spider/lib/Doc.php

<?php
namespace Spider\Lib;
use Dever;

class Doc
{
	private $url;
	private $host;
	private $rule;
	public $type = 'dom';
	private $log = false;
	static protected $instance;

	static public function getInstance($url, $rule = '')
	{
		$key = $url . md5($rule);
		if (empty(self::$instance[$key])) {
			# 此处开协程：Dever::coroutine(self::$instance[$key]);
			self::$instance[$key] = new self($url, $rule);
		}

		return self::$instance[$key];
	}

	public function __construct($url, $rule = '')
	{
		$this->url($url);
		$this->rule = $rule;
		if (strpos($this->rule, '$json') !== false) {
			$this->type = 'json';
		} else {
			$this->type = 'dom';
		}
	}

	private function url($url)
	{
		$this->url = $url;
		$value = parse_url($this->url);
		$this->host = $value['scheme'] . '://' . $value['host'];
	}

	public function get()
	{
		$doc = $this->doc();
		if ($this->rule) {
			$doc = $this->find($doc, $this->rule);
		}
		return $doc;
	}

	public function doc($url = false)
	{
		$url = $url ? $url : $this->url;
		$html = $this->download($url);
		return ($this->getClass())::init($html);
	}


	private function download($url)
	{
		$this->addLog($url . '下载中...');
		$download = new Download($url);
		$this->addLog($url . '下载完成');
		return $download->get();
	}

	private function collect($data, $include, $exclude, $filter)
	{
		if ($include && !preg_match('/' . $include . '/i', $data)) {
			return 'error';
		}
		if ($exclude && preg_match('/' . $exclude . '/i', $data)) {
			return 'error';
		}
		if ($filter) {
			$filter = explode("\n", str_replace("\r", '', $filter));
			foreach ($filter as $k => $v) {
				$data = preg_replace('/' . $v . '/i', '', $data);
			}
		}
		
		return $data;
	}

	private function getClass()
	{
		return 'Spider\\Lib\\Doc\\' . ucfirst($this->type);
	}

	public function find($doc, $rule)
	{
		return ($this->getClass())::find($doc, $rule);
	}

	public function init($data)
	{
		if (is_string($data) && filter_var($data, FILTER_VALIDATE_URL) !== false) {
			$data = $this->doc($data);
		} else {
			$data = ($this->getClass())::init($data);
		}
		return $data;
	}

	public function rule($data, $col, $config)
	{

		$name = '字段[' . $config['name'] . '('.$config['key'].')]' . '"';
		$this->addLog($name . '正在按照规则['.$config['collect_rule'].']进行解析');

		$method = 'rule_' . $this->type;

		$data = ($this->getClass())::rule($this, $data, $col, $config['collect_rule'], $config['key']);

		$this->addLog($name . '解析完成');

		return $this->collect($data, $config['collect_include'], $config['collect_exclude'], $config['collect_filter']);
	}

	public function getUrl($data, $col, $config)
	{
		$url = $this->rule($data, $col, $config);
		if (strpos($url, 'http') === false) {
			if ($url[0] == '/') {
				$url = $this->host . $url;
			} else {
				$url = $this->url . $url;
			}
		}
		return $url;
	}


	public function addLog($string)
	{
		if ($this->log) {
			$this->log->add($string);
		}
	}

	public function saveLog()
	{
		if ($this->log) {
			$this->log->save();
		}
	}

	public function outLog()
	{
		if ($this->log) {
			$this->log->out();
		}
	}

	public function log(Log $log)
	{
		$this->log = $log;
	}
}