我们添加一个弹出窗口，在右上角添加一个按钮，然后点击按钮弹出一个窗口，
输入账号和密码，点击登录按钮，ajax发起对webapi的请求，api根据账号和密码，验证用户
验证通过就生成JWT的Token，然后发送Token过来。前端把Token写入到localStrage中。
然后刷新整个页面。以后很多地方，需要调用后台其他的接口api，这些接口api比如请求左侧菜单
请求当前登录人信息。等等。调用这些API的时候都要带上Token。
那么下面我们首先实现登录框。
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Full Layout - jQuery EasyUI Demo</title>
<link rel="stylesheet" type="text/css" href="jquery-easyui-1.6.8/themes/default/easyui.css">
<link rel="stylesheet" type="text/css" href="jquery-easyui-1.6.8/themes/icon.css">
<script src="jquery-easyui-1.6.8/jquery.min.js"></script>
<script type="text/javascript" src="jquery-easyui-1.6.8/jquery.easyui.min.js"></script>
</head>
<body class="easyui-layout">
<div data-options="region:'north',border:false" style="height:60px;background:#B3DFDA;padding:10px;">
<div style="float:right;">
<a href="javascript:void(0)" class="easyui-linkbutton" onclick="$('#w').window('open')">登录</a>
<a href="javascript:void(0)" class="easyui-linkbutton" onclick="$('#w').window('close')">Close</a>
</div>
</div>
<div data-options="region:'west',split:true,title:'West'" style="width:150px;padding:10px;">west content</div>
<div data-options="region:'south',border:false" style="height:30px;background:#A9FACD;padding:10px;">south region</div>
<div data-options="region:'center',title:'Center'"></div>
<div id="w" class="easyui-window" title="登录系统" data-options="modal:true,closed:true,iconCls:'icon-save'" style="width:400px;height:250px;padding:10px;">
<form id="ff" class="easyui-form" method="post" data-options="novalidate:true">
<div style="margin-bottom:20px">
<input id="idname" class="easyui-textbox" name="name" style="width:100%" data-options="label:'账号:',required:true">
</div>
<div style="margin-bottom:20px">
<input id="idpassword" class="easyui-passwordbox" name="password" style="width:100%" data-options="label:'密码:',required:true">
</div>
</form>
<div style="text-align:center;padding:5px 0">
<a href="javascript:void(0)" class="easyui-linkbutton" onclick="submitForm()" style="width:80px">提交</a>
<a href="javascript:void(0)" class="easyui-linkbutton" onclick="clearForm()" style="width:80px">清除</a>
</div>
</div>
<script>
function submitForm(){
var isValide = $('#ff').form('enableValidation').form('validate');
if (isValide) {
var name = $("#idname").val();
var password = $("#idpassword").val();
$.ajax({
type: "POST",
url: "http://localhost:23557/api/login",
data: JSON.stringify({name:name,password:password}),
contentType: "application/json",
success: function (data) {
if (data) {
localStorage.setItem("Token", data);
window.location.href = "/index.html";
}
},
error: function (data) {
}
});
}
}
function clearForm(){
$('#ff').form('clear');
}
</script>
</body>
</html>
下面是后台
using JWT;
using JWT.Algorithms;
using JWT.Serializers;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;
namespace Demo.Controllers
{
public class LoginController : ApiController
{
private string secret = "bamn.cn";
public string Post(dynamic obj)
{
IDateTimeProvider provider = new UtcDateTimeProvider();
var now = provider.GetNow();
var unixEpoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc); // or use JwtValidator.UnixEpoch
var secondsSinceEpoch = Math.Round((now - unixEpoch).TotalSeconds);
var payload = new Dictionary<string, object>
{
{"name", obj.name },
{"exp",secondsSinceEpoch+10 },
{"jti","luozhipeng" }
};
Console.WriteLine(secondsSinceEpoch);
IJwtAlgorithm algorithm = new HMACSHA256Algorithm();
IJsonSerializer serializer = new JsonNetSerializer();
IBase64UrlEncoder urlEncoder = new JwtBase64UrlEncoder();
IJwtEncoder encoder = new JwtEncoder(algorithm, serializer, urlEncoder);
var token = encoder.Encode(payload, secret);
return token;
}
}
}
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