3.nodejs(三) 經常使用API

時間  2020-08-13
標籤 3.nodejs nodejs 經常 使用 api 简体版
原文   原文鏈接

1.querystring

querystring: --- > qs npm i qs ==> qs:parse/stringify第三方插件,只有一個參數html

JSON.parse  字符串轉對象
JSON.stringify 對象轉字符串node

qs.parse() --- decode
qs.stringify() --- encodejquery

parse/stringify(str/json,第一次切割符號,第二次切割符號)linux

qs.escape()   編碼   encodeURIComponent
qs.unescape()  解碼   decodeURIComponentajax

qs.decode 對象轉字符串
qs.encode 字符串轉對象npm

1.qs.parse(); qs.stringify();
qs.js
var qs = require("querystring");

var str = "a=12&b=5"
//{a:12,b:5}
var json = qs.parse(str);

console.log(json);

console.log(qs.stringify(json));

res:json

my@my-THINK MINGW64 /d/workspace/7.11
$ node qs
{ a: '12', b: '5' }
a=12&b=5
qs3.js

//qs.parse/stringify(str,第一次切割的符號,第二次切割的符號)服務器

var qs = require("querystring");

var str = "a|12=b|5=age|20";

//qs.parse/stringify(str,第一次切割的符號,第二次切割的符號)

var json = qs.parse(str,"=","|");

console.log(json);

console.log(qs.stringify(json,"=","|"));

resapp

my@my-THINK MINGW64 /d/workspace/7.11
$ node qs3
{ a: '12', b: '5', age: '20' }
a|12=b|5=age|20
qs4.js

引入第三方模塊 npm i qsasync

//qs.parse/stringify(str) 後面不能跟分隔符號

var qs = require("qs");

var str = "a=12&b=5";

var json = qs.parse(str);

console.log(json);

console.log((qs.stringify(json)));

res:

my@my-THINK MINGW64 /d/workspace/7.11
$ node qs4
{ a: '12', b: '5' }
a=12&b=5
2.qs.escape();編碼 qs.unescape();解碼
qs2.js
var qs = require("querystring");

var str = "aaa中文";
var code = encodeURIComponent(str);
console.log(code);

console.log(decodeURIComponent(code));
console.log("----------------------");
var code = qs.escape(str);
console.log(code);
console.log(qs.unescape(code));

res:

my@my-THINK MINGW64 /d/workspace/7.11
$ node qs2
aaa%E4%B8%AD%E6%96%87
aaa中文
----------------------
aaa%E4%B8%AD%E6%96%87
aaa中文
3.
qs.encode()//轉字符串
qs.decode()//轉對象 parse
qs5.js
var qs = require("querystring");
//encode|decode

//var str = "aaa中文";
var str = "a=12&b=5";
var str = {a:12,b:5};

var code = qs.encode(str);//轉字符串  stringify

console.log(code);

console.log(qs.decode(code));//轉對象 parse

res:

my@my-THINK MINGW64 /d/workspace/7.11
$ node qs5
a=12&b=5
{ a: '12', b: '5' }

2.url

url：
url.parse()--->urlObj
url.format(urlObj)--> strUrl
url.resolve(from, to);

URLSearchParams new URLSearchParams();

地址組成：

http://www.baidu.com:80/index.html?user=aaa&pass=123#page6


http://   www.baidu.com  :80     /index.html      ?user=aaa&pass=123      #page6
 
協議      域名           端口      路徑(資源地址)   數據              錨點 哈希hash

location


Url {
  protocol: 'http:',
  slashes: true,
  auth: null,
  host: 'www.baidu.com:80',
  port: '80',
  hostname: 'www.baidu.com',
  hash: '#page6',
  search: '?user=aaa&pass=123',
  query: 'user=aaa&pass=123',
  pathname: '/index.html',
  path: '/index.html?user=aaa&pass=123',
  href: 'http://www.baidu.com:80/index.html?user=aaa&pass=123#p
age6' }



 URL {
  href: 'http://www.baidu.com/index.html?user=aaa&pass=123#page6',
  origin: 'http://www.baidu.com',
  protocol: 'http:',
  username: '',
  password: '',
  host: 'www.baidu.com',
  hostname: 'www.baidu.com',
  port: '',
  pathname: '/index.html',
  search: '?user=aaa&pass=123',
  searchParams: URLSearchParams { 'user' => 'aaa', 'pass' => '123'
},
  hash: '#page6' }
1.
.parse()轉成對象
.format()轉成字符串
url1.js
var modUrl = require("url");

var url = "http://www.baidu.com:80/index.html?user=aaa&pass=123#page6";

var urlObj = modUrl.parse(url);

console.log(1,urlObj);
console.log(2,modUrl.format(urlObj));

res:

my@my-THINK MINGW64 /d/workspace/7.11
$ node url1
1 Url {
  protocol: 'http:',
  slashes: true,
  auth: null,
  host: 'www.baidu.com:80',
  port: '80',
  hostname: 'www.baidu.com',
  hash: '#page6',
  search: '?user=aaa&pass=123',
  query: 'user=aaa&pass=123',
  pathname: '/index.html',
  path: '/index.html?user=aaa&pass=123',
  href: 'http://www.baidu.com:80/index.html?user=aaa&pass=123#page6' }
2 'http://www.baidu.com:80/index.html?user=aaa&pass=123#page6'
url2.js
var modUrl = require("url");

var url = "http://www.baidu.com:9000/index.html?user=aaa&pass=123#page6";

console.log(1,new modUrl.Url(url));
console.log(2,new modUrl.URL(url));

res:

my@my-THINK MINGW64 /d/workspace/7.11
$ node url2
1 Url {
  protocol: null,
  slashes: null,
  auth: null,
  host: null,
  port: null,
  hostname: null,
  hash: null,
  search: null,
  query: null,
  pathname: null,
  path: null,
  href: null }
2 URL {
  href: 'http://www.baidu.com:9000/index.html?user=aaa&pass=123#page6',
  origin: 'http://www.baidu.com:9000',
  protocol: 'http:',
  username: '',
  password: '',
  host: 'www.baidu.com:9000',
  hostname: 'www.baidu.com',
  port: '9000',
  pathname: '/index.html',
  search: '?user=aaa&pass=123',
  searchParams: URLSearchParams { 'user' => 'aaa', 'pass' => '123' },
  hash: '#page6' }
url3.js

.resolve(),替換路徑

var modUrl = require("url");

console.log(modUrl.resolve('http://localhost:9000/login', 'index'));  
console.log(modUrl.resolve('http://localhost:9000/login', '/index')); 

console.log(modUrl.resolve('http://localhost:9000/users/login', 'index')); 
//不加/只替換最後一個相對路徑

console.log(modUrl.resolve('http://localhost:9000/users/login', '/index'));  
//加/替換絕對路徑

res:

my@my-THINK MINGW64 /d/workspace/7.11
$ node url3
http://localhost:9000/index
http://localhost:9000/index
http://localhost:9000/users/index
http://localhost:9000/index
url4.js

URLSearchParams
new URLSearchParams();

var modUrl = require("url");

var params = new modUrl.URLSearchParams();
console.log(params);

params.append("user","aaa");
params.append("pass","123");
//append添加數據
// user=aaa&pass=123
console.log(params);
console.log(params.toString());

res:

my@my-THINK MINGW64 /d/workspace/7.11
$ node url4
URLSearchParams {}
URLSearchParams { 'user' => 'aaa', 'pass' => '123' }
user=aaa&pass=123
url5.js
//node 10以上,才能夠
var params = new URLSearchParams();

params.append("user","aaa");
params.append("pass","123");

// user=aaa&pass=123

console.log(params.toString());

res:

my@my-THINK MINGW64 /d/workspace/7.11
$ node url5

user=aaa&pass=123

3.path

path:

path.parse(path)
path.format(pathObject)

path.basename(path)
path.dirname(path) 路徑
path.extname(path)

path.join() 相對路徑 路徑拼接
path.relative() 獲取的相對路徑 路線圖
path.resolve() 絕對路徑 路徑拼接 碰到絕對路徑 會替換

__dirname 絕對路徑
__filename 絕對地址包含文件名

global 全集對象 至關於 window

path1.js
var path = require("path");

//win: \  linux /
var str = "D:\\wamp64\\www\\20180711\\path.js"; //window要用雙斜線,向右撇
var str = "D:/wamp64/www/20180711/path.js";

var pathObj = path.parse(str);

console.log(pathObj);//字符串轉對象

console.log(path.format(pathObj));//對象轉字符串

res:

my@my-THINK MINGW64 /d/workspace/7.11
$ node path1
{ root: 'D:/',
  dir: 'D:/wamp64/www/20180711',
  base: 'path.js',
  ext: '.js',
  name: 'path' }
D:/wamp64/www/20180711\path.js
path2.js
var path = require("path");

var str = "D:/wamp64/www/20180711/path.js";

console.log(path.parse(str));
console.log("--------------------------");
console.log(path.basename(str));//文件名
console.log(path.dirname(str)); //路徑
console.log(path.extname(str));//文件後綴 帶點

console.log("--------------------------");

console.log(__dirname);
console.log(__filename);

res:

my@my-THINK MINGW64 /d/workspace/7.11
$ node path2
{ root: 'D:/',
  dir: 'D:/wamp64/www/20180711',
  base: 'path.js',
  ext: '.js',
  name: 'path' }
--------------------------
path.js
D:/wamp64/www/20180711
.js
--------------------------
D:\workspace\7.11
D:\workspace\7.11\path2.js
path31.js
var path = require("path");

console.log("www"+"/index.html");//只是拼接

console.log(path.join("www","/index.html"));
console.log(path.join("www","/////index.html"));//自動去除多餘的/
console.log(path.join("www","index.html"));//自動添加/

res:

my@my-THINK MINGW64 /d/workspace/7.11
$ node path31
www/index.html
www\index.html
www\index.html
www\index.html
path32.js
var path = require("path");

console.log("www"+"/index.html");

console.log(path.join("\\a","b","c"));
console.log(path.join("/a","b","c"));

console.log(path.join("a","/b","../c")); //../返回上級目錄

res:

my@my-THINK MINGW64 /d/workspace/7.11
$ node path32
www/index.html
\a\b\c
\a\b\c
a\c
path33.js
var path = require("path");

console.log(path.relative('/data/orandea/test/aaa', '/data/orandea/impl/bbb'));

console.log(path.relative('C:\\orandea\\test\\aaa', 'C:\\orandea\\impl\\bbb'));

res:

my@my-THINK MINGW64 /d/workspace/7.11
$ node path33
..\..\impl\bbb
..\..\impl\bbb
path34.js
var path = require("path");

/*  resolve返回絕對路徑,參數前不加/,
在後面添加,加/直接替換所有  */

console.log(path.resolve("a","b","c"));
console.log(path.resolve("a","/b","/c"));
console.log(path.resolve("a/b/c","../d","../e"));

res:

my@my-THINK MINGW64 /d/workspace/7.11
$ node path34
D:\workspace\7.11\a\b\c
D:\c
D:\workspace\7.11\a\b\e

4.Buffer

Buffer 二進制流
操做方式和字符串相似

16進制 0-F

"a".chatCodeAt(0).toString(16); ascii:97 hex:61

97: a (ASCII)

String.fromCharCode(code);//ASCII轉字符

中文的範圍 4e00 - 9fa5
\u4e00(直接轉成中文)
0X4e00(轉成十進制)

hex: 16進制

Buffer.from(...); new Buffer(廢棄)

buf1.js
var str = "abc";

//var buf = new Buffer(str);
var buf = Buffer.from(str);

console.log(buf);

//16進制 中文的範圍 4e00 - 9fa5
console.log("a".charCodeAt(0).toString(16));

res:

$ node buf1
<Buffer 61 62 63>
61
buf2.js
const buf = Buffer.from('abc', 'ascii');

console.log(buf);
console.log(buf.toString('hex'));
console.log(buf.toString('base64'));

res:

$ node buf2
<Buffer 61 62 63>
616263
YWJj
buf3.js
const buf = Buffer.from([1, 2, 3]);

console.log(buf);

for(var i = 0; i < buf.length; i++){
	console.log(buf[i]);	
}
// Prints:
//   1
//   2
//   3
for (const b of buf) {
  console.log(b);
}

res:

$ node buf3
<Buffer 01 02 03>
1
2
3
1
2
3
buf4.js
var buf = Buffer.from([0x61, 0x62, 0x63]);
console.log(buf.toString());
var buf = Buffer.from("abc");
console.log(buf.toString());

res:

$ node buf4
abc
abc
buf42.js
var buf1 = Buffer.from("abc"); 

//var buf2 = Buffer.from(buf1);

var buf2 = Buffer.from("abc");

console.log(buf1.toString(),buf2.toString());//abc abc

console.log(buf1 == buf2);//false

console.log(buf1 === buf2);//false

console.log(buf1.toString() == buf2.toString());//true

console.log(Buffer.compare(buf1, buf2));//0 , 相同爲0,不一樣爲-1

res:

$ node buf42
abc abc
false
false
true
0
buf5.js
var str = "abc中文";
var buf = Buffer.from(str); 

console.log(buf);

console.log(str.length);
console.log(buf.length);
console.log(Buffer.byteLength(buf));

res:

$ node buf5
<Buffer 61 62 63 e4 b8 ad e6 96 87>
5
9
9
buf6.js
var str = "abc";

var arr = [];
for(var i = 0; i < str.length; i++){
	arr.push(Buffer.from(str[i]));//61 62 62 arr[buf1,buf2,buf3]
}
console.log(arr);
console.log(Buffer.concat(arr));

res:

$ node buf6
[ <Buffer 61>, <Buffer 62>, <Buffer 63> ]
<Buffer 61 62 63>
buf7.js

Buffer.isBuffer() 判斷是不是Buffer

var str = "abc";
console.log(Buffer.isBuffer(str));

var buf = Buffer.from(str);
console.log(Buffer.isBuffer(buf));

res:

$ node buf7
false
true
buf8.js

.equals()判斷buffer是否相等

const buf1 = Buffer.from('ABC');
const buf2 = Buffer.from('414243', 'hex');//ABC
const buf3 = Buffer.from('ABCD');

// 輸出: true
console.log(buf1.equals(buf2));

// 輸出: false
console.log(buf1.equals(buf3));

res:

$ node buf8
true
false
buf9.js
/*
buf.includes/indexOf
*/
var buf = Buffer.from('abcdef');

console.log(buf.includes("def"));//是否包含"def"

console.log(buf.indexOf("def"));
//是否包含"def",有的話輸出開始下標,沒有的話輸出-1;

res:

$ node buf9
true
3
buf10.js
/*
buf.includes/indexOf
*/
var buf = Buffer.from('abcdef');

console.log(buf.keys());
console.log(buf.values());
//buf是一個對象,需循環輸出key和value

console.log("------keys------------");
for(var n of buf.keys()){
	console.log(n);
}
console.log("------values------------");
for(var n of buf.values()){
	console.log(n,String.fromCharCode(n));
}

res:

$ node buf10
{}
{}
------keys------------
0
1
2
3
4
5
------values------------
97 'a'
98 'b'
99 'c'
100 'd'
101 'e'
102 'f'

5.events

evt1.js
var EventEmitter = require("events");

console.log(EventEmitter == EventEmitter.EventEmitter);

res:

$ node evt1
true
evt21.js
var EventEmitter = require("events");

var ev = new EventEmitter();

console.log(ev.on == ev.addListener);

//添加事件

//addListener/on
ev.on("sum",function(a,b){
	console.log("sum:",a+b);	
});
ev.addListener("abc",function(){
	console.log("abc:");	
});

//觸發

console.log(1,ev.emit("sum",12,5));
console.log(2,ev.emit("abc"));

res:

$ node evt21
true
sum: 17
1 true
abc:
2 true
evt22.js
var EventEmitter = require("events");

var ev = new EventEmitter.EventEmitter();

console.log(ev.on == ev.addListener);

//添加事件

//addListener/on
ev.on("sum",function(a,b){
	console.log("sum:",a+b);	
});
ev.addListener("abc",function(){
	console.log("abc:");	
});

//觸發

console.log(1,ev.emit("sum",12,5));
console.log(2,ev.emit("abc"));

res:

$ node evt22
true
sum: 17
1 true
abc:
2 true
evt3.js
var EventEmitter = require("events");

var ev = new EventEmitter();

console.log(1,ev.on == ev.addListener);

//添加事件

ev.prependListener("abc",function(){
	console.log(2,"abc:");	
});

//觸發
console.log(3,ev.emit("abc"));

res:

$ node evt3
1 true
2 'abc:'
3 true

6.fs 文件目錄

文件

讀寫

fs.readFile    讀
fs.writeFile    寫
fs.appendFile   添加內容
fs.unlink     刪除
fs.copyFile    複製

目錄

fs.mkdir   建立
fs.rmdir   刪除
fs.readdir   讀

狀態

文件或者目錄是否存在

fs.exists 廢棄
fs.access

判斷是不是文件或者目錄

fs.stat(path,function(stats){
		stats.isFile()/isDirectory()
})
監聽

fs.watch(filename[, options][, listener])
fs.watchFile(filename[, options], listener)

fs1.js

寫比讀先執行

var fs = require("fs");
//readFile/Sync

//讀
fs.readFile("a.txt",function(err,data){
	console.log(1,err,data);	
});
//寫,找到a.txt沒有的話建立,添加"aaa"到a.txt

fs.writeFile("a.txt","bbb",function(err){
	console.log(2,err);	//返回null,表示沒有錯誤
});

res:

$ node fs1
2 null
1 null <Buffer 62 62 62>
fs2.js

//copyFile("源文件","目標文件",回調函數)

var fs = require("fs");

//拷貝 一、先讀 二、再寫

//讀
/*fs.readFile("a.txt",function(err,data){
	if(err){
		console.log("讀取文件失敗");
	} else {
		//寫
		fs.writeFile("b.txt",data,function(err){
			if(err){
				console.log("拷貝失敗");
			} else {
				console.log("拷貝成功");
			}	
		});	
	}
	
});
*/
//copyFile("源文件","目標文件",回調函數)
fs.copyFile("a.txt","b.txt",function(err){
	if(err){
		console.log("拷貝失敗");
	} else {
		console.log("拷貝成功");
	}	
});

rse:

$ node fs2
拷貝成功
fs3.js

//appendFile 建立文件或者追加

var fs = require("fs");
//appendFile 建立文件或者追加
fs.appendFile("b.txt","append",function(err){
	console.log(err);
});

res:

$ node fs3
null
fs4.js

unlink 刪除文件 不能刪除目錄

var fs = require("fs");

//unlink 刪除文件 不能刪除目錄
fs.unlink("b.txt",function(err){
	console.log(err);
});

res:

$ node fs4
null
fs51.js

//fs.mkdir()建立目錄

var fs = require("fs");

//建立目錄
fs.mkdir("abc", function(err){
	console.log(err);	
});

res:

$ node fs51
null
fs52.js

//刪除目錄fs.rmdir

var fs = require("fs");

//刪除目錄
fs.rmdir("abc", function(err){
	console.log(err);	
});

res:

$ node fs52
null
fs53.js

//讀取目錄fs.readdir

var fs = require("fs");

//讀取目錄
fs.readdir("abc", function(err,res){
	console.log(err,res);	
});

res:

$ node fs53
null [ 'youarebeautiful' ]
fs61.js

fs.exists
//判斷文件和目錄
//文件狀態 文件、目錄是否存在 是文件 仍是目錄

var fs = require("fs");

//判斷文件和目錄
//文件狀態 文件、目錄是否存在 是文件 仍是目錄
fs.exists("abcd", (exists) => {
  	console.log(exists);
});

res:

$ node fs61
true
fs62.js

fs.access

var fs = require("fs");

//判斷文件和目錄
//文件狀態 文件、目錄是否存在 是文件 仍是目錄
fs.access("a.txt", (err) => {
  	console.log(err);
});

res:

$ node fs62
null
fs63.js
var fs = require("fs");

//判斷文件和目錄
//文件狀態 文件、目錄是否存在 是文件 仍是目錄
fs.stat("abc", (err,stats) => {
	//stats.isDirectory()是不是目錄/stats.isFile()是不是文件
  	console.log(err,stats.isFile(),stats.isDirectory());
});

res:

$ node fs63
null false true
fs71.js
var fs = require("fs");

//能夠監聽文件和目錄
//監聽有範圍限制 只有一層
fs.watch("a.txt", (eventType, filename) => {
  console.log(`事件類型是: ${eventType}-----${filename}`);
});

res:

$ node fs71
事件類型是: change-----a.txt
事件類型是: change-----a.txt
fs72.js
var fs = require("fs");

//能夠監聽文件 目錄 有延遲  目錄的文件的修改監聽不到 最好用來監聽文件
fs.watchFile("abc", (curr, prev) => {
  /*console.log(curr);
  console.log(prev);*/
  console.log(curr.mtime);
});


/*Stats {
  dev: 4145068239,
  mode: 16822,
  nlink: 1,
  uid: 0,
  gid: 0,
  rdev: 0,
  blksize: undefined,
  ino: 844424930155958,
  size: 0,
  blocks: undefined,
  atimeMs: 1531312004235.5886,
  mtimeMs: 1531312004235.5886,
  ctimeMs: 1531312004235.5886,
  birthtimeMs: 1531311081220.7952,
  atime: 2018-07-11T12:26:44.236Z,
  mtime: 2018-07-11T12:26:44.236Z,
  ctime: 2018-07-11T12:26:44.236Z,
  birthtime: 2018-07-11T12:11:21.221Z } */

res:

$ node fs72
2018-07-11T12:24:44.050Z

7.流stream

流stream

輸入流、輸出流

var rs = fs.createReadStream("src");
var ws = fs.createWriteStream("dist");

管道pipe

rs.pipe(ws);

拆解：

//一邊讀一邊寫

rs.on("data",function(data){
	ws.wrtie(data);
});
rs.on("end",function(data){
	ws.end(fn);
});

rs.on("error",function(){...})
ws.on("error",function(){...})

gzip:
一、const zlib = require('zlib');
二、必須設置一個頭：

res.writeHead(200, { 'content-encoding': 'gzip' });

三、經過管道

rs.pipe(zlib.createGzip()).pipe(res);

stream1.js
var fs = require("fs");
//輸入流 輸出
var rs = fs.createReadStream("a.txt");
var ws = fs.createWriteStream("b.txt");
//管道 pipe
rs.pipe(ws);將a.txt中的內容一步一步寫入b.txt

res:

$ node stream1
stream2.js
var fs = require("fs");

//輸入流
var rs = fs.createReadStream("a.txt");
rs.on("data",function(data){
	console.log(data);	
});
rs.on("end",function(){
	console.log("讀完了");	
});
rs.on("error",function(){
	console.log("讀取文件失敗");	
});

res:

$ node stream2
<Buffer 61 61 61>
讀完了
stream3.js
var fs = require("fs");
var ws = fs.createWriteStream("b.txt");

ws.write("abc",function(){
	console.log("write完了");	
});
ws.end("end",function(){
	console.log("end寫完了");	
});

res:

$ node stream3
write完了
end寫完了
stream4.js
var fs = require("fs");
var rs = fs.createReadStream("a.txt");
var ws = fs.createWriteStream("b.txt");

rs.on("data",function(data){
	ws.write(data);	
});
rs.on("end",function(){
	console.log("讀完了");	
	ws.end(function(){
		console.log("寫完了");	
	});
});

res:

$ node stream4
讀完了
寫完了
server.js

前面的服務器能夠寫成流 大文件能夠壓縮

var http = require("http");
var fs = require("fs");
var zlib = require("zlib");

var server = http.createServer(function(req,res){
	
	var url = req.url;
	if(url == "/favicon.ico") return;
	/*fs.readFile("www"+url,function(err,data){
		if(err){
			res.end("404");
		} else {
			res.end(data);
		}	
	});*/
	
	res.writeHead(200, { 'content-encoding': 'gzip' });
	
	var rs = fs.createReadStream("www"+url);
	
	rs.pipe(zlib.createGzip()).pipe(res);
	
});

server.listen(9000);
完整服務器代碼:

server.js

var http = require("http");
var fs = require("fs");
var zlib = require("zlib");
var modUrl = require("url");
var qs = require("querystring");
var users = {aaa:123};
var server = http.createServer(function(req,res){
	
	var url = req.url;
	var str = "";
	req.on("data",function(data){
		str += data;
	})
	
	req.on("end",function(){
		var urlObj = modUrl.parse(url,true);
		url = urlObj.pathname;
		var GET = urlObj.query;
		
		var POST = qs.parse(str);
		var params = req.method == "POST" ? POST : GET;
		var username = params.user;
		var password = params.pass;
		if(url == "/login"){
			if(users[username]){
				if(users[username] == password){
					res.end(JSON.stringify({"error":1,"msg":"登錄成功"}));
				}else{
					res.end(JSON.stringify({"error":0,"msg":"用戶名或者密碼錯誤"}));
				}
			}else{
				res.end(JSON.stringify({"error":0,"msg":"用戶名或者密碼錯誤"}));
			}
		}else if(url == "/reg"){
			if(users[username]){
				res.end(JSON.stringify({"error":0,"msg":"用戶名已存在"}));
			}else{
				users[username] = password;
				res.end(JSON.stringify({"error":1,"msg":"註冊成功"}));
			}
		}else if(url == "/favicon.ico") {
			return;
		}else{
			
			res.writeHead(200, { 'content-encoding': 'gzip' });
	
			var rs = fs.createReadStream("www"+url);
			
			rs.pipe(zlib.createGzip()).pipe(res);
			console.log(res);
			
		}
	})	
	
});

server.listen("9000",function(){
	console.log("服務器已打開!");
})

user.html

<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script src="jquery.js"></script>
		<script>
			$(function(){
				$oUser = $("#user");
				$oPass = $("#pass");
				$oLogin = $("#login");
				$oReg = $("#reg");
				$oLogin.click(function(){
					$.ajax({
						type:"get",
						url:"/login",
						data:{
							user:$oUser.val(),
							pass:$oPass.val()
						},
						async:true,
						success:function(str){
							alert(str);
						}
					});
				});
				$oReg.click(function(){
					$.ajax({
						type:"post",
						url:"/reg",
						data:{
							user:$oUser.val(),
							pass:$oPass.val()
						},
						async:true,
						success:function(str){
							alert(str);
						}
					});
				});
			})
		</script>
	</head>
	<body>
		用戶名:<input id = "user" type="text" value="aaa"/><br />
		密碼: <input id ="pass" type="text" value="123"/><br />
		<input id = "login" type="button" value="登陸"/>
		<input id = "reg" type="button" value="註冊"/>
		
	</body>
</html>
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