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467 lines
13 KiB
PHP
467 lines
13 KiB
PHP
<?php
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/**
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* Curl操作类
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*
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* Licensed under The MIT License
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* For full copyright and license information, please see the MIT-LICENSE.txt
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* Redistributions of files must retain the above copyright notice.
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*
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* @author seatle<seatle@foxmail.com>
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* @copyright seatle<seatle@foxmail.com>
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* @link http://www.epooll.com/
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* @license http://www.opensource.org/licenses/mit-license.php MIT License
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*/
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class rolling_curl
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{
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/**
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* @var float
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*
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* 同时运行任务数
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* 例如：有8个请求，则会被分成两批，第一批5个请求，第二批3个请求
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* 注意：采集知乎的时候，5个是比较稳定的，7个以上就开始会超时了，多进程就没有这样的问题，因为多进程很少几率会发生并发
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*/
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public $window_size = 5;
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/**
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* @var float
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*
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* Timeout is the timeout used for curl_multi_select.
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*/
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private $timeout = 10;
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/**
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* @var string|array
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*
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* 应用在每个请求的回调函数
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*/
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public $callback;
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/**
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* @var array
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*
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* 设置默认的请求参数
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*/
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protected $options = array(
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CURLOPT_SSL_VERIFYPEER => 0,
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CURLOPT_RETURNTRANSFER => 1,
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// 注意：TIMEOUT = CONNECTTIMEOUT + 数据获取时间，所以 TIMEOUT 一定要大于 CONNECTTIMEOUT，否则 CONNECTTIMEOUT 设置了就没意义
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// "Connection timed out after 30001 milliseconds"
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CURLOPT_CONNECTTIMEOUT => 30,
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CURLOPT_TIMEOUT => 60,
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CURLOPT_RETURNTRANSFER => 1,
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CURLOPT_HEADER => 0,
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// 在多线程处理场景下使用超时选项时，会忽略signals对应的处理函数，但是无耐的是还有小概率的crash情况发生
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CURLOPT_NOSIGNAL => 1,
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CURLOPT_USERAGENT => "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.89 Safari/537.36",
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);
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/**
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* @var array
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*/
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private $headers = array();
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/**
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* @var Request[]
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*
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* 请求队列
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*/
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private $requests = array();
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/**
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* @var RequestMap[]
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*
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* Maps handles to request indexes
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*/
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private $requestMap = array();
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public function __construct()
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{
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}
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/**
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* set timeout
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*
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* @param init $timeout
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* @return
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*/
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public function set_timeout($timeout)
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{
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$this->options[CURLOPT_TIMEOUT] = $timeout;
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}
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/**
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* set proxy
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*
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*/
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public function set_proxy($proxy)
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{
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$this->options[CURLOPT_PROXY] = $proxy;
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}
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/**
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* set referer
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*
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*/
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public function set_referer($referer)
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{
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$this->options[CURLOPT_REFERER] = $referer;
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}
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/**
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* 设置 user_agent
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*
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* @param string $useragent
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* @return void
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*/
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public function set_useragent($useragent)
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{
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$this->options[CURLOPT_USERAGENT] = $useragent;
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}
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/**
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* 设置COOKIE
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*
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* @param string $cookie
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* @return void
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*/
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public function set_cookie($cookie)
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{
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$this->options[CURLOPT_COOKIE] = $cookie;
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}
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/**
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* 设置COOKIE JAR
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*
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* @param string $cookie_jar
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* @return void
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*/
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public function set_cookiejar($cookiejar)
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{
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$this->options[CURLOPT_COOKIEJAR] = $cookiejar;
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}
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/**
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* 设置COOKIE FILE
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*
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* @param string $cookie_file
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* @return void
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*/
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public function set_cookiefile($cookiefile)
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{
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$this->options[CURLOPT_COOKIEFILE] = $cookiefile;
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}
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/**
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* 获取内容的时候是不是连header也一起获取
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*
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* @param mixed $http_raw
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* @return void
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* @author seatle <seatle@foxmail.com>
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* @created time :2016-09-18 10:17
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*/
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public function set_http_raw($http_raw = false)
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{
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$this->options[CURLOPT_HEADER] = $http_raw;
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}
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/**
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* 设置IP
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*
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* @param string $ip
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* @return void
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*/
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public function set_ip($ip)
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{
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$headers = array(
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'CLIENT-IP'=>$ip,
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'X-FORWARDED-FOR'=>$ip,
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);
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$this->headers = $this->headers + $headers;
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}
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/**
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* 设置Headers
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*
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* @param string $headers
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* @return void
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*/
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public function set_headers($headers)
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{
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$this->headers = $this->headers + $headers;
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}
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/**
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* 设置Hosts
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*
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* @param string $hosts
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* @return void
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*/
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public function set_hosts($hosts)
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{
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$headers = array(
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'Host'=>$hosts,
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);
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$this->headers = $this->headers + $headers;
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}
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/**
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* 设置Gzip
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*
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* @param string $hosts
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* @return void
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*/
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public function set_gzip($gzip)
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{
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if ($gzip)
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{
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$this->options[CURLOPT_ENCODING] = 'gzip';
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}
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}
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public function request($url, $method = "GET", $fields = array(), $headers = array(), $options = array())
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{
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$this->requests[] = array('url'=>$url,'method'=>$method,'fields'=>$fields,'headers'=>$headers,'options'=>$options);
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return true;
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}
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public function get_options($request)
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{
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$options = $this->options;
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$headers = $this->headers;
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if (ini_get('safe_mode') == 'Off' || !ini_get('safe_mode'))
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{
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$options[CURLOPT_FOLLOWLOCATION] = 1;
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$options[CURLOPT_MAXREDIRS] = 5;
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}
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// 如果是 get 方式，直接拼凑一个 url 出来
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if (strtolower($request['method']) == 'get' && !empty($request['fields']))
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{
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$url = $request['url'] . "?" . http_build_query($request['fields']);
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}
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// 如果是 post 方式
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if (strtolower($request['method']) == 'post')
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{
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$options[CURLOPT_POST] = 1;
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$options[CURLOPT_POSTFIELDS] = $request['fields'];
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}
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// append custom options for this specific request
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if ($request['options'])
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{
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$options = $request['options'] + $options;
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}
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if ($request['headers'])
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{
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$headers = $request['headers'] + $headers;
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}
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// 随机绑定 hosts，做负载均衡
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//if (self::$hosts)
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//{
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//$parse_url = parse_url($url);
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//$host = $parse_url['host'];
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//$key = rand(0, count(self::$hosts)-1);
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//$ip = self::$hosts[$key];
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//$url = str_replace($host, $ip, $url);
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//self::$headers = array_merge( array('Host:'.$host), self::$headers );
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//}
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// header 要这样拼凑
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$headers_tmp = array();
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foreach ($headers as $k=>$v)
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{
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$headers_tmp[] = $k.":".$v;
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}
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$headers = $headers_tmp;
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$options[CURLOPT_URL] = $request['url'];
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$options[CURLOPT_HTTPHEADER] = $headers;
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return $options;
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}
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/**
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* GET 请求
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*
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* @param string $url
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* @param array $headers
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* @param array $options
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* @return bool
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*/
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public function get($url, $fields = array(), $headers = array(), $options = array())
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{
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return $this->request($url, 'get', $fields, $headers, $options);
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}
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/**
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* $fields 有三种类型:1、数组；2、http query；3、json
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* 1、array('name'=>'yangzetao') 2、http_build_query(array('name'=>'yangzetao')) 3、json_encode(array('name'=>'yangzetao'))
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* 前两种是普通的post，可以用$_POST方式获取
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* 第三种是post stream( json rpc，其实就是webservice )，虽然是post方式，但是只能用流方式 http://input 后者 $HTTP_RAW_POST_DATA 获取
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*
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* @param string $url
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* @param array $fields
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* @param array $headers
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* @param array $options
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* @return void
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*/
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public function post($url, $fields = array(), $headers = array(), $options = array())
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{
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return $this->request($url, 'post', $fields, $headers, $options);
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}
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/**
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* Execute processing
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*
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* @param int $window_size Max number of simultaneous connections
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* @return string|bool
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*/
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public function execute($window_size = null)
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{
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$count = sizeof($this->requests);
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if ($count == 0)
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{
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return false;
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}
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// 只有一个请求
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elseif ($count == 1)
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{
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return $this->single_curl();
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}
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else
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{
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// 开始 rolling curl，window_size 是最大同时连接数
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return $this->rolling_curl($window_size);
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}
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}
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private function single_curl()
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{
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$ch = curl_init();
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// 从请求队列里面弹出一个来
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$request = array_shift($this->requests);
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$options = $this->get_options($request);
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curl_setopt_array($ch, $options);
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$output = curl_exec($ch);
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$info = curl_getinfo($ch);
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$error = null;
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if ($output === false)
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{
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$error = curl_error( $ch );
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}
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//$output = substr($output, 10);
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//$output = gzinflate($output);
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// 其实一个请求的时候没是么必要回调，直接返回数据就好了，不过这里算是多一个功能吧，和多请求保持一样的操作
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if ($this->callback)
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{
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if (is_callable($this->callback))
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{
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call_user_func($this->callback, $output, $info, $request, $error);
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}
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}
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else
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{
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return $output;
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}
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return true;
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}
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private function rolling_curl($window_size = null)
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{
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// 如何设置了最大任务数
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if ($window_size)
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$this->window_size = $window_size;
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// 如果请求数 小于 任务数，设置任务数为请求数
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if (sizeof($this->requests) < $this->window_size)
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$this->window_size = sizeof($this->requests);
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// 如果任务数小于2个，不应该用这个方法的，用上面的single_curl方法就好了
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if ($this->window_size < 2)
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exit("Window size must be greater than 1");
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// 初始化任务队列
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$master = curl_multi_init();
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// 开始第一批请求
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for ($i = 0; $i < $this->window_size; $i++)
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{
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$ch = curl_init();
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$options = $this->get_options($this->requests[$i]);
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curl_setopt_array($ch, $options);
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curl_multi_add_handle($master, $ch);
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// 添加到请求数组
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$key = (string) $ch;
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$this->requestMap[$key] = $i;
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}
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do {
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while (($execrun = curl_multi_exec($master, $running)) == CURLM_CALL_MULTI_PERFORM) ;
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// 如果
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if ($execrun != CURLM_OK) { break; }
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// 一旦有一个请求完成，找出来，因为curl底层是select，所以最大受限于1024
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while ($done = curl_multi_info_read($master))
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{
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// 从请求中获取信息、内容、错误
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$info = curl_getinfo($done['handle']);
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$output = curl_multi_getcontent($done['handle']);
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$error = curl_error($done['handle']);
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// 如果绑定了回调函数
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$callback = $this->callback;
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if (is_callable($callback))
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{
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$key = (string) $done['handle'];
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$request = $this->requests[$this->requestMap[$key]];
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unset($this->requestMap[$key]);
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call_user_func($callback, $output, $info, $request, $error);
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}
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// 一个请求完了，就加一个进来，一直保证5个任务同时进行
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if ($i < sizeof($this->requests) && isset($this->requests[$i]) && $i < count($this->requests))
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{
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$ch = curl_init();
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$options = $this->get_options($this->requests[$i]);
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curl_setopt_array($ch, $options);
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curl_multi_add_handle($master, $ch);
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// 添加到请求数组
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$key = (string) $ch;
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$this->requestMap[$key] = $i;
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$i++;
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}
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// 把请求已经完成了得 curl handle 删除
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curl_multi_remove_handle($master, $done['handle']);
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}
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// 当没有数据的时候进行堵塞，把 CPU 使用权交出来，避免上面 do 死循环空跑数据导致 CPU 100%
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if ($running)
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{
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curl_multi_select($master, $this->timeout);
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}
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} while ($running);
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// 关闭任务
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curl_multi_close($master);
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// 把请求清空，否则没有重新 new rolling_curl(); 直接再次导入一批url的时候，就会把前面已经执行过的url又执行一轮
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unset($this->requests);
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return true;
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}
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/**
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* @return void
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*/
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public function __destruct()
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{
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unset($this->window_size, $this->callback, $this->options, $this->headers, $this->requests);
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}
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}
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