首先，播放影片并打开Chrome开发者工具,选择Network。逐步拖动进度条并观察本地与服务器的请求规律，如图： 
然后，确定弹幕数据来自JS实时加载而非XHR。需要注意的是，弹幕的请求数据不是规范的JSON格式。如图：
from fake_useragent import UserAgent
from requests.exceptions import RequestException
from tqdm import tqdm
import requests
import time
import os
import re
'''
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'''
def get_data(mat):
"""
循环遍历爬取弹幕数据
:param mat: 偏移量
:return: list
"""
# 请求链接
url = 'https://service.danmu.youku.com/list?jsoncallback=jQuery111207035726936412456_1552483671572&mat={}&mcount=1&ct=1001&iid=959955945&aid=333822&cid=96&lid=0&ouid=0'.format(mat)
# headers
headers = {
'Referer': 'https://v.youku.com/v_show/id_XMzgzOTgyMzc4MA==.html?spm=a2h0k.11417342.soresults.dplaybutton&s=c6c62a475a5d4a14ab48',
'User-Agent': UserAgent().random
}
"""
# 参数
params = {
'jsoncallback': 'jQuery11120003560802190473389_1552479833762',
'mat': mat,
'mcount': '1',
'ct': '1001',
'id': '959955945',
'aid': '333822',
'cid': '96',
'lid': '0',
'ouid': '0'
# '_': '1552479833815' 提示：类似时间戳,去掉后不影响数据的获取
}
"""
# 获取弹幕
try:
response = requests.get(url, headers=headers)
print(response)
if response.status_code == 200:
html = response.text
# 正则解析（结果为list类型）
results = re.findall(',\"content\":\"(.*?)\",', html, re.S)
# 文本存储
save_dir = './utils/danmu.txt'
if not os.path.exists(save_dir): # Determine whether storage path exists, no creation
os.mkdir(save_dir)
with open(save_dir, 'a', encoding='utf-8') as f:
f.write(str(results))
return results
return None
except RequestException as e:
print('Error: ', e.args)
return None
if __name__ == '__main__':
for i in tqdm(range(10), desc='Progress'):
time.sleep(1)
get_data(str(i))