NodeJs -- URL 模块.

Posted 2020-09-30 cb_za

tags:

篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了NodeJs -- URL 模块.相关的知识，希望对你有一定的参考价值。

1. url.parse(网址): 将字符串解析成对象.

1-1) 一个参数 : 或者参数1, false(默认), false(默认)

var url = require(\'url\');

console.log(url.parse("http://www.baidu.com:8080/list?c=Cate&a=index#main"));
console.log(url.parse("https://user:pass@sub.host.com:8080/p/a/t/h?query=string#hash"));
console.log(url.parse("http://127.0.0.1/culture/action.php?c=HCourseProxy&a=displaySuccess&courseId=4"));

运行:

--------------------------------------------------

1-2) 两个参数或者是参数1, true, false(默认)

如果第二个参数设置为 true. 那么 query属性就会调用 querystring模块的方法 ,生成一个对象.

1 var url = require(\'url\');
2 
3 console.log(url.parse("http://www.baidu.com:8080/list?c=Cate&a=index#main", true));
4 console.log(url.parse("https://user:pass@sub.host.com:8080/p/a/t/h?query=string#hash", true));
5 console.log(url.parse("http://127.0.0.1/culture/action.php?c=HCourseProxy&a=displaySuccess&courseId=4", true));

运行:

1-3) 三个参数: 参数1 , 参数2(布尔值), true

对于不知道是什么协议的时候, 如果想解析//www.baidu.com:8080/list?c=Cate&a=index#main 这种 , 就可以将第三个参数设置为 true.

1 var url = require(\'url\');
2 
3 console.log(url.parse("//www.baidu.com:8080/list?c=Cate&a=index#main"));
4 console.log(url.parse("//www.baidu.com:8080/list?c=Cate&a=index#main", false, true));
5 
6 console.log(url.parse("//baidu.com:8080/list?c=Cate&a=index#main"));
7 console.log(url.parse("//baidu.com:8080/list?c=Cate&a=index#main", false, true));

1-4) 实例:

第一: 入口文件: index.js

1 var server = require(\'./server\');
2 
3 server.start();

require(\'./server\'); 引入的是 自己定义的本地模块 . 这里 是   ./server

第二: 服务器文件: server.js

 1 var http = require("http");
 2 var url = require("url");
 3 
 4 
 5 function start(){
 6     http.createServer(function(request, response) {
 7 
 8         console.log(url.parse(request.url));
 9         console.log(url.parse(request.url).query);
10         var pathname = url.parse(request.url).pathname;
11         console.log(\'request for [\' +pathname+ "] received.");
12         response.writeHead(200, {"Content-Type": "text/plain"});
13         response.write("Hello World");
14           response.end();
15     }).listen(8888);
16 
17     console.log("server has started.");
18 }
19 
20 exports.start = start;

访问:

浏览器访问:

结果控制台输出:

不同的网址的输出: pathname, pathname.query . pathname.pathname

-------

----

2. url.format(对象) 将对象转成字符串

var url = require(\'url\');

console.log(url.format({
  protocol: \'https:\',
  slashes: true,
  auth: \'user:pass\',
  host: \'sub.host.com:8080\',
  port: \'8080\',
  hostname: \'sub.host.com\',
  hash: \'#hash\',
  search: \'?query=string\',
  query: \'query=string\',
  pathname: \'/p/a/t/h\',
  path: \'/p/a/t/h?query=string\',
  href: \'https://user:pass@sub.host.com:8080/p/a/t/h?query=string#hash\' }));

运行:

3. url.resolve()

 1 var url = require(\'url\');
 2 
 3 console.log(url.resolve("http://www.runoob.com/", "nodejs/nodejs-path-module.html"));
 4 console.log(url.resolve("http://www.runoob.com/", "/nodejs/nodejs-path-module.html"));
 5 
 6 console.log(url.resolve("http://www.runoob.com/list/", "nodejs/nodejs-path-module.html"));
 7 console.log(url.resolve("http://www.runoob.com/list/", "/nodejs/nodejs-path-module.html"));
 8 console.log(url.resolve("http://www.runoob.com/list", "/nodejs/nodejs-path-module.html"));
 9 
10 console.log(url.resolve("http://www.runoob.com/list/cate/", "../nodejs-path-module.html"));
11 console.log(url.resolve("http://www.runoob.com/list/cate", "../nodejs-path-module.html"));