#coding=utf-8
#爬虫总调度程序

from baike_spider import url_manager, html_downloader, html_parser,\
    html_outputer


class SpiderMain(object):
    def __init__(self):
        self.urls=url_manager.UrlManager()
        self.downloader = html_downloader.HtmlDownloader()
        self.parser = html_parser.HtmlParser()
        self.outputer = html_outputer.HtmlOutputer()
        
    
    def craw(self, root_url):
        count = 1
        self.urls.add_new_url(root_url)
        while self.urls.has_new_url():
            try:
                new_url = self.urls.get_new_url()
                print "craw %d :%s"%(count,new_url)
                html_cont = self.downloader.dowload(new_url)
                new_urls,new_data = self.parser.parse(new_url,html_cont)
                self.urls.add_new_urls(new_urls)
                self.outputer.collect_data(new_data)
            
                if count == 30:
                    break
                
                count = count +1
            except:
                print 'craw failed'
            
        self.outputer.output_html()    
    
    
if __name__ == "__main__":
    root_url = "http://baike.baidu.com/view/21087.htm" #设置爬取的入口URL
    obj_spider = SpiderMain()
    obj_spider.craw(root_url)  #调用爬虫的craw来启动爬虫