import requests

from multiprocessing import Pool

from requests.exceptions import RequestException

import re

import  json

def get_one_page(url):

    try:

        if url=='':

            return None

        response=requests.get(url)

        if response.status_code==200:

            return response.text

        return None

    except RequestException:

        return None

def parse_one_page(html):

    if html=='':

        return None

    pattern=re.compile('<dd>.*?board-index.*?>(\d+)</i>.*?data-src="(.*?)".*?name"><a'

                       +'.*?>(.*?)</a>.*?star">(.*?)</p>.*?releasetime">(.*?)</p>'

                       +'.*?integer">(.*?)</i>.*?fraction">(.*?)</i>.*?</dd>',re.S)

    items=re.findall(pattern,html)

    for item in items:

        yield {

            'index':item[0],

            'image':item[1],

            'title':item[2],

            'actor':item[3].strip()[3:],

            'time':item[4].strip()[5:],

            'score':item[5]+item[6]

        }

def write_to_file(content):

    with open('result.txt','a',encoding='utf-8') as f:#a往后追加

        f.write(json.dumps(content,ensure_ascii=False)+'\n')

        f.close()

def main(offset):

    url='http://maoyan.com/board/4?offset='+str(offset)

    html=get_one_page(url)  # 得到html

    for item in  parse_one_page(html):

       print(item)

       write_to_file(item)

if __name__=='__main__':

    # for i in range(10):

    #     main(i*10)

    pool=Pool() #多线程

    pool.map(main,[i*10 for i in range(10)])