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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request
和
response
对象
｜
53
端口（port）
每个服务器都有一套用数字表示的端口。有些端口很特别，比如
80
和
443
。如果省去端
口，
HTTP
的端口
就默认为
80
，而
HTTPS
的端口就默认为
433
。一般来说，如果不使
用
80
和
433
端口，
就应该使用大于
1023
的端口
1
。使用最多的是数字易记的端口，比如
3000
、
8080
和
8088
。如果给定一个端口，
则只有一个服务器应用可以关联，所以，虽然
可以选择的端口非常多，但如果使用的是常用端口，就可能会冲突，不得不另换一个。
路径（path）
URL
的各个部分中
，路径通常是应用需要最先考虑的部分（基于协议、主机和端口做
决策是可以的，但实践效果不好）。路径应当用于唯一标识应用中的页面或其他资源。
查询串（querystring）
查询串是可选的，是名
/
值对的集合
。查询串以一个问号（
?
）开始，名
/
值对用和号
（
&
）分隔
。名和值两部分都应当是由
URL
编码过的
。
JavaScript
提供了一个内建函数
来实现
URL
编
码：
encodeURIComponent
。例如，空格将被取代为加号（
+
）。其他特别
的字符会被取代为数字形式的字符引用。查询串有时候也被称为
搜索串
或
搜索
。
片段（fragment）
片段（或
散列
）根本不会传给服务器，它只限于浏览器使用。有些单页应用使用片段来
控制应用导航。起初，片段的目的只是让浏览器显示文档的指定部分，而此部分要通过
一个锚标签来标记（例如：
<a id="chapter06">
）。
6.2
HTTP
请求方法
HTTP
协议定义了一批客户端跟服务器通信的 ...
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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.