Urllib urlretrieve seems to ignore provided host header

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1

Hello.

I am working on a download function that can download from an address with only the IP address provided by a different DNS server. However for some reason unlike the requests library the urlretrieve function seems to ignore when a host is passed to its header.

Below I provide two versions of the same downloader, one using requests (which works but cannot be used due to upstream issues and another which uses urlretrieve which has the issue of seemingly ignoring the provided host parameter.

def download_helper(url, fname):
            opener = urllib.request.build_opener()
            opener.addheaders = [('User-agent', 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:103.0) Gecko/20100101 Firefox/103.0'),
                                ('Referer', "https://www.amd.com/en/support/graphics/amd-radeon-6000-series/amd-radeon-6700-series/amd-radeon-rx-6700-xt"),
                                ('Host' , 'us.download.nvidia.com')]
            urllib.request.install_opener(opener)
            import ssl
            ssl._create_default_https_context = ssl._create_unverified_context
            urllib.request.urlretrieve(url, filename=fname)

def download_helper2(url, fname):
    my_referer = "https://www.amd.com/en/support/graphics/amd-radeon-6000-series/amd-radeon-6700-series/amd-radeon-rx-6700-xt"
    resp = requests.get(url, verify=False, stream=True, headers={
        'referer': my_referer,
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:93.0) Gecko/20100101 Firefox/93.0',
        'Host' : 'us.download.nvidia.com'
        })
    total = int(resp.headers.get('content-length', 0))
    with open(fname, 'wb') as file:
        for data in resp.iter_content(chunk_size=1024):
            size = file.write(data)




download_helper2('https://192.229.211.70/Windows/516.94/516.94-desktop-win10-win11-64bit-international-dch-whql.exe', r'516.94-desktop-win10-win11-64bit-international-dch-whql.exe')

Any help is greatly appreciated, thanks