• Ajax爬取今日头条街拍美图


    1.打开今日头条:https://www.toutiao.com

    2.搜索街拍

    3.检查元素,查看请求发现在URL中每次只有offset发生改变,是一个get请求

     1 import requests
     2 from urllib.parse import urlencode
     3 import os
     4 from hashlib import md5
     5 from multiprocessing.pool import Pool
     6 
     7 def get_page(offset):
     8     params = {
     9         'offset': offset,
    10         'format': 'json',
    11         'keyword': '街拍',
    12         'autoload': 'true',
    13         'count': '20',
    14         'cur_tab': '1',
    15         'from': 'search_tab'
    16     }
    17     url = 'http://www.toutiao.com/search_content/?' + urlencode(params)
    18     try:
    19         response = requests.get(url)
    20         if response.status_code == 200:
    21             return response.json()
    22     except requests.ConnectionError:
    23         return None
    24 
    25 def get_images(json):
    26     if json.get('data'):
    27         data = json.get('data')
    28         for item in data:
    29             if item.get('cell_type') is not None:
    30                 continue
    31             title = item.get('title')
    32             images = item.get('image_list')
    33             for image in images:
    34                 yield{
    35                     'image': 'http:' + image.get('url'),
    36                     'title': title
    37                 }
    38 
    39 def save_image(item):
    40     image_path = 'img' + os.path.sep + item.get('title')
    41     if not os.path.exists(image_path):
    42         os.mkdir(image_path)
    43     try:
    44         response = requests.get(item.get('image'))
    45         if response.status_code == 200:
    46             file_path = image_path + os.path.sep + '{file_name}.{file_suffix}'.format(
    47                 file_name=md5(response.content).hexdigest(),
    48                 file_suffix='jpg'
    49             )
    50             if not os.path.exists(file_path):
    51                 with open(file_path, 'wb') as f:
    52                     f.write(response.content)
    53                     print('Downloaded image path is {0}'.format(file_path))
    54             else:
    55                 print('Already Downloads', file_path)
    56     except requests.ConnectionError:
    57         print('Failed to save image !!!')
    58 
    59 def main(offset):
    60     json = get_page(offset)
    61     for item in get_images(json):
    62         print(item)
    63         save_image(item)
    64 
    65 GROUP_START = 0
    66 GROUP_END = 9
    67 
    68 if __name__ == '__main__':
    69     pool = Pool()
    70     groups = ([x * 20 for x in range(GROUP_START, GROUP_END+1)])
    71     pool.map(main, groups)
    72     pool.close()
    73     pool.join()

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  • 原文地址:https://www.cnblogs.com/chengchengaqin/p/9792420.html
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