python的requests模块进行下载限速

  • 2019 年 12 月 24 日
  • 筆記

python的requests模块进行下载带宽限制,进行现在速度限制,避免拉爆服务器。开启requests的stream=True就可以进行渐进式下载,然后再适当的sleep一下。就可以减少下载带宽,限制下载速度了。

            # NOTE the stream=True parameter below              recvlen = 0              tickss = time.time()              with requests.get(mp3url, stream=True) as r:                  r.raise_for_status()                  with open(mp3f, 'wb') as f:                      for chunk in r.iter_content(chunk_size=30720):                          if chunk: # filter out keep-alive new chunks                              f.write(chunk)                              recvlen = recvlen + len(chunk)                              time.sleep(0.1)                              # f.flush()                  tickse = time.time()              #f=requests.get(mp3url)              #with open(mp3f,"wb") as code:              #    code.write(f.content)              print("------------------------")              print(title)              print(mp3f)              print(mp3url)              print("长度:",recvlen)              print("耗时:",tickse-tickss,"秒")              print("++++++++++++++++++++++++")              time.sleep(3)

限速结果日志如下:

长度: 2950970  耗时: 9.922253608703613 秒    长度: 3413255  耗时: 11.447856426239014 秒    长度: 3465066  耗时: 11.52188777923584 秒    长度: 5089296  耗时: 16.877254486083984 秒    长度: 2969808  耗时: 9.891138792037964 秒    长度: 5777092  耗时: 19.198574781417847 秒    长度: 6185409  耗时: 20.51071047782898 秒
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