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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Express
是什么
｜
5
一个基于
Ruby
的
Web
框架。
Express
借鉴一个用
Ruby
写的框架并不奇怪：在
Web
开发方面，
Ruby
孵化出了大量卓越的新思路、新方法，使
We
b
开发变得更快捷、更高效和更好维护。
就像深受
Sinatra
启发一样
，
Express
还跟
Connect
深度交织在一起，这是
Node
应用的一
个插件库。
Connect
最初使用
中间件
这个术语来描述各种能在不同程度上处理
We
b
请求的
可插拔的
Node
模
块。
2014
年，
4.0
版本的
Node
移除了对
Connect
的依赖，不过仍然把其
“中间件”概念归功于
Connect
。
从版本
2.
x
到
3.0
，
Express
经历了大规模的重写；从
3.
x
到
4.0
，亦如此。本
书关注的是版本
4.0
。
1.5
Node
：
另一种
Web
服务器
某种程度上，
Node
跟其他几个流行的
Web
服务器，如微软的
IIS
或
Apache
，有很多共同
之处。不过，更有意思的是它们究竟有哪些不同。让我们从这里开始讲起。
对于
We
b
服务器，
Node
的做法也是最小化，这一点跟
Express
一样。不像
IIS
或
Apache
那样，需要花上数年时间去掌握，
Node
是很容易搭建和配置的
。这并不是说在生产环境
中为达到性能最大化去调优
Node
服务
器是一件很简单的事情，而是说比起那些服务器，
Node
的配置选项要简单多了。
Node
跟传统
We
b
服务器的另一个显著差异就是，
Node
是单线程的。乍一看去，这似乎
是一步倒退。而事实上，这是明智之举。单线程极大地简化了
We
b
应用的编程，而当需
要达到多线程应用的性能时 ...
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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.
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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.