【环境】
- OS：Windows 10 x64
- Python：3.6.5 x64
- requests：2.18.4
【代码】
代码语言：javascript复制# encoding: utf-8
# author: walker
# date: 2018-06-11
# summary: 使用 requests 下载大文件
import time
import requests
# 下载一个大文件
def DownOneFile(srcUrl, localFile):
print('%sn --->>>n %s' % (srcUrl, localFile))
startTime = time.time()
with requests.get(srcUrl, stream=True) as r:
contentLength = int(r.headers['content-length'])
line = 'content-length: �/ %.2fKB/ %.2fMB'
line = line % (contentLength, contentLength/1024, contentLength/1024/1024)
print(line)
downSize = 0
with open(localFile, 'wb') as f:
for chunk in r.iter_content(8192):
if chunk:
f.write(chunk)
downSize = len(chunk)
line = '%d KB/s - %.2f MB， 共 %.2f MB'
line = line % (downSize/1024/(time.time()-startTime), downSize/1024/1024, contentLength/1024/1024)
print(line, end='r')
if downSize >= contentLength:
break
timeCost = time.time() - startTime
line = '共耗时: %.2f s, 平均速度: %.2f KB/s'
line = line % (timeCost, downSize/1024/timeCost)
print(line)
if __name__ == '__main__':
srcUrl = r'http://cachefly.cachefly.net/100mb.test'
localFile = r'D:Python3Projecttestoutout.test'
DownOneFile(srcUrl, localFile)【效果图】
