spider/lib/Api.php

<?php
namespace Spider\Lib;
use Dever;

class Api
{
	private $queue;
	public function add_api($id)
	{
		# 写入队列
		if (is_array($id)) {
			$config = $id;
		} else {
			$config = Dever::load('spider/lib/project')->get($id);
		}
		
		if (!$config) {
			Dever::alert('项目不存在');
		}
		if ($config['status'] <= 2) {
			Dever::load('spider/lib/project')->set($config, 3);
			Dever::load('spider/lib/queue')->push($config['id']);
		}
		return 'reload';
	}

	public function test_api($id)
	{
		Dever::setInput('test', 1);
		$this->run($id);
		return 'reload';
	}

	# 守护进程 每分钟执行一次即可
	public function daemon()
	{
		# 查看进程是否存在
		$state = Dever::process('lib/api.cron', true);
		if ($state <= 0) {
			Dever::daemon('lib/api.cron', 'spider');
		}

		# 查看当前所有项目是否可以开始运行
		$data = Dever::load('spider/lib/project')->getAll();
		if ($data) {
			foreach ($data as $k => $v) {
				$this->add_api($v);
			}
		}
	}

	public function cron()
	{
		$this->queue = new Queue();
		//Dever::import('task');
		while (1) {
			$this->load();
		}
	}

	public function load()
	{
		try {
			$id = $this->queue->pop();
			if ($id) {
				$config = Dever::load('spider/lib/project')->get($id);
				if ($config) {
					# 推到后台运行
					# 获取当前执行的进程数量
		            $num = Dever::process('lib/api.run', true);
		            if ($num >= 1000) {
		                # 等会儿再执行
		                sleep(60);
		            }
		            Dever::daemon('lib/api.run?id=' . $id, 'spider');
				}
			}
			return true;
		} catch (\Exception $e) {
            return true;
        }
	}

	public function run()
	{
		$id = Dever::input('id');
		if (!$id) {
			return false;
		}
		$config = Dever::load('spider/lib/project')->get($id);
		if (!$config) {
			return false;
		}
		$col = $this->col($config['id']);
		$set = $this->set($config['id']);

		if (strpos($config['site'], '{') !== false && strpos($config['site'], '}') !== false) {
			$this->preg($config, $col, $set);
		} else {
			Dever::load('spider/lib/project')->set($config, 4, 1);
			$this->parse($config['site'], $config['id'], $config['collect_rule'], $col, $set, $config['push']);
		}
		/*
		Dever::task(function() use($config, $this)
		{
			$col = $this->col($config['id']);
			$this->parse($config['url'], $config['id'], $config['collect_rule'], $col);
		});
		*/
		Dever::load('spider/lib/project')->set($config, 2);
	}

	private function col($project)
	{
		return Dever::db('spider/col')->getList(['where_pid' => $project]);
	}

	private function set($project)
	{
		return Dever::db('spider/set')->getList(['where_pid' => $project]);
	}

	private function parse($url, $project, $rule, $col, $set, $push)
	{
		$parse = new Parse($url, $project, $rule, $col, $set, $push);
		return $parse->get();
	}

	private function preg($config, $col, $set)
	{
		$pat = '/{(.*?)}/i';
		preg_match_all($pat, $config['site'], $match);
		if (isset($match[1][0]) && $match[1][0]) {
			if ($config['page_num'] <= 0) $config['page_num'] = 100;
			parse_str($match[1][0], $param);
			$this->page($param, $match[0][0], $config, $col, $set);
		}
	}

	private function page($param, $replace, $config, $col, $set)
	{
		if (isset($param['page']) && $param['page']) {
			for ($i = $param['page']; $i <= $config['page_num']; $i++) {
				$url = str_replace($replace, $i, $config['site']);
				Dever::load('spider/lib/project')->set($config, 4, $i);
				$this->parse($url, $config['id'], $config['collect_rule'], $col, $set, $config['push']);
			}
		} else {
			Dever::load('spider/lib/project')->set($config, 4, 1);
			$this->parse(str_replace($replace, '', $value), $config['id'], $config['collect_rule'], $col, $set, $config['push']);
		}
	}
}