c7fa6aeb7f
把 Gitea (git.zhengchentao.win) 通过 MCP 暴露给 Claude.ai:列 repo、读代码、看 commits / issues / PR / orgs / packages / actions。 设计文档见 vault Coding/gitea-mcp/gitea-mcp 设计.md。 代码模板复用 obsidian-mcp(.NET 10 + ModelContextProtocol SDK + JwtBearer)。 19 个只读 Tool(全部 scope=read:gitea): Repo / 文件: - list_repos / read_repo - list_tree(max_entries=500 防爆) - read_file(max_bytes=1MB,超出 truncated=true) - search_code(走 /repos/search-code,indexer 未启用时返回结构化错误说明) 分支 / 提交: - list_branches / list_commits / read_commit(diff 文件数限 50) Issue / PR: - list_issues / read_issue(含评论) - list_pulls / read_pull(含评论 + 改动文件列表) Org / Package(用户额外授权 read:organization + read:package): - list_orgs / read_org - list_packages / read_package Gitea Actions(运维友好): - list_workflow_runs / read_run_log 技术栈: - .NET 10 + ModelContextProtocol SDK 1.0 - HttpClientFactory + Microsoft.Extensions.Http.Resilience(指数 backoff,5xx/429/网络错误重试) - JwtBearer (HS256, Current+Previous fallback, MapInboundClaims=false) - aud=gitea, scope=read:gitea, iss=https://auth.zhengchentao.win Gitea API client: - Authorization: token <PAT> (admin PAT,仅 read scope) - BaseUrl=https://git.zhengchentao.win - 错误映射:401/403 → UnauthorizedAccessException,404 → KeyNotFoundException,5xx → InvalidOperationException - RepoBlacklist 黑名单(owner/repo 精确匹配,默认空) 部署: - Dockerfile multi-stage,COPY --chown,non-root user - .gitea/workflows/build-image.yml:build + deploy 双 job,buildkit v0.13.2 - 容器内 :8080,宿主端口 9092 - 子域名 git-mcp.zhengchentao.win(区别于 Gitea 本体 git.zhengchentao.win) 测试:6/6 单测过(GiteaRepoFilter 黑名单匹配) Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
69 lines
2.8 KiB
C#
69 lines
2.8 KiB
C#
using GiteaMcp.Config;
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using Microsoft.AspNetCore.Authentication.JwtBearer;
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using Microsoft.IdentityModel.Tokens;
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using System.Text;
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namespace GiteaMcp.Auth;
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/// <summary>
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/// JWT Bearer 验签配置,与 obsidian-mcp 同款 HS256 对称密钥方案。
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/// ValidIssuer = https://auth.zhengchentao.win,ValidAudience = gitea。
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/// 支持 Current + Previous 双密钥(轮换窗口)。
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/// </summary>
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public static class JwtBearerSetup
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{
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public static IServiceCollection AddGiteaJwtBearer(
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this IServiceCollection services,
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IConfiguration configuration)
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{
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var jwtOpts = configuration.GetSection(JwtOptions.SectionName).Get<JwtOptions>()
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?? new JwtOptions();
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services
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.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
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.AddJwtBearer(options =>
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{
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// 关闭默认的入站 claim type 映射,否则 "sub"/"scope" 会被改写成
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// ClaimTypes.NameIdentifier 之类的长 URI,下游 FindFirst("scope") 取不到。
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options.MapInboundClaims = false;
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options.TokenValidationParameters = new TokenValidationParameters
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{
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ValidateIssuer = true,
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ValidIssuer = jwtOpts.Issuer,
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ValidateAudience = true,
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ValidAudience = jwtOpts.Audience,
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ValidateIssuerSigningKey = true,
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// ToList 物化一次,避免每次验签重建 SymmetricSecurityKey。
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IssuerSigningKeys = BuildSigningKeys(jwtOpts).ToList(),
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ValidateLifetime = true,
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// nas-auth 设计里允许 2 分钟时钟偏差
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ClockSkew = TimeSpan.FromMinutes(2),
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};
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});
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return services;
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}
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/// <summary>
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/// 构建 Current + Previous 双密钥列表,供 SDK 依次尝试验签。
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/// 轮换期间两把钥匙同时有效,过期的旧 Token 会被 ValidateLifetime 自然拦截。
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/// Current 未配置直接抛错,避免容器静默以"任何 token 都不通过"的状态运行。
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/// </summary>
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private static IEnumerable<SecurityKey> BuildSigningKeys(JwtOptions opts)
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{
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if (string.IsNullOrWhiteSpace(opts.SigningKeyCurrent))
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throw new InvalidOperationException(
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"Jwt:SigningKeyCurrent 未配置,gitea-mcp 无法启动。" +
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"请在 .env.shared 设置 JWT_SIGNING_KEY_CURRENT 与 nas-auth 共用。");
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yield return new SymmetricSecurityKey(Encoding.UTF8.GetBytes(opts.SigningKeyCurrent));
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if (!string.IsNullOrWhiteSpace(opts.SigningKeyPrevious))
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yield return new SymmetricSecurityKey(Encoding.UTF8.GetBytes(opts.SigningKeyPrevious));
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}
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}
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