/// <summary>
///
/// </summary>
/// <param name="httpContext"></param>
/// <returns></returns>
public Task Invoke(HttpContext httpContext)
{
//检测是否包含'Authorization'请求头
if (httpContext.Request.Headers.ContainsKey("Authorization"))
{
var tokenHeader = httpContext.Request.Headers["Authorization"].ToString();
JwtTokenModel tm = JwtHelper.SerializeJWT(tokenHeader); //序列化token，获取授权
//授权 注意这个可以添加多个角色声明，请注意这是一个 list
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;
}
return(_next(httpContext));
}
/// <summary>
/// 解析
/// </summary>
/// <param name="jwtStr"></param>
/// <returns></returns>
public static JwtTokenModel SerializeJWT(string jwtStr)
{
var jwtHandler = new JwtSecurityTokenHandler();
JwtSecurityToken jwtToken = jwtHandler.ReadJwtToken(jwtStr);
object role = new object();;
try
{
jwtToken.Payload.TryGetValue("Role", out role);
}
catch (Exception e)
{
Console.WriteLine(e);
throw;
}
var tm = new JwtTokenModel
{
Uid = Convert.ToInt32(jwtToken.Id),
Role = role?.ToString() ?? "",
};
return(tm);
}
/// <summary>
/// 颁发JWT字符串
/// </summary>
/// <param name="tokenModel"></param>
/// <returns></returns>
public static string IssueJWT(JwtTokenModel tokenModel)
{
var dateTime = DateTime.UtcNow;
var claims = new Claim[]
{
new Claim(JwtRegisteredClaimNames.Jti, tokenModel.Uid.ToString()), //Id
new Claim("Role", tokenModel.Role), //角色
new Claim(JwtRegisteredClaimNames.Iat, dateTime.ToString(), ClaimValueTypes.Integer64)
};
//秘钥
var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(secretKey));
var creds = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);
var jwt = new JwtSecurityToken(
issuer: "Demo.Core",
claims: claims, //声明集合
expires: dateTime.AddHours(2),
signingCredentials: creds);
var jwtHandler = new JwtSecurityTokenHandler();
var encodedJwt = jwtHandler.WriteToken(jwt);
return(encodedJwt);
}
