Python實現微博動態圖片爬取詳解
由於微博的網頁端有反爬蟲,需要登錄,所以我們換個思路,曲線救國。
我們找到微博在瀏覽器上面用於手機端的調試的APL,如何找到呢?
我這邊直接附上微博的手機端的地址:https://m.weibo.cn/
1.模擬搜索用戶
搜索一個用戶獲取到的api:
https://m.weibo.cn/api/container/getIndex?containerid=100103type=1&q=半半子&page_type=searchall
1.1 對api內參數進行處理
containerid=100103type=1&q=半半子 ——> containerid=100103type%3D1%26q%3D%E5%8D%8A%E5%8D%8A%E5%AD%90_
這個參數需要提前轉碼,否則無法獲取數據
1.2 對用戶名進行判斷,通過後提取uid
2.獲取more參數
GET
api : https://m.weibo.cn/profile/info?uid=2830125342
2.1 提取並處理more參數
3.循環提取圖片id
GET
api : https://m.weibo.cn/api/container/getIndex?containerid=2304132830125342_-_WEIBO_SECOND_PROFILE_WEIBO&page_type=03&page=1
3.1 提取圖片id——>pic_id
3.2 獲取發送圖片用戶
3.3 根據動態創建時間生成用戶唯一識別碼
4.下載圖片
我們從瀏覽器抓包中就會獲取到後臺服務器發給瀏覽器的圖片鏈接
https://wx2.sinaimg.cn/large/pic_id.jpg
瀏覽器打開這個鏈接就可以直接下載圖片
爬取完整代碼:
import os import sys import time from urllib.parse import quote import requests headers = { 'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36' } def time_to_str(c_at): ti = time.strptime(c_at, '%a %b %d %H:%M:%S +0800 %Y') time_str = time.strftime('%Y%m%d%H%M%S', ti) return time_str # 1. 搜索用戶,獲取uid # 2. 通過uid獲取空間動態關鍵參數 # 3. 獲取動態內容 # 4. 提取圖片參數 # 5. 下載圖片 # 1. 搜索用戶,獲取uid # ========= 用戶名 ========= # 輸入不同的用戶名可切換下載的用戶圖片 # 用戶名需要完全匹配 name = '半半子_' # ========================= con_id = f'100103type=1&q={name}' # 這個條件需要轉碼 con_id = quote(con_id, 'utf-8') user_url = f'https://m.weibo.cn/api/container/getIndex?containerid={con_id}&page_type=searchall' user_json = requests.get(url=user_url, headers=headers).json() user_cards = user_json['data']['cards'] for card_num in range(len(user_cards)): if 'mblog' in user_cards[card_num]: if user_cards[card_num]['mblog']['user']['screen_name'] == name: print(f'正在獲取{name}的空間') # 2. 通過uid獲取空間動態關鍵參數 user_id = user_cards[card_num]['mblog']['user']['id'] info_url = f'https://m.weibo.cn/profile/info?uid={user_id}' info_json = requests.get(url=info_url, headers=headers).json() more_card = info_json['data']['more'].split("/")[-1] break file_name = 'weibo' if not os.path.exists(file_name): os.mkdir(file_name) if len(more_card) == 0: sys.exit() page_type = '03' page = 0 while True: # 3. 獲取動態內容 page += 1 url = f'https://m.weibo.cn/api/container/getIndex?containerid={more_card}&page_type={page_type}&page={page}' param = requests.get(url=url, headers=headers).json() cards = param['data']['cards'] print(f'第 {page} 頁') for i in range(len(cards)): card = cards[i] if card['card_type'] != 9: continue mb_log = card['mblog'] # 4. 提取圖片參數 # 獲取本人的圖片 pic_ids = mb_log['pic_ids'] user_name = mb_log['user']['screen_name'] created_at = mb_log['created_at'] if len(pic_ids) == 0: # 獲取轉發的圖片 if 'retweeted_status' not in mb_log: continue if 'pic_ids' not in mb_log['retweeted_status']: continue pic_ids = mb_log['retweeted_status']['pic_ids'] user_name = mb_log['retweeted_status']['user']['screen_name'] created_at = mb_log['retweeted_status']['created_at'] time_name = time_to_str(created_at) pic_num = 1 print(f'======== {user_name} ========') # 5. 下載圖片 for pic_id in pic_ids: pic_url = f'https://wx2.sinaimg.cn/large/{pic_id}.jpg' pic_data = requests.get(pic_url, headers) # 文件名 用戶名_日期(年月日時分秒)_編號.jpg # 例:半半子__20220212120146_1.jpg with open(f'{file_name}/{user_name}_{time_name}_{pic_num}.jpg', mode='wb') as f: f.write(pic_data.content) print(f' 正在下載:{pic_id}.jpg') pic_num += 1 time.sleep(2)
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