2019-03-15 使用Request POST获取中加基金的PDF文件，并下载到本地

import requests
import time
base_url='http://www.bobbns.com/common-web/cms/content!getContentsIncludeSubCategoryOrderByHitCountDesc?noCache=1552542874867'
# User-Agent 是必须的，其它的尽量多写点
headers={
    'Host':'www.bobbns.com',
    'Referer':'http://www.bobbns.com/byfy/zhuanxiang/index.html',
    'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.98 Safari/537.36 LBBROWSER',
    'X-Requested-With':'XMLHttpRequest'
}

def get_page(pageNumber):
# 分页变量 pageNumber
    data={
      'siteId':'f44c6a2aee134f608a82af7561debf57',
      'categoryId':'7f6b707209f5482984438df86ec64ecd',
      'pageNumber':pageNumber,
      'pageSize':'10'
    }
    try:
        response=requests.post(url=base_url,data=data,headers=headers)
        # print(response.json()['contents'])
        if response.status_code==200:
            return response.json()
    except Exception as e:
        print(e)

def parse_page(json):
    if json:
        items=json.get('contents')
        for item  in  items:
            results={}
            results['title']=item.get('title')
            results['url']='http://www.bobbns.com'+item.get('url')

            yield results

if __name__ == '__main__':
    for pageNumber in range(1,9):
        json=get_page(pageNumber)
        results=parse_page(json)
        for result in results:
            rep=requests.get(result['url'],headers)
            time.sleep(6)
            with open(r'./PDF/{}.pdf'.format(result['title']),'wb') as f:
                f.write(rep.content)
            # print(result)