发布时间:2019-09-26 07:32:38编辑:auto阅读(1554)
【环境】
OS:Windows 10 x64
Python:3.6.5 x64
requests:2.18.4
【代码】
# 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('%s\n --->>>\n %s' % (srcUrl, localFile)) startTime = time.time() with requests.get(srcUrl, stream=True) as r: contentLength = int(r.headers['content-length']) line = 'content-length: %dB/ %.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:\Python3Project\test\out\out.test' DownOneFile(srcUrl, localFile)
【效果图】
【相关阅读】
requests 官方文档:http://docs.python-requests.org
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