title: Aria2 一个轻量级的命令行下载工具
date: 2018-6-5
categories: [工具]

aria2 是一个轻量级的、多源、跨平台的命令行下载实用工具。它支持HTTP/HTTPS、FTP、SFTP、BitTorrent和Metalink。
我们可以在GitHub上下载最新的稳定版

特点

• Multi-Connection Download. aria2 can download a file from multiple sources/protocols and tries to utilize your maximum download bandwidth. Really speeds up your download experience.

• 多线程连接下载，最大限度的利用您的宽带

• Lightweight. aria2 doesn’t require much memory and CPU time. When disk cache is off, the physical memory usage is typically 4MiB (normal HTTP/FTP downloads) to 9MiB (BitTorrent downloads). CPU usage in BitTorrent with download speed of 2.8MiB/sec is around 6%.

• 轻量级，不需要太多的内存与cpu资源

• Fully Featured BitTorrent Client. All features you want in BitTorrent client are available: DHT, PEX, Encryption, Magnet URI, Web-Seeding, Selective Downloads, Local Peer Discovery and UDP tracker.

• 支持所有的BitTorrent的客户端特性

• Metalink Enabled. aria2 supports The Metalink Download Description Format (aka Metalink v4), Metalink version 3 and Metalink/HTTP. Metalink offers the file verification, HTTP/FTP/SFTP/BitTorrent integration and the various configurations for language, location, OS, etc.

• 支持Metalink

• Remote Control. aria2 supports RPC interface to control the aria2 process. The supported interfaces are JSON-RPC (over HTTP and WebSocket) and XML-RPC.

• 支持远程控制下载

如何使用

建议添加aria2所在目录到系统path中，方便在任意位置使用aria2c命令

1. 从网上下载文件:

$ aria2c http://example.org/mylinux.iso

2. 同时下载多个文件

$ aria2c http://a/f.iso ftp://b/f.iso

3. 使用两个连接下载

$ aria2c -x 2 http://a/f.iso

4. 使用BitTorrent下载

$ aria2c http://example.org/mylinux.torrent

5. 使用BitTorrent Magnet URI下载:

$ aria2c 'magnet:?xt=urn:btih:248D0A1CD08284299DE78D5C1ED359BB46717D8C'

6. 下载文本中的连接

$ aria2c -i uris.txt

7. 修改名称与路径

$ aria2c http://example.org/a.txt -o b.txt -d your-dir

UI 框架

• webui-aria2: 一个网页端的aria2实现
• persepolis: 一个python写的aria2的客户端

参考

• aria2 docs