/// <summary>
/// 颁发JWT字符串
/// </summary>
/// <param name="tokenModel"></param>
/// <returns></returns>
public static string IssueJWT(TokenModelJWT tokenModel)
{
var dateTime = DateTime.UtcNow;
string iss = Appsettings.app(new string[] { "Audience", "Issuer" });
string aud = Appsettings.app(new string[] { "Audience", "Audience" });
string secret = Appsettings.app(new string[] { "Audience", "Secret" });
//var claims = new Claim[] //old
var claims = new List <Claim>
{
//下边为Claim的默认配置
new Claim(JwtRegisteredClaimNames.Jti, tokenModel.Uid.ToString()),
new Claim(JwtRegisteredClaimNames.Iat, $"{new DateTimeOffset(DateTime.Now).ToUnixTimeSeconds()}"),
new Claim(JwtRegisteredClaimNames.Nbf, $"{new DateTimeOffset(DateTime.Now).ToUnixTimeSeconds()}"),
//这个就是过期时间，目前是过期100秒，可自定义，注意JWT有自己的缓冲过期时间
new Claim(JwtRegisteredClaimNames.Exp, $"{new DateTimeOffset(DateTime.Now.AddSeconds(100)).ToUnixTimeSeconds()}"),
new Claim(JwtRegisteredClaimNames.Iss, iss),
new Claim(JwtRegisteredClaimNames.Aud, aud),
//new Claim(ClaimTypes.Role,tokenModel.Role),//为了解决一个用户多个角色(比如：Admin,System)，用下边的方法
};
// 可以将一个用户的多个角色全部赋予；
// 作者：DX 提供技术支持；
claims.AddRange(tokenModel.Role.Split(',').Select(s => new Claim(ClaimTypes.Role, s)));
//秘钥 (SymmetricSecurityKey 对安全性的要求，密钥的长度太短会报出异常)
var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(secret));
var creds = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);
var jwt = new JwtSecurityToken(
issuer: iss,
claims: claims,
signingCredentials: creds);
var jwtHandler = new JwtSecurityTokenHandler();
var encodedJwt = jwtHandler.WriteToken(jwt);
return(encodedJwt);
}
/// <summary>
///
/// </summary>
/// <param name="httpContext"></param>
/// <returns></returns>
public Task Invoke(HttpContext httpContext)
{
PreProceed(httpContext);
//检测是否包含'Authorization'请求头
if (!httpContext.Request.Headers.ContainsKey("Authorization"))
{
PostProceed(httpContext);
return(_next(httpContext));
}
//var tokenHeader = httpContext.Request.Headers["Authorization"].ToString();
var tokenHeader = httpContext.Request.Headers["Authorization"].ToString().Replace("Bearer ", "");
try
{
if (tokenHeader.Length >= 128)
{
TokenModelJWT tm = JwtHelper.SerializeJWT(tokenHeader);
//授权
var claimList = new List <Claim>();
var claim = new Claim(ClaimTypes.Role, tm.Role);
claimList.Add(claim);
var identity = new ClaimsIdentity(claimList);
var principal = new ClaimsPrincipal(identity);
httpContext.User = principal;
}
}
catch (Exception e)
{
Console.WriteLine($"{DateTime.Now} middleware wrong:{e.Message}");
}
PostProceed(httpContext);
return(_next(httpContext));
}
/// <summary>
/// 解析
/// </summary>
/// <param name="jwtStr"></param>
/// <returns></returns>
public static TokenModelJWT SerializeJWT(string jwtStr)
{
var jwtHandler = new JwtSecurityTokenHandler();
JwtSecurityToken jwtToken = jwtHandler.ReadJwtToken(jwtStr);
object role = new object();;
try
{
jwtToken.Payload.TryGetValue(ClaimTypes.Role, out role);
}
catch (Exception e)
{
Console.WriteLine(e);
throw;
}
var tm = new TokenModelJWT
{
Uid = Convert.ToInt32(jwtToken.Id),
Role = role != null?role.ToString() : "",
};
return(tm);
}
