php curl批处理实现可控并发异步操作示例

* @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,$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,$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,$options = null) { return $this->request ( $url,"GET",null,$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",$options ); } /** * 执行cURL * @access public * @param int $size 最大连接数 * @return Ambigous |boolean */ public function execute($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,$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 ( $callback,$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 = '

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