Python 如果超过1天,则基于上次修改日期下载文件失败
下面是一段代码片段,它根据服务器和本地服务器之间上次修改的日期下载一个文件Python 如果超过1天,则基于上次修改日期下载文件失败,python,datetime,time,python-requests,Python,Datetime,Time,Python Requests,下面是一段代码片段,它根据服务器和本地服务器之间上次修改的日期下载一个文件 try: url = "https://10.10.10.10/version.ini" local_ini = ".//config/version.ini" filetime = (time.strftime('%a, %d %b %Y %X GMT', time.gmtime(os.path.getmtime(local_ini)))) print("File Last Modifi
try:
url = "https://10.10.10.10/version.ini"
local_ini = ".//config/version.ini"
filetime = (time.strftime('%a, %d %b %Y %X GMT', time.gmtime(os.path.getmtime(local_ini))))
print("File Last Modified: {0}".format(filetime))
r = requests.get(url,stream=True)
meta = r.headers['last-modified']
logging.info("Web Last Modified: {0}".format(meta))
if filetime < meta:
print("Newer file found! Downloading...")
if r != False:
try:
fileName = os.path.basename(urlparse.urlsplit(r.url)[2])
with open(".//config/version.ini"e, 'wb') as f:
shutil.copyfileobj(r.raw,f)
finally:
r.close()
else:
logging.info('No new version found. You got the latest file!')
except requests.exceptions.RequestException as e:
logging.info(e)
但是当我修改一个文件时,一天后我得到了错误的结果:
File Last Modified: Wed, 11 Jan 2017 08:38:38 GMT
Web Last Modified: Thu, 12 Jan 2017 02:44:45 GMT
No new version found. You got the latest file!
为什么时间戳比较给出了错误的结果?在您的示例中,meta是一个字符串,而不是
time
对象。如果比较两个datetime
对象,您的运气会更好:
if (dt.datetime.strptime(filetime, '%a, %d %b %Y %X GMT') <
dt.datetime.strptime(meta, '%a, %d %b %Y %X GMT')):
我得到了TypeError:参数必须是9项序列,而不是strI误读了您的代码,我编辑了示例以使用datetime对象。
if (dt.datetime.strptime(filetime, '%a, %d %b %Y %X GMT') <
dt.datetime.strptime(meta, '%a, %d %b %Y %X GMT')):
import datetime as dt