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@xl7dev xl7dev/request_c.py

Last active Oct 16, 2018
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python request文件下载续传
#!/usr/bin/env python
# encoding: utf-8
"""
@author: xl7dev
"""
import sys
import os
import cgi
import re
import datetime
import requests
class DOWNLOAD():
def getOffset(self, local_path):
"""
获取已下载文件大小
:param local_path:
:return:
"""
if os.path.exists(local_path):
return os.path.getsize(local_path)
else:
return 0
def dl(self, url):
"""
下载文件
:param url:
:return:
"""
# 获取文件属性
r = requests.head(url)
start_time = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
filesize = int(r.headers['Content-Length']) # 获取下载文件大小
if 'Content-disposition' in r.headers:
value, params = cgi.parse_header(r.headers['Content-disposition'])
filename = params['filename'] # 获取下载文件名
else:
filename = url.split('/')[-1]
# 检查断点续传
start = self.getOffset(filename)
if start != filesize:
end = int(filesize) - 1
range = "bytes={0}-{1}".format(start, end)
headers = {"Range": range}
# 开始下载
r = requests.get(url, stream=True, headers=headers, verify=False)
with open(filename, 'ab+') as f:
for chunk in r.iter_content(chunk_size=1024):
if chunk:
print(chunk)
f.write(chunk)
end_time = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
item = {"filename": filename, "filesize": filesize, "start_time": start_time,
"end_time": end_time, "url":url}
print(item)
return item
else:
print("Download file {0} completed!".format(filename))
if __name__ == "__main__":
url = sys.argv[1]
demo = DOWNLOAD()
demo.dl(url)
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