php curl批处理实现可控并发异步操作示例

网络编程 2024/11/8 佚名

3 2 1

本文实例讲述了php curl批处理实现可控并发异步操作。分享给大家供大家参考，具体如下：

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.

<"Y-m-d H:i:s") . '&nbsp;&nbsp;&nbsp;<br>';
 echo '<br>' . str_repeat("-", 100) . '<br>';
}
$USER_COOKIE = (!empty($_REQUEST['cookie'])) "cookie.txt");
$curl = new Curl ("callback");
$data = array(
 array(
  'url' => 'http://dyactive2.vip.xunlei.com/com_sign/"http://niu.xunlei.com/entergame/",
   CURLOPT_COOKIE => $USER_COOKIE,
  )
 ),
 array(
  'url' => 'http://dyactive2.vip.xunlei.com/com_sign/"http://niu.xunlei.com/entergame/",
   CURLOPT_COOKIE => $USER_COOKIE,
  )
 ),
 array(
  'url' => 'http://dyactive2.vip.xunlei.com/com_sign/"http://niu.xunlei.com/entergame/",
   CURLOPT_COOKIE => $USER_COOKIE,
  )
 ),
 array(
  'url' => 'http://dyactive2.vip.xunlei.com/com_sign/"http://niu.xunlei.com/entergame/",
   CURLOPT_COOKIE => $USER_COOKIE,
  )
 ),
 array(
  'url' => 'http://dyactive2.vip.xunlei.com/com_sign/"http://niu.xunlei.com/entergame/",
   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

<"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} )) "_blank" href="https://www.jb51.net/Special/66.htm">php curl用法总结》、《PHP网络编程技巧总结》、《PHP数组(Array)操作技巧大全》、《php字符串(string)用法总结》、《PHP数据结构与算法教程》、《php程序设计算法总结》、《PHP运算与运算符用法总结》及《php常见数据库操作技巧汇总》
希望本文所述对大家PHP程序设计有所帮助。

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