using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Web;
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using JWT;
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using JWT.Algorithms;
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using JWT.Exceptions;
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using JWT.Serializers;
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using Newtonsoft.Json;
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namespace VueWebApi.Tools
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{
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public class JwtTools
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{
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public static string Key { get; set; } = "Hello World"; //不要泄密
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//加密
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public static string Encode(Dictionary<string, object> payLoad, string key = null)
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{
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if (string.IsNullOrEmpty(key))
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{
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key = Key;
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}
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IJwtAlgorithm algorithm = new HMACSHA256Algorithm();
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IJsonSerializer serializer = new JsonNetSerializer();
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IBase64UrlEncoder urlEncoder = new JwtBase64UrlEncoder();
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IJwtEncoder encoder = new JwtEncoder(algorithm, serializer, urlEncoder);
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//添加一个Jwt时效串
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payLoad.Add("timeout", DateTime.Now.AddDays(1));
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return encoder.Encode(payLoad, key);
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}
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//解密
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public static Dictionary<string, object> Decode(string jwtstr, string key = null)
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{
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if (string.IsNullOrEmpty(key))
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{
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key = Key;
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}
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try
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{
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IJsonSerializer serializer = new JsonNetSerializer();
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IDateTimeProvider provider = new UtcDateTimeProvider();
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IJwtValidator validator = new JwtValidator(serializer, provider);
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IBase64UrlEncoder urlEncoder = new JwtBase64UrlEncoder();
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IJwtAlgorithm algorithm = new HMACSHA256Algorithm();
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IJwtDecoder decoder = new JwtDecoder(serializer, validator, urlEncoder, algorithm);
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var json = decoder.Decode(jwtstr, key, verify: true);//token为之前生成的字符串
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//string---->Dictionary
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//把一个字符串反向生成对应的对象内容
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var result = JsonConvert.DeserializeObject<Dictionary<string, object>>(json);
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if ((DateTime)result["timeout"] < DateTime.Now)
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{
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throw new Exception(message:"Jwt已过期,请重新登录");
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}
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result.Remove(key: "timeout");
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return result;
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}
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catch (TokenExpiredException)
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{
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throw; //请求超时
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}
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catch (SignatureVerificationException)
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{
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throw; //签名验证失败，数据可能被篡改
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}
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}
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//校验登录
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//public static string key = "123456";
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//public static string ValideLogined(HttpRequest req)
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//{
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// if (req.Headers["token"] == null)
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// throw new Exception(message: "请登录!");
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// return Decode(token: req.Headers["token"], key);
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//}
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}
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}
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