client.py 文件源码

def downloadPage(url, file, contextFactory=None, *args, **kwargs):
    """Download a web page to a file.

    @param file: path to file on filesystem, or file-like object.

    See HTTPDownloader to see what extra args can be passed.
    """
    scheme, host, port, path = _parse(url)
    factory = HTTPDownloader(url, file, *args, **kwargs)
    if scheme == 'https':
        from twisted.internet import ssl
        if contextFactory is None:
            contextFactory = ssl.ClientContextFactory()
        reactor.connectSSL(host, port, factory, contextFactory)
    else:
        reactor.connectTCP(host, port, factory)
    return factory.deferred