#coding:utf-8

import url_manager,html_downloader,html_parser,html_outputer
import urllib.error

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):
        self.urls.add_new_url(root_url)
        count = 1
        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.download(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 == 10:
                    break
                count += 1
            except urllib.error.URLError as error:
                print ('craw failed:%s'%error)
        self.outputer.output_html()

if __name__ == "__main__":
    root_url = "https://baike.baidu.com/item/Python/407313"
    # root_url = "https://www.zhihu.com/question/22918070"
    obj_spider = SpiderMain()
    obj_spider.craw(root_url)