//nodejs代码
const http = require('http');
const fs = require('fs');
const querystring = require('querystring');
const urlLib = require('url');
var users = {};
var server = http.createServer(function(req, res){
// 解析数据
if (req.url == "/favicon.ico") {
return;
}
var str='';
req.on('data', function(data){
str+=data;
});
req.on('end', function(){
var obj = urlLib.parse(req.url, true);
const url = obj.pathname;
const GET = obj.query;
const POST = querystring.parse(str);
// 区分接口、文件
if (url == '/user') {
switch(GET.act){
//注册
case 'reg':
//1、检查注册的用户名是否存在
if (users[GET.user]) {
res.write('{"ok": false, "msg": "此用户已存在"}');
//2、插入user
}else{
users[GET.user] = GET.pass;
res.write('{"ok": true, "msg": "注册成功"}')
}
break;
//登录
case 'login':
//1、检查登录用户名是否存在
if (users[GET.user] == null) {
res.write('{"ok": false, "msg": "此用户不存在"}');
//2、检查密码是否正确
}else if (users[GET.user] != GET.pass) {
res.write('{"ok": false, "msg": "用户名或密码有误"}');
}else{
res.write('{"ok": true, "msg": "登录成功"}');
}
break;
default:
res.write('{"ok" : false, "msg" : "未知的act"}');
}
res.end();
console.log(users);
console.log(GET);
console.log(GET.user);
console.log(GET.pass);
}else{
// 读取文件
var file_name = './www'+req.url;
fs.readFile(file_name, function(err, data){
if (err) {
res.write(404);
}else{
res.write(data);
}
res.end();
})
}
});
});
server.listen(8082);
//HTML + JS代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<script type="text/javascript" src="ajax.js"></script>
<script type="text/javascript">
window.onload = function(){
var oTextUser = document.getElementById("user");
var oTextPass = document.getElementById("pass");
var loginBtn = document.getElementById("login_btn");
var regBtn = document.getElementById("reg_btn");
loginBtn.onclick = function(){
ajax({
url: '/user',
data: {act: 'login', user: oTextUser.value, pass: oTextPass.value},
type: 'get',
success:function(str){
var json = eval('('+str+')');
if (json.ok) {
alert("登录成功");
}else{
alert("登录失败"+ json.msg);
}
},
error:function(){
alert("通信错误");
}
})
};
regBtn.onclick = function(){
ajax({
url:'/user',
data: {act: 'reg', user: oTextUser.value, pass: oTextPass.value},
type: 'get',
success: function(str){
var json = eval('('+str+')');
if (json.ok) {
alert("注册成功");
}else{
alert("注册失败"+json.msg);
}
},
error:function(){
alert("通信错误");
}
})
}
}
</script>
</head>
<body>
用户：<input type="text" id="user" /><br />
密码：<input type="text" id="pass" /><br />
<input type="button" value="登录" id="login_btn" />
<input type="button" value="注册" id="reg_btn" />
</body>
</html>
/** Ajax 代码
* Author:strive
* Date: 2016/1/13
*/
function json2url(json){
var arr=[];
for(var name in json){
arr.push(name+'='+json[name]);
}
return arr.join('&');
}
function ajax(json){
json=json || {};
if(!json.url)return;
json.data=json.data || {};
json.type=json.type || 'get';
var timer=null;
if(window.XMLHttpRequest){
var oAjax=new XMLHttpRequest();
}else{
var oAjax=new ActiveXObject('Microsoft.XMLHTTP');
}
switch(json.type){
case 'get':
oAjax.open('GET',json.url+'?'+json2url(json.data),true);
oAjax.send();
break;
case 'post':
oAjax.open('POST',json.url,true);
oAjax.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
oAjax.send(json2url(json.data));
break;
}
oAjax.onreadystatechange=function(){
if(oAjax.readyState==4){
clearTimeout(timer);
if(oAjax.status>=200 && oAjax.status<300 || oAjax.status==304){
json.success && json.success(oAjax.responseText);
}else{
json.error && json.error(oAjax.status);
}
}
};
}