添加项目文件。

StoreHub.Framework/Security/CurrentUser.cs

@@ -0,0 +1,76 @@
+using Microsoft.AspNetCore.Http;
+using System.Globalization;
+using System.Security.Claims;
+
+namespace StoreHub.Framework.Security;
+
+/// <summary>
+/// 从 <see cref="IHttpContextAccessor"/> 读取当前请求认证票据的默认实现。
+/// </summary>
+public class CurrentUser : ICurrentUser
+{
+	private readonly IHttpContextAccessor _httpContextAccessor;
+
+	public CurrentUser(IHttpContextAccessor httpContextAccessor)
+	{
+		_httpContextAccessor = httpContextAccessor;
+	}
+
+	/// <summary>
+	/// 当前请求的 <see cref="ClaimsPrincipal"/>
+	/// </summary>
+	private ClaimsPrincipal? Principal => _httpContextAccessor.HttpContext?.User;
+
+	/// <inheritdoc />
+	public bool IsAuthenticated => Principal?.Identity?.IsAuthenticated == true;
+
+	/// <inheritdoc />
+	public int? Id
+	{
+		get
+		{
+			string? value = GetClaimValue(JwtClaimTypes.UserId);
+			return int.TryParse(value, NumberStyles.Integer, CultureInfo.InvariantCulture, out int id) ? id : null;
+		}
+	}
+
+	/// <inheritdoc />
+	public string? UserName => GetClaimValue(JwtClaimTypes.UserName);
+
+	/// <inheritdoc />
+	public string? NickName => GetClaimValue(JwtClaimTypes.NickName);
+
+	/// <inheritdoc />
+	public IEnumerable<Claim> Claims => Principal?.Claims ?? [];
+
+	/// <inheritdoc />
+	public string? GetClaimValue(string claimType)
+	{
+		if (string.IsNullOrWhiteSpace(claimType))
+		{
+			return null;
+		}
+
+		return Principal?.FindFirst(claimType)?.Value;
+	}
+
+	/// <inheritdoc />
+	public T? GetClaimValue<T>(string claimType)
+	{
+		string? value = GetClaimValue(claimType);
+		if (value is null)
+		{
+			return default;
+		}
+
+		try
+		{
+			return (T)Convert.ChangeType(value, typeof(T), CultureInfo.InvariantCulture);
+		}
+		catch
+		{
+			return default;
+		}
+	}
+}
+