All mirrors are also browsable via HTTP or FTP protocol.
When downloading very large file (> 2GB) use client with large files support:
When using Debian mirrors automatic download and upgrade of packages could be done via the excellent apt tool configuring your /etc/apt/sources.list as it follows:
deb ftp://giano.com.dist.unige.it/debian/ stable main contrib non-free deb-src ftp://giano.com.dist.unige.it/debian/ stable main contrib non-free