添加项目文件。
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using Asp.Versioning.OpenApi;
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using Microsoft.AspNetCore.Authentication.JwtBearer;
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using Microsoft.AspNetCore.Authorization;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.IdentityModel.Tokens;
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using Microsoft.OpenApi;
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using StoreHub.Framework.Security;
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using System.Security.Claims;
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using System.Text;
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namespace StoreHub.Framework.DependencyInjection;
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/// <summary>
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/// JWT 认证服务注册入口(由宿主 Program.cs 调用)。
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/// </summary>
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public static class JwtServiceCollectionExtensions
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{
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/// <summary>
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/// 注册 JWT 认证:
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/// <list type="number">
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/// <item>绑定 <c>Jwt</c> 配置节到 <see cref="JwtOptions"/>,并在启动时校验签名密钥长度;</item>
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/// <item>注册 <see cref="ITokenService"/>(令牌生成/校验)与 <see cref="ICurrentUser"/>(当前用户访问器);</item>
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/// <item>注册 <see cref="JwtBearerDefaults"/> 认证,认证失败/授权失败统一返回 <see cref="StoreHub.Framework.Commons.ApiResult{T}"/> 格式;</item>
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/// <item>注册 <see cref="IOnlineUserStore"/>(基于 <c>IMemoryCache</c> 的在线会话存储):单点登录、在线人员查询、退出销毁;</item>
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/// <item>为 OpenAPI 文档声明 Bearer(JWT) 安全方案,并对标记了 [Authorize] 的接口声明需要携带令牌。</item>
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/// </list>
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/// </summary>
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/// <remarks>
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/// 需要在请求管道中调用 <c>app.UseAuthentication()</c>(位于 <c>app.UseAuthorization()</c> 之前)。
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/// </remarks>
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public static IServiceCollection AddStoreHubJwt(this IServiceCollection services, IConfiguration configuration)
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{
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ArgumentNullException.ThrowIfNull(services);
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ArgumentNullException.ThrowIfNull(configuration);
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// JwtOptions:绑定 Jwt 配置节,启动时校验 HS256 签名密钥长度
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services.AddOptions<JwtOptions>()
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.Bind(configuration.GetSection(JwtOptions.SectionName))
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.Validate(
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o => !string.IsNullOrWhiteSpace(o.SigningKey)
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&& Encoding.UTF8.GetByteCount(o.SigningKey) >= 32,
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"Jwt:SigningKey 长度不足,HS256 签名密钥至少需要 32 字节(256位)。")
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.ValidateOnStart();
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services.AddHttpContextAccessor();
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// 令牌服务与当前用户访问器
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services.AddSingleton<ITokenService, TokenService>();
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services.AddScoped<ICurrentUser, CurrentUser>();
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// 在线会话存储(单点登录):基于 IMemoryCache 的进程内缓存,用于在线人员管理与退出销毁
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services.AddMemoryCache();
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services.AddSingleton<IOnlineUserStore, OnlineUserStore>();
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// JwtBearer 认证
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services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
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.AddJwtBearer(options =>
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{
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JwtOptions jwt = configuration.GetSection(JwtOptions.SectionName).Get<JwtOptions>() ?? new JwtOptions();
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options.TokenValidationParameters = jwt.ToTokenValidationParameters();
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options.Events = new JwtBearerEvents
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{
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OnChallenge = JwtBearerResponseHandler.OnChallenge,
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OnForbidden = JwtBearerResponseHandler.OnForbidden,
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// 单点登录校验:会话必须仍有效(未退出、未被新登录顶替)
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OnTokenValidated = context =>
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{
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IOnlineUserStore onlineUserStore = context.HttpContext.RequestServices.GetRequiredService<IOnlineUserStore>();
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ClaimsPrincipal? principal = context.Principal;
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string? userIdValue = principal?.FindFirst(JwtClaimTypes.UserId)?.Value;
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string? jti = principal?.FindFirst(JwtClaimTypes.Jti)?.Value;
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if (!int.TryParse(userIdValue, out int userId)
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|| string.IsNullOrWhiteSpace(jti)
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|| !onlineUserStore.IsTokenActive(userId, jti))
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{
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context.Fail(new SecurityTokenException("登录已失效,请重新登录"));
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}
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return Task.CompletedTask;
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},
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};
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});
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// OpenAPI:声明 Bearer(JWT) 安全方案(Scalar 页面即可显示 Authorize/输入 token),
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// 并仅对标记了 [Authorize] 的接口声明需要携带令牌(与宿主的 AddOpenApi 配置合并生效)
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services.Configure<VersionedOpenApiOptions>(options =>
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{
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// 在 OpenAPI 文档中声明 Bearer(JWT) 安全方案
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options.Document.AddDocumentTransformer((document, _, _) =>
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{
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document.Components ??= new OpenApiComponents();
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document.Components.SecuritySchemes ??= new Dictionary<string, IOpenApiSecurityScheme>();
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document.Components.SecuritySchemes.TryAdd("Bearer", new OpenApiSecurityScheme
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{
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Type = SecuritySchemeType.Http,
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Scheme = "bearer",
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BearerFormat = "JWT",
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Description = "登录接口返回的 accessToken,直接粘贴令牌内容即可(无需手动加 Bearer 前缀)。",
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});
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return Task.CompletedTask;
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});
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// 仅对标记了 [Authorize] 的接口声明需要携带令牌
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options.Document.AddOperationTransformer((operation, context, _) =>
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{
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IList<object> metadata = context.Description.ActionDescriptor.EndpointMetadata;
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bool requiresAuth = metadata.OfType<IAuthorizeData>().Any()
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&& !metadata.OfType<IAllowAnonymous>().Any();
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if (requiresAuth)
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{
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operation.Security =
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[
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new OpenApiSecurityRequirement
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{
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[new OpenApiSecuritySchemeReference("Bearer", context.Document, "")] = [],
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},
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];
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}
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return Task.CompletedTask;
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});
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});
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return services;
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}
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}
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