61 lines
2.1 KiB
C#
61 lines
2.1 KiB
C#
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using Authentication;
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using Avalonia_Services.Core;
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using System;
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using System.Security.Claims;
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using System.Threading.Tasks;
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namespace Avalonia_PC.Authentication
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{
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/// <summary>
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/// PC 端鉴权服务，基于全局 Token 验证用户身份，实现 <see cref="IAuthService"/>。
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/// </summary>
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public sealed class PcAuthService(PcGlobalTokenService tokenService) : IAuthService
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{
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/// <inheritdoc />
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public async Task<ClaimsPrincipal?> AuthenticateAsync(ServiceEndpointContext context)
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{
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var token = ExtractBearerToken(context.GetHeader("Authorization"));
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if (!await tokenService.ValidateAsync(token))
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{
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return null;
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}
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var identity = new ClaimsIdentity(
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[
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new Claim(ClaimTypes.NameIdentifier, "pc-local"),
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new Claim(ClaimTypes.Name, "PC授权用户"),
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new Claim(ClaimTypes.Role, "SuperAdmin"),
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new Claim(ClaimTypes.Role, "Admin"),
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new Claim("auth_type", "pc-global-token"),
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],
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"pc-global-token");
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return new ClaimsPrincipal(identity);
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}
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/// <inheritdoc />
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public Task<bool> AuthorizeAsync(ClaimsPrincipal user, string policy)
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{
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return Task.FromResult(user.Identity?.IsAuthenticated == true);
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}
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/// <summary>
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/// 从 Authorization 头中提取 Bearer Token。
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/// </summary>
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/// <param name="authorization">Authorization 头的值。</param>
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/// <returns>提取的 Token 字符串；若无法提取则返回 null。</returns>
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private static string? ExtractBearerToken(string? authorization)
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{
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if (string.IsNullOrWhiteSpace(authorization))
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{
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return null;
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}
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string prefix = "Bearer ";
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return authorization.StartsWith(prefix, StringComparison.OrdinalIgnoreCase)
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? authorization[prefix.Length..].Trim()
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: authorization.Trim();
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}
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}
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}
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