/// <summary>
/// 处理http请求
/// </summary>
/// <param name="httpContext">http请求上下文</param>
/// <returns></returns>
public Task Invoke(HttpContext httpContext)
{
// 检测是否包含'Authorization'请求头
if (!httpContext.Request.Headers.ContainsKey("Authorization"))
{
return(_next(httpContext));
}
// 获取token 并去除Bearer
var tokenHeader = httpContext.Request.Headers["Authorization"].ToString().Replace("Bearer ", "");
TokenModelJWT tm = JwtHelper.SerializeJWT(tokenHeader); // 序列化token，获取授权
// 授权 可以是多个角色
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>
/// 颁发JWT字符串
/// </summary>
/// <param name="tokenModel"></param>
/// <returns></returns>
public static string IssueJWT(TokenModelJWT 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)
//};
var claims = new Claim[]
{
// Claim的默认配置
new Claim(JwtRegisteredClaimNames.Jti, Guid.NewGuid().ToString()),
new Claim(JwtRegisteredClaimNames.Iat, $"{new DateTimeOffset(DateTime.Now).ToUnixTimeSeconds()}"),
new Claim(JwtRegisteredClaimNames.Nbf, $"{new DateTimeOffset(DateTime.Now).ToUnixTimeSeconds()}"),
// 设置JWT过期时间 100秒
new Claim(JwtRegisteredClaimNames.Exp, $"{new DateTimeOffset(DateTime.Now.AddSeconds(100)).ToUnixTimeSeconds()}"),
new Claim(JwtRegisteredClaimNames.Iss, "Blog.Core"),
new Claim(JwtRegisteredClaimNames.Aud, "wr"),
// 使用官方UseAuthentication授权要验证的Role
new Claim(ClaimTypes.Role, tokenModel.Role)
};
//秘钥
var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(secretKey));
var creds = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);
var jwt = new JwtSecurityToken(
issuer: "Blog.Core",
claims: claims, //声明集合
expires: dateTime.AddHours(2),
signingCredentials: creds);
var jwtHandler = new JwtSecurityTokenHandler();
var encodedJwt = jwtHandler.WriteToken(jwt);
return(encodedJwt);
}
/// <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("Role", out role);
}
catch (Exception e)
{
Console.WriteLine(e);
throw;
}
var tm = new TokenModelJWT
{
Uid = (jwtToken.Id).ObjToInt(),
Role = role != null?role.ObjToString() : "",
};
return(tm);
}
