add telemetry

AobaServer/Auth/MetricsTokenValidator.cs

@@ -0,0 +1,42 @@
+using Microsoft.IdentityModel.Tokens;
+
+using System.IdentityModel.Tokens.Jwt;
+using System.Security.Claims;
+
+namespace AobaServer.Auth;
+
+public class MetricsTokenValidator(AuthInfo authInfo) : JwtSecurityTokenHandler
+{
+	private readonly JwtSecurityTokenHandler _handler = new();
+	public override Task<TokenValidationResult> ValidateTokenAsync(string token, TokenValidationParameters validationParameters)
+	{
+		try
+		{
+			var principal = _handler.ValidateToken(token, new TokenValidationParameters
+			{
+				ValidateIssuerSigningKey = true,
+				IssuerSigningKey = new SymmetricSecurityKey(authInfo.SecureKey),
+				ValidateIssuer = true,
+				ValidIssuer = authInfo.Issuer,
+				ValidateAudience = true,
+				ValidAudience = "metrics",
+				ValidateLifetime = false,
+				ClockSkew = TimeSpan.FromMinutes(1)
+			}, out var validatedToken);
+			return Task.FromResult(new TokenValidationResult
+			{
+				IsValid = true,
+				SecurityToken = validatedToken,
+				ClaimsIdentity = new ClaimsIdentity(principal.Identity),
+			});
+		}
+		catch (Exception e)
+		{
+			return Task.FromResult(new TokenValidationResult
+			{
+				IsValid = false,
+				Exception = e
+			});
+		}
+	}
+}