使用请求通过 http 下载文件时的进度条 [英] Progress Bar while download file over http with Requests

问题描述

我需要下载一个相当大(~200MB)的文件.我想出了如何使用 here 下载和保存文件.最好有一个进度条来知道下载了多少.我找到了 ProgressBar 但我不确定如何将两者结合在一起.

I need to download a sizable (~200MB) file. I figured out how to download and save the file with here. It would be nice to have a progress bar to know how much has been downloaded. I found ProgressBar but I'm not sure how to incorperate the two together.

这是我试过的代码，但没有用.

Here's the code I tried, but it didn't work.

bar = progressbar.ProgressBar(max_value=progressbar.UnknownLength)
with closing(download_file()) as r:
    for i in range(20):
        bar.update(i)

推荐答案

我建议你试试 tqdm，非常好用.使用 requests 库下载的示例代码:

I suggest you try tqdm, it's very easy to use. Example code for downloading with requests library:

from tqdm import tqdm
import requests

url = "http://www.ovh.net/files/10Mb.dat" #big file test
# Streaming, so we can iterate over the response.
response = requests.get(url, stream=True)
total_size_in_bytes= int(response.headers.get('content-length', 0))
block_size = 1024 #1 Kibibyte
progress_bar = tqdm(total=total_size_in_bytes, unit='iB', unit_scale=True)
with open('test.dat', 'wb') as file:
    for data in response.iter_content(block_size):
        progress_bar.update(len(data))
        file.write(data)
progress_bar.close()
if total_size_in_bytes != 0 and progress_bar.n != total_size_in_bytes:
    print("ERROR, something went wrong")

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