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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160
第 15章
REST API
和
JSON
虽然第
8
章给出过一些
REST API
的例子，但是目前为止，我们的做事模式几乎是“在服
务器端处理这些数据，然后给客户端发送格式化处理的
HTML
”
。渐渐地，这不再是
Web
应用的默认操作模式。取而代之的是单页应用（
S
PA
），大多数现代
Web
应用属于
SPA
。
SPA
的操作模式是把所有的
HTML
和
CSS
都打成一个静态资源包
，客户端接收整个资源
包，随后依靠接收
JSON
格式的零散数据直接操作
HTML
。与此同时
，提交表单到服务器
来通知变更的重要性降低了，被直接使用
HTTP
请求来跟
API
通信替代。
以前我们使用
Express
提
供格式化处理的
HTML
，现在把注意力转移到使用
Express
提供
API
端点上来
。这些内容在第
16
章将派上大用场，到时会演示我们提供的
API
是如何用
于动态应用渲染的。
本章会将应用的视图都剥离掉，只留下一个“
coming
soon
”的
HTML
界面，到第
16
章再
填充视图。本章将专注于
API
，
这个
API
将提供对度假产品数据库的访问，同时也支持对
产品上市通知的订阅。
Web
服务
是一个宽泛的术语，可以指任何通过
HTTP
访问的
API
。
We
b
服务的理念已经出
现相当长一段时间了，但最近，实现
We
b
服务的技术都太死板、神秘化，而且过度复杂。
现在仍有一些系统在使用这些技术（比如
SOAP
和
WSDL
）
，你也可以使用一些
Node
包来
跟这些系统打交道。不过本章不会讨论这些。我们将专注于提供所谓的
RESTful
风
格的服
务，跟它们打交道要简单直白得多。
缩写词
REST
代表 ...
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