如何从重定向的URL下载文件？

Question

我需要使用url下载文件-> https://readthedocs.org/projects/django/downloads/pdf/latest/

该URL重定向到带有.pdf文件的URL。

如何使用python使用该网址下载该文件？

我试过了 ：-

import urllib
def download_file(download_url):
    web_file = urllib.urlopen(download_url)
    local_file = open('some_file.pdf', 'w')
    local_file.write(web_file.read())
    web_file.close()
    local_file.close()

if __name__ == 'main':
    download_file('https://readthedocs.org/projects/django/downloads/pdf/latest/')

但这不起作用

Answer 1

import requests
url = 'https://readthedocs.org/projects/django/downloads/pdf/latest/'
r = requests.get(url, allow_redirects=True)  # to get content after redirection
pdf_url = r.url # 'https://media.readthedocs.org/pdf/django/latest/django.pdf'
with open('file_name.pdf', 'wb') as f:
    f.write(r.content)

如果要从其他方法下载文件，或者只想获取最终重定向的URL，则可以requests.head()如下所示使用：

r = requests.head(url, allow_redirects=True)  # to get only final redirect url