Python抓取今日頭條街拍圖片數(shù)據(jù)
(1)抓取今日頭條街拍圖片
(2)分析今日頭條街拍圖片結(jié)構(gòu)
keyword: 街拍 pd: atlas dvpf: pc aid: 4916 page_num: 1 search_json: {"from_search_id":"20220104115420010212192151532E8188","origin_keyword":"街拍","image_keyword":"街拍"} rawJSON: 1 search_id: 202201041159040101501341671A4749C4
可以找到規(guī)律,page_num從1開(kāi)始累加,其他參數(shù)不變
(3)按功能不同編寫(xiě)不同方法組織代碼
獲取網(wǎng)頁(yè)json格式數(shù)據(jù)
def get_page(page_num): global headers headers = { 'Host': 'so.toutiao.com', #'Referer': 'https://so.toutiao.com/search?keyword=%E8%A1%97%E6%8B%8D&pd=atlas&dvpf=pc&aid=4916&page_num=0&search_json={%22from_search_id%22:%22202112272022060101510440283EE83D67%22,%22origin_keyword%22:%22%E8%A1%97%E6%8B%8D%22,%22image_keyword%22:%22%E8%A1%97%E6%8B%8D%22}', 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36', 'X-Requested-With': 'XMLHttpRequest', 'Cookie': 'msToken=S0DFBkZ9hmyLOGYd3_QjhhXgrm38qTyOITnkNb0t_oavfbVxuYV1JZ0tT5hLgswSfmZLFD6c2lONm_5TomUQXVXjen7CIxM2AGwbhHRYKjhg; _S_DPR=1.5; _S_IPAD=0; MONITOR_WEB_ID=7046351002275317255; ttwid=1%7C0YdWalNdIiSpIk3CvvHwV25U8drq3QAj08E8QOApXhs%7C1640607595%7C720e971d353416921df127996ed708931b4ae28a0a8691a5466347697e581ce8; _S_WIN_WH=262_623' } params = { 'keyword': '街拍', 'pd': 'atlas', 'dvpf': 'pc', 'aid': '4916', 'page_num': page_num, 'search_json': '%7B%22from_search_id%22%3A%22202112272022060101510440283EE83D67%22%2C%22origin_keyword%22%3A%22%E8%A1%97%E6%8B%8D%22%2C%22image_keyword%22%3A%22%E8%A1%97%E6%8B%8D%22%7D', 'rawJSON': 1, 'search_id': '2021122721183101015104402851E3883D' } url = 'https://so.toutiao.com/search?' + urlencode(params) print(url) try: response=requests.get(url,headers=headers,params=params) if response.status_code == 200: #if response.content: #print(response.json()) return response.json() except requests.ConnectionError: return None
從json格式數(shù)據(jù)提取街拍圖片
def get_images(json): images = json.get('rawData').get('data') for image in images: link = image.get('img_url') yield link
將街拍圖片以其md5碼命名并保存圖片
實(shí)現(xiàn)一個(gè)保存圖片的方法 save_image(),其中 item 就是前面 get_images() 方法返回的一個(gè)字典。在該方法中,首先根據(jù) item 的 title 來(lái)創(chuàng)建文件夾,然后請(qǐng)求這個(gè)圖片鏈接,獲取圖片的二進(jìn)制數(shù)據(jù),以二進(jìn)制的形式寫(xiě)入文件。圖片的名稱可以使用其內(nèi)容的 MD5 值,這樣可以去除重復(fù)。相關(guān)代碼如下:
def save_image(link): data = requests.get(link).content with open(f'./image/{md5(data).hexdigest()}.jpg', 'wb')as f:#使用data的md5碼作為圖片名 f.write(data)
main()調(diào)用其他函數(shù)
def main(page_num): json = get_page(page_num) for link in get_images(json): #print(link) save_image(link)
(4)抓取20page今日頭條街拍圖片數(shù)據(jù)
這里定義了分頁(yè)的起始頁(yè)數(shù)和終止頁(yè)數(shù),分別為 GROUP_START 和 GROUP_END,還利用了多線程的線程池,調(diào)用其 map() 方法實(shí)現(xiàn)多線程下載。
if __name__ == '__main__': GROUP_START = 1 GROUP_END = 20 pool = Pool() groups = ([x for x in range(GROUP_START, GROUP_END + 1)]) #print(groups) pool.map(main, groups) pool.close() pool.join()
import requests from urllib.parse import urlencode from hashlib import md5 from multiprocessing.pool import Pool def get_page(page_num): global headers headers = { 'Host': 'so.toutiao.com', #'Referer': 'https://so.toutiao.com/search?keyword=%E8%A1%97%E6%8B%8D&pd=atlas&dvpf=pc&aid=4916&page_num=0&search_json={%22from_search_id%22:%22202112272022060101510440283EE83D67%22,%22origin_keyword%22:%22%E8%A1%97%E6%8B%8D%22,%22image_keyword%22:%22%E8%A1%97%E6%8B%8D%22}', 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36', 'X-Requested-With': 'XMLHttpRequest', 'Cookie': 'msToken=S0DFBkZ9hmyLOGYd3_QjhhXgrm38qTyOITnkNb0t_oavfbVxuYV1JZ0tT5hLgswSfmZLFD6c2lONm_5TomUQXVXjen7CIxM2AGwbhHRYKjhg; _S_DPR=1.5; _S_IPAD=0; MONITOR_WEB_ID=7046351002275317255; ttwid=1%7C0YdWalNdIiSpIk3CvvHwV25U8drq3QAj08E8QOApXhs%7C1640607595%7C720e971d353416921df127996ed708931b4ae28a0a8691a5466347697e581ce8; _S_WIN_WH=262_623' } params = { 'keyword': '街拍', 'pd': 'atlas', 'dvpf': 'pc', 'aid': '4916', 'page_num': page_num, 'search_json': '%7B%22from_search_id%22%3A%22202112272022060101510440283EE83D67%22%2C%22origin_keyword%22%3A%22%E8%A1%97%E6%8B%8D%22%2C%22image_keyword%22%3A%22%E8%A1%97%E6%8B%8D%22%7D', 'rawJSON': 1, 'search_id': '2021122721183101015104402851E3883D' } url = 'https://so.toutiao.com/search?' + urlencode(params) print(url) try: response=requests.get(url,headers=headers,params=params) if response.status_code == 200: #if response.content: #print(response.json()) return response.json() except requests.ConnectionError: return None def get_images(json): images = json.get('rawData').get('data') for image in images: link = image.get('img_url') yield link def save_image(link): data = requests.get(link).content with open(f'./image/{md5(data).hexdigest()}.jpg', 'wb')as f:#使用data的md5碼作為圖片名 f.write(data)def main(page_num): json = get_page(page_num) for link in get_images(json): #print(link) save_image(link)if __name__ == '__main__': GROUP_START = 1 GROUP_END = 20 pool = Pool() groups = ([x for x in range(GROUP_START, GROUP_END + 1)]) #print(groups) pool.map(main, groups) pool.close() pool.join()
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