# __author:   han-zhang
# date:  2019/8/15 17:15
from bs4 import BeautifulSoup
import urllib.request, time


def get_request(url):
    headers = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36'
                      ' (KHTML, like Gecko) Chrome/75.0.3770.142 Safari/537.36'
    }
    request = urllib.request.Request(url=url, headers=headers)
    return request


def get_content(request):
    response = urllib.request.urlopen(request)
    content = response.read().decode('gbk')
    return content


def parse_content(content):
    # 生成soup对象
    soup = BeautifulSoup(content, 'lxml')
    bdiv = soup.find('div', class_='dw_table')
    # print(bdiv)
    get_text(bdiv)


def get_text(bdiv):
    bb_list = bdiv.find_all('div', class_='el')
    # print(bb_list)
    # print(len(bb_list))

    bb_list.remove(bb_list[0])
    fp = open('51job.txt', 'a', encoding='utf8')
    count = 0
    for bb in bb_list:
        count += 1
        print('正在下载第%s条' % count)
        all_span = bb.find_all('span')
        # print(all_span)
        # 职位名称
        job_name1 = all_span[0]
        job_name = job_name1.text.replace('\n', '').lstrip().rstrip()
        # print(job_name)
        # 公司名称
        bname1 = all_span[1]
        bname = bname1.text

        # 工作地点
        job_where1 = all_span[-3]
        job_where = job_where1.string
        # 薪资
        salary1 = all_span[-2]
        salary = salary1.string
        # 发布日期
        time1 = all_span[-1]
        times = time1.string

        fp.write(
            str(job_name) + '\t' + str(bname) + '\t' + str(job_where) + '\t' + str(salary) + '\t' + str(times) + '\n')
        print('结束下载第%s条' % count)
        time.sleep(2)
    fp.close()


def main():
    page = int(input('请输入你要取爬的页数：'))
    for p in range(1, page + 1):
        url = 'https://search.51job.com/list/090200,000000,0000,00,9,99,python,2,' + str(p) + '.html?'

        # 构建请求对象
        request = get_request(url)
        # 得到响应
        content = get_content(
            request)
        # 通过bs4解析网页
        parse_content(content)


if __name__ == '__main__':
    main()