};
		} else {
			$this->{$name} = $value;
		}
		return TRUE;
	}
	/**
	 * 
	 * @param string $name
	 * @return mixed
	 * @access public
	 */
	public function __get($name) {
		return (isset ( $this->{$name} )) ? $this->{$name} : null;
	}
	/**
	 * @return void
	 * @access public
	 */
	public function __destruct() {
		unset ( $this->size, $this->timeout, $this->callback, $this->options, $this->headers, $this->requests, $this->request_map, $this->errors );
	}
}
// END Curl Class
/* End of file curl.class.php */