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downloader.py
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downloader.py
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import os
import hashlib
import requests
class Downloader(object):
def __init__(self, fileName, url):
self.__fileName = fileName
self.__fileName_download = self.__fileName + '.download'
self.__url = url
def __CalcFileSha256(self, filename):
with open(filename, "rb") as f:
sha256obj = hashlib.sha256()
sha256obj.update(f.read())
hash_value = sha256obj.hexdigest()
return hash_value
def Download(self):
def isConfigFile(filename):
filestats = os.stat(filename)
#print(f'File Size in Bytes is {filestats.st_size}')
if filestats.st_size < 1024 * 6:
return False
return True
isNeedUpdate = False
try:
if os.path.exists(self.__fileName_download):
os.remove(self.__fileName_download)
r = requests.get(self.__url)
with open(self.__fileName_download,'wb') as f:
f.write(r.content)
if not isConfigFile(self.__fileName_download):
return False
if os.path.exists(self.__fileName):
sha256Old = self.__CalcFileSha256(self.__fileName)
sha256New = self.__CalcFileSha256(self.__fileName_download)
if sha256New != sha256Old:
os.remove(self.__fileName)
os.rename(self.__fileName_download, self.__fileName)
isNeedUpdate = True
os.remove(self.__fileName_download)
else:
os.rename(self.__fileName_download, self.__fileName)
isNeedUpdate = True
except Exception as e:
print(f'%s download failed: %s' % (os.path.basename(self.__fileName), e))
finally:
return isNeedUpdate
if __name__ == '__main__':
pwd = os.getcwd()
file = pwd + '/rules/neodev_hosts.txt'
url = 'https://raw.githubusercontent.com/neodevpro/neodevhost/master/host'
downloader = Downloader(file, url)
if downloader.Download():
print('need update')