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python 文件更新检测

python 文件更新检测

测试在线网站的 last-modified ….

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import requests
import datetime
from dateutil.parser import parse as parsedate
r = requests.head(url)
url_time = r.headers['last-modified']
url_date = parsedate(url_time)
file_time = datetime.datetime.fromtimestamp(os.path.getmtime(dstFile))
if url_date > file_time :
print(donwload it !)

更多参考:https://stackoverflow.com/questions/29314287/python-requests-download-only-if-newer

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