June 2021
Intermediate to advanced
290 pages
9h 21m
Chinese
Content preview from Node与Express开发（第2版）
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243
够精确体现其组织的域名。选择域名时，应该考虑域名要怎么用。如果计划主要用于在线
的市场推广（人们更有可能点击链接而不是手动输入域名），就应该更看重易记的或有意
义的域名，而不是短域名。如果你关注的是推送广告，或者有理由相信人们会把你的
URL
手动输入到设备里，或许应该考虑其他的顶级域名，以便获得一个更短小的域名。使用两
个域名也是很常见的做法：一种是短小的、易于输入的；一种是更长一些的、更适合市场
推广的。
21.1.4
子域名
顶级域名是域名的末尾部分，子域名则是开头部分。目前为止，最常见的子域名是
www
。
我从来没有特别注意过这个子域名，毕竟，你就在计算机上使用着万维网。可以很肯
定地说，即使没有
www
提醒你自己正在干什么
，你也不会感到疑惑。因此，对你的主
域名，我不推荐使用子域名。直接使用
http://meadowlarktravel.com/
而不是
http://www
.
meadowlarktravel.com/
，这样域名就可以变得更简短
，而且多亏了重定向，对于那些不管
访问什么都自动地在前面加上
www
的人，他们的访问也不会有丢失的危险。
子域名也被用于其他的目的。我经常见到类似于
blogs.meadowlarktravel.com
、
api.meadowlarktravel.com
和
m.meadowlarktravel.com
（用于移动版网站）这样的域名。这样
做常常是出于技术的原因。例如，如果跟网站的其他部分相比，你的博客使用的是完全不
同的服务器，那么让博客使用一个子域名就会更加容易。不过 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.