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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152
｜
第
14
章
那些对你的
SEO
方案很重要的内容之前，先确认一下是不是没有别的选择了。
Express
的路由机制默认没有把子域名纳入考虑
：
app.get(/about)
会处理请求
http://
meadowlarktravel.com/about
、
ht
tp://www.meadowlarktravel.com/about
和
http://admin.
meadowlarktravel.com/about
。
如果你希望单独处理一个子域名，可以使用一个名为
vhost
（代表“
virtual host
”，来自
Apache
的一个常用于处理子域名的机制）的包。首先，安装这
个包（
npm install vhost
）。为了能够在你的开发机器测试基于域名的路由，你需要某种
方法来“伪装”域名。幸运的是，你的
hosts
文件就是用来做这个的
。在
macOS
和
Linux
机器上，它位于
/etc/hosts
中。
在
Windows
上，它位于
c:\windows\system32\drivers\etc\hosts
中。在
hosts
文件中增加以下内容（你需要管理员权限才能编辑它）
：
127.0.0.1 admin.meadowlark.local
127.0.0.1 meadowlark.local
这会告诉你的计算机，把
meadowlark.local
和
admin.meadowlark.local
视为常规的互联网域
名，但是映射到
localhost
（
127.0.0.1
）
。我们使用
.local
这个顶级域名是为了让自己不混淆
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.